Physiology Response of Correa carmen Seedlings to Combined Elevated Temperature and Drought Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:

2017年19

Page:

81-88

Research Field:

Publishing date:

Info

Title:

Physiology Response of Correa carmen Seedlings to Combined Elevated Temperature and Drought Stress

Author(s):

ZHANG Zhilu1; LIU Zhonghua2; CHEN Minghui1; LIU Yongjin1; WANG Qing1

1.College of Chemistry and Environmental Engineering,Pingdingshan University,Pingdingshan,Henan 467000；2.College of Art Design,Pingdingshan University,Pingdingshan,Henan 467000

Keywords:

anti-oxidant enzyme activity; combined stress; Correa carmen; drought; elevated temperature; ROS metabolism

PACS:

-

DOI:

10.11937/bfyy.20170134

Abstract:

Cultivated Correa carmen seedlings in pot as test material in phytotron to study the effects of combined stress of elevated temperature and drought on the physiological activities of the protective enzyme system of the seedlings,with a view to providing scientific theoretical basis for the cultivation and promotion of Correa carmen,and the anti-breeding of garden plants,a small contribution to the research of plant physiology and ecology.The results showed that,under the single stress of drought or high temperature,H₂O₂ content,O?-² produce rate and MDA content of Correa carmen seedlings increased significantly,at the same time the activities of SOD,POD and CAT antioxidant enzyme also increased significantly.Under the composite stress of high temperature and drought,ROS content and antioxidant enzyme activities were significantly higher than that of single stress,SOD activity nearly superposition growth;compared with the single stress,MDA content had no significant change under complex stress.ROS content and antioxidant enzyme activities progressively increased along with the extension of stress time and the increase of the stress degree.Nevertheless,antioxidant enzyme activities decreased significantly when the stress increased to a certain degree or lasted a certain period.The hurt to Correa carmen of the stress of drought was significantly than elevated temperature.All above results showed that Correa carmen seedlings could significantly improve its activity of antioxidant enzyme system to defense ROS caused by stress of high temperature and drought,thus they had outstanding ability of resistance to high temperature and drought.But the degree increased of the antioxidant enzymes activity was limited,when the stress time extended or stress degree increased,reactive oxygen accumulated,the antioxidant enzyme system were destroyed and the activity decreased,so the plants hurt by ROS finally.

References:

[1]LOW P S,MERIDA J R.The oxidative burst in plant defense:Function and signal transduction[J].Physiologia Plantarum,1996,96(3):533-542.