Unsaturation of vapour pressure inside leaves: fundamental, but unknown. This project aims to determine when and to what extent the air inside leaves becomes unsaturated with water vapour. All current interpretation and modelling of leaf gas exchange assumes saturation under all circumstances. Compelling evidence has been obtained that suggests this is not true under moderate air vapour pressure deficits. A novel technique will be employed to assess the water vapour concentration of the air insi ....Unsaturation of vapour pressure inside leaves: fundamental, but unknown. This project aims to determine when and to what extent the air inside leaves becomes unsaturated with water vapour. All current interpretation and modelling of leaf gas exchange assumes saturation under all circumstances. Compelling evidence has been obtained that suggests this is not true under moderate air vapour pressure deficits. A novel technique will be employed to assess the water vapour concentration of the air inside leaves based on stable isotope analysis of carbon dioxide and water vapour exchanged between leaves and air. The project is expected to provide fundamental knowledge about how stomata regulate photosynthesis and water use, with significant implications for modelling vegetation function and for improving the performance of crop plants.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE130101760
Funder
Australian Research Council
Funding Amount
$374,000.00
Summary
Uncovering the roles of key ribonucleases critical for post-transcriptional control of chloroplast gene expression. Higher plant chloroplasts harbour key biological processes that are essential to life on earth. Deciphering the roles of important plastid-targeted ribonucleases, central to post-transcriptional ribonucleic acid (RNA) processing events, is crucial to elucidate the genetic elements required to engineer chloroplast metabolic pathways to enhance productive crop yields.
Pathogen recognition and plant-defence activation by a novel Fusarium wilt-resistance protein from tomato. The devastating effects of Fusarium wilt disease of tomato is a threat to one of Australia's most economically important horticultural crops. Resistant tomato varieties offer the most effective means of control but the fundamental mechanisms underlying this resistance are yet to be understood. This research will increase our understanding of resistance to Fusarium wilt disease. The knowledg ....Pathogen recognition and plant-defence activation by a novel Fusarium wilt-resistance protein from tomato. The devastating effects of Fusarium wilt disease of tomato is a threat to one of Australia's most economically important horticultural crops. Resistant tomato varieties offer the most effective means of control but the fundamental mechanisms underlying this resistance are yet to be understood. This research will increase our understanding of resistance to Fusarium wilt disease. The knowledge gained will assist in the development of new robust, sustainable approaches to disease control, as well as the development of pre-emptive strategies to avert major outbreaks, which will ensure reliable productivity and minimal economic losses into the future.Read moreRead less
Translocation of secreted effector proteins from fungal pathogens into host plant cells. Every year, fungal diseases of plants cause huge losses in agricultural productivity and extensive environmental damage in Australia. Disease control in major crops, like wheat, currently relies heavily on breeding for disease resistance. However, fungal pathogens continually adapt to overcome plant defences, necessitating identification of new sources of resistance. The research in this project will eluc ....Translocation of secreted effector proteins from fungal pathogens into host plant cells. Every year, fungal diseases of plants cause huge losses in agricultural productivity and extensive environmental damage in Australia. Disease control in major crops, like wheat, currently relies heavily on breeding for disease resistance. However, fungal pathogens continually adapt to overcome plant defences, necessitating identification of new sources of resistance. The research in this project will elucidate the molecular basis of a new aspect of the establishment of plant infection by fungi, and in so doing will provide new avenues for the development of novel disease resistance strategies, with relevance in particular to devastating cereal diseases like wheat rust.Read moreRead less
Role of fungal secreted proteins as plant disease effectors. Many crop diseases are economically significant threats to agricultural productivity in Australia, with rust fungi in particular being a major problem for cereal grain production. Current methods of rust disease control are based on breeding for resistance but continued adaption by rust fungi to overcome plant defences means there is an urgent need for new methods of crop protection. This project will investigate molecular processes ....Role of fungal secreted proteins as plant disease effectors. Many crop diseases are economically significant threats to agricultural productivity in Australia, with rust fungi in particular being a major problem for cereal grain production. Current methods of rust disease control are based on breeding for resistance but continued adaption by rust fungi to overcome plant defences means there is an urgent need for new methods of crop protection. This project will investigate molecular processes underlying fungal infection of plants, focusing on mechanisms that enable fungi to take over the metabolism of infected cells. The research will provide basic knowledge for development of novel and durable disease resistance strategies.Read moreRead less
Will stomatal responses to humidity and carbon dioxide constrain tropical forest productivity as atmospheric carbon dioxide rises? This project will investigate two physiological processes that will partly determine growth responses of tropical forest trees to rising atmospheric carbon dioxide. The project will produce equations summarising physiological responses that can be incorporated into process-based models of tropical forest productivity.
Reading the isotopic archive: carbon and oxygen stable isotope ratios as recorders of plant physiological processes. This project will investigate how plant physiological processes are reflected in stable isotope ratios of carbon and oxygen in plant tissues. Results will contribute towards a mechanistic understanding of the processes that cause isotopic modifications, thereby enabling an improved interpretation of naturally occurring stable isotope signals.
New functions for bioactive flavonoids in plants and mammals. We have discovered natural products with biological activity in plants and mammals. These molecules affect plant shape and development and the process of mammalian blood vessel formation. We seek to understand how these molecules work. More understanding is required before one can begin to utilise these molecules for possible beneficial agriculture or human health outcomes. Plant shape influences such things as yield or more drought-r ....New functions for bioactive flavonoids in plants and mammals. We have discovered natural products with biological activity in plants and mammals. These molecules affect plant shape and development and the process of mammalian blood vessel formation. We seek to understand how these molecules work. More understanding is required before one can begin to utilise these molecules for possible beneficial agriculture or human health outcomes. Plant shape influences such things as yield or more drought-resilient root systems. Importantly, we have discovered specific molecules that either promote or inhibit blood vessel formation. A better understanding of how these molecules work could lead to novel treatments for cancer or cardiovascular disease.Read moreRead less
Targeting of lipid transfer proteins and other secreted plant defence proteins by pathogen effectors. Australia depends on plant products for much of its export income and plant diseases are a continual threat to these earnings. New insights into plant disease resistance mechanisms will provide new opportunities to find solutions to disease problems. Often this involves transfer of knowledge gained in simple model plant systems to more complicated crop plant systems. Work on the role of lipid tr ....Targeting of lipid transfer proteins and other secreted plant defence proteins by pathogen effectors. Australia depends on plant products for much of its export income and plant diseases are a continual threat to these earnings. New insights into plant disease resistance mechanisms will provide new opportunities to find solutions to disease problems. Often this involves transfer of knowledge gained in simple model plant systems to more complicated crop plant systems. Work on the role of lipid transfer proteins in the tomato model system will advance our knowledge of fundamental disease and disease resistance processes and ultimately enable technological innovations to improve disease resistance, reduce pesticide usage and lower crop production costs.Read moreRead less