Effects of Whole-root and Half-root Water Stress on Gas Exchange and Chlorophyll Fluorescence Parameters in Apple Trees
文献类型：期刊论文
| 作者 | Yuan, Jinhong; Xu, Man; Duan, Wei; Fan, Peige; Li, Shaohua |
| 刊名 | JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE
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| 出版日期 | 2013 |
| 英文摘要 | The responses of photosynthesis, chlorophyll fluorescence, and de-epoxidation state of the xanthophyll cycle pigments (DEPS) of micropropagated apple trees (Mains xdomestica) were investigated under whole-root water stress (WRS) and half-root water stress (HRS) induced by polyethylene glycol 6000 to simulate whole and partial root zone drying. Compared with control plants without water stress, plants under WRS and HRS exhibited reduced leaf net photosynthetic rate (P-n) and stomatal conductance (g(S)) with a greater reduction in WRS than in HRS plants. However, intercellular CO2 concentration (Ci) increased under WRS as water stress was prolonged, signifying a non-stomatal limitation of P-n. Regarding HRS, decreased P-n was mainly the result of a stomatal limitation explained by a relatively low Ci. Changes in photosynthesis and chlorophyll parameters indicate that severe and slight damage occurred to the photosynthetic apparatus of WRS and HRS leaves, respectively, starting at Day 3 after initiating water stress. This damage was not evident on the donor side but was expressed as a reduced capacity of the acceptor side of the photosystem II reaction centers. To prevent damage from excess light, the DEPS of WRS leaf increased. Decreased g(S) could explain reduced water use under an irrigation strategy of partial root zone drying in fruit trees. |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/574]  |
| 专题 | 中国科学院武汉植物园 |
| 推荐引用方式 GB/T 7714 | Yuan, Jinhong,Xu, Man,Duan, Wei,et al. Effects of Whole-root and Half-root Water Stress on Gas Exchange and Chlorophyll Fluorescence Parameters in Apple Trees[J]. JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE,2013. |
| APA | Yuan, Jinhong,Xu, Man,Duan, Wei,Fan, Peige,&Li, Shaohua.(2013).Effects of Whole-root and Half-root Water Stress on Gas Exchange and Chlorophyll Fluorescence Parameters in Apple Trees.JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE. |
| MLA | Yuan, Jinhong,et al."Effects of Whole-root and Half-root Water Stress on Gas Exchange and Chlorophyll Fluorescence Parameters in Apple Trees".JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE (2013). |
入库方式： OAI收割
来源：武汉植物园
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