首页|The Effects of Arbuscular Mycorrhizal Fungi on Reactive Oxyradical Scavenging System of Tomato Under Salt Tolerance

The Effects of Arbuscular Mycorrhizal Fungi on Reactive Oxyradical Scavenging System of Tomato Under Salt Tolerance

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The effects of arbuscular mycorrhizal fungi (AMF),Glomus mosseae,on oxygen radical scavenging system of tomato under salt stress were studied in potted culture experiments.The response of tomato (Lycopersicon esculentum L.)cultivar Zhongza 9 seedlings with AMF inoculation and control to salt stress (0,0.5 and 1.0% NaCl solution,respectively)was investigated.The results showed that the salt stress significantly reduced the dry matter content of roots,stems and leaves,and also the leaf area as compared with the control treatment.However,arbuscular mycorrhizal-inoculated (AM)significantly improved the dry matter and the leaf area in the salt-stressed plants.The effect of AMF on dry matter was more pronounced in aerial biomass than in root biomass which might be due to AM colonization.The activities of SOD,POD,ASA-POD,and CAT in leaves and roots of mycorrhizal and non-mycorrhizal treatment of tomato plants were increased and had different rules under different NaCl concentrations (solution of 0,0.5 and 1% NaCl),but all enzymes had a rise in the beginning of treatment under salt stress conditions.The AMF did not change the rule of tomato itself under salt stress,but AMF increased these enzyme activities in different levels.The AMF treatment significantly increased SOD,POD and ASA-POD activities in leaves and roots,whereas it had little effects on CAT in root.O2(-) production rate and MDA content in leaves increased continuously,which showed a positive line correlation with salt stress concentration.O2(-) production rate and MDA content in tomato plants significantly decreased by AM treatment compared with nonmycorrhizal treatment.In conclusion,AM could alleviate the growth limitations imposed by saline conditions,and thereby play a very important role in promoting plant growth under salt stress in tomato.

arbuscular mycorrhizal fungi (AMF)osmoregulationsalt stresstomato

HUANG Zhi、HE Chao-xing、HE Zhong-qun、ZOU Zhi-rong、ZHANG Zhi-bin

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College of Horticulture,Northwest A&F University,Yangling 712100,P.R.China

Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,P.R.China

College of Horticulture,Sichuan Agricultural University,Ya'an 625014,P.R.China

This work was funded by the Chinese High Technology Research and Development ProgramNational Key Technology R&D Program of ChinaKey Laboratory of Horticultural Crops Genetic Improvement,Ministry of Agriculture,China

2006AA 10ZA212006BAD07B01

2010

农业科学学报(英文)
中国农业科学院农业信息研究所

农业科学学报(英文)

CSCD
影响因子：0.576
ISSN：2095-3119
年,卷(期)：2010.9(8)
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