ORCID Profile
0000-0002-4936-9648
Current Organisations
University of Western Australia
,
The University of Western Australia Faculty of Science
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Publisher: Springer Science and Business Media LLC
Date: 12-1979
DOI: 10.1007/BF01275807
Publisher: Elsevier
Date: 2014
Publisher: Elsevier
Date: 2014
Publisher: Elsevier BV
Date: 12-1998
Publisher: Elsevier
Date: 2014
Publisher: CSIRO Publishing
Date: 1994
DOI: 10.1071/BT9940191
Abstract: Germination of seed of Anigozanthos (Haemodoraceae) species is usually low and unreliable which hinders the propagation of sexually generated progeny, impedes plant breeding activities and their use in horticulture. This study was undertaken to investigate the basis of these germination problems. Seeds of cultivated Anigozanthos manglesii D. Don. were shown to possess two mechanisms for regulating seed germination, both of which were external to the embryo. Embryos germinated freely on excision and culture on nutrient agar. This first barrier is a physico-chemical barrier and can be eliminated by a brief treatment with 5 M KOH and less effectively by physical abrasion with 50% H2SO4 or 0.7% NaOCl. Release of this barrier was correlated with permeability to fluorescein diacetate (FDA) and this proved to be a more useful indicator of seed viability than 2,3,5-triphenyl tetrazolium chloride (TTC). The other barrier was physiological and could be eliminated by treatment with GA3 or KNO3. Treatment of A. viridis Endl., A. humilis Lindley and A. flavidus DC. with KOH or H2SO4 with or without GA(3) elicited a small, a nil or negative response showing that mechanisms of control of germination may differ between taxa. Observations on the effects of temperature and duration of storage suggest mechanisms which may be significant in natural systems: moist stratification at 5°C caused reduced germination but sustained viability (as assessed by FDA) while dry seed stored at room temperature, showed increased germination with increasing duration of storage. The chilling response may indicate the capacity to initiate secondary dormancy under unfavourable germination conditions.
Publisher: Springer Science and Business Media LLC
Date: 05-1981
DOI: 10.1007/BF00386533
Publisher: CSIRO Publishing
Date: 1994
DOI: 10.1071/EA9941217
Abstract: The effects of 3 levels of irrigation (25, 50, 75% pan replacement) on growth and flower production were studied on 2 container-grown Geraldton wax cultivars (Alba and Purple Pride) under field conditions. Water deficit during the vegetative phase reduced all vegetative growth components (shoot number, primary stem length, cumulative stem length, leaf number, crown area) and flower production in both cultivars. Primary stem length was reduced by 47% and shoot or flower number by % when irrigation was reduced from 75 to 25% pan replacement. The response to reduced irrigation was more severe in Purple Pride than in Alba. During the vegetative phase, 800-840 mm water or 60-63% pan evaporation is required to maximise marketable stems of 90 cm under the conditions studied.
Publisher: Universite de Bordeaux
Date: 03-08-2022
DOI: 10.20870/OENO-ONE.2022.56.3.3796
Abstract: Fruit ripening on a perennial tree or vine is typically asynchronous and rarely investigated. In commerce, this is problematic as it impairs s ling to meet commercial maturity and quality standards at harvest. For grapevines, understanding within-grapevine variability in berry maturity will benefit precision management and harvest planning. It is accepted that variation in maturity is approximately equally allocated at the within- and between-vine scale. However, the mechanistic and ecological factors that cause functional variance are poorly understood and rarely documented.This study aimed to identify structural and spatial within-vine attributes associated with berry composition at harvest related to available resources from the whole grapevine. Vegetative and reproductive biomass attributes within- and between-vines were analysed for cv. Cabernet-Sauvignon trained as a cordon, spur-pruned system using a Smart-Dyson trellis in a ‘New World’ industrial-scale vineyard. The vines were located in northern Margaret River, Western Australia. Variability in soluble solids, anthocyanins and phenolics were analysed for clusters and corresponding canopy characteristics.Berry size was the best predictor of variance in maturity among sugar, anthocyanins and phenolics composition within in idual vines. Smaller stems or fruit had greater variation in maturity than larger stems or fruit. However, the relationship between whole plant biomass and fruit maturity interacted at different scales the first report for grapevines. Including different vine-biomass scales helped explain the heteroscedasticity observed when the in idual vine effect was excluded from the analysis. These findings suggest that high vigour grapevines could benefit from differential management, regardless of harvest index. Furthermore, these findings may help explain the ersity of response to treatment effects such as cluster or leaf thinning reported previously for perennial fruit.
