Characterization of Growth-Retardant Effects on Vegetative Growth of Date Palm Seedlings

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• 作者：Yuval Cohen (1)
  Dagan D. Aloni (1)
  Uria Adur (1)
  Hila Hazon (1)
  Joshua D. Klein (2)
  
• 关键词：Apical meristem ; Leaf development ; Paclobutrazol ; Phoenix dactylifera L. ; Uniconazole ; P
• 刊名：Journal of Plant Growth Regulation
• 出版年：2013
• 出版时间：September 2013
• 年：2013
• 卷：32
• 期：3
• 页码：533-541
• 全文大小：1995KB
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• 作者单位：Yuval Cohen (1)
  Dagan D. Aloni (1)
  Uria Adur (1)
  Hila Hazon (1)
  Joshua D. Klein (2)
  
  1. Department of Fruit Tree Sciences, Volcani Research Center, Agriculture Research Organization, 50250, Bet Dagan, Israel
  2. Department of Agronomy and Natural Resources, Volcani Research Center, Agriculture Research Organization, 50250, Bet Dagan, Israel
  

文摘

The leaves, inflorescences, and fruit bunches of date palm trees develop at the crown, which is the apex of a single trunk that can be up to 25?m tall. Because palm trees are monocots, the leaves and inflorescences are generated deep within the trunk from a single meristem—the palm heart—and are inaccessible for direct bioregulator treatments. We followed the effects of two growth regulators, paclobutrazol and uniconazole-P, on the vegetative growth of young date palm seedlings. Both growth regulators constrained the elongation rate of the leaves and reduced the leaf length. Microscopic analysis of dissected palm hearts revealed that the growth retardants did not affect the generation of new leaves. However, the treatments did change the dimensions of the developing embryonic leaves as well as the shape of the apical meristem. The results suggest the possible future use of growth retardants to reduce trunk height, enabling cheaper, safer, and more efficient management of date palm trees.