|Table of Contents|

Effect of Abscisic Acid on Eco-physiological Characteristics of Cowpea Seedlings Under Low Temperature Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年07
Page:
49-53
Research Field:
Publishing date:

Info

Title:
Effect of Abscisic Acid on Eco-physiological Characteristics of Cowpea Seedlings Under Low Temperature Stress
Author(s):
XIANG Juan1; PAN Shaokun1; LU Ronghai1; YANG Jing2; LIN Lijin3; CHEN Ling1
(1.Institute of Horticulture,Chengdu Academy of Agriculture and Forestry Sciences,Chengdu,Sichuan 611130；2.Chengdu Science and Technology Service Center,Chengdu,Sichuan 610015；3.Institute of Pomology and Olericulture,Sichuan Agricultural University,Chengdu,Sichuan 611130)
Keywords:
abscisic acid (ABA); low temperature stress; cowpea seedlings; eco-physiology
PACS:
-
DOI:
10.11937/bfyy.20182998
Abstract:
The alleviating effect of exogenous abscisic acid (ABA) for vegetables under low temperature stress was studied via a pot experiment using cowpea seedlings to provide a reference for rational use of ABA to improve the cold resistance of vegetables.The cowpea seedlings were foliage sprayed with different concentrations ABA (0,10,30,40 mg?L-1),and the treatments were put under low temperature stress (10 ℃).The results showed that ABA pretreatment could increase the biomass,relative water content,photosynthetic pigment content,the contents of soluble protein,proline,soluble sugar,and antioxidant enzyme activities,decrease the relative conductivity,malondialdehyde content of cowpea seedlings to different degrees.When the ABA concentration was 10 mg?L-1,the biomass and relative water content significantly higher than the control,the contents of total chlorophyll and carotenoid increased by 15.22% and 20.47%,respectively,compared to control.The contents of soluble protein,proline,soluble sugar were significantly higher than the control,the activities of superoxide dismutase and catalase increased by 64.46% and 32.59%,respectively compared to control.The relative conductivity and malondialdehyde content were significantly reduced.In conclusion,foliage spraying with ABA could improve the cold resistance of cowpea seedlings and alleviate the stress of low temperature significantly,and the ABA of 10 mg?L-1 was the best.

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Last Update: 2019-05-05