Rewiring of jasmonate and phytochrome B signalling uncouples plant growth-defense tradeoffs [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 570 Life sciences Biology
• Thông tin xuất bản: Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2016
• Mô tả vật lý: Size: Article No. 12570 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 260739
• Chủ đề: 1. 60 applied life sciences; 2. Herbivory; 3. Jasmonic acid; 4. Light responses; 5. Plant signalling

Tóm tắt

 Plants resist infection and herbivory with innate immune responses that are often associated with reduced growth. Despite the importance of growth-defense tradeoffs in shaping plant productivity in natural and agricultural ecosystems, the molecular mechanisms that link growth and immunity are poorly understood. Here, we demonstrate that growth-defense tradeoffs mediated by the hormone jasmonate are uncoupled in an <
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  mutant (<
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 ) lacking a quintet of Jasmonate ZIM-domain transcriptional repressors and the photoreceptor phyB. Analysis of epistatic interactions between <
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  and <
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  reveal that growth inhibition associated with enhanced anti-insect resistance is likely not caused by diversion of photoassimilates from growth to defense but rather by a conserved transcriptional network that is hardwired to attenuate growth upon activation of jasmonate signalling. Furthermore, the ability to unlock growth-defense tradeoffs through relief of transcription repression provides an approach to assemble functional plant traits in new and potentially useful ways.