Antioxidant and osmoregulation substance properties of flower buds in Platycodon grandiflorus male sterile lines

Abstract

Abstract: Male sterility is very important in the utilization of hybrid heterosis in Platycodon grandiflorus. The physiological and biochemical mechanisms of male sterile material, the contents of soluble sugar, free proline, soluble protein, and the activity of superoxide dismultase (SOD), peroxidase (POD), and catalase (CAT) in flower buds at different developmental stages of male sterile lines and viable lines were investigated. The results showed that: 1) The contents of soluble sugar, free proline, and soluble protein in flower buds at different developmental stages of male sterile lines was lower than those of viable lines. Free proline irreversibly increased in male sterile buds as flower buds developed, but its content in viable buds was lower. 2) The variation in activity of reactive oxygen species and scavenger enzymes was almost same between sterile buds and viable buds during bud development, whereas activities of SOD, POD, and CAT was higher in male sterile buds than in viable buds. 3) The malondialdehyde (MDA) content of male sterile buds was higher than that of viable buds at all times. High activity of reactive oxygen species, scavenger enzymes, high content of MDA and low content of free proline may be the results of male sterility in P. grandiflorus.

CLC Number:

Q945.5

LIU Zi-gang, YANG Ya-li, HU Tian-ming,WANG Yu-lin, XU-Rui, LEI Yan-ni, HE Jun. Antioxidant and osmoregulation substance properties of flower buds in Platycodon grandiflorus male sterile lines[J]. Acta Prataculturae Sinica, 2012, 21(2): 77-82.

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