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Citation:

Dynamic Changes of Endogenous Hormones in Lateral Buds of Populus yunnanensis during Different Seasons

  • Received Date: 2013-08-27
  • In order to understand the content changes of endogenous hormones in lateral buds of Populus yunnanensis during different seasons, the lateral buds collected from stems of three-year old cuttings of P. yunnanensis were used as materials, contents of ABA, IAA and ZR in the lateral buds in the autumn, winter and spring were detected by enzyme-linked immunosorbent assays (ELISA). The results indicated that the contents of ABA and IAA were first decreased and then increased while the contents of ZR increased gradually, and the values of the three kinds of endogenous hormones reached maximum in spring. The content of each endogenous hormone among different seasons was different significantly. However, the ratio changes of ZR/ABA, ZR/IAA and ZR/(ABA+IAA) were first increased and then decreased, and all reached the maximum in winter, which were significantly higher than that in autumn and srping.
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Dynamic Changes of Endogenous Hormones in Lateral Buds of Populus yunnanensis during Different Seasons

  • 1. Key Laboratory for Forest Resources Conservation and Use in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, Yunnan, China
  • 2. Key Laboratory of Biodiversity Conservation in Southwest China, State Forestry Administration, Southwest Forestry University, Kunming 650224, Yunnan, China

Abstract: In order to understand the content changes of endogenous hormones in lateral buds of Populus yunnanensis during different seasons, the lateral buds collected from stems of three-year old cuttings of P. yunnanensis were used as materials, contents of ABA, IAA and ZR in the lateral buds in the autumn, winter and spring were detected by enzyme-linked immunosorbent assays (ELISA). The results indicated that the contents of ABA and IAA were first decreased and then increased while the contents of ZR increased gradually, and the values of the three kinds of endogenous hormones reached maximum in spring. The content of each endogenous hormone among different seasons was different significantly. However, the ratio changes of ZR/ABA, ZR/IAA and ZR/(ABA+IAA) were first increased and then decreased, and all reached the maximum in winter, which were significantly higher than that in autumn and srping.

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