|Table of Contents|

Physiological and Biochemical Responses of Jujube Under Different Salt Stress and Comprehensive Evaluation

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2025年5
Page:
39-47
Research Field:
Publishing date:

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Title:
Physiological and Biochemical Responses of Jujube Under Different Salt Stress and Comprehensive Evaluation
Author(s):
PEI Xiangli1; HAN Ce2; LIU Hongfei1; CONG Xin1; XU Lirong1; XU Zhenghe1
(1.School of Water Conservancy and Environment,University of Jinan，Jinan,Shandong 250022;2.Project Management Center of National Oil Pipeline Network Group Eastern Crude Oil Transportation Co.Ltd.，Xuzhou,Jiangsu 221008)
Keywords:
jujube; brackish water irrigation; physiological and biochemical response; principal component analysis
PACS:
S 665.1
DOI:
10.11937/bfyy.20243488
Abstract:
Taking jujube as the test material，the effects of five mineralization levels (1,2,3,4 g·L-1 and 5 g·L-1) of brackish water irrigation on the relative chlorophyll content，proline content，malondialdehyde content，endogenous hormone content and leaf protective enzyme activity of jujube leaves were studied in a large-scale field experiment，and the principal component analysis was used to identify physiological and biochemical indexes that characterize the salt tolerance of jujube.The main component analysis was used to identify the physiological and biochemical indexes that characterize the salinity tolerance of jujube，in order to provide reference for exploring the physiological and biochemical responses of jujube under irrigation with brackish water of different mineralization degrees，and revealing its adaptive mechanism to salt stress.The results showed that with the increase of irrigation water mineralization and the advancement of fertility period，the relative chlorophyll and abscisic acid content showed a trend of increasing and then decreasing，the proline content and malondialdehyde content showed a general trend of increasing，while the content of gibberellin and indole acetic acid showed a trend of decreasing；under the same mineralization，the activities of superoxide dismutase，peroxidase，catalase and hydrogen peroxide dismutase increased with the advancement of the fertility period；at different fertility periods，the activities of the contents of gibberellin and indoleacetic acid as well as the activities of superoxide dismutase，peroxidase and catalase showed different trends with the increase of irrigation water mineralization.In the comprehensive evaluation of physiological and biochemical responses of jujube to salt stress，2 principal components (5 indexes) were extracted by principal component analysis，which could be used as the comprehensive evaluation indexes of salinity tolerance of jujube.In brackish water mineralization not more than 3 g·L-1，jujube could resist salt stress by increasing its own proline and abscisic acid content，improving leaf protective enzyme activity，and decreasing gibberellin and indoleacetic acid content，showing a certain degree of salinity tolerance；however，more than 3 g·L-1，jujube enzyme activity was inhibited，hormone synthesis was blocked，which in turn affected the regulatory mechanismin the body；proline，malondialdehyde content，and proline，malondialdehyde content and the activities of superoxide dismutase，peroxidase and catalase could be used as the key indexes for the evaluation of salt tolerance in jujube.

References:

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Last Update: 2025-03-14