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Field based molecular diagnostics for identification of plant parasitic nematodes. Nematodes are economically important pests of many agricultural and commercially grown plants. We have shown 'proof-of-concept' that plant parasitic nematodes can be identified by protein profiling using MALDI-TOF mass spectroscopy. In this project advanced techniques of proteomics and associated bioinformatics will be used to identify, isolate and characterise proteins that are specific to economically important ....Field based molecular diagnostics for identification of plant parasitic nematodes. Nematodes are economically important pests of many agricultural and commercially grown plants. We have shown 'proof-of-concept' that plant parasitic nematodes can be identified by protein profiling using MALDI-TOF mass spectroscopy. In this project advanced techniques of proteomics and associated bioinformatics will be used to identify, isolate and characterise proteins that are specific to economically important nematode species and races, and to identify diagnostic proteins or epitopes. The diagnostic proteins will be used to generate specific monoclonal antibodies that will be incorporated into immunochemical 'Lateral Flow' devices. These will provide on-site tests to identify nematodes for growers and quarantine services. Read moreRead less
Combinatorial controlled gene expression delivering crops resistant to nematodes. Root-knot nematodes cause US$130 billion crop losses worldwide pa, and at least AUS$ 450 pa in Australia. Current control methods involve fumigation, chemicals (mainly carbamates and organophosphates), natural plant resistance and biological control. The fumigants (eg methyl bromide) are being phased out because they damage the ozone layer, most of the non-fumigants are being banned because of environmental damag ....Combinatorial controlled gene expression delivering crops resistant to nematodes. Root-knot nematodes cause US$130 billion crop losses worldwide pa, and at least AUS$ 450 pa in Australia. Current control methods involve fumigation, chemicals (mainly carbamates and organophosphates), natural plant resistance and biological control. The fumigants (eg methyl bromide) are being phased out because they damage the ozone layer, most of the non-fumigants are being banned because of environmental damage and persistence in groundwater, and biological control has had limited success. These problems are addressed in this project with development of synthetic plant resistance to nematodes, which will benefit horticultural and broadacre farming by reducing pathogen losses and improving quality.Read moreRead less
Role of soil factors and transmission on propagation material of fungal pathogens in the severity of strawberry crown and root disorders. Through identification of the pathogen complexes associated with root and crown disorders, their impacts, understanding the influences of environmental conditions and rotational species, knowing the sources of major pathogens, and identification of varietal resistances to the pathogens, this project will provide a unique opportunity for growers to better manag ....Role of soil factors and transmission on propagation material of fungal pathogens in the severity of strawberry crown and root disorders. Through identification of the pathogen complexes associated with root and crown disorders, their impacts, understanding the influences of environmental conditions and rotational species, knowing the sources of major pathogens, and identification of varietal resistances to the pathogens, this project will provide a unique opportunity for growers to better manage such disorders of strawberries occurring across southern Australia. Benefits include prevention of severe losses in strawberries, making strawberry production and exports more viable, sustainable and environmentally friendly, addressing the National Research Priority 'An Environmentally Sustainable Australia' and the Priority Goal of 'Transforming existing industries".Read moreRead less
The biology, genetics, pathology and control of Alternaria species in Paulownia plantations. The development of Paulownia plantations is a rapidly expanding industry in Australia. Recently, three Alternaria species have been associated with foliar and canker disease leading to tree deaths. Alternaria disease has the potential to cause economic losses to the industry in Western Australia. Therefore, this study will examine the pathology and genetic diversity of Alternaria species, establish path ....The biology, genetics, pathology and control of Alternaria species in Paulownia plantations. The development of Paulownia plantations is a rapidly expanding industry in Australia. Recently, three Alternaria species have been associated with foliar and canker disease leading to tree deaths. Alternaria disease has the potential to cause economic losses to the industry in Western Australia. Therefore, this study will examine the pathology and genetic diversity of Alternaria species, establish pathogenicity screening of different genetic material and look at a range of integrated chemical and silvicultural approaches to reduce disease impact and severity.Read moreRead less
The response of mitochondria to oxidative stress in plants. Crops encounter many situations in their environment which place them under stress. Reactive oxygen molecules produced in these situations act as messengers to trigger defence mechanisms but also cause cellular damage. Mitochondria are the subcellular compartments involved in energy production and are essential for plant development and growth. However, they also have been implicated in the response of plants to stress and pathogen atta ....The response of mitochondria to oxidative stress in plants. Crops encounter many situations in their environment which place them under stress. Reactive oxygen molecules produced in these situations act as messengers to trigger defence mechanisms but also cause cellular damage. Mitochondria are the subcellular compartments involved in energy production and are essential for plant development and growth. However, they also have been implicated in the response of plants to stress and pathogen attack, and in production of reactive oxygen molecules. This proposal seeks to investigate how mitochondria are involved in these processes, focusing on the role of terminal oxidases. Potential outcomes include crops better able to cope with environmental stress.Read moreRead less