Publisher: Oxford University Press (OUP)
Date: 06-04-2016
DOI: 10.1093/JXB/ERW138
Abstract: The language of dormancy is rich and poetic, as researchers spanning disciplines and decades have attempted to understand the spell that entranced 'Sleeping Beauty', and how she was gently awoken. The misleading use of 'dormancy', applied to annual axillary buds, for ex le, has confounded progress. Language is increasingly important as genetic and genomic approaches become more accessible to species of agricultural and ecological importance. Here we examine how terminology has been applied to different eco-physiological states in plants, and with pertinent reference to quiescent states described in other domains of life, in order to place plant quiescence and dormancy in a more complete context than previously described. The physiological consensus defines latency or quiescence as opportunistic avoidance states, where growth resumes in favourable conditions. In contrast, the dormant state in higher plants is entrained in the life history of the organism. Competence to resume growth requires quantitative and specific conditioning. This definition applies only to the embryo of seeds and specialized meristems in higher plants however, mechanistic control of dormancy extends to mobile signals from peripheral tissues and organs, such as the endosperm of seed or subtending leaf of buds. The distinction between dormancy, quiescence, and stress-hardiness remains poorly delineated, most particularly in buds of winter perennials, which comprise multiple meristems of differing organogenic states. Studies in seeds have shown that dormancy is not a monogenic trait, and limited study has thus far failed to canalize dormancy as seen in seeds and buds. We argue that a common language, based on physiology, is central to enable further dissection of the quiescent and dormant states in plants. We direct the topic largely to woody species showing a single cycle of growth and reproduction per year, as these bear the majority of global timber, fruit, and nut production, as well being of great ecological value. However, for context and hypotheses, we draw on knowledge from annuals and other specialized plant conditions, from a perspective of the major physical, metabolic, and molecular cues that regulate cellular activity.
Publisher: CSIRO Publishing
Date: 1992
DOI: 10.1071/BT9920151
Abstract: Longevity of Verticordia pollen was assessed to develop the technology necessary to allow hybridisation of species that flower in different seasons. Pollen, either attached to the stigmatic pollen presenter or within the anther, was desiccated and stored at temperatures from ambient to -196°C. Verticordia pollen retained 75-80% viability at -196°C, and even when stored at room temperature for 6 months maintained a viability of 50%.
Publisher: CSIRO Publishing
Date: 1973
DOI: 10.1071/EA9730604C
Abstract: Effect of harvest rainfall on loss of dried vine fruits was examined by step-wise regression with dried fruit packed per year as the dependent variable and rainfall, summed at half-monthly intervals, as an independent variable. Secular trend variables were fitted to account for trends in annual production. Fitted equations accounted for 81, 77, and 42 per cent of the variation in total production for the years 1925 to 1970. of sultanas, currants, and raisins, respectively. Half the non-trend variance of sultana production and one-third of that of currants and raisins was accounted for by rainfall during statistically selected periods. These were, first and second half of March for sultanas, first half of January and first half of February for currants, and second half of March for raisins. An attempt to enhance accuracy in an analysis of sultana production (Sunraysia district, 1946 to 1971) by including per cent fruitful buds and maximum daily temperatures (summed at six day intervals) in November as additional covariates was only partially successful. Per cent fruitful buds was not significantly related to production but daily maximum temperatures summed over the period November 25-30 inclusive accounted for a small (13 per cent) but significant portion of non-trend variance. A shift in time of maximum damage to sultanas was indicated from the second half of March in the period 1925 to 1945 to the first half of March since then. These results are discussed in terms of economic importance and type of damage sustained. Ways of reducing the magnitude of the problem are suggested.
