2024年5月27日 星期一
淹水胁迫对星花玉兰及其相关品种叶片光合特性的影响
Effect of waterlogging stress on leaf photosynthetic characteristics of Yulania stellata and its related cultivars
2022年 第31卷 第6期 页码[87-89]    下载全文[0.9MB]  
摘要

为探讨星花玉兰〔Yulania stellata (Maxim.) N. H. Xia〕及其相关品种‘菊花’(‘Chrysanthemiflora’)和‘贝蒂’(‘Betty’)在梅雨期间叶片的光合响应机制,对淹水胁迫1、3、7和14 d星花玉兰、‘菊花’和‘贝蒂’3年生嫁接苗叶片的净光合速率、气孔导度、胞间CO2浓度和蒸腾速率进行比较。结果表明:淹水组星花玉兰、‘菊花’和‘贝蒂’叶片的净光合速率、气孔导度和蒸腾速率均低于对照组(正常浇水),并随淹水时间延长逐渐下降,而胞间CO2浓度则高于对照组,并随淹水时间延长逐渐升高。与对照组相比,淹水胁迫14 d 星花玉兰、‘菊花’和‘贝蒂’叶片的净光合速率、气孔导度和蒸腾速率分别下降了94.6%~100.9%、84.7%~95.6%和80.6%~86.2%,而胞间CO2浓度升高了74.1%~135.0%。总体来看,淹水胁迫对星花玉兰、‘菊花’和‘贝蒂’的叶片光合特性均有一定的影响,其中,‘贝蒂’受到的影响最小。

Abstract

To explore the photosynthetic response mechanism of leaves of Yulania stellata (Maxim.) N. H. Xia and its related cultivars ‘Chrysanthemiflora’ and ‘Betty’ during plum rain period, the net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, and transpiration rate of leaves of three-year-old grafted seedlings of Y. stellata, ‘Chrysanthemiflora’, and ‘Betty’ after waterlogging stress for 1, 3, 7, and 14 d were compared. The results show that the net photosynthetic rate, stomatal conductance, and transpiration rate of leaves of Y. stellata, ‘Chrysanthemiflora’, and ‘Betty’ in waterlogging group are all lower than those of the control group (normal watering), and gradually decrease with the elongation of waterlogging time, while the intercellular CO2 concentration is higher than that of the control group, and gradually increases with the elongation of waterlogging time. Compared with the control, the net photosynthetic rate, stomatal conductance, and transpiration rate of leaves of Y.stellata, ‘Chrysanthemiflora’, and ‘Betty’ after waterlogging stress for 14 d decrease by 94.6%-100.9%, 84.7%-95.6%, and 80.6%-86.2%, respectively, while the intercellular CO2 concentration increases by 74.1%-135.0%. In general, waterlogging stress has some influences on leaf photosynthetic characteristics of Y. stellata, ‘Chrysanthemiflora’, and ‘Betty’, in which, ‘Betty’ is the least affected.

关键词星花玉兰; ‘菊花’; ‘贝蒂’; 淹水胁迫; 光合特性
Key wordsYulania stellata (Maxim.) N. H. Xia; ‘Chrysanthemiflora’; ‘Betty’; waterlogging stress; photosynthetic characteristics
作者陈伯祥1,杜习武1,2, 秦俊1,3, 曾丽2, 胡永红1,3, 叶康1,3
所在单位1. 上海辰山植物园, 上海 201602; 2. 上海交通大学农业与生物学院, 上海 200240;3. 上海城市树木生态应用工程技术研究中心, 上海 200020
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基金项目上海市农业农村委员会科技兴农项目〔沪农科推字(2019)第1-8号〕; 上海市绿化和市容管理局科技项目(G212409; G182421; G192401); 上海市科学技术委员会科技创新行动计划(19DZ1203500; 19DZ1203501)