气候变化领域集成服务门户(CCPortal): Evidence for root adaptation to a spatially discontinuous water availability in the absence of external water potential gradients

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DOI	10.1073/pnas.2012892118
	Evidence for root adaptation to a spatially discontinuous water availability in the absence of external water potential gradients
	Lind K.R.; Siemianowski O.; Yuan B.; Sizmur T.; Van Every H.; Banerjee S.; Cademartiri L.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:1
英文摘要	We hereby show that root systems adapt to a spatially discontinuous pattern of water availability even when the gradients of water potential across them are vanishingly small. A paper microfluidic approach allowed us to expose the entire root system of Brassica rapa plants to a square array of water sources, separated by dry areas. Gradients in the concentration of water vapor across the root system were as small as 10-4·mM·m-1(∼4 orders of magnitude smaller than in conventional hydrotropism assays). Despite such minuscule gradients (which greatly limit the possible influence of the well-understood gradient-driven hydrotropic response), our results show that 1) individual roots as well as the root system as a whole adapt to the pattern of water availability to maximize access to water, and that 2) this adaptation increases as water sources become more rare. These results suggest that either plant roots are more sensitive to water gradients than humanmade water sensors by 3-5 orders of magnitude, or they might have developed, like other organisms, mechanisms forwater foraging that allow them to findwater in the absence of an external gradient in water potential. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Hydrotropism; Paper microfluidics; Root phenotyping; Water stress
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160676
作者单位	Lind, K.R., Department of Materials Science & Engineering, Iowa State University of Science and Technology, Ames, IA 50011, United States; Siemianowski, O., Department of Materials Science & Engineering, Iowa State University of Science and Technology, Ames, IA 50011, United States; Yuan, B., Department of Chemical & Biological Engineering, Iowa State University of Science and Technology, Ames, IA 50011, United States; Sizmur, T., Department of Materials Science & Engineering, Iowa State University of Science and Technology, Ames, IA 50011, United States; Van Every, H., Department of Materials Science & Engineering, Iowa State University of Science and Technology, Ames, IA 50011, United States; Banerjee, S., Department of Materials Science & Engineering, Iowa State University of Science and Technology, Ames, IA 50011, United States; Cademartiri, L., Department of Materials Science & Engineering, Iowa State University of Science and Technology, Ames, IA 50011, United States, Department of Chemical &...
推荐引用方式 GB/T 7714	Lind K.R.,Siemianowski O.,Yuan B.,et al. Evidence for root adaptation to a spatially discontinuous water availability in the absence of external water potential gradients[J],2021,118(1).
APA	Lind K.R..,Siemianowski O..,Yuan B..,Sizmur T..,Van Every H..,...&Cademartiri L..(2021).Evidence for root adaptation to a spatially discontinuous water availability in the absence of external water potential gradients.Proceedings of the National Academy of Sciences of the United States of America,118(1).
MLA	Lind K.R.,et al."Evidence for root adaptation to a spatially discontinuous water availability in the absence of external water potential gradients".Proceedings of the National Academy of Sciences of the United States of America 118.1(2021).