ORCID Profile
0000-0002-2158-4485
Current Organisation
University of Western Australia
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Elsevier BV
Date: 09-2023
Publisher: MDPI AG
Date: 23-08-2022
Abstract: Polyketides are structurally erse and physiologically active secondary metabolites produced by many organisms, including fungi. The biosynthesis of polyketides from acyl-CoA thioesters is catalyzed by polyketide synthases, PKSs. Polyketides play roles including in cell protection against oxidative stress, non-constitutive (toxic) roles in cell membranes, and promoting the survival of the host organisms. The genus Verticillium comprises many species that affect a wide range of organisms including plants, insects, and other fungi. Many are known as causal agents of Verticillium wilt diseases in plants. In this study, a comparative genomics approach involving several Verticillium species led us to evaluate the potential of Verticillium species for producing polyketides and to identify putative polyketide biosynthesis gene clusters. The next step was to characterize them and predict the types of polyketide compounds they might produce. We used publicly available sequences from ten species of Verticillium including V. dahliae, V. longisporum, V. nonalfalfae, V. alfalfae, V. nubilum, V. zaregamsianum, V. klebahnii, V. tricorpus, V. isaacii, and V. albo-atrum to identify and characterize PKS gene clusters by utilizing a range of bioinformatic and phylogenetic approaches. We found 32 putative PKS genes and possible clusters in the genomes of Verticillium species. All the clusters appear to be complete and functional. In addition, at least five clusters including putative DHN-melanin-, cytochalasin-, fusarielien-, fujikurin-, and lijiquinone-like compounds may belong to the active PKS repertoire of Verticillium. These results will pave the way for further functional studies to understand the role of these clusters.
Publisher: Wiley
Date: 03-2018
Publisher: Elsevier BV
Date: 09-2018
Publisher: Informa UK Limited
Date: 07-2012
Publisher: Springer Science and Business Media LLC
Date: 13-01-2023
DOI: 10.1038/S41598-022-27338-W
Abstract: Water deficit stress exposure frequently constrains plant and agri-food production globally. Biostimulants (BSs) can be considered a new tool in mitigating water deficit stress. This study aimed to understand how BSs influence water deficit stress perceived by savory plants ( Satureja hortensis L.), an important herb used for nutritional and herbal purposes in the Middle East. Three BS treatments, including bio-fertilizers, humic acid and foliar application of amino acid (AA), were implemented. Each treatment was applied to savory plants using three irrigation regimes (low, moderate and severe water deficit stress FC100, FC75 and FC50, respectively). Foliar application of AA increased dry matter yield, essential oil (EO) content and EO yield by 22%, 31% and 57%, respectively. The greatest EO yields resulted from the moderate (FC75) and severe water deficit stress (FC50) treatments treated with AA. Primary EO constituents included carvacrol (39–43%), gamma-terpinene (27–37%), alpha-terpinene (4–7%) and p -cymene (2–5%). Foliar application of AA enhanced carvacrol, gamma-terpinene, alpha-terpinene and p -cymene content by 6%, 19%, 46% and 18%, respectively. Physiological characteristics were increased with increasing water shortage and application of AA. Moreover, the maximum activities of superoxide dismutase (3.17 unit mg −1 min −1 ), peroxidase (2.60 unit mg −1 min −1 ) and catalase (3.08 unit mg −1 min −1 ) were obtained from plants subjected to severe water deficit stress (FC50) and treated with AA. We conclude that foliar application of AA under water deficit stress conditions would improve EO quantity and quality in savory.
Publisher: Informa UK Limited
Date: 11-2011
Publisher: Elsevier BV
Date: 03-2012
Publisher: MDPI AG
Date: 10-03-2022
Abstract: Phytopathologists are actively researching the molecular basis of plant–pathogen interactions. The mechanisms of responses to pathogens have been studied extensively in model crop plant species and natural populations. Today, with the rapid expansion of genomic technologies such as DNA sequencing, transcriptomics, proteomics, and metabolomics, as well as the development of new methods and protocols, data analysis, and bioinformatics, it is now possible to assess the role of genetic variation in plant–microbe interactions and to understand the underlying molecular mechanisms of plant defense and microbe pathogenicity with ever-greater resolution and accuracy. Genetic variation is an important force in evolution that enables organisms to survive in stressful environments. Moreover, understanding the role of genetic variation and mutational events is essential for crop breeders to produce improved cultivars. This review focuses on genetic variations and mutational events associated with plant–pathogen interactions and discusses how these genome compartments enhance plants’ and pathogens’ evolutionary processes.
