Decoding the signals in legume symbioses: investigating the role of plant hormones. Plants form intimate relationships with soil microbes that give plants access to previously unavailable but essential nutrients. Legumes are major Australian crops for fodder, grain and nutrients, and are unique in forming symbioses with both nitrogen-fixing bacteria and with mycorrhizal fungi that supply nutrients such as phosphate. This project aims to determine the role of plant hormones (small, mobile, potent ....Decoding the signals in legume symbioses: investigating the role of plant hormones. Plants form intimate relationships with soil microbes that give plants access to previously unavailable but essential nutrients. Legumes are major Australian crops for fodder, grain and nutrients, and are unique in forming symbioses with both nitrogen-fixing bacteria and with mycorrhizal fungi that supply nutrients such as phosphate. This project aims to determine the role of plant hormones (small, mobile, potent growth regulators) in the formation of these relationships. In particular, the role of interactions between hormones and other novel plant signals will be determined. An insight into the common and divergent roles of hormones in these symbioses is essential to provide new tools to maximise nutrient acquisition.Read moreRead less
Unique plant hormone responses: the key to nitrogen-fixing nodules. This project aims to build a model of the signals that regulate root nodule formation, unique root organs formed by some plants that host nitrogen-fixing bacteria. Nitrogen is often limited in the soil and agriculture relies on nitrogen fertiliser. Sustainable sources of plant nutrients are required to ensure food security and minimise the environmental impact of intensive farming. This project will provide fundamental informati ....Unique plant hormone responses: the key to nitrogen-fixing nodules. This project aims to build a model of the signals that regulate root nodule formation, unique root organs formed by some plants that host nitrogen-fixing bacteria. Nitrogen is often limited in the soil and agriculture relies on nitrogen fertiliser. Sustainable sources of plant nutrients are required to ensure food security and minimise the environmental impact of intensive farming. This project will provide fundamental information on why some species can form nitrogen-fixing nodules by examining the role of plant hormones. This will build the knowledge base required to potentially expand this symbiosis into non-legumes, harnessing the huge advantage nodule forming species have in staple crops.Read moreRead less
The role of plant hormones in legume symbioses. Soil microbes can give plants access to previously unavailable but essential nutrients through symbioses. Legumes are unique as they form symbioses with both nitrogen-fixing bacteria and with mycorrhizal fungi that supply nutrients such as phosphate. This proposal will investigate the role of the plant hormones (small, mobile, potent growth regulators) in the formation of these symbiotic relationships across legume genera. An insight into the commo ....The role of plant hormones in legume symbioses. Soil microbes can give plants access to previously unavailable but essential nutrients through symbioses. Legumes are unique as they form symbioses with both nitrogen-fixing bacteria and with mycorrhizal fungi that supply nutrients such as phosphate. This proposal will investigate the role of the plant hormones (small, mobile, potent growth regulators) in the formation of these symbiotic relationships across legume genera. An insight into the common and divergent roles of hormones in these symbioses is essential to provide researchers and breeders with new tools to maximise nutrient acquisition by legumes, important crops contributing an estimated one billion Australian dollars per year to the Australian economy.Read moreRead less
Understanding the biological functions of the karrikin-responsive signaling system of plants in growth, development and responses to the environment. A new signalling system in plants, related to that of strigolactone hormones but evolutionarily more ancient and functionally distinct, has been discovered. It is defined by the Karrkin-Insensitive-2 (KAI2) protein discovered by its ability to confer responsiveness to karrikins from bushfires. The KAI2 system influences seed germination, and develo ....Understanding the biological functions of the karrikin-responsive signaling system of plants in growth, development and responses to the environment. A new signalling system in plants, related to that of strigolactone hormones but evolutionarily more ancient and functionally distinct, has been discovered. It is defined by the Karrkin-Insensitive-2 (KAI2) protein discovered by its ability to confer responsiveness to karrikins from bushfires. The KAI2 system influences seed germination, and development of seedlings, leaves and potentially roots. This project will use KAI2 mutants and transgenic plants to define the biological functions of KAI2 signalling, and its interactions with other signalling systems. New genes central to KAI2 signalling and responses will be identified for functional analysis. The research will reveal the significance of this new signalling system in plant biology. Read moreRead less