|Table of Contents|

Effects of Salt-alkaline Stress on Physiological Characteristics of Salt Tolerance in Chieh-qua Seedlings

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2024年15
Page:
8-14
Research Field:
Publishing date:

Info

Title:
Effects of Salt-alkaline Stress on Physiological Characteristics of Salt Tolerance in Chieh-qua Seedlings
Author(s):
LU Panling1; DU Xuan1; WANG Ying1; ZHENG Ronghua2; TIAN Shoubo1; LIU Na1
(1.Horticultural Research Institute，Shanghai Academy of Agricultural Sciences/Shanghai Key Laboratory of Protected Horticultural Technology，Shanghai 201403；2.Shanghai Yibo Fruit and Vegetable Planting Professional Cooperative，Shanghai 201403)
Keywords:
chieh-qua; salt-alkaline stress; reactive oxygen species; osmotic regulation; chlorophyll fluorescence
PACS:
S 642
DOI:
10.11937/bfyy.20240347
Abstract:
Chieh-qua seedlings ‘Feicuida 1’ was selected as the experimental material，the method of hydroponics was adopted and different salt concentrations (0，25，50，75，100，125 mmol·L-1) were set up to observe and measure the physiological response of chieh-qua seedlings,in order to provide reference for the damage mechanism of alkaline salt stress on chieh-qua seedlings. The results showed that low concentrations of salt stress such as 25，50 mmol·L-1 had no obvious effect on the seedlings，but higher concentrations of salt stress caused damage to the photosynthetic system of the seedlings，and Y(Ⅱ)，ETR，qP，Fv/Fm increased significantly.In addition，the ROS content (O·〖TX--*9〗2 and H2O2) and the activities of various antioxidant enzymes were significantly up-regulated under high concentration salt stress.Salt stress also significantly increased MDA content and relative conductivity，which may be caused by excessive accumulation of ROS.Finally，the study also found that the high concentration of salt stress also promoted the significant increase of osmoregulatory substances such as Pro，soluble sugar and soluble protein.In conclusion，the damage of 25，50 mmol·L-1 salt solution was limited，but the salt concentration of 75 mmol·L-1 and above exceeded the tolerance range of chieh-qua seedlings.In addition，the chieh-qua could cope with salt stress by increasing photosynthetic heat dissipation，increasing antioxidant enzyme activity and increasing osmoregulator synthesis.

References:

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Last Update: 2024-08-23