Publisher: Wiley
Date: 09-2012
Publisher: Springer Science and Business Media LLC
Date: 13-03-2020
Publisher: Oxford University Press (OUP)
Date: 12-08-2020
DOI: 10.1104/PP.20.00835
Publisher: Informa UK Limited
Date: 28-05-2022
Publisher: Wiley
Date: 31-10-2022
DOI: 10.1111/PPA.13501
Abstract: Blackleg, caused by a complex of Leptosphaeria species ( L . maculans and L . biglobosa ), is a fungal disease on Brassica species, especially important in canola ( Brassica napus ). Since the first report of L . biglobosa in Iran in 2007 and L . maculans in 2008, both species are now of major importance in Iran affecting 10 provinces and 30 regions, with a higher prevalence in the northern provinces of Mazandaran and Golestan. Despite the rapid progression of the disease and the emergence of new Leptosphaeria races in Iran, the research into this pathogen has not progressed at the same rate and is limited to phenotypic characterization studies, pathogenicity research, and to a lesser extent, disease management research. Given the rapid increase in canola cultivation in Iran and changes in the genetic ersity of the pathogen populations, it is likely that blackleg disease will increasingly become a severe threat to Iran’s canola production. Therefore, systematic and prospective studies, along with fundamental research on the pathogen's biology, epidemiology, and genetic ersity, would provide critical information for the development of disease management strategies. Here, we review the research that has been carried out to date on blackleg disease in Iran and describe the extent of progress towards disease control, especially in disease‐prone regions.
Publisher: Elsevier BV
Date: 2013
Publisher: Elsevier BV
Date: 11-2012
Publisher: Wiley
Date: 10-10-2020
DOI: 10.1111/PBI.13262
Publisher: Informa UK Limited
Date: 10-2012
Publisher: MDPI AG
Date: 04-11-2022
Abstract: Copy number variations (CNVs) are defined as deletions, duplications and insertions among in iduals of a species. There is growing evidence that CNV is a major factor underlining various autoimmune disorders and diseases in humans however, in plants, especially oilseed crops, the role of CNVs in disease resistance is not well studied. Here, we investigate the genome-wide ersity and genetic properties of CNVs in resistance gene analogues (RGAs) across eight Brassica napus lines. A total of 1137 CNV events (704 deletions and 433 duplications) were detected across 563 RGAs. The results show CNVs are more likely to occur across clustered RGAs compared to singletons. In addition, 112 RGAs were linked to a blackleg resistance QTL, of which 25 were affected by CNV. Overall, we show that the presence and abundance of CNVs differ between lines, suggesting that in B. napus, the distribution of CNVs depends on genetic background. Our findings advance the understanding of CNV as an important type of genomic structural variation in B. napus and provide a resource to support breeding of advanced canola lines.
Publisher: Elsevier BV
Date: 12-2016
Publisher: Springer Science and Business Media LLC
Date: 21-02-2013
DOI: 10.1007/S11274-013-1296-2
Abstract: We evaluated response differences of normal and transformed (so-called 'hairy') roots of soybean (Glycine max L. (Merr.), cv L17) to the Nod-factor inducing isoflavone genistein and salinity by quantifying growth, nodulation, nitrogen fixation and biochemical changes. Composite soybean plants were generated using Agrobacterium rhizogenes-mediated transformation of non-nodulating mutant nod139 (GmNFR5α minus) with complementing A. rhizogenes K599 carrying the wild-type GmNFR5α gene under control of the constitutive CaMV 35S promoter. We used genetic complementation for nodulation ability as only nodulated roots were scored. After hairy root emergence, primary roots were removed and composite plants were inoculated with Bradyrhizobium japonicum (strain CB1809) pre-induced with 10 μM genistein and watered with NaCl (0, 25, 50 and 100 mM). There were significant differences between hairy roots and natural roots in their responses to salt stress and genistein application. In addition, there were noticeable nodulation and nitrogen fixation differences. Composite plants had better growth, more root volume and chlorophyll as well as more nodules and higher nitrogenase activity (acetylene reduction) compared with natural roots. Decreased lipid peroxidation, proline accumulation and catalase eroxidase activities were found in 'hairy' roots under salinity stress. Genistein significantly increased nodulation and nitrogen fixation and improved roots and shoot growth. Although genistein alleviated lipid peroxidation under salinity stress, it had no significant effect on the activity of antioxidant enzymes. In general, composite plants were more competitive in growth, nodulation and nitrogen fixation than normal non-transgenic even under salinity stress conditions.
