%0 Journal Article
%T Growth and Physiological Responses of Picea asperata Seedlings to Long-term Abscisic Acid Application<br>长期喷施ABA对云杉幼苗生长和生理特性的影响
%A Chunzhang Zhao
%A Qing Liu
%A Xiaoqin Yao
%A Ming Wang
%A Liangchun Gong
%A <br>赵春章
%A 刘庆
%A 姚晓芹
%A 汪明
%A 龚良春
%J 植物学报
%D 2008
%I 
%X The paper describes the effects of long-term application of abscisic acid (ABA) at different concentrations in Picea as perata at the Maoxian Ecological Experimental Station of Chinese Academy of Sciences during a 5-year pot experiment. Longterm exogenous ABA application significantly affected the height and biomass (root,stem, and leaf weight); chlorophyll, osmoprotectant (proline, soluble sugar, soluble protein), and malonic dialdehyde (MDA) content; and antioxidative enzyme activity. ABA treatments at 5 mg.L-1, 10 mg.L-1 and 15 mg.L-1 significantly improved root weight, stem weight and total biomass; increased the soluble protein and proline content; and reduced MDA content in needles. However, the highest application of ABA (20 mg.L-1) caused a significant reduction in accumulation of chlorophyll, free proline and soluble sugar and a significant increase in MDA content in needles. These results suggest that the effects of exogenous ABA application on Picea asperata is concentration dependent, and longterm high exogenous ABA (20 mg.L-1 ) is unfavorable for plant growth. Moreover, the height, chlorophyll content, and activities of superoxide dismutase and ascorbate peroxidase were significantly reduced with application of exogenous ABA.
%K <br>ABA
%K 抗氧化酶
%K 生长
%K 渗透保护性物质
%K 粗枝云杉
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=97AE3D0EBF25E42C466FEF50E492F710&aid=A64E868B87AB530D695857AAA202EB29&yid=67289AFF6305E306&vid=C5154311167311FE&iid=38B194292C032A66&sid=03E56C113B4E5A88&eid=6490F0E20C4B41AD&journal_id=1674-3466&journal_name=植物学报&referenced_num=0&reference_num=30