Publisher: CSIRO Publishing
Date: 1994
DOI: 10.1071/BT9940191
Abstract: Germination of seed of Anigozanthos (Haemodoraceae) species is usually low and unreliable which hinders the propagation of sexually generated progeny, impedes plant breeding activities and their use in horticulture. This study was undertaken to investigate the basis of these germination problems. Seeds of cultivated Anigozanthos manglesii D. Don. were shown to possess two mechanisms for regulating seed germination, both of which were external to the embryo. Embryos germinated freely on excision and culture on nutrient agar. This first barrier is a physico-chemical barrier and can be eliminated by a brief treatment with 5 M KOH and less effectively by physical abrasion with 50% H2SO4 or 0.7% NaOCl. Release of this barrier was correlated with permeability to fluorescein diacetate (FDA) and this proved to be a more useful indicator of seed viability than 2,3,5-triphenyl tetrazolium chloride (TTC). The other barrier was physiological and could be eliminated by treatment with GA3 or KNO3. Treatment of A. viridis Endl., A. humilis Lindley and A. flavidus DC. with KOH or H2SO4 with or without GA(3) elicited a small, a nil or negative response showing that mechanisms of control of germination may differ between taxa. Observations on the effects of temperature and duration of storage suggest mechanisms which may be significant in natural systems: moist stratification at 5°C caused reduced germination but sustained viability (as assessed by FDA) while dry seed stored at room temperature, showed increased germination with increasing duration of storage. The chilling response may indicate the capacity to initiate secondary dormancy under unfavourable germination conditions.
Publisher: Oxford University Press (OUP)
Date: 30-04-2019
DOI: 10.1093/JXB/ERZ200
Abstract: Molecular modelling, histochemistry, and micro-computed tomography reveal that the apoplastic pore size is dynamically regulated during bud burst in grapevine, and associated with oxygenation of the meristematic core.
Publisher: Informa UK Limited
Date: 1989
Publisher: CSIRO Publishing
Date: 1995
DOI: 10.1071/AR9950581
Abstract: Diurnal and seasonal water use and the effects of different levels of irrigation on growth and flower production were studied using commercially cultivated Geraldton wax (Chamelaucium uncinatum Schauer cv. Purple Pride) under semi-arid conditions. Water use and growth responses to increased irrigation differed widely with vigour. Vigorous plants had extensive root systems and used more water than less vigorous plants whether irrigated or unirrigated and responded to increased irrigation by producing more shoots, secondary stems and flowers. In vigorous plants, marketable stem length and flower number were increased from 63 to 89 cm and 61 to 226 when irrigation was increased from 25 to 75% of pan replacement respectively. Less vigorous plants had distorted root systems (i.e. curling and circling) and showed no significant growth response to increased irrigation. Increase of stem length to a desirable length of 90 cm in less vigorous plants, which are wide-spread in commercial plantings, was unlikely. The results highlight the significance of good propagation and establishment techniques to aid vigorous growth. The sap flow study shows that Geraldton wax is a high water using species. A single plant can use in excess of 20 L per day under high evaporative demand when root growth is not limiting.
Publisher: CSIRO Publishing
Date: 1981
DOI: 10.1071/BT9810463
Abstract: Changes in cell vdume and shape in different layers of the dermal system of the grape Vitis vinifera have been analysed in relation to position along the radius of the fruit and fruit shape. Fruit surface area was found to be a function of changes in both cell area and cell number, though cell number effects were predominant. Cell volume generally increased exponentially from the epidermis inwards, though no single function adequately described the pattern for all cultivars. Deviations from a continuous pattern of change of volume were compatible with the possible occurrence of polyploid periclinal chimeras or endoploids. These results suggest that differences in cellular structure were determined by mechanisms that were independent of potential stresses associated with differences in fruit size and shape.
Publisher: Oxford University Press (OUP)
Date: 09-2015
DOI: 10.1093/AOB/MCV123
Publisher: CSIRO Publishing
Date: 1993
DOI: 10.1071/BT9930739
Abstract: The effects on papaw (Carica papaya L.) shoot growth of the carbohydrates sucrose, fructose, glucose and ribose singly and combined, were compared at a range of concentrations, in both autoclaved and filtered media. Fructose (10 g L-1), when autoclaved together with other media components, consistently promoted growth of shoots from buds on nodal sections or buds excised with a wedge of stem tissue. This enhancement was seen if the fructose was used singly or in combination with 10 g L-1 sucrose. By contrast, autoclaved media containing fructose reduced growth of small axillary bud explants. Decreasing the pH of fructose solution from 5.8 to 4.4 before autoclaving enhanced growth of buds from nodal sections. Other sugars in the D-ketose group inhibited papaw shoot growth totally when autoclaved with other media components. A radish cotyledon bioassay of solutions of fructose autoclaved singly or with NH4NO3 (20 mM) showed no evidence of cytokinin effects.
