Is the extreme phosphate sensitivity found among Australian plants a consequence of their adaptation to a severely phosphate-limited environment? The phosphorus (P)-impoverished soils of south-western Australia have allowed the evolution of many plants that are amazingly efficient at retrieving P from dying tissues. This project will contribute to the understanding of the mechanism determining P efficiency and will contribute significantly to the development of crops that are less reliant on non ....Is the extreme phosphate sensitivity found among Australian plants a consequence of their adaptation to a severely phosphate-limited environment? The phosphorus (P)-impoverished soils of south-western Australia have allowed the evolution of many plants that are amazingly efficient at retrieving P from dying tissues. This project will contribute to the understanding of the mechanism determining P efficiency and will contribute significantly to the development of crops that are less reliant on non-renewable P fertilisers.Read moreRead less
Ecohydrological feedbacks between vegetation and soil in natural and engineered landforms in arid Australia. We address 'An Environmentally Sustainable Australia'. 1. Water is the binding factor in our project, defining vegetation, geomorphology and hydrology. 2. Rehabilitation is an integral part of the mining business. Our project is instrumental in developing ecological engineering approaches to rehabilitation. 3. Ultimate goal of the project is to develop stable landforms, protecting underly ....Ecohydrological feedbacks between vegetation and soil in natural and engineered landforms in arid Australia. We address 'An Environmentally Sustainable Australia'. 1. Water is the binding factor in our project, defining vegetation, geomorphology and hydrology. 2. Rehabilitation is an integral part of the mining business. Our project is instrumental in developing ecological engineering approaches to rehabilitation. 3. Ultimate goal of the project is to develop stable landforms, protecting underlying rock. 4. We investigate locally adapted native plant species for use in arid-zone land rehabilitation, to preserve biodiversity. 5. The area of study is exposed to long droughts and cyclonic rainfall. Understanding the resilience of the landscape will provide pivotal insight into the impact and potential adaptive response to climate variability.Read moreRead less
Does plasma membrane perception of 2,4-D influence auxin resistance? This project aims to investigate the role of the cell membrane in synthetic auxin herbicide resistance by analysing the functions and interaction partners of candidate resistance proteins. It is expected that this project will generate new knowledge about the very early response of plants to auxin and the difference between susceptible and resistant weeds in perceiving auxin herbicides. Expected outcomes of this project include ....Does plasma membrane perception of 2,4-D influence auxin resistance? This project aims to investigate the role of the cell membrane in synthetic auxin herbicide resistance by analysing the functions and interaction partners of candidate resistance proteins. It is expected that this project will generate new knowledge about the very early response of plants to auxin and the difference between susceptible and resistant weeds in perceiving auxin herbicides. Expected outcomes of this project include the identification of potential herbicide synergists and a greater understanding of how weeds develop resistance to auxin herbicides. This should benefit Australian grain growers by providing more effective weed control options and lessening the amount of unnecessarily-applied herbicide in the environment.Read moreRead less
Ecophysiology of stem succulent halophytes subject to changes in salinity and water availability: distinguishing natural dynamics from potential mine-related impacts. This project contributes to the National Research Priority of an environmentally sustainable Australia. The project will underpin management strategies of vegetation in saline lakes/marshes; wetlands of national importance to biodiversity. Understanding the vegetation at the Fortescue Marshes will provide vital base-information for ....Ecophysiology of stem succulent halophytes subject to changes in salinity and water availability: distinguishing natural dynamics from potential mine-related impacts. This project contributes to the National Research Priority of an environmentally sustainable Australia. The project will underpin management strategies of vegetation in saline lakes/marshes; wetlands of national importance to biodiversity. Understanding the vegetation at the Fortescue Marshes will provide vital base-information for the future, and have flow-on benefits for improved strategies for revegetation of saline lands. Improvement of the publicly available Herbarium database on samphire species will also enable improved species identifications for conservation and/or rehabilitation efforts. The project will train a PhD student in an industry-relevant research area that is currently in high demand.Read moreRead less
Tightening the phosphorus cycle for grain legumes. Using unique core collections of chickpea, soybean and peanut with diverse genetic backgrounds, this project aims to unravel the mechanisms underlying high phosphorus-use efficiency (PUE) at morphological, physiological, biochemical and molecular levels in three major legume crops. Reduced levels of phosphorus and phytate in seeds will improve seed quality for humans and livestock and dramatically reduce phosphorus-fertiliser inputs. The identif ....Tightening the phosphorus cycle for grain legumes. Using unique core collections of chickpea, soybean and peanut with diverse genetic backgrounds, this project aims to unravel the mechanisms underlying high phosphorus-use efficiency (PUE) at morphological, physiological, biochemical and molecular levels in three major legume crops. Reduced levels of phosphorus and phytate in seeds will improve seed quality for humans and livestock and dramatically reduce phosphorus-fertiliser inputs. The identification of traits and genes associated with high PUE will allow transfer of key traits into commercial cultivars using molecular breeding approaches. Cultivars with improved PUE will enable reduced phosphate fertiliser input and loss of phosphate in runoff from agricultural systems.Read moreRead less
The roles viruses play in the decline of terrestrial orchids in Australia’s hotspot of global biodiversity. Plant viruses play both positive and negative roles in native plant health and population viability. This study will use deep sequencing and plant physiology approaches to elucidate how threatened terrestrial orchids respond to infection by exotic and indigenous viruses, allowing more informed management of critically-important ecosystems.
