|Table of Contents|

Improving Heat-resistance of Rhododendron hybridum by Using Salicylic Acid Combined With Abscisic Acid During High Temperature Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2018年12
Page:
1-6
Research Field:
Publishing date:

Info

Title:
Improving Heat-resistance of Rhododendron hybridum by Using Salicylic Acid Combined With Abscisic Acid During High Temperature Stress
Author(s):
MO Xiaofeng1; WEN Qinglan1; QIN Liping1; MO Yiwei2; LAN Qun3
（1.Guilin Forestry Research Institute, Guilin ,Guangxi 541004；2.College of Life Science, Shaoxing University, Shaoxing ,Zhejiang 312000；3.College of Food and Biochemical Engineering, Guangxi Science and Technology University ,Laibin ,Guangxi 546100）
Keywords:
Rhododendron hybridum; heat stress; salicylic acid; abscisic acid; antioxidant enzyme activity
PACS:
-
DOI:
10.11937/bfyy.20174127
Abstract:
To explore the effects of exogenous Salicylic acid (SA) and Abscisic acid (ABA) treatment on heat resistance of Rhododendron hybridum. 2-year old Rhododendron hybridum ‘Yanzhimi’ were sprayed with 0 (Control), 10.0 μmol·L-1 SA, 30.0 μmol·L-1 ABA and 10.0 μmol·L-1 SA+30.0 μmol·L-1 ABA solution on the leaves and roots for two days, respectively. And then treated with heat stress (39 ℃/29 ℃,day/night) for 8 days by using plant growth chamber. The total chlorophyll content, osmotic regulation substances, membrane lipid peroxidation, and antioxidant enzymes activity of leaves were measured after different treatment times. The results showed that, compare to the control, treated with SA, ABA and SA+ABA could markedly improved the leaves of total soluble sugar, proline, relative water and chlorophyll content, and decreased relative electrical conductivity, Malondialdehyde (MDA) and H2O2 content in leaves. Meanwhile, improved activities of SOD and CAT in leaves. However, compared with the control, treated SA coupled with ABA had the best effect improving heat resistance for Rhododendron hybridum, and then was treated with ABA and SA. These results showed that treat with SA+ABA can improve osmotic regulation substances content, inhibiting water loss, chlorophyll degradation and membrane oxidation, enhance the resistance to high temperature stress and alleviate the negative injuries. Keywords：Rhododendron hybridum；heat stress；salicylic acid；abscisic acid；antioxidant enzyme activity

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Last Update: 2018-04-27