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题名: The effects of enhanced UV-B radiation on growth, stomata, flavonoid and ABA content in cucumber leaves
作者: An, LZ(安黎哲); Wang, JH; Liu, YH; Tuo, C; Xu, SJ; Feng, HY; Wang, XL
收录类别: CPCI-S ; EI
出版日期: 2003
会议名称: Conference on Ultraviolet Ground- and Space-based Measurements, Models and Effects II
会议日期: 37554
会议地点: HANGZHOU, PEOPLES R CHINA
英文摘要: Cucumber plants (Cucumis sativus L. cv. Jinchun No 3) grown in a greenhouse were treated with three different biologically effective ultraviolet-B (UV-B) radiation levels: 1.28 kJ. m(-2) (CK), 8.82kJ.m(-2) (T1) and 12.6 kJ.m(-2) (T2). Irradiances corresponded to 8% and 21% reduction in stratospheric ozone in Lanzhou. Plants at three-leaf stage were irradiated 7 h daily for 25 days. The growth, stomata, flavonoid and ABA content in cucumber leaves exposed to 3 levels of UV-B radiation were determined in this paper. The results indicated that, compared with the control after 25 days UV-B radiation, RI of cucumber under T1 treatment is -18.0% and RI under T2 treatment is -48% mostly because of the reduce of leave area and dry weight accompanying with the increase of SLW; the rate of stomata closure under the treatments of T1 and T2 on the 6th day was up to respectively 70% and 89%, and amounted to 90% and 100% on the 18th day, and the guard cells in some stomata apparatus became permanent pores and lost their function at the same time; with the duration of UV-B radiation, the rise of the absorbance to ultraviolet light (305mn) showed the content increase of flavonoid; Abscisic acid( ABA) was determined by means of ELISA which showed that under the T1 treatment, the content of ABA was up to maximum to 510% higher than that of the control on the 21(st) day, meanwhile, under the treatment of T2, it was the highest on the 18th day to 680% of the control, and then had a decrease tendency on 21(st) day. The result still indicated that ABA accumulation could be induced by enhanced UV-B the radiation. The bigger was the dose of radiation, the higher was the accumulation of ABA. When intensity of UV-B radiation went beyond the degree of endurance of cucumber plants, ABA content descended then. Cucumber plants resist enhanced UV-B radiation by means of improving the contents of ABA and flavonoid. The increase of ABA content in cucumber leaves could lead to the stomata closure. Therefore, the changes of ABA content and absorbance, the rate of stoma closure in cucumber leaves were the adaptive mechanism to enhanced UV-B radiation.
关键词: response index (RI) ; stomata ; flavonoid ; abscisic acid (ABA) ; ultraviolet-B (UV-B) radiation ; Cucumis sativus L
作者部门: Lanzhou Univ, Sch Life Sci, Lanzhou 730000, Peoples R China
通讯作者: An, LZ (reprint author), Lanzhou Univ, Sch Life Sci, Lanzhou 730000, Peoples R China.
学科分类: Geology; Remote Sensing; Physics
会议录: ULTRAVIOLET GROUND- AND SPACE-BASED MEASUREMENTS, MODELS, AND EFFECTS II
卷号: 4896
页码: 223-231
出版者: SPIE
出版地: Bellingham
语种: 英语
DOI: 10.1117/12.468231
ISSN号: 0277-786X
WOS记录号: WOS:000184614300027
EI记录号: 2003407652769
IR记录号: WOS:000184614300027
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内容类型: 会议论文
URI标识: http://ir.lzu.edu.cn/handle/262010/184709
Appears in Collections:生命科学学院_会议论文

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Recommended Citation:
An, LZ,Wang, JH,Liu, YH,et al. The effects of enhanced UV-B radiation on growth, stomata, flavonoid and ABA content in cucumber leaves[C]. 见:Conference on Ultraviolet Ground- and Space-based Measurements, Models and Effects II. HANGZHOU, PEOPLES R CHINA. 37554.
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