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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erab100
|2 doi
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|a pubmed24n1074.xml
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|a (DE-627)NLM322348439
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|a (NLM)33677600
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Domec, Jean-Christophe
|e verfasserin
|4 aut
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| 245 |
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|a Aquaporins, and not changes in root structure, provide new insights into physiological responses to drought, flooding, and salinity
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 09.07.2021
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|a Date Revised 09.07.2021
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|a published: Print
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|a Citation Status MEDLINE
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|a © The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.
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|a The influence of aquaporin (AQP) activity on plant water movement remains unclear, especially in plants subject to unfavorable conditions. We applied a multitiered approach at a range of plant scales to (i) characterize the resistances controlling water transport under drought, flooding, and flooding plus salinity conditions; (ii) quantify the respective effects of AQP activity and xylem structure on root (Kroot), stem (Kstem), and leaf (Kleaf) conductances; and (iii) evaluate the impact of AQP-regulated transport capacity on gas exchange. We found that drought, flooding, and flooding plus salinity reduced Kroot and root AQP activity in Pinus taeda, whereas Kroot of the flood-tolerant Taxodium distichum did not decline under flooding. The extent of the AQP control of transport efficiency varied among organs and species, ranging from 35-55% in Kroot to 10-30% in Kstem and Kleaf. In response to treatments, AQP-mediated inhibition of Kroot rather than changes in xylem acclimation controlled the fluctuations in Kroot. The reduction in stomatal conductance and its sensitivity to vapor pressure deficit were direct responses to decreased whole-plant conductance triggered by lower Kroot and larger resistance belowground. Our results provide new mechanistic and functional insights on plant hydraulics that are essential to quantifying the influences of future stress on ecosystem function
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Pinus taeda
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|a Taxodium distichum
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|a Anatomy
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|a aquaporin activity
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|a bald cypress
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| 650 |
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|a conductances
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|a flooding
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|a leaf water relations
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| 650 |
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|a loblolly pine
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| 650 |
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|a plant hydraulics
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| 650 |
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|a water stress
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| 650 |
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|a Aquaporins
|2 NLM
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| 650 |
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|a Water
|2 NLM
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| 650 |
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|a 059QF0KO0R
|2 NLM
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| 700 |
1 |
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|a King, John S
|e verfasserin
|4 aut
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| 700 |
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|a Carmichael, Mary J
|e verfasserin
|4 aut
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| 700 |
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|a Overby, Anna Treado
|e verfasserin
|4 aut
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| 700 |
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|a Wortemann, Remi
|e verfasserin
|4 aut
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| 700 |
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|a Smith, William K
|e verfasserin
|4 aut
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| 700 |
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|a Miao, Guofang
|e verfasserin
|4 aut
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| 700 |
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|a Noormets, Asko
|e verfasserin
|4 aut
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| 700 |
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|a Johnson, Daniel M
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 72(2021), 12 vom: 28. Mai, Seite 4489-4501
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:72
|g year:2021
|g number:12
|g day:28
|g month:05
|g pages:4489-4501
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|u http://dx.doi.org/10.1093/jxb/erab100
|3 Volltext
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|d 72
|j 2021
|e 12
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|c 05
|h 4489-4501
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