Effects of Exogenous Hormone IAA, GA3 and NAA on Flowering, Fruiting and Seed Characteristics of Alfalfa

doi:10.11924/j.issn.1000-6850.casb14120199

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (14): 1-7.doi: 10.11924/j.issn.1000-6850.casb14120199

Special Issue: 生物技术

Effects of Exogenous Hormone IAA, GA₃ and NAA on Flowering,
Fruiting and Seed Characteristics of Alfalfa

Wang Yuxiang¹, Chang Chong², Chen Shuming¹, Zhang Bo¹

(¹Key Laboratory of Grassland Resource and Ecology of Xinjiang, Xinjiang Agricultural University, Urumqi 830052; ²Changji Grassland Station, Changji Xinjiang 831100)

Received:2014-12-30 Revised:2015-04-08 Accepted:2015-03-26 Online:2015-06-02 Published:2015-06-02

Abstract

Abstract: To found the influence of exogenous hormones on seed yield and seed characteristics, and provide reference for rational use of exogenous hormones in alfalfa seed production, Medicago sativa L ‘Xinmu No.4’ was used as the material and exogenous hormone IAA, GA₃ and NAA at different concentrations were sprayed. Effects of different exogenous hormones on blossom and fruiting characteristics of alfalfa were studied by measuring the floral traits, sit pod rate, seed yield and seed characteristics and so on. The results showed that exogenous hormone had great influence on floral traits, sit pod rate and seed characteristics of alfalfa. IAA could cause the decrease of floret number, pod number and 1000 grain weight. But the proper concentration of IAA could improve sit pod rate, seed number per pod and the quality and yield of seed. High concentration of GA₃ could increase pollen weight and improve pollen viability. However, pod rate, 1000 grain weight and seed yield of alfalfa sprayed with high concentration of GA₃ were lower than those in CK. NAA could reduce pollen viability. Seed yield, germination potential, germination rate and seedling height of alfalfa sprayed with NAA were lower than those in CK. Comprehensive analysis showed that exogenous hormones IAA could improve the sit pod rate and increase seed yield of alfalfa, but GA₃ and NAA could decrease the sit pod rate and seed yield of alfalfa.

Wang Yuxiang,Chang Chong,Chen Shuming and Zhang Bo. Effects of Exogenous Hormone IAA, GA₃ and NAA on Flowering,
Fruiting and Seed Characteristics of Alfalfa[J]. Chinese Agricultural Science Bulletin, 2015, 31(14): 1-7.

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Effects of Exogenous Hormone IAA, GA₃ and NAA on Flowering,
Fruiting and Seed Characteristics of Alfalfa

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