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EFFECTS OF SALT AND ALKALI STRESS ON THE RESPIRATORY METABOLISM OF THE GERMINATING SEEDS OF MEDICAGO SATIVAL.

Li Jingxin Sun Guorong Wan Qinlin Li Jing Suo Shengxi (Department of Biology,Harbin Normal University,Harbin 150080)  
The apparent respiration intensity of the seeds of Medicago sativa L.which have been cultivated in the culture solution that contained different concentration of NaCl,NaHCO_3 and NaCO_3 was studied.The result showed that effects of different concentration of the same salt on apparent respiration intensity of the gen minating seeds that have been treated by inhibitors(Na_3PO_4,KCN,malonic acid and iodoacetic acid)were similar to that of the total respiration intensity.Because of being treated by different salt,the maximum respiration intensity of the germinating seeds appeared in which cultured in 500 ppm NaCl,1000ppm Na_2CO_3,125ppm NaHCO_2.There is a“salt respiration peak”in each salt solution in which the concentra- tion is 125pom.These indicated that the effects of different salts on the respiration metabolism were differ- ent.
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