Publisher: Hindawi Limited
Date: 05-03-2020
DOI: 10.1111/AJGW.12426
Publisher: Informa UK Limited
Date: 12-1993
Publisher: MDPI AG
Date: 23-06-2023
Abstract: Hydrogen cyanamide (HC) has been widely used in horticulture to trigger bud burst following dormancy. Its use has been banned in some countries due to human health concerns, however the search for effective safe alternatives is delayed by lack of knowledge of the mechanism of HC action. Earlier studies demonstrate that HC stimulates the production of reactive oxygen species (ROS) and alters the rate of cell ision. However, the relationships between HC effects on ROS, redox (reduction/oxidation) homeostasis and cell ision are unknown. This study used Arabidopsis thaliana ((L.) Heynh.) seedlings expressing the redox reporter roGFP2 to measure the oxidation states of the nuclei and cytosol in response to HC treatment. The Cytrap dual cell cycle phase marker system and flow cytometry were used to study associated changes in cell proliferation. HC (1.5 mM) reversibly inhibited root growth during a 24 h treatment. Higher concentrations were not reversible. HC did not synchronise the cell cycle, in contrast to hydroxyurea. Rather, HC caused a gradual accumulation of cells in the G2/M phase and decline of G1/S phase cells, 16 to 24 h post-treatment. This was accompanied by increased oxidation of both the nuclei and cytosol. Taken together, these findings show that HC impairs proliferation of embryonic root meristem cells in a reversible manner through restriction of G2/M transition accompanied by increased cellular oxidation.
Publisher: Springer Science and Business Media LLC
Date: 04-1993
DOI: 10.1007/BF01997591
Publisher: Springer Netherlands
Date: 1982
Publisher: CSIRO Publishing
Date: 1972
DOI: 10.1071/AR9720017
Abstract: A technique was devised to measure the internal turgor pressure required for fruit rupture in order to assess resistance to splitting objectively rather than rely solely on field observation. In the laboratory, fruit of uniform maturity and known osmotic potential were immersed in a range of osmotica to create a known turgor pressure at equilibrium. "Critical turgor", the pressure which resulted in 50% of the berries splitting, was approximately 15 atm in grape cultivars prone to splitting and 40 atm in resistant cultivars. Cultural treatments with growth regulators subsequently affected fruit resilience. p-Chlorophenoxyacetic acid lowered critical turgor, while gibberellic acid caused an increase. These laboratory-based observations coincided with field experience. Additional factors in fruit splitting, including berry morphology and anatomy, are discussed.
Publisher: CSIRO Publishing
Date: 1987
DOI: 10.1071/BT9870701
Abstract: Three variegated chimeras of L. confertus and T. laurina arise spontaneously in seedling populations: 1, white margin: green centre, 2, green margin: light green centre and 3, green margin: white centre. Types 1 and 2 are found in T. laurina and types 1 and 3 in L. confertus. We have determined chloroplast distribution in the leaf tissues by fluorescence microscopy to assess the basis for these colour patterns. In L. confertus, a layer of collenchyma underlies the adaxial epidermis, replaces the upper layer of palisade, and does not mask mutant inner tissues, concealed by the adaxial layer of palisade in type 2 leaves of T. laurina. The central colour patterns are explained on the basis of accepted paths of cell lineage in leaf development (protoderm green in all three types hypodermal derivatives genetically green in 2 and 3 and subhypodermal cells chlorophyll-deficient in types 2 and 3). The cell lineages postulated are similar in both species and we show that the observations can be accounted for only by a shift in lineage path during leaf ontogeny. We conclude that some established concepts of leaf ontogeny require revision.
Publisher: Oxford University Press (OUP)
Date: 03-1994
Publisher: Informa UK Limited
Date: 12-1996
Publisher: Oxford University Press (OUP)
Date: 08-1981
DOI: 10.1104/PP.68.2.371
Publisher: Oxford University Press (OUP)
Date: 11-1995
Publisher: Oxford University Press (OUP)
Date: 02-1993
Publisher: Wiley
Date: 05-1978
Publisher: CSIRO Publishing
Date: 1973
DOI: 10.1071/EA9730604
Abstract: Effect of harvest rainfall on loss of dried vine fruits was examined by step-wise regression with dried fruit packed per year as the dependent variable and rainfall, summed at half-monthly intervals, as an independent variable. Secular trend variables were fitted to account for trends in annual production. Fitted equations accounted for 81, 77, and 42 per cent of the variation in total production for the years 1925 to 1970. of sultanas, currants, and raisins, respectively. Half the non-trend variance of sultana production and one-third of that of currants and raisins was accounted for by rainfall during statistically selected periods. These were, first and second half of March for sultanas, first half of January and first half of February for currants, and second half of March for raisins. An attempt to enhance accuracy in an analysis of sultana production (Sunraysia district, 1946 to 1971) by including per cent fruitful buds and maximum daily temperatures (summed at six day intervals) in November as additional covariates was only partially successful. Per cent fruitful buds was not significantly related to production but daily maximum temperatures summed over the period November 25-30 inclusive accounted for a small (13 per cent) but significant portion of non-trend variance. A shift in time of maximum damage to sultanas was indicated from the second half of March in the period 1925 to 1945 to the first half of March since then. These results are discussed in terms of economic importance and type of damage sustained. Ways of reducing the magnitude of the problem are suggested.
