ISSN 2756-3685
International Journal of Enology and Viticulture Vol. 6 (6), pp. 001-008, June, 2019. © International Scholars Journals
Full Length Research Paper
The expression of VFL and VvTFL1 genes in relation to the effects of gibberellins in different organs of “Xiangfei” grapevine
Anyan Yao1, Yuyan Yang1, Kang Liao2, Lusheng Zhang1 and Jianfang Hu1*
1Laboratory of Pomology Cell and Molecular Biology, College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, P.R. China.
2Laboratory of Pomology Physiology and Molecular Biology, College of Horticulture, Xinjiang Agricultural University, Wulumuqi 830052, P.R. China.
Accepted 19 April, 2019
Abstract
The effects of gibberellins (GAs) on plant growth and the expression of VFL and VvTFL1 genes in different organs of “Xiangfei” grapevine (Vitis vinifera L.) were investigated. The endogenous GA content significantly increased in the apical bud, inflorescence and tendril after GA treatment of grapevine. The expression of the VFL gene was obviously reduced in the meristem of apical buds, tendrils with florets and small inflorescences after GA treatment, but VFL gene expression was clearly found during the middle and big inflorescence developmental stages. These results suggested that the exogenous GAs delayed floral development of grapevine by inhibiting VFL gene expression at the early stage of inflorescence development. VvTFL1 gene expression was detected in the meristem of apical bud and lateral bud, but not during the process of inflorescence development. After applying GAs on grapevine, VvTFL1 gene expression decreased in the apical bud. These results suggested that exogenous GA treatments might repress differentiation of the inflorescence meristem primordia by reducing VvTFL1 expression in the apical bud but have no effect on VvTFL1 expression during floral development.
Key words: Grapevine, VFL gene, VvTFL1 gene, gibberellins (GAs).