当前位置: X-MOL 学术Aust. J. Grape Wine Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Interactive effects of high temperature and water deficit on Malbec grapevines
Australian Journal of Grape and Wine Research ( IF 2.5 ) Pub Date : 2019-06-26 , DOI: 10.1111/ajgw.12398
E. Galat Giorgi 1 , V. O. Sadras 2 , M. Keller 3 , J. Perez Peña 1
Affiliation  

Background and Aims Studies of the interactive effects of drought and high temperature on the physiological responses of grapevines (Vitis spp.) are scarce. We tested whether well‐watered, potted vines were able to avoid heat waves through evaporative cooling in comparison to those suffering from water deficit. Methods and Results A greenhouse experiment was conducted with own‐rooted Malbec grapevines under two water regimes, well‐watered (100% of pot capacity) and water deficit (50% of pot capacity), and two air temperature regimes, high (45/22°C) and Control temperature (35/20°C). Short‐term stomatal and non‐stomatal regulation of photosynthesis was assessed by measuring leaf gas exchange, stomatal conductance (g s) and chlorophyll fluorescence. Whole‐plant transpiration and vegetative growth were also measured. In well‐watered vines, high air temperature increased g s and leaf transpiration (E leaf), which decreased leaf temperature and increased vegetative growth, whole‐vine transpiration and leaf net photosynthesis (P n). Water deficit strongly reduced growth, P n, g s and E leaf. For vines under high temperature, however, reduction in P n, g s and E leaf was smaller than for that under the Control temperature. Conclusions Evaporative cooling may help well‐watered grapevines withstand heat waves and avoid irreversible reduction in gas exchange and chlorophyll fluorescence. Significance of the Study This study improves our understanding of grapevine response to a heat stress and water deficit, which are both predicted to increase with climate change.

中文翻译:

高温缺水对马尔贝克葡萄藤的交互作用

背景和目的 干旱和高温对葡萄树(Vitis spp.)生理反应的交互作用的研究很少。我们测试了与缺水的葡萄藤相比,浇水充足的盆栽葡萄藤是否能够通过蒸发冷却来避免热浪。方法和结果 对自生马尔贝克葡萄藤进行了温室试验,在两种水分条件下,充分浇水(盆栽容量的 100%)和缺水(盆栽容量的 50%),以及两种气温条件,高(45/ 22°C) 和控制温度 (35/20°C)。通过测量叶片气体交换、气孔导度 (gs) 和叶绿素荧光来评估光合作用的短期气孔和非气孔调节。还测量了整株植物的蒸腾作用和营养生长。在浇水充足的葡萄藤中,高气温增加了 gs 和叶片蒸腾作用(E 叶),从而降低了叶片温度并增加了营养生长、全株蒸腾作用和叶片净光合作用(P n)。水分亏缺强烈降低生长、P n、gs 和 E 叶。然而,对于高温下的葡萄藤,P n、gs 和 E 叶的减少量小于控制温度下的减少。结论 蒸发冷却可以帮助浇水充足的葡萄藤抵御热浪,避免气体交换和叶绿素荧光的不可逆减少。研究的意义 这项研究提高了我们对葡萄树对热应激和缺水的反应的理解,预计这两者都会随着气候变化而增加。全藤蒸腾作用和叶净光合作用(P n)。水分亏缺强烈降低生长、P n、gs 和 E 叶。然而,对于高温下的葡萄藤,P n、gs 和 E 叶的减少量小于控制温度下的减少。结论 蒸发冷却可以帮助浇水充足的葡萄藤抵御热浪,避免气体交换和叶绿素荧光的不可逆减少。研究的意义 这项研究提高了我们对葡萄树对热应激和缺水的反应的理解,预计这两者都会随着气候变化而增加。全藤蒸腾作用和叶净光合作用(P n)。水分亏缺强烈降低生长、P n、gs 和 E 叶。然而,对于高温下的葡萄藤,P n、gs 和 E 叶的减少量小于控制温度下的减少。结论 蒸发冷却可以帮助浇水充足的葡萄藤抵御热浪,避免气体交换和叶绿素荧光的不可逆减少。研究的意义 这项研究提高了我们对葡萄树对热应激和缺水的反应的理解,预计这两者都会随着气候变化而增加。结论 蒸发冷却可以帮助浇水充足的葡萄藤抵御热浪,避免气体交换和叶绿素荧光的不可逆减少。研究的意义 这项研究提高了我们对葡萄树对热应激和缺水的反应的理解,预计这两者都会随着气候变化而增加。结论 蒸发冷却可以帮助浇水充足的葡萄藤抵御热浪,避免气体交换和叶绿素荧光的不可逆减少。研究的意义 这项研究提高了我们对葡萄树对热应激和缺水的反应的理解,预计这两者都会随着气候变化而增加。
更新日期:2019-06-26
down
wechat
bug