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- Title
庐山不同海拔茶树光合响应差异研究.
- Authors
程冬梅; 张丽; 韦红飞; 江新凤; 周赛霞; 张志勇; 彭焱松
- Abstract
To illustrate the photosynthetic response and photosystem Ⅱ (PSⅡ) photoinhibition of tea leaves to altitudinal gradient, native tea population of Camellia sinensis grown in the cloudy and misty Lushan Mount was measured in terms of photosynthetic gas exchange and chlorophyll fluorescence. Results show that the leaf thickness, maximum photosynthesis rate (Pnmax), maximum relative electron transport rate of PSⅡ [rETR(Ⅱ)]max, compensation irradiation (Ic), saturation irradiation (Isat), half saturation irradiation (Ik) and water usage efficiency (WUE) increased with the altitude increased. While vapor pressure deficit (VPD), stomatal conductance, transpiration rate, intercellular CO2 and dark respiration rate (Rd) displayed an opposite trend. The maximum potential photochemical efficiency of PSⅡ (Fv/Fm) increased while the quantum yield of non-regulated energy dissipation of PSⅡ [Y(NO)] decreased with the altitude increased. The effective photochemical quantum yield of PSⅡ [Φ(Ⅱ)], photochemical quenching (qP) and relative electron transport rate of PSⅡ [rETR(Ⅱ)] all increased at higher altitudes. Overall, tea trees at lower altitudes exhibited decrease of photosynthetic performance compared to those at higher altitudes, due to photoinhibition of PSⅡ.
- Publication
Journal of Tea Science, 2019, Vol 39, Issue 4, p447
- ISSN
1000-369X
- Publication type
Article