|Table of Contents|

Effects of Exogenous Substances on Physiological Property of Watermelon Seedling Under Low Temperature Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2021年18
Page:
29-35
Research Field:
Publishing date:

Info

Title:
Effects of Exogenous Substances on Physiological Property of Watermelon Seedling Under Low Temperature Stress
Author(s):
ZHAO Zhan1HOU Shengcan2WANG Xiaoting1LIU Fengli1HUO Zhibang2YANG Hua1
(1.College of Information Engineering,Kaifeng University/Kaifeng Agricultural Internet of Tings Technology Center,Kaifeng,Henan 475004;2.Watermelon Institute,Kaifeng Academy of Agriculture and Forestry,Kaifeng,Henan 475004)
Keywords:
seedlingexogenous substanceslow temperature stressphysiological property
PACS:
-
DOI:
10.11937/bfyy.20210508
Abstract:
The watermelon variety ‘B4’ was selected as material to investigate the effect of salicylic acid (SA) and brassinolide (BR) on seedling physiological characteristics of watermelon under low temperature stress.Six different concentrations of SA (0.01、0.1、0.5、1.0、2.5、5.0 mmol·L-1) and four different concentrations of BR (0.005、0.05、0.5、5.0 mg·L-1) were set up to spray on the leaf surface,respectively.In order to elucidate the physiological mechanism of exogenous hormones regulating the growth and development and improving cold tolerance of watermelon seedlings under cold stress,and provide a technical referance for the rational use of SA and BR in the cultivation of watermelon under low temperature stress.The results indicated that the relative malondial dehyde(MDA) content of watermelon leaf decreased firstly and then increased,while the superoxide dismutase (SOD) activity,peroxidase (POD) activity and soluble protein content increased firsty and then decreased with the increase of SA and BR spraying concentrations under low temperature stress.The optimal concentrations of SA and BR to spray watermelon seedlings were 0.5 mmol·L-1and 0.05 mg·L-1,respectively.In addition,the SOD activity,POD activity and soluble protein content could be increased significantly,while the MDA content decreased significantly after a period of low temperature treatment.The SOD activity,POD activity and soluble protein content showed a trend of gradual decrease,and the MDA content increased gradually with the extension of low temperature treatment time.The treatment effect of SA was the best on day 0.5 of low temperature stress, while that of BR was the best on day 1.5.

References:

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Last Update: 2021-12-21