Recovery of diurnal depression of leaf hydraulic conductance in a subtropical woody bamboo species: Embolism refilling by nocturnal root pressure
Despite considerable investigations of diurnal water use characteristics in different plant functional groups, the research on daily water use strategies of woody bamboo grasses remains lacking. We studied the daily water use and gas exchange of Sinarundinaria nitida (Mitford) Nakai, an abundant sub...
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2012
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0829318X_v32_n4_p414_Yang http://hdl.handle.net/20.500.12110/paper_0829318X_v32_n4_p414_Yang |
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paper:paper_0829318X_v32_n4_p414_Yang2023-06-08T15:46:08Z Recovery of diurnal depression of leaf hydraulic conductance in a subtropical woody bamboo species: Embolism refilling by nocturnal root pressure cavitation daily water balance hydraulic conductivity refilling root pressure carbon dioxide water bamboo carbon dioxide cavitation functional group gas exchange hydraulic conductivity nocturnal activity root system stomatal conductance water use efficiency woody plant article China evapotranspiration metabolism photosynthesis physiological stress physiology plant leaf plant root plant stem plant stoma Poaceae pressure tropic climate wood Carbon Dioxide China Photosynthesis Plant Leaves Plant Roots Plant Stems Plant Stomata Plant Transpiration Poaceae Pressure Stress, Physiological Tropical Climate Water Wood China Phyllostachys acuta Poaceae Sinarundinaria Despite considerable investigations of diurnal water use characteristics in different plant functional groups, the research on daily water use strategies of woody bamboo grasses remains lacking. We studied the daily water use and gas exchange of Sinarundinaria nitida (Mitford) Nakai, an abundant subtropical bamboo species in Southwest China. We found that the stem relative water content (RWC) and stem hydraulic conductivity (Ks) of this bamboo species did not decrease significantly during the day, whereas the leaf RWC and leaf hydraulic conductance (Kleaf) showed a distinct decrease at midday, compared with the predawn values. Diurnal loss of Kleaf was coupled with a midday decline in stomatal conductance (gs) and CO2 assimilation. The positive root pressures in the different habitats were of sufficient magnitude to refill the embolisms in leaves. We concluded that (i) the studied bamboo species does not use stem water storage for daily transpiration; (ii) diurnal down-regulation in Kleaf and gs has the function to slow down potential water loss in stems and protect the stem hydraulic pathway from cavitation; (iii) since Kleaf did not recover during late afternoon, refilling of embolism in bamboo leaves probably fully depends on nocturnal root pressure. The embolism refilling mechanism by root pressure could be helpful for the growth and persistence of this woody monocot species. © 2012 The Author. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0829318X_v32_n4_p414_Yang http://hdl.handle.net/20.500.12110/paper_0829318X_v32_n4_p414_Yang |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
cavitation daily water balance hydraulic conductivity refilling root pressure carbon dioxide water bamboo carbon dioxide cavitation functional group gas exchange hydraulic conductivity nocturnal activity root system stomatal conductance water use efficiency woody plant article China evapotranspiration metabolism photosynthesis physiological stress physiology plant leaf plant root plant stem plant stoma Poaceae pressure tropic climate wood Carbon Dioxide China Photosynthesis Plant Leaves Plant Roots Plant Stems Plant Stomata Plant Transpiration Poaceae Pressure Stress, Physiological Tropical Climate Water Wood China Phyllostachys acuta Poaceae Sinarundinaria |
| spellingShingle |
cavitation daily water balance hydraulic conductivity refilling root pressure carbon dioxide water bamboo carbon dioxide cavitation functional group gas exchange hydraulic conductivity nocturnal activity root system stomatal conductance water use efficiency woody plant article China evapotranspiration metabolism photosynthesis physiological stress physiology plant leaf plant root plant stem plant stoma Poaceae pressure tropic climate wood Carbon Dioxide China Photosynthesis Plant Leaves Plant Roots Plant Stems Plant Stomata Plant Transpiration Poaceae Pressure Stress, Physiological Tropical Climate Water Wood China Phyllostachys acuta Poaceae Sinarundinaria Recovery of diurnal depression of leaf hydraulic conductance in a subtropical woody bamboo species: Embolism refilling by nocturnal root pressure |
| topic_facet |
cavitation daily water balance hydraulic conductivity refilling root pressure carbon dioxide water bamboo carbon dioxide cavitation functional group gas exchange hydraulic conductivity nocturnal activity root system stomatal conductance water use efficiency woody plant article China evapotranspiration metabolism photosynthesis physiological stress physiology plant leaf plant root plant stem plant stoma Poaceae pressure tropic climate wood Carbon Dioxide China Photosynthesis Plant Leaves Plant Roots Plant Stems Plant Stomata Plant Transpiration Poaceae Pressure Stress, Physiological Tropical Climate Water Wood China Phyllostachys acuta Poaceae Sinarundinaria |
| description |
Despite considerable investigations of diurnal water use characteristics in different plant functional groups, the research on daily water use strategies of woody bamboo grasses remains lacking. We studied the daily water use and gas exchange of Sinarundinaria nitida (Mitford) Nakai, an abundant subtropical bamboo species in Southwest China. We found that the stem relative water content (RWC) and stem hydraulic conductivity (Ks) of this bamboo species did not decrease significantly during the day, whereas the leaf RWC and leaf hydraulic conductance (Kleaf) showed a distinct decrease at midday, compared with the predawn values. Diurnal loss of Kleaf was coupled with a midday decline in stomatal conductance (gs) and CO2 assimilation. The positive root pressures in the different habitats were of sufficient magnitude to refill the embolisms in leaves. We concluded that (i) the studied bamboo species does not use stem water storage for daily transpiration; (ii) diurnal down-regulation in Kleaf and gs has the function to slow down potential water loss in stems and protect the stem hydraulic pathway from cavitation; (iii) since Kleaf did not recover during late afternoon, refilling of embolism in bamboo leaves probably fully depends on nocturnal root pressure. The embolism refilling mechanism by root pressure could be helpful for the growth and persistence of this woody monocot species. © 2012 The Author. |
| title |
Recovery of diurnal depression of leaf hydraulic conductance in a subtropical woody bamboo species: Embolism refilling by nocturnal root pressure |
| title_short |
Recovery of diurnal depression of leaf hydraulic conductance in a subtropical woody bamboo species: Embolism refilling by nocturnal root pressure |
| title_full |
Recovery of diurnal depression of leaf hydraulic conductance in a subtropical woody bamboo species: Embolism refilling by nocturnal root pressure |
| title_fullStr |
Recovery of diurnal depression of leaf hydraulic conductance in a subtropical woody bamboo species: Embolism refilling by nocturnal root pressure |
| title_full_unstemmed |
Recovery of diurnal depression of leaf hydraulic conductance in a subtropical woody bamboo species: Embolism refilling by nocturnal root pressure |
| title_sort |
recovery of diurnal depression of leaf hydraulic conductance in a subtropical woody bamboo species: embolism refilling by nocturnal root pressure |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0829318X_v32_n4_p414_Yang http://hdl.handle.net/20.500.12110/paper_0829318X_v32_n4_p414_Yang |
| _version_ |
1768544416280084480 |