|Table of Contents|

Effects of Soil Salinity Stress on Tomato Growth,Ion Homeostasis and ROS Scavenging Ability

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2023年07
Page:
9-17
Research Field:
Publishing date:

Info

Title:
Effects of Soil Salinity Stress on Tomato Growth,Ion Homeostasis and ROS Scavenging Ability
Author(s):
CUI Hongxin; CHAI Yaqian; GUAN Sihui; WAN Wenliang; LIU Huiying; DIAO Ming
(College of Agronomy,Shihezi University/Key Laboratory of Characteristic Fruit and Vegetable Cultivation Physiology and Germplasm Resource Utilization Corps,Xinjiang Production and Construction Corps,Shihezi,Xinjiang 832003)
Keywords:
tomato saline stress; ion balance; antioxidant system
PACS:
-
DOI:
10.11937/bfyy.20223329
Abstract:
Taking C2 and C5 tomato germplasm with different resistance as test materials,three saline-alkali treatments with different stress levels were set up by pot culture.The effects of different saline-alkali levels on the growth,ion balance and ROS scavenging capacity of two tomato varieties and their relationship with resistance were studied,in order to clarify their salt-alkali tolerance mechanism and provide reference for further comprehensive analysis of salt-alkali tolerance mechanism and salt-alkali tolerance breeding of tomato.The results showed that saline-alkali stress inhibited the growth of tomato phenotype,and in terms of physiological response,saline-alkali stress perocidated membrane lipids by increasing H2O2 content,superoxide anion production rate and malondialdehyde content,and tomatoes maintained normal physiological activities of plants by increasing antioxidant enzyme activity to clear ROS to adapt to the stress environment.Saline-alkali stress inhibited the absorption of K+,Ca2+,Mg2+,reduced K+/Na+,Ca2+/Na+,Mg2+/Na+,affected cell membrane integrity and protein synthesis by forcing tomatoes to absorb Na+.C5 remove ROS in time to adapt to stress environment by increasing antioxidant enzyme activity by higher magnitude,increase the absorption of Ca2+,K+,Mg2+ ions in the aboveground part,and reduced the ion toxicity caused by excessive absorption of Na+ ions to adapt to the environment.The above results showed that C5 cultivar exhibits more saline resistance than C2 by enhancing antioxidant enzyme activity and strong K+/Na+,Ca2+/Na+,Mg2+/Na+ to alleviate osmotic stress and reactive oxygen species damage caused by saline stress.

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Last Update: 2023-04-27