Biosynthesis and functions of two phytotoxins in Septoria nodorum blotch. This project aims to investigate how a fungal plant pathogen makes and uses small bioactive molecules to facilitate infection. It will characterise the function of the genes and enzymes involved in the biosynthesis of a light-activated phytotoxic molecule and a potential anti-plant defence molecule found in the pathogenic wheat fungus Parastagonospora nodorum, and investigate their contribution to disease development. Expe ....Biosynthesis and functions of two phytotoxins in Septoria nodorum blotch. This project aims to investigate how a fungal plant pathogen makes and uses small bioactive molecules to facilitate infection. It will characterise the function of the genes and enzymes involved in the biosynthesis of a light-activated phytotoxic molecule and a potential anti-plant defence molecule found in the pathogenic wheat fungus Parastagonospora nodorum, and investigate their contribution to disease development. Expected outcomes include better understanding of plant-microbe interactions, disease management strategies, technologies for identifying biosynthetic pathways in other fungi, and enzyme technology for synthesising molecules. This could lead to new herbicides, biopesticides and drugs.Read moreRead less
Fungal Ribosomally Synthesised and Post-translationally Modified Peptides. Fungi produce an array of molecules called secondary metabolites (SMs) that impact on everyday life (e.g. penicillin). This project aims to investigate a new class of fungal peptide SMs called RiPPs which are structurally unique from existing molecules and offer the exciting prospect of harbouring new and novel biological activities. This project expects to discover the mechanisms of RiPP synthesis and their biological ro ....Fungal Ribosomally Synthesised and Post-translationally Modified Peptides. Fungi produce an array of molecules called secondary metabolites (SMs) that impact on everyday life (e.g. penicillin). This project aims to investigate a new class of fungal peptide SMs called RiPPs which are structurally unique from existing molecules and offer the exciting prospect of harbouring new and novel biological activities. This project expects to discover the mechanisms of RiPP synthesis and their biological roles in plant pathogenic fungi, and uncover and engineer novel RiPPs with desired bioactivities. The expected outcome from this project will be a seminal advance in fungal SM biology which should provide significant benefits through the generation of exciting new lead molecules for the agricultural and medical industries.Read moreRead less
Molecular characterisation of the fungal disease defence response in tropical sandalwood (Santalum album). The tropical sandalwood industry in Australia is a highly profitable and expanding enterprise; however this cannot be taken for granted. Fungal diseases in tropical plantations are of increasing concern to growers and left unchecked could result in substantial economic loss and an unsustainable industry. This research seeks to understand the defence response of the tree in order to develop ....Molecular characterisation of the fungal disease defence response in tropical sandalwood (Santalum album). The tropical sandalwood industry in Australia is a highly profitable and expanding enterprise; however this cannot be taken for granted. Fungal diseases in tropical plantations are of increasing concern to growers and left unchecked could result in substantial economic loss and an unsustainable industry. This research seeks to understand the defence response of the tree in order to develop tools to combat fungal disease by rapid selection of highly resistant trees. Essential oil production is also linked to the defence response. Understanding this response as well as exploring chemical means of increasing both disease resistance and oil production will deliver a substantial economic benefit to the expanding tropical sandalwood industry.Read moreRead less
Eucalyptus gomphocephela (tuart) decline in Western Australia. The decline and death of tuart forest in Western Australia is spectacular, widespread and a significant threat to biodiversity. There is widespread concern and political pressure because of diverse landuse pressures, yet it remains poorly understood and no remedial action is available. This project will attempt to determine the causes by examining predisposing factors (hydrological, salinity, nutrition, fire) and their interaction wi ....Eucalyptus gomphocephela (tuart) decline in Western Australia. The decline and death of tuart forest in Western Australia is spectacular, widespread and a significant threat to biodiversity. There is widespread concern and political pressure because of diverse landuse pressures, yet it remains poorly understood and no remedial action is available. This project will attempt to determine the causes by examining predisposing factors (hydrological, salinity, nutrition, fire) and their interaction with pests and diseases, and the remedial actions necessary. On the basis of these results, propose an action plan so land managers and community groups can arrest and reverse tuart decline.Read moreRead less
DNA Method for Detection of Phytophthora cinnamomi in Soil and Plant Material. The need to impose strict quarantine procedures to prevent the spread of Jarrah Dieback disease hampers the activities of the mining, tourism, wildflower, nursery, and bee keeping industries. These procedures are time consuming and require a high degree of technical expertise. They result in false negatives facilitating the spread of the disease in asymptomatic material. This project will develop a DNA test for detec ....DNA Method for Detection of Phytophthora cinnamomi in Soil and Plant Material. The need to impose strict quarantine procedures to prevent the spread of Jarrah Dieback disease hampers the activities of the mining, tourism, wildflower, nursery, and bee keeping industries. These procedures are time consuming and require a high degree of technical expertise. They result in false negatives facilitating the spread of the disease in asymptomatic material. This project will develop a DNA test for detection of the pathogen in soil and plant material to make detection easier, quicker, and specific. The outcomes will be a test for detection of the dieback pathogen and technology to detect pathogens in soil samples.Read moreRead less