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Effects of arbuscular mycorrhizal fungus on the growth and physiological salt tolerance parameters of Carthamus tinctorius seedlings under salt stress.

XU Yao, FAN Yan, YU Yun-he, XU Cai-yun, GE Ying**   

  1. (College of Natural Resources and Environmental Sciences, Jiangsu Provincial Key Laboratory of Marine Biology, Nanjing Agricultural University, Nanjing 210095, China)
  • Online:2014-12-10 Published:2014-12-10

Abstract:

A pot experiment was conducted to investigate the impact of arbuscular mycorrhizal fungus (AMF) Glomus mosseae inoculation on the growth and physiological indicators of safflower (Carthamus tinctorius) under NaCl stress. The results showed that AMF inoculation significantly increased the root dry weight and chlorophyll content and reduced the accumulation of MDA of safflower under the salt stress. Compared with noninoculation, the AMF inoculation significantly enhanced the production of proline and soluble sugar while improved the total antioxidant capacity (T-AOC) in the leaves under salt stress. In addition, inoculating AMF promoted the uptake of mineral nutrients such as P and Mg. Under the treatment with the high salt level (3‰ NaCl), the uptake of Na+ was significantly reduced and leaf K+ concentration was increased in the AMFcolonized safflower. Therefore, G. mosseae reduced salt interferences on the chlorophyll synthesis and increased chlorophyll content; meanwhile it alleviated the salt stress on safflower plants by raising the content of osmotic adjustment matter, boosting mineral elements uptake, decreasing the MDA content, and lowering Na+ absorption under high salinity.
 
 

Key words: soil respiration, land restoration, soil bulk density, microaggregates, maize yield