Mapping ‘hydroscapes’ along the iso‐ to anisohydric continuum of stomatal regulation of plant water status
| Autor: | Danielle E. Marias, Katherine A. McCulloh, David R. Woodruff, Alicia L. Magedman, Ava R. Howard, Frederick C. Meinzer, Duncan D. Smith |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Drought resistance Ecology Turgor pressure Water Plant physiology Plant Transpiration Biology Environment Controlled Atmospheric sciences Osmosis 010603 evolutionary biology 01 natural sciences Magnoliopsida Agronomy Plant Stomata Osmotic pressure Plant traits Soil drying Ecology Evolution Behavior and Systematics 010606 plant biology & botany Woody plant |
| Zdroj: | Ecology Letters. 19:1343-1352 |
| ISSN: | 1461-0248 1461-023X |
| Popis: | The concept of iso- vs. anisohydry has been used to describe the stringency of stomatal regulation of plant water potential (ψ). However, metrics that accurately and consistently quantify species' operating ranges along a continuum of iso- to anisohydry have been elusive. Additionally, most approaches to quantifying iso/anisohydry require labour-intensive measurements during prolonged drought. We evaluated new and previously developed metrics of stringency of stomatal regulation of ψ during soil drying in eight woody species and determined whether easily-determined leaf pressure-volume traits could serve as proxies for their degree of iso- vs. anisohydry. Two metrics of stringency of stomatal control of ψ, (1) a 'hydroscape' incorporating the landscape of ψ over which stomata control ψ, and (2) the slope of the daily range of ψ as pre-dawn ψ declined, were strongly correlated with each other and with the leaf osmotic potential at full and zero turgor derived from pressure-volume curves. |
| Databáze: | OpenAIRE |
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