Publisher: Oxford University Press (OUP)
Date: 1980
DOI: 10.1093/JXB/31.1.152
Publisher: Hindawi Limited
Date: 07-2004
Publisher: Elsevier
Date: 2014
Publisher: Springer Netherlands
Date: 1981
Publisher: CSIRO Publishing
Date: 1981
DOI: 10.1071/BT9810475
Abstract: The internal pressure required to cause splitting has been determined for fruit of nine cultivars of Vitis vinifeva and related to geometrical and strucrural attributes. The integrated cell-wall content of the dermal system or skin accounted for 56% of the variance of the pressure required to cause splitting of 50% of fruit. No other measured factor was found to be correlated statistically with resistance of grapes to splitting. Nevertheless, it is considered that no single character determines stress resistance but that this is achieved by a combination of geometric, structural and physiological factors.
Publisher: Frontiers Media SA
Date: 24-02-2022
Abstract: Whether the ision of cells of a dormant meristem may be arrested, e.g., in the G1 phase, has proven to be an extremely difficult hypothesis to test. This is particularly so for woody perennial buds, where dormant and quiescent states are diffuse, and the organ may remain visibly unchanged for 6–9 months of the year. Flow cytometry (FCM) has been widely applied in plant studies to determine the genome size and endopolyploidy. In this study, we present the application of FCM to measure the cell cycle status in mature dormant buds of grapevine ( Vitis vinifera cv. Cabernet Sauvignon), which represent a technically recalcitrant structure. This protocol illustrates the optimisation and validation of FCM data analysis to calculate the cell cycle status, or mitotic index, of dormant grapevine buds. We have shown how contamination with debris can be experimentally managed and give reference to the more malleable tomato leaves. We have also given a clear illustration of the primary pitfalls of data analysis to avoid artefacts or false results. Data acquisition and analysis strategies are detailed and can be readily applied to analyse FCM data from other recalcitrant plant s les.
Publisher: Elsevier
Date: 2014
Publisher: Wiley
Date: 28-02-2018
DOI: 10.1111/PCE.13141
Abstract: Dormant or quiescent buds of woody perennials are often dense and in the case of grapevine (Vitis vinifera L.) have a low tissue oxygen status. The precise timing of the decision to resume growth is difficult to predict, but once committed, the increase in tissue oxygen status is rapid and developmentally regulated. Here, we show that more than a third of the grapevine homologues of widely conserved hypoxia-responsive genes and nearly a fifth of all grapevine genes possessing a plant hypoxia-responsive promoter element were differentially regulated during bud burst, in apparent harmony with resumption of meristem identity and cell-cycle gene regulation. We then investigated the molecular and biochemical properties of the grapevine ERF-VII homologues, which in other species are oxygen labile and function in transcriptional regulation of hypoxia-responsive genes. Each of the 3 VvERF-VIIs were substrates for oxygen-dependent proteolysis in vitro, as a function of the N-terminal cysteine. Collectively, these data support an important developmental function of oxygen-dependent signalling in determining the timing and effective coordination bud burst in grapevine. In addition, novel regulators, including GASA-, TCP-, MYB3R-, PLT-, and WUS-like transcription factors, were identified as hallmarks of the orderly and functional resumption of growth following quiescence in buds.
