水分胁迫对三峡库区消落带桑树幼苗生理特性的影响

doi:10.11707/j.1001-7488.20121219

林业科学 ›› 2012, Vol. 48 ›› Issue (12): 122-127.doi: 10.11707/j.1001-7488.20121219

水分胁迫对三峡库区消落带桑树幼苗生理特性的影响

黄小辉^1,2, 刘芸¹, 李佳杏¹, 熊兴政¹, 尹小华¹, 陈阳¹, 秦俭³, 黄先智³, 杜英武⁴

1. 西南大学资源环境学院林学系重庆 400716;2. 重庆市林业科学研究院三峡库区森林生态保护与恢复重庆市市级重点实验室重庆 400036;3. 西南大学蚕学与系统生物学研究所重庆 400716;4. 重庆市蚕业管理总站重庆 400020

收稿日期:2011-10-12 修回日期:2011-12-22 出版日期:2012-12-25 发布日期:2012-12-25
通讯作者: 刘芸

Effects of Water Stress on Physiological Characteristics of Mulberry(Morus alba) seedlings in the Hydro-Fluctuation Belt of the Three Gorges Reservoir Area

Huang Xiaohui^1,2, Liu Yun¹, Li Jiaxing¹, Xiong Xingzheng¹, Yin Xiaohua¹, Chen Yang¹, Qin Jian³, Huang Xianzhi³, Du Yingwu⁴

1. Department of Forestry, College of Resources and Environment, Southwest University Chongqing 400716;2. Chongqing Key laboratory of the Three Gorges Area Forest Ecology Protection and Restoration Chongqing Academy of Forestry Chongqing 400036;3. Institute of Sericulture and Systems Biology, Southwest University Chongqing 400716;4. Chongqing Silkworm Industry Management Station Chongqing 400020

Received:2011-10-12 Revised:2011-12-22 Online:2012-12-25 Published:2012-12-25

摘要/Abstract

关键词: 桑树, 苗期锻炼, 三峡库区消落带, 生理特性

Abstract:

Guisang 12, a variety of mulberry (Morus alba), was used to study the effects of different levels of water hardening on physiological characteristics of the mulberry seedlings in the hydro-fluctuation belt of the Three Gorges Reservoir Area. The seedlings were subjected to different water regimes for 30 days. The results showed that: the chlorophyll content of mulberry seedlings was increased by 10.4% under the drought hardening (DH) condition than that of CK, while decreased by 3.2% under the waterlogging hardening (WH) condition than that of CK. With the soil moisture content reducing, the stomatal conductance (G_s) and transpiration rate (Tr) of mulberry seedlings both declined remarkably; The photosynthetic rate (P_n) of mulberry seedlings under the drought hardening and waterlogging hardening conditions was all higher than that of CK, and the intercellular CO₂ concentration (C_i) under the two conditions was lower than that of CK; The instantaneous water use efficiency of mulberry seedlings under the drought hardening and waterlogging hardening conditions was remarkably increased by 57% and 27% than that of CK, respectively, and the abscisic acid (ABA) content in the two conditions were remarkably increased by 79% and 29% than that of CK, respectively.

Key words: mulberry, seedlings hardening, the hydro-fluctuation belt of the Three Gorges Reservoir Area, physiological characteristics

中图分类号:

S718.43

黄小辉;刘芸;李佳杏;熊兴政;尹小华;陈阳;秦俭;黄先智;杜英武. 水分胁迫对三峡库区消落带桑树幼苗生理特性的影响[J]. 林业科学, 2012, 48(12): 122-127.

Huang Xiaohui;Liu Yun;Li Jiaxing;Xiong Xingzheng;Yin Xiaohua;Chen Yang;Qin Jian;Huang Xianzhi;Du Yingwu. Effects of Water Stress on Physiological Characteristics of Mulberry(Morus alba) seedlings in the Hydro-Fluctuation Belt of the Three Gorges Reservoir Area[J]. Scientia Silvae Sinicae, 2012, 48(12): 122-127.

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水分胁迫对三峡库区消落带桑树幼苗生理特性的影响

Effects of Water Stress on Physiological Characteristics of Mulberry(Morus alba) seedlings in the Hydro-Fluctuation Belt of the Three Gorges Reservoir Area

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