Coping with flooding: nutrient transport in oxygen-deprived roots. Flooding damages plants by reducing oxygen supply to roots. The project will study effects of low oxygen on nutrient transport by roots. Understanding root functioning during low oxygen will enhance knowledge of plant acclimation to soil water logging. The project will contribute to the National Goal of 'Responding to Climate Change and Variability'.
Advanced cryobanking for recalcitrant-seeded Australian rainforest plants. This project aims to develop an interdisciplinary research alliance to enhance the efficiency of ecological restoration for recalcitrant Australian rainforest plant species. The project expects to provide fundamental knowledge to target two major impediments to cryostorage of recalcitrant-seeded native species: desiccation sensitivity with relatively large size, and active metabolism and precocious germination. These attr ....Advanced cryobanking for recalcitrant-seeded Australian rainforest plants. This project aims to develop an interdisciplinary research alliance to enhance the efficiency of ecological restoration for recalcitrant Australian rainforest plant species. The project expects to provide fundamental knowledge to target two major impediments to cryostorage of recalcitrant-seeded native species: desiccation sensitivity with relatively large size, and active metabolism and precocious germination. These attributes severely limit the time available for effective use of collected germplasm for long-term storage. A combination of biochemical, biophysical and molecular simulation approaches will be used to optimise cryopreservation of a wide range of endangered Australian rainforest species. This should provide significant benefits such as enabling conservation agencies to greatly enhance their ability to preserve the unique Australian rainforest flora, particularly given current threats due to habitat loss and global warming.Read moreRead less
Is water deficit the predisposing factor associated with Agonis flexuosa (WA peppermint) decline in Western Australia? The incidence and severity of tree decline across species is now widespread in southern Western Australia. There is increasing concern about their management by agencies, landowners and the community, due to the loss of aesthetics, biodiversity and ecosystem services. This project will provide remote sensing tools to monitor peppermint health and relate declines to abiotic and b ....Is water deficit the predisposing factor associated with Agonis flexuosa (WA peppermint) decline in Western Australia? The incidence and severity of tree decline across species is now widespread in southern Western Australia. There is increasing concern about their management by agencies, landowners and the community, due to the loss of aesthetics, biodiversity and ecosystem services. This project will provide remote sensing tools to monitor peppermint health and relate declines to abiotic and biotic factors. An understanding of how water abstraction for urban development and declining rainfall predispose trees to decline, and the application of thinning regimes, fungicides and nutrient implants will provide potential tools to the wider community that can be used to manage tree health.Read moreRead less
Wandoo crown decline - an ecophysiological diagnosis. Eucalyptus wandoo forests and woodlands once covered a large area in SW Western Australia. Remnants of these ecosystems are now threatened by the Wandoo Crown Decline syndrome. We hypothesise that the progressive dieback of branches is due to drought stress, causing irreversible damage to water supply and/or predisposing trees to fungal disease. The project aims at identifying the physiological mechanism of Wandoo Crown Decline. This knowledg ....Wandoo crown decline - an ecophysiological diagnosis. Eucalyptus wandoo forests and woodlands once covered a large area in SW Western Australia. Remnants of these ecosystems are now threatened by the Wandoo Crown Decline syndrome. We hypothesise that the progressive dieback of branches is due to drought stress, causing irreversible damage to water supply and/or predisposing trees to fungal disease. The project aims at identifying the physiological mechanism of Wandoo Crown Decline. This knowledge is imperative for the assessment of risks for wandoo populations and for the formulation of management options.Read moreRead less