Journal of Guangxi Normal University(Natural Science Edition) ›› 2019, Vol. 37 ›› Issue (3): 148-155.doi: 10.16088/j.issn.1001-6600.2019.03.017

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Responses of Male and Female Flower Differentiation of Jatropha curcas L. to 4 Exogenous Hormones

LIU Jiming*,TONG Bingli,LI Lixia,HE Xu,CHEN Jingzhong,HUANG Xiaolong   

  1. College of Forestry, Guizhou University, Guiyang Guizhou 550025, China
  • Online:2019-07-12 Published:2019-07-12

Abstract: In order to explore the effect of hormones on flower bud differentiation of Jatropha curcas L., the best hormone and concentration to induce female flower differentiation were sought to improve the ratio of male to female.The 4 year old J. curcas L. were used as the research object. 4 kinds of hormone (IAA, 6-BA, NAA, Ethephon) were used to induce the J. curcas L. in flower bud stage to determine the best hormone type and concentration ratio for the induction effect of the J. curcas L. 4 hormones have a certain effect on the female J. curcas L.: the optimum concentration of IAA is 60 mg/L,the highest induction rate for the female flower of J. curcas L. is up to 70.97%; the optimum concentration of NAA is 60 mg/L, and the highest induction rate for the female flower of J. curcas L. is up to 54.84% (mainly to inhibit the male flower differentiation and increase the male and female ratio); the optimum concentration of 6-BA is 60 mg/L, and the induction rate of J. curcas L. was 20%; the optimum concentration of Ethephon was 1 440 mg/L.The highest induction rate for female flowers was 41.94%.After IAA treatment, the fruit set rate of J. curcas L.reached 98.83%, while the seed quality was improved and the seed oil content did not increase significantly. IAA is the most suitable hormone for improving the male and female ratio of J. curcas L. with 60 mg/L. The ratio of male and female to male and male is 1∶12.0, and the rate of fruit sitting is 49.96%.

Key words: Jatropha curcas L.;male and female ratio;IAA;6-BA;NAA;Ethephon

CLC Number: 

  • S565.9
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