4.4 Article

Plant responses to limited aeration: Advances and future challenges

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PLANT DIRECT
卷 7, 期 3, 页码 -

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JOHN WILEY & SONS LTD
DOI: 10.1002/pld3.488

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aerenchyma; ethylene; fermentation; flooding; hypoxia; mitochondria

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Limited aeration caused by various factors poses challenges to plants and is associated with low oxygen. The International Society for Plant Anaerobiosis (ISPA) gathers researchers worldwide to study the causes and consequences of limited aeration in plants. The 14th ISPA meeting focused on the evolution and regulation of O2 sensing mechanisms and highlighted the new roles of low O2 and limited aeration in altitude adaptation, fruit development and storage, and vegetative development.
Limited aeration that is caused by tissue geometry, diffusion barriers, high elevation, or a flooding event poses major challenges to plants and is often, but not exclusively, associated with low oxygen. These processes span a broad interest in the research community ranging from whole plant and crop responses, post-harvest physiology, plant morphology and anatomy, fermentative metabolism, plant developmental processes, oxygen sensing by ERF-VIIs, gene expression profiles, the gaseous hormone ethylene, and O-2 dynamics at cellular resolution. The International Society for Plant Anaerobiosis (ISPA) gathers researchers from all over the world contributing to understand the causes, responses, and consequences of limited aeration in plants. During the 14th ISPA meeting, major research progress was related to the evolution of O-2 sensing mechanisms and the intricate network that balances low O2 signaling. Here, the work moved beyond flooding stress and emphasized novel underexplored roles of low O2 and limited aeration in altitude adaptation, fruit development and storage, and the vegetative development of growth apices. Regarding tolerance towards flooding, the meeting stressed the relevance and regulation of developmental plasticity, aerenchyma, and barrier formation to improve internal aeration. Additional newly explored flood tolerance traits concerned resource balance, senescence, and the exploration of natural genetic variation for novel tolerance loci. In this report, we summarize and synthesize the major progress and future challenges for low O-2 and aeration research presented at the conference.

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