Are plants wasting water in the dark? This project aims to measure stomatal conductance to water vapour in the dark in economically important species to understand how conductance is regulated in the dark, and its adaptive significance. Leaves of most plants continue to lose water in the dark because stomata remain open. No photosynthetic carbon fixation can occur in the dark so water-use efficiency is reduced, and this reduction influences crop yield, forest growth, catchment water yield and c ....Are plants wasting water in the dark? This project aims to measure stomatal conductance to water vapour in the dark in economically important species to understand how conductance is regulated in the dark, and its adaptive significance. Leaves of most plants continue to lose water in the dark because stomata remain open. No photosynthetic carbon fixation can occur in the dark so water-use efficiency is reduced, and this reduction influences crop yield, forest growth, catchment water yield and climate feedback. Existing mechanistic models of stomatal conductance will be extended to include responses in the dark, and aim to be used to predict the reduction in potential daytime water loss (which is coupled to carbon gain) due to nocturnal stomatal conductance for crops and forests.Read moreRead less
Leaves in 3D: photosynthesis and water-use efficiency. This project aims to develop leaf anatomical ideotypes with improved photosynthesis and water-use efficiency for wheat, rice, chickpea and cotton using novel three dimensional imaging and modelling techniques. This project expects to generate new understanding of the role of leaf anatomy on leaf function. Expected outcomes of this project include the world's first 3D spatially-explicit, anatomically accurate model of leaves of crop plants to ....Leaves in 3D: photosynthesis and water-use efficiency. This project aims to develop leaf anatomical ideotypes with improved photosynthesis and water-use efficiency for wheat, rice, chickpea and cotton using novel three dimensional imaging and modelling techniques. This project expects to generate new understanding of the role of leaf anatomy on leaf function. Expected outcomes of this project include the world's first 3D spatially-explicit, anatomically accurate model of leaves of crop plants to allow virtual experiments identifying optimized anatomy for improved photosynthetic performance. Benefits to the agricultural industry include increased crop productivity and water-use efficiency to meet future global food demand and to make the most of Australia's limited water resourcesRead moreRead less
Regulation of seed development in grain legumes. The seeds of grain legumes are the edible portion of the crop, but it is not understood how seed size and composition are regulated. This project will determine the mechanisms by which plant hormones affect seed development, providing a basis for improving yields.
Hormonal regulation of plant growth. Plant architecture is a key characteristic in determining crop success. This project will determine how plant architecture is regulated by plant hormones and their interactions, to ensure optimal adaptation of crops to environmental and agronomic changes.
Genetic control of flowering in legumes. Flowering in plants is strongly regulated by environmental factors, with important consequences for their natural distribution and use in agriculture. This project will isolate genes, characterize genetic diversity and dissect molecular mechanisms that regulate flowering, contributing to fundamental biology, crop improvement and research training.
Discovering the activity of novel CLE peptide hormones that regulate legume nodulation. This project aims to functionally characterise novel peptide hormones that regulate the number of nitrogen-fixing root nodules that legumes form. Findings will enhance the current nodulation model and could help to alleviate our reliance on expensive, often polluting, nitrogen-fertilisers by helping to optimise the nodulation process in agriculture.
Discovery of the systemic regulator of legume nodulation. This project aims to discover the novel, shoot-derived factor that legumes produce to regulate the number of nitrogen-fixing root nodules they form. Outcomes will enhance the current nodulation model and could help optimise the process in agriculture, which would help alleviate current reliance on nitrogen-fertilisers that are expensive and pollute.
Clocks in crops: exploring the role of circadian rhythms in crop adaptation. The project aims to analyse how the circadian clock provides adaptive advantages in legumes and cereals, two major crop groups of global importance. The project expects to produce new fundamental knowledge about how the clock in these crops coordinates their development, physiology, and metabolism in response to environmental cues. The anticipated outcome is a better understanding of key similarities and differences in ....Clocks in crops: exploring the role of circadian rhythms in crop adaptation. The project aims to analyse how the circadian clock provides adaptive advantages in legumes and cereals, two major crop groups of global importance. The project expects to produce new fundamental knowledge about how the clock in these crops coordinates their development, physiology, and metabolism in response to environmental cues. The anticipated outcome is a better understanding of key similarities and differences in clock functions in different species. Another is knowledge of how the ancient clock gene variants still in use today may limit the current or future performance of those crops. This will provide significant benefits, such as to improve productivity of crop plants in diverse and changing environments.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
Improving grain legume seeds for future climates. Grain legumes are essential for sustainable agriculture and human dietary protein, but seed quality is predicted to decline under future scenarios of high CO2 and warmer temperatures. This project aims to improve legume seed quality under future climates by comparing metabolites and physiological traits of chickpea and other legumes to establish mechanisms by which legumes maximise seed nutrient allocation. The anticipated outcomes include new me ....Improving grain legume seeds for future climates. Grain legumes are essential for sustainable agriculture and human dietary protein, but seed quality is predicted to decline under future scenarios of high CO2 and warmer temperatures. This project aims to improve legume seed quality under future climates by comparing metabolites and physiological traits of chickpea and other legumes to establish mechanisms by which legumes maximise seed nutrient allocation. The anticipated outcomes include new metabolite-based breeding markers for the improvement of crops with higher seed proteins, micronutrients and bioactive compounds that are adapted to future climates. Seed nutrient improvement will also include increased biological nitrogen fixation to reduce the need for chemical nitrogen fertilisers.Read moreRead less