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Comparative Analysis of Seven Endogenous Hormones in a Novel Dual-axillary Bud Mutant Genotype of Sugarcane

文献类型： 外文期刊

作者： Wickramasinghe, Kamal Priyananda 1 ; Mao, Jun 1 ; Xu, Chao-hua 1 ; Lin, Xiu-qin 1 ; Li, Xu-juan 1 ; Qin, Wei 1 ; Liu, Hong-bo 1 ; Liu, Xin-long 1 ; Mehdi, Faisal 1 ; Zhao, Pei-fang 1 ; Lu, Xin 1 ;

作者机构： 1.Natl Key Lab Biol Breeding Trop Crops, Kunming 650221, Yunnan, Peoples R China

2.Yunnan Acad Agr Sci, Yunnan Sugarcane Res Inst, Yunnan Key Lab Sugarcane Genet Improvement, Kaiyuan 661699, Yunnan, Peoples R China

3.Sugarcane Res Inst, Uda Walawe 70190, Sri Lanka

4.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Natl Key Lab Trop Crop Breeding, Haikou 571101, Peoples R China

关键词： Dual-axillary bud; ELISA technique; Endogenous hormones; Sugarcane; YZ 07-86; Zeatin riboside

期刊名称：SUGAR TECH （ 影响因子：1.8； 五年影响因子：1.8 ）

ISSN： 0972-1525

年卷期： 2024 年

页码：

收录情况： SCI

摘要： The sugarcane genotype YZ 07-86 is a distinct natural mutant with dual-axillary buds. Exploitation of this valuable trait in sugarcane breeding requires an understanding of the physiological mechanism of dual-axillary bud formation. This experiment determined the contents of indole-3-acetic acid (IAA), abscisic acid (ABA), gibberellins (GA(3) and GA(4)), and three cytokinins (CKs), namely isopentenyl adenosine (iPA), zeatin riboside (ZR), and dihydrozeatin riboside (DHZR), in the shoot apical meristem tissues of YZ 07-86 and its sister line YZ 07-87, which served as the control genotype. The field experiment followed a completely randomized design with three replications for each genotype. Sampling was done at 5-day intervals, starting 106 days after planting. The ELISA technique was used to measure the contents of endogenous hormones. The study revealed that the mean contents of IAA, GA(3), GA(4), DHZR, and iPA were not significantly different (P > 0.05) among the genotypes. Conversely, in YZ 07-86, the mean ZR content was significantly higher (P < 0.05), and the mean ABA content was significantly lower than in the control genotype. Moreover, the mean content ratios of ZR/IAA, ZR/ABA, ZR/GA(3), and ZR/GA(4) were also significantly higher in YZ 07-86. The study concludes that elevated ZR content and an increased ZR/ABA ratio directly contributes to dual-axillary bud formation in YZ 07-86, offering valuable insights for the advancement of sugarcane genotypes.

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