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Mechanisms of arsenic tolerance in plants: how do symbiotic arbuscular mycorrhizal (AM) fungi reduce uptake? Arsenic contamination of soil is a major problem caused by irrigation with contaminated ground-water, mining and application of pesticides. Plant uptake leads to entry into food chains, with severe consequences for crop growth and human health. This project will aid the search for mechanisms to reduce plant arsenic accumulation by exploring roles of beneficial plant-fungus symbioses in r ....Mechanisms of arsenic tolerance in plants: how do symbiotic arbuscular mycorrhizal (AM) fungi reduce uptake? Arsenic contamination of soil is a major problem caused by irrigation with contaminated ground-water, mining and application of pesticides. Plant uptake leads to entry into food chains, with severe consequences for crop growth and human health. This project will aid the search for mechanisms to reduce plant arsenic accumulation by exploring roles of beneficial plant-fungus symbioses in reducing uptake. Results will be relevant to most crop plants, because of the widespread occurrence of the symbioses. The project will enhance collaboration with China where arsenic toxicity is prevalent, provide education and training in an internationally recognised laboratory and enhance Australia's reputation for tackling soil contamination.Read moreRead less
Crops for a phosphorus-scarce future: plant adaptation to fluctuating phosphorus availability. Phosphorus is commonly used on farmland to ensure high yields. However, rock phosphate reserves are declining and leaching of phosphorus from farmlands into native vegetation and water bodies causes significant environmental degradation. As a result, more phosphorus-efficient farming systems are urgently required. Many Australian native plants have adapted to low phosphorus soils and fast fluctuations ....Crops for a phosphorus-scarce future: plant adaptation to fluctuating phosphorus availability. Phosphorus is commonly used on farmland to ensure high yields. However, rock phosphate reserves are declining and leaching of phosphorus from farmlands into native vegetation and water bodies causes significant environmental degradation. As a result, more phosphorus-efficient farming systems are urgently required. Many Australian native plants have adapted to low phosphorus soils and fast fluctuations in phosphorus availability. This project aims to investigate plant adaptations to phosphorus fluctuations and the potential for storing phosphorus when it is abundant for later use. This should aid development of crops with improved phosphorus fertiliser-use efficiency in anticipation of a phosphorus-scarce future.Read moreRead less
The contribution of beneficial arbuscular mycorrhizal (AM) fungi to sustainable tomato production in Australia. Formation of beneficial arbuscular mycorrhiza (AM) by processing tomatoes has been used as an indicator of 'healthy soil' in an environmental monitoring audit of the industry in southern Australia, but field occurrence of the AM fungi and their potential contribution to tomato nutrition and productivity are not well understood. We will determine the responsiveness of widely-grown tomat ....The contribution of beneficial arbuscular mycorrhizal (AM) fungi to sustainable tomato production in Australia. Formation of beneficial arbuscular mycorrhiza (AM) by processing tomatoes has been used as an indicator of 'healthy soil' in an environmental monitoring audit of the industry in southern Australia, but field occurrence of the AM fungi and their potential contribution to tomato nutrition and productivity are not well understood. We will determine the responsiveness of widely-grown tomato varieties to AM inoculation and relate colonisation in the field to farming practices. The results will determine the potential benefits of AM fungi to tomato crops, in the context of development of environmentally and economically sustainable practices both in Australia and overseas. Read moreRead less
Using defined biotic and abiotic stimuli to dissect patterns of gene expression and protein accumulation that specify root architecture. Root morphogenesis is fundamental to agriculture and valuable for investigating the informational networks of genes, proteins and metabolites that control root growth and plant development. Root systems vary widely both within and between species. Root morphology is directed by a basic genetic program that is influenced by environmental factors to provide an e ....Using defined biotic and abiotic stimuli to dissect patterns of gene expression and protein accumulation that specify root architecture. Root morphogenesis is fundamental to agriculture and valuable for investigating the informational networks of genes, proteins and metabolites that control root growth and plant development. Root systems vary widely both within and between species. Root morphology is directed by a basic genetic program that is influenced by environmental factors to provide an enormous "phenotypic plasticity". This project will use two model plant systems to investigate how different external signals are "translated" by the plant into different developmental regimes. This knowledge is crucial to understanding how the plasticity of root development is modulated in response to changing environmental factors.Read moreRead less