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Bulletin of Botanical Research ›› 2016, Vol. 36 ›› Issue (5): 760-767.doi: 10.7525/j.issn.1673-5102.2016.05.018

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Influence of Endogenous IAA and GA3 on in vitro Lily Seedling Growth

YANG Liu1,2, WANG Le1,2, XIE Zhong-Kui1, GUO Zhi-Hong1, ZHANG Yu-Bao1   

  1. 1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000;
    2. University of Chinese Academy of Sciences, Beijing 100049
  • Received:2016-05-08 Online:2016-09-15 Published:2016-09-27
  • Supported by:
    The National Natural Science Foundation of China(31201651);The Ningxia Agricultural Comprehensive Development Office(NTKJ2015-05-01)

Abstract: The in vitro seedlings of Lilium oriental ‘Sorbonne’ were used to study the response of plants to exogenous IAA and its inhibitor (2,3,5-Triiodobenzoic acid, TIBA), including the growth of stems, leaves and roots, and the dynamic change of endogenous hormones was analyzed by HPLC. The data showed that 10 mg·L-1 IAA have the best significant role on growth of stems, leaves and roots simultaneously while 40 mg·L-1 IAA and TIBA treatments inhibited growth significantly. By the hormone analysis, the endogenous hormones was influenced by exogenous IAA and TIBA application, the effect of IAA on growth was achieved probably by endogenous hormones regulation. Analysis based on the growth and the change of endogenous hormones revealed that higher level of endogenous IAA and lower level of GA3 were disadvantageous for growth, and endogenous IAA and GA3 played optimal role in their optimum concentrations. Endogenous Zeatin perhaps did not take part in the regulation of seedling growth. These results would be helpful in the rational use of exogenous hormones in lily planting and useful to improve economic benefit of growers.

Key words: Lilies, IAA, growth, endogenous hormones

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