Differential responses of double petal and multi petal jasmine to shading: II. Morphology, anatomy and physiology

文献类型： 外文期刊

第一作者： Deng, Yanming

作者： Deng, Yanming;Li, Congcong;Ye, Xiaoqing;Tang, Risheng;Shao, Qingsong;Li, Congcong

作者机构：

关键词： Antioxidant enzyme;Jasminum sambac;Leaf anatomy;Malondialdehyde;Plant morphology;Total soluble sugars

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN： 0304-4238

年卷期： 2012 年 144 卷

页码：

收录情况： SCI

摘要： We compare the morphological, anatomical, developmental and physiological and biochemical responses of a double petal (DP) type jasmine (Jasminum sambac Aiton) to shading with a multi petal (MP) one. In both types, plant height, internode length, leaf size and leaf relative water content were all increased by shading, while leaf tissue density, reproductive development and the number of flowers decreased. Shaded leaves produced fewer but larger mesophyll and vein vascular cells. The total protein contents in shaded leaves were higher than those in non-shaded leaves for a shading period of 21 d (DP type) and 14 d (MP type), but thereafter they fell below the levels found in leaves exposed to full sunlight. Under shading, both peroxidase (POD, EC 1.11.1.7) and superoxide dismutase (SOD. EC 1.15.1.1) activities were induced, catalase (CAT, EC 1.11.1.6) activity was repressed, and that of ascorbate peroxidase (APX, EC 1.11.1.11) was irregular. Total soluble sugar and malondialdehyde contents in both types were significantly reduced by shading. The results showed that DP jasmine overall tolerated shading better than the MP type, because of the former with more efficient photosynthetic and metabolic rates, reasonable allocation of photosynthates as well as higher contents of proteins and antioxidant enzymes. A moderate level and duration of shading (20-50% irradiance no longer than 28 d) was beneficial to jasmine plant growth, but extremely low (5% irradiance) and/or