Journal of Tianjin Agricultural University ›› 2018, Vol. 25 ›› Issue (3): 29-33.doi: 10.19640/j.cnki.jtau.2018.03.006

• Researches and Scientific Notes • Previous Articles     Next Articles

Analysis of peroxidase isoenzymes characteristics in salt-tolerant callus of alfalfa mutants

YANG Jing-hui1a,1b, ZHOU Yi-ni1a, HUANG Wei-zi1a, LIU Yan-jun1a,1b, WU Nan1c, LU Yun-hui2   

  1. 1. Tianjin Agricultural University a. College of Horticulture and Landscape, b. Engineering Technology Center for Plant Tissue Culture and Mutation Breeding, c. College of Engineering and Technology, Tianjin 300384, China;
    2. Tianjin LÜYIN Landscape and Ecology Construction Co., Ltd, Tianjin 300384, China
  • Received:2017-03-24 Online:2018-09-20 Published:2019-11-12

Abstract: Alfalfa is a kind of high economic value crop. In order to understand the differences between salt-tolerant mutant callus (ST mutant) and common variety callus (CK) of alfalfa, the characteristics of peroxidase isoenzymes type and the content of isozyme were compared between the CK and ST mutant in two development stages of the mutant callus. The results showed that there were seven zymogram bands(p1-p7) in the CK, while there were only five zymogram bands in ST mutant with lack of two bands in Rf 0.430 and Rf 0.733. The similarity coefficient of the zymogram was 0.833. The chromaticity and band width of the main isoenzyme bands p1 (Rf 0.147), p2 (Rf 0.263) and p7 (Rf 0.864) of green ST mutant callus were similar with that of CK. It indicated that their major genes were consistent. The analysis of isoenzyme activity showed that the isoenzyme content of yellow ST mutant callus was the lowest in 5 common isoenzyme bands except for p2 band. The content of p1 and p3 bands with short mobility was the highest in CK, while the content of p4 and p7 with large mobility was the highest in green ST mutant. The total content of isoenzymes was the highest (56.645 0 mg/mL) in CK, green ST Mutant was in the midium (49.653 0 mg/mL) and yellow ST mutant was the least in (42.806 0 mg/mL). In conclusion, the less isoenzyme bands of ST mutant indicated a variation in the genetic background.

Key words: alfalfa, salt tolerance, mutant, callus, peroxidase isoenzymes

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