| 摘要: |
| [目的]通过对元宝枫幼树在不同水分条件下生理特性的研究,为元宝枫的栽培管理提供指导.[方法]以2年生元宝枫幼树为试验材料,利用盆栽试验探讨了不同水分胁迫强度(中度、重度水分胁迫)和胁迫时间(15,30,45 d)及复水24 h后,叶片水分饱和亏缺(WSD)、叶水势、光合速率及其恢复度的变化规律.[结果]在相同胁迫强度下,随着胁迫时间的增加,各生理指标经历了对水分胁迫由原初反应到逐渐适应的过程.复水后,叶水势较WSD恢复滞后,光合速率恢复较WSD、叶水势慢.中度水分胁迫解除后,各生理指标出现补偿甚至超补偿现象,而重度水分胁迫不易出现补偿效应.[结论]适度的水分胁迫能激发元宝枫的补偿效应. |
| 关键词: 元宝枫 水分胁迫 复水 叶水势 光合参数 |
| DOI： |
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| 基金项目:国家自然科学基金项目（30771722） |
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| Effect of water stress and rewatering on the physiological characteristics of Acer truncatum seedlings |
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| Abstract: |
| 【Objective】 The study was done in order to give a theoretical basis for Acer truncatum cultured through study on physiological characteristics of Acer truncatum seedlings under different water conditions.【Method】 Based on water saturation deficit,leaf water potential and photosynthetic parameters with two-year-old pot-cultured seedlings of Acer truncatum, physiological characteristics regulation and restoration degree under different water stress strengths（Moderate and Severe water stress）and stress lengths （15,30,45 d）after rewatering 24 hours were studied. 【Result】 At the same water stress strength,physiological characteristics turned suffering with stress into enduring gradually with the deepening of water stress.After rewatering 24 hours,the restoration of leaf water potential delayed compared with WSD.The restoration of Photosynthetic rate was the latest among them.After moderate water stress followed by rewatering,compensation effect or even extra compensation effect on physiological indexes can happen,however,it was impossible that compensation effect happened after severe water stress. 【Conclusion】 Compensation effect can be waken after proper water stress. |
| Key words: Acer truncatum water stress rewatering leaf water potential Photosynthetic parameter |
