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คณะเกษตรศาสตร์ มหาวิทยาลัยเชียงใหม่

 

  ISSN: 0857-0841 (Print)
  ISSN: 2630-029X (Online)
 


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"Article Journal of Agriculture"
Volume 34 Issue 2 May 2018 , ISSN 0857-0841
Title. : Effects of Girdling, Foliar Fertilizer and Gibberellin Biosynthesis Inhibitors on Changes of Plant Hormones Relating to Flowering of Lychee cv. Hong Huay on Highland
Author : Nudee Charoenkit, Korawan Sringarm, Pittaya Sruamsiri and Daruni Naphrom
Page : 167-178
index word : ลิ้นจี่(Lychee) การชักนำการออกดอก(flower induction) ELISA ออกซิน(auxin) ไซโตไคนิน(cytokinins)
Abstract:
The study aims to compare the effect of two gibberellin biosynthesis inhibitors; paclobutrazol and mepiquat chloride on flowering of lychee plants grown on highland (1200 masl) in Chiang Mai province and to analyze the hormonal changes during flower bud development. The experiment was conducted during March to July 2013 with completely randomized design (CRD) consisting of 5 treatments and 5 replications, whereas 1 tree per replication was used. The treatments in this study were 1) control (no treatment), 2) girdling plus foliar fertilizer (0-52-34) at 1% and ethephon at 400 mg/l; 3) girdling plus foliar fertilizer (0-52-34) with ethephon, and paclobutrazol at 3000 mg/l, 4) girdling plus foliar fertilizer (0-52-34) with ethephon, and mepiquat chloride at 2500 mg/l, 5) girdling plus foliar fertilizer (0-52-34) with a combination of ethephon, paclobutrazol, and mepiquat chloride. The result showed that treatment 5 (the combination of girdling plus foliar fertilizer (0-52-34), ethephon, paclobutrazol, and mepiquat chloride) gave the highest percentage of flowering even under warm temperature of July. The treatment could inhibit flushing, decrease auxin accumulation, but promote biosynthesis and transportation of cytokinins (iP/iPA and Z/Zr) in leaves and apical buds, which consequently induce flowering.
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