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Photosynthesis of young apple trees in response to low sink demand under different air temperatures
文献类型：期刊论文
| 作者 | Fan, Pei G.2,3; Li, Lian S.2; Duan, Wei2; Li, Wei D.4; Li, Shao H.1 |
| 刊名 | TREE PHYSIOLOGY
 |
| 出版日期 | 2010-03-01 |
| 卷号 | 30期号:3页码:313-325 |
| 关键词 | chlorophyll fluorescence end products enzyme activity gas exchange source-sink regulation |
| ISSN号 | 0829-318X |
| DOI | 10.1093/treephys/tpp114 |
| 英文摘要 | Gas exchange, chlorophyll fluorescence, photosynthetic end products and related enzymes in source leaves in response to low sink demand after girdling to remove the root sink were assessed in young apple trees (Malus pumila) grown in two greenhouses with different air temperatures for 5 days. Compared with the non-girdled control in the low-temperature greenhouse (diurnal maximum air temperature < 32 degrees C), low sink demand resulted in lower net photosynthetic rate (P(n)), stomatal conductance (g(s)) and transpiration rate (E) but higher leaf temperature on Day 5, while in the high-temperature greenhouse (diurnal maximum air temperature > 36 degrees C), P(n), g(s) and E declined from Day 3 onwards. Moreover, gas exchange responded more to low sink demand in the high-temperature greenhouse than in the low-temperature greenhouse. Decreased P(n) at low sink demand was accompanied by lower intercellular CO(2) concentrations in the low-temperature greenhouse. However, decreased maximal photochemical efficiency, potential activity, efficiency of excitation capture, actual efficiency and photochemical quenching, with increased minimal fluorescence and non-photochemical quenching of photosystem II (PSII), were observed in low sink demand leaves only in the high-temperature greenhouse. In addition, low sink demand increased leaf starch and soluble carbohydrate content in both greenhouses but did not result in lower activity of enzymes involved in metabolism. Thus, decreased P(n) under low sink demand was independent of a direct effect of end-product feedback but rather depended on a high temperature threshold. The lower P(n) was likely due to stomatal limitation in the low-temperature greenhouse, but mainly due to non-stomatal limitation in the high-temperature greenhouse. |
| 资助项目 | National Natural Science Foundation of China[30800743] ; CAS/CAFEA International Partnership Program for Creative Research Teams ; Chinese Academy of Sciences |
| WOS研究方向 | Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:000275271100001 |
| 出版者 | OXFORD UNIV PRESS |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/976]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Li, Shao H. |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Bot Garden, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100093, Peoples R China 4.Beijing Univ Chinese Med, Sch Chinese Pharm, Beijing 100102, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Pei G.,Li, Lian S.,Duan, Wei,et al. Photosynthesis of young apple trees in response to low sink demand under different air temperatures[J]. TREE PHYSIOLOGY,2010,30(3):313-325. |
| APA | Fan, Pei G.,Li, Lian S.,Duan, Wei,Li, Wei D.,&Li, Shao H..(2010).Photosynthesis of young apple trees in response to low sink demand under different air temperatures.TREE PHYSIOLOGY,30(3),313-325. |
| MLA | Fan, Pei G.,et al."Photosynthesis of young apple trees in response to low sink demand under different air temperatures".TREE PHYSIOLOGY 30.3(2010):313-325. |
入库方式： OAI收割
来源：武汉植物园
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