Hydraulic conductance and vulnerability to cavitation in corn (Zea mays L.) hybrids of differing drought resistance
文献类型：期刊论文
| 作者 | Li Yangyang ; Sperry John S. ; Shao Mingan |
| 刊名 | ENVIRONMENTAL AND EXPERIMENTAL BOTANY
 |
| 出版日期 | 2009 |
| 卷号 | 66期号:2页码:341-346 |
| 关键词 | Hydraulic conductivity Vulnerability Cavitation Corn |
| 通讯作者 | Li, YY |
| 英文摘要 | Water transport through the xylem is essential for replacing water loss during transpiration. thus preventing desiccation and permitting photosynthesis. The occurrence of cavitation and embolism due to drought impairs transport to the transpiring leaves. Most research in this discipline has been conducted on woody plants. Less attention has been given to cavitation of crops and its physiological significance for understanding crop water relations. In this paper, hydraulic conductance and vulnerability of xylem to cavitation were studied in corn hybrids with different drought resistances. The results indicated that steins of drought-resistant 'Pioneer 3902' not only had a higher conductivity on both a stein area and leaf area basis but also had a greater resistance to cavitation. The estimated xylem pressure at 63.2% loss of conductivity (Weibull fitting parameter b) and at 50% loss of conductivity (P(50)) in 'Pioneer 3902' were about 0.2 MPa lower than in 'Pride 5'. Higher conductivity in 'Pioneer 3902' was mainly attributed to more vascular bundles per stem area rather than greater vessel diameter. The central bundles and peripheral vascular bundles showed the same degree of cavitation although the vessels of central bundles were generally larger than in peripheral bundles. Crown Copyright (c) 2009 Published by Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2012-06-14 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/4813]  |
| 专题 | 水土保持研究所_水保所知识产出(1956-2013) |
| 推荐引用方式 GB/T 7714 | Li Yangyang,Sperry John S.,Shao Mingan. Hydraulic conductance and vulnerability to cavitation in corn (Zea mays L.) hybrids of differing drought resistance[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2009,66(2):341-346. |
| APA | Li Yangyang,Sperry John S.,&Shao Mingan.(2009).Hydraulic conductance and vulnerability to cavitation in corn (Zea mays L.) hybrids of differing drought resistance.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,66(2),341-346. |
| MLA | Li Yangyang,et al."Hydraulic conductance and vulnerability to cavitation in corn (Zea mays L.) hybrids of differing drought resistance".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 66.2(2009):341-346. |
入库方式： OAI收割
来源：水土保持研究所
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