[1]丁释丰,袁森,黄稚清,等.干旱胁迫对红果风铃木幼苗生理生化指标的影响[J].黑龙江农业科学,2019,(03):13-17.[doi:10.11942/j.issn1002-2767.2019.03.0013]
　DING Shi-feng,YUAN Sen,HUANG Zhi-qing,et al.Effects of Drought Stress on Physiological and Biochemical Indexes of Handroanthus chrysotrichus Seedlings[J].HEILONGJIANG AGRICULTURAL SCIENCES,2019,(03):13-17.[doi:10.11942/j.issn1002-2767.2019.03.0013]
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干旱胁迫对红果风铃木幼苗生理生化指标的影响

《黑龙江农业科学》[ISSN:1002-2767/CN:23-1204/S] 卷: 期数: 2019年03期 页码: 13-17 栏目: 出版日期: 2019-03-10
Title:
Effects of Drought Stress on Physiological and Biochemical Indexes of Handroanthus chrysotrichus Seedlings
作者:
丁释丰; 袁森; 黄稚清; 冯志坚
华南农业大学 林学与风景园林学院，广东 广州 510642
Author(s):
DING Shi-feng; YUAN Sen; HUANG Zhi-qing; FENG Zhi-jian
College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou 510642,China
关键词:
红果风铃木; 干旱胁迫; 形态特征; 生理生化指标
Keywords:
Handroanthus chrysotrichus;  drought stress;  morphological characteristics;  physiological and biochemical indexes
DOI:
10.11942/j.issn1002-2767.2019.03.0013
文献标志码:
A
摘要:
为分析红果风铃木在干旱胁迫下的生理生化响应，以1年生红果风铃木幼苗为材料，测定不同干旱胁迫程度下红果风铃木SOD总活性、MDA、PRO及SC含量，以自然条件下生长的幼苗为对照，观察幼苗在胁迫下的受害情况。结果表明：随着干旱胁迫程度的加深，红果风铃木生长受到显著影响，水平衡在第4天明显失调，MDA含量显著增加，Pro和可溶性糖含量在第6天达到最大值，SOD总活性在整个胁迫周期内变化不明显，由此判断植株体内SOD活性对干旱胁迫的响应具有滞后性，最终导致MDA含量上升，细胞质膜被破坏，Pro与可溶性糖调节渗透压失衡，最终引起植株发生不可逆伤害。在随后30 d的恢复处理中，除干旱10 d组外，其余各组均能恢复正常生长，说明干旱8 d左右是红果风铃木干旱死亡的临界值。
Abstract:
In order to analyze physiological and biochemical responses of Handroanthus chrysotrichus to drought stress,the total activity of SOD and the contents of MDA,Pro and soluble sugar were measured under different drought stress in the 1-year old seedlings.The seedlings growing under natural conditions were used as control,and the injury of seedlings under stress was observed.The results showed that,with the deepening of drought stress,the growth of Handroanthus chrysotrichus was significantly affected.The water balance was obviously out of balance on the 4th day,the content of MDA increased significantly,the contents of Pro and soluble sugar reached the maximum ot the 6th day.Besides that the total activity of SOD did not change significantly during the whole stress cycle,which concluded that the response of SOD activity to drought stress was delayed.The delay of SOD resulted in the increase of MDA content,consequenced the destruction of cytoplasmic membrane and the imbalance of osmotic pressure regulated by Pro and soluble suger,which resulted in irreversible damage to plants.In the subsequent 30 days of recovery treatment,all the other groups were able to resume normal growth except for the 10-day drought group,indicating that the drought lasted for about 8 days was the critical value of the drought death of Handroanthus chrysotrichus.

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备注/Memo

收稿日期：2018-09-13

基金项目：风铃木苗木栽培技术规程（2015-DB-16）。
第一作者简介：丁释丰（1994-），男，在读硕士，从事林学、植物生理和生态学研究。E-mail：105967310@qq.com。
通讯作者：冯志坚（1962-），男，副教授，从事野生植物资源保护与利用研究。E-mail:fengzj@scau.edu.cn。

更新日期/Last Update: 2019-03-24