Publisher: MDPI AG
Date: 03-02-2022
Abstract: Heat stress events during flowering in Brassica crops reduce grain yield and are expected to increase in frequency due to global climate change. We evaluated heat stress tolerance and molecular genetic ersity in a global collection of Brassica rapa accessions, including leafy, rooty and oilseed morphotypes with spring, winter and semi-winter flowering phenology. Tolerance to transient daily heat stress during the early reproductive stage was assessed on 142 lines in a controlled environment. Well-watered plants of each genotype were exposed to the control (25/15 °C day/night temperatures) or heat stress (35/25 °C) treatments for 7 d from the first open flower on the main stem. Bud and leaf temperature depression, leaf conductance and chlorophyll content index were recorded during the temperature treatments. A large genetic variation for heat tolerance and sensitivity was found for above-ground biomass, whole plant seed yield and harvest index and seed yield of five pods on the main stem at maturity. Genetic ersity was assessed on 212 lines with 1602 polymorphic SNP markers with a known location in the B. rapa physical map. Phylogenetic analyses confirmed two major genetic populations: one from East and South Asia and one from Europe. Heat stress-tolerant lines were distributed across erse geographic origins, morphotypes (leafy, rooty and oilseed) and flowering phenologies (spring, winter and semi-winter types). A genome-wide association analysis of heat stress-related yield traits revealed 57 SNPs distributed across all 10 B. rapa chromosomes, some of which were associated with potential candidate genes for heat stress tolerance.
Publisher: Springer Science and Business Media LLC
Date: 17-10-2017
DOI: 10.1007/S00122-017-2993-2
Abstract: Plant genome ersity varies from single nucleotide polymorphisms to large-scale deletions, insertions, duplications, or re-arrangements. These re-arrangements of sequences resulting from duplication, gains or losses of DNA segments are termed copy number variations (CNVs). During the last decade, numerous studies have emphasized the importance of CNVs as a factor affecting human phenotype in particular, CNVs have been associated with risks for several severe diseases. In plants, the exploration of the extent and role of CNVs in resistance against pathogens and pests is just beginning. Since CNVs are likely to be associated with disease resistance in plants, an understanding of the distribution of CNVs could assist in the identification of novel plant disease-resistance genes. In this paper, we review existing information about CNVs their importance, role and function, as well as their association with disease resistance in plants.
Publisher: Society of Land Measurements and Cadastre from Transylvania
Date: 13-12-2015
Publisher: Springer Science and Business Media LLC
Date: 09-02-2023
Publisher: Wiley
Date: 11-2019
DOI: 10.2134/AGRONJ2019.02.0097
Abstract: The current study uses 2‐yr trial data set to investigate the impacts of ridge‐furrow planting system and wheat ( Triticum aestivum L.) straw mulching on sunflower ( Helianthus annuus L.) yield and some soil parameters. Field experiments were conducted in 2014 and 2015 in two different locations (Tehran and Mashhad Provinces, Iran). The experiments were laid out in a randomized complete block design comprised of four treatments, including control that is, neither ridge‐furrow planting system nor wheat straw mulching (RF 0 M 0 ) ridge‐furrow planting system without wheat straw mulching (RF 1 M 0 ) ridge‐furrow planting system with wheat straw mulching only covering 50% of the soil surface (RF 1 M 50 ) and ridge‐furrow planting system with full covering (100%) of the soil surface with wheat straw mulch (RF 1 M 100 ). The RF 1 M 0 treatment could not increase sunflower yield, but the application of 50 and 100% wheat straw mulch significantly increased seed yield by10 and 18%, respectively. For both years and sites, on average the maximum seed yield was found with the RF 1 M 100 treatment (1629 kg ha −1 ), while the minimum value (1318 kg ha −1 ) was related to RF 0 M 0 treatment. Wheat straw mulching reduced soil temperature and increased soil water storage, organic C and microbial biomass C. We concluded that the ridge‐furrow planting system with full coverage of the soil surface with wheat straw mulch could be critical in the cultivation of sunflower under arid and semiarid areas, where water is the most important factor in determining plant growth and yield. Core Ideas Ridge‐furrow system promoted sunflower seed yield, applying straw mulch further increased yield. Improved sunflower yield was explained by optimized water supply and thermal balance. Wheat straw mulch could reduce risk of heat stress. Application of wheat straw mulching improved soil biological properties. The RF 1 M 100 effectively increased soil water storage and biomass accumulation.
Publisher: Elsevier BV
Date: 2013
Publisher: Wiley
Date: 10-01-2018
DOI: 10.1111/PBI.12867
Publisher: Informa UK Limited
Date: 2012
Publisher: Springer Science and Business Media LLC
Date: 22-02-2013
Publisher: MDPI AG
Date: 30-12-2020
Abstract: Plant–microbe interaction is a complex, dynamic and continuous process that is as old as plant colonization on Earth [...]
Location: Australia
Location: Australia
No related grants have been discovered for Aria Dolatabadian.