期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 111, 期 17, 页码 6497-6502出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1319955111
关键词
Ca2+ signaling; Yellow Cameleon; Two Pore Channel 1
资金
- National Science Foundation [NSF IOS-11213800, MCB-1329723]
- National Aeronautics and Space Administration [NNX09AK80G, NNX12AK79G]
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [1121380] Funding Source: National Science Foundation
- Div Of Molecular and Cellular Bioscience
- Direct For Biological Sciences [1329723] Funding Source: National Science Foundation
Their sessile lifestyle means that plants have to be exquisitely sensitive to their environment, integrating many signals to appropriate developmental and physiological responses. Stimuli ranging from wounding and pathogen attack to the distribution of water and nutrients in the soil are frequently presented in a localized manner but responses are often elicited throughout the plant. Such systemic signaling is thought to operate through the redistribution of a host of chemical regulators including peptides, RNAs, ions, metabolites, and hormones. However, there are hints of a much more rapid communication network that has been proposed to involve signals ranging from action and system potentials to reactive oxygen species. We now show that plants also possess a rapid stress signaling system based on Ca2+ waves that propagate through the plant at rates of up to similar to 400 mu m/s. In the case of local salt stress to the Arabidopsis thaliana root, Ca2+ wave propagation is channeled through the cortex and endodermal cell layers and this movement is dependent on the vacuolar ion channel TPC1. We also provide evidence that the Ca2+ wave/TPC1 system likely elicits systemic molecular responses in target organs and may contribute to whole-plant stress tolerance. These results suggest that, although plants do not have a nervous system, they do possess a sensory network that uses ion fluxes moving through defined cell types to rapidly transmit information between distant sites within the organism.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据