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Author Li S., Tian Y., Wu K., Ye Y., Yu J., Zhang J., Liu Q., Hu M., Li H., Tong Y., Harberd N.P., Fu X.
Title Modulating plant growth-metabolism coordination for sustainable agriculture.
Abstract:
Enhancing global food security by increasing the productivity of green revolution varieties of cereals risks increasing the collateral environmental damage produced by inorganic nitrogen fertilizers. Improvements in the efficiency of nitrogen use of crops are therefore essential; however, they require an in-depth understanding of the co-regulatory mechanisms that integrate growth, nitrogen assimilation and carbon fixation. Here we show that the balanced opposing activities and physical interactions of the rice GROWTH-REGULATING FACTOR 4 (GRF4) transcription factor and the growth inhibitor DELLA confer homeostatic co-regulation of growth and the metabolism of carbon and nitrogen. GRF4 promotes and integrates nitrogen assimilation, carbon fixation and growth, whereas DELLA inhibits these processes. As a consequence, the accumulation of DELLA that is characteristic of green revolution varieties confers not only yield-enhancing dwarfism, but also reduces the efficiency of nitrogen use. However, the nitrogen-use efficiency of green revolution varieties and grain yield are increased by tipping the GRF4-DELLA balance towards increased GRF4 abundance. Modulation of plant growth and metabolic co-regulation thus enables novel breeding strategies for future sustainable food security and a new green revolution.
Journal Nature
Country China
Volume 560(7720)
Pages 595-600
Year 2018
PubMed ID 30111841
PubMed Central ID 6155485
DOI 10.1038/s41586-018-0415-5
URL -
Relation
Gene AMT1;1 AMT1;2 CAB1R CDKB2;1 CYCA1;1 DYE1 GIF3 GLN1;2 GLT2 GS2 GS2 LHCA1 LHCA3 PSAD PSAE PSBS1 SD1 SLR1 SWEET12 TPP1 TPS1 XA13 _
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Stages in Each Organ
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Cultivated Varieties(NIG Collection) -
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