Plant height shapes hydraulic architecture but does not predict metaxylem area under drought in Sorghum bicolor .
Autor: | Lehrer MA; Department of Biology West Virginia University Morgantown West Virginia USA.; Department of Ecosystem Science and Management The Pennsylvania State University University Park Pennsylvania USA., Hawkins JS; Department of Biology West Virginia University Morgantown West Virginia USA. |
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Jazyk: | angličtina |
Zdroj: | Plant direct [Plant Direct] 2023 May 22; Vol. 7 (5), pp. e498. Date of Electronic Publication: 2023 May 22 (Print Publication: 2023). |
DOI: | 10.1002/pld3.498 |
Abstrakt: | Climate change-induced variations in temperature and precipitation negatively impact plant growth and development. To ensure future food quality and availability, a critical need exists to identify morphological and physiological responses that confer drought tolerance in agro-economically important crop plants throughout all growth stages. In this study, two Sorghum bicolor accessions that differ in their pre-flowering responses to drought were exposed to repeated cycles of drying and rewatering. Morphological, physiological, and histological traits were measured across both juvenile and adult developmental stages. Our results demonstrate that plant height is not predictive of metaxylem area but does influence the hydraulic path and water management in an accession-specific manner. Further, when drought-responsive changes to the plant architecture are unable to compensate for the hydraulic risk associated with prolonged drought exposure, tight control of stomatal aperture is crucial to further mitigate hydraulic damage and prevent xylem embolism. Competing Interests: MAL and JSH declare that there is no conflict of interest. (© 2023 The Authors. Plant Direct published by American Society of Plant Biologists and the Society for Experimental Biology and John Wiley & Sons Ltd.) |
Databáze: | MEDLINE |
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