Publisher: Informa UK Limited
Date: 06-1999
Publisher: Informa UK Limited
Date: 06-1999
Publisher: Elsevier
Date: 2014
Publisher: University of Chicago Press
Date: 12-1987
DOI: 10.1086/337673
Publisher: Hindawi Limited
Date: 02-2009
Publisher: CSIRO Publishing
Date: 1994
DOI: 10.1071/BT9940205
Abstract: Changes in leaf angle and flower diameter of Geraldton wax (Chamelaucium uncinatum) in response to declining shoot water potential (ψshoot)) were assessed as indicators of plant water status. Leaves and petals in Geraldton wax moved vertically as ψshoot decreased. In cv. Purple Pride, the leaf angle of recently-matured, fully-expanded leaves and the diameter of fully developed flowers showed strong linear correlations with declining ψshoot (r2 = 0.90 and 0.94 respectively). The relationships were less strong when applied to almost fully expanded leaves (r2 = 0.51) and young flowers (r2 = 0.64). Older leaves showed no consistent correlation between leaf angle and ψshoot (r2 = 0.01). Similar results were observed in cvv. Alba and Lady Stephanie, but the change in orientation for a given change in ψshoot was smaller in cv. Alba than those observed in cvv. Purple Pride and Lady Stephanie. Vertical orientation of leaves and flower petals in droughted plants could be used as indicators of level of water deficit.
Publisher: Elsevier
Date: 2014
Publisher: Oxford University Press (OUP)
Date: 03-1982
DOI: 10.1104/PP.69.3.585
Publisher: Elsevier
Date: 2014
Publisher: CSIRO Publishing
Date: 2004
DOI: 10.1071/BT03006
Abstract: A study of chloroplast DNA variation and inheritance in waxflowers (Myrtaceae) was undertaken as a basis for validating parentage in putative, juvenile hybrid plants and in naturally occurring hybrids. Polymerase chain reaction lification of three chloroplast DNA regions, followed by restriction of the lified products, was used to identify restriction fragment length polymorphisms (RFLP) in 18 Chamelaucium uncinatum and C.�megalopetalum genotypes. Five cpDNA haplotypes were observed within the two species studied. In C.�uncinatum, three site mutations and one length mutation were observed, corresponding to three cpDNA haplotypes and in C. megalopetalum, two cpDNA haplotypes were observed.Chloroplast DNA (cpDNA) inheritance was studied in 17 intraspecific and 33 interspecific hybrids by using the cpDNA polymorphisms between the female and the male parents. Maternal cpDNA inheritance was observed in all cases, as in most angiosperms. These results support a 95.5% probability of maternal cpDNA inheritance in waxflowers at the 90% confidence level.The method has been used to identify maternal parents of naturally occurring hybrids in our waxflower breeding program. It may also be applied to the study of the evolution of natural populations and, in this study, indicates distinct lines of evolution for in idual populations of the two species.
Publisher: Elsevier
Date: 2023
Publisher: Informa UK Limited
Date: 09-1994
Publisher: Wiley
Date: 16-11-2022
DOI: 10.1002/FES3.431
Abstract: Grapevine ( Vitis vinifera L.) is the most widely cultivated fruit crop worldwide, contributing substantially to rural economies. The production cycle and productivity depend on seasonal cues and can range from a strongly deciduous habit in cool‐temperate climates to evergreen in subtropical and tropical climates. The influence of the different seasonal conditions on the dynamics of the perennating bud, including the degree of growth and metabolic quiescence, cell cycle status and internal tissue oxygen status between different climatic zones is largely unknown. This knowledge is important for adapting to changing climate conditions and for crop expansion to wider regions. This study investigated the growth and metabolic physiology of the perennating bud of commercially grown cv. Flame Seedless table grapes from Mediterranean and subtropical climate in Western Australia, from summer until late winter. Climate data were obtained, showing differences in minimum (night) temperature between the two climates, reflected by differences in calculated chilling units. Bud dormancy increased during autumn of both climates however, the onset and depth of dormancy of buds from the subtropical region were attenuated relative to the Mediterranean condition. Stark contrasts were also observed in metabolism. The respiration of subtropical‐grown buds increased over fivefold during late autumn and winter, while that of Mediterranean‐grown buds increased less than twofold. This was also reflected in less desiccation of the subtropical‐grown buds, and an apparently greater degree of hypoxia within the bud during late winter, prior to bud burst. Collectively, these data show pronounced differences in growth and metabolic physiology of commercially grown table grapes, which provide a foundation for investigating the influence of differing climate and seasonality on the growth and productivity of table grapes and how these may be managed through breeding and agronomy.
Location: Australia
No related grants have been discovered for John Considine.