Effect of exogenous calcium on root growth and endogenous hormone contents in pineapple seedlings

文献类型： 外文期刊

第一作者： Wei, Changbin

作者： Wei, Changbin;Sun, Guangming;He, Yingdui;Li, Ruimei

作者机构：

关键词： Ananas comosus;root growth;root activity;root physiology;endogenous hormone

期刊名称：ENVIRONMENTAL ENGINEERING, PTS 1-4

ISSN： 1022-6680

年卷期： 2014 年 864-867 卷

页码：

收录情况： SCI

摘要： As an essential element, calcium plays a key role in plant development. The present study aimed at assessing the effects of exogenous calcium on root activity, plant growth and endogenous hormone contents in pineapple seedlings. Major experimental methods included hydroponic culture with six concentrations (0, 5, 10, 20, 40, 80 mg/L) of CaCl2 and the use of high performance liquid chromatography (HPLC) for its endogenous hormone contents. After cultivating for 48 days, the seedlings were sampled and the reduction of TTC (2,3,5-triphenyitetrazolium chloride) method was determined to assess the root activity, and the determination of endogenous hormone contents was carried out by HPLC. The results showed that the shoot fresh weight, the root activity, root length and root weight increased significantly in response to the 20 mg/L Ca2+ treatment, and all these parameters seemed to be suppressed at higher Ca2+ concentrations. The contents of endogenous hormone ZT, GA(3) and IAA were evidently higher at 40 mg/L Ca2+, with ZT, GA(3) and IAA reach values as high as 2.31, 31.48 and 16.57 mu g/g, respectively, while the highest concentration of ABA ( 0.026 mu g/g) appeared at 5 mg/IL Ca2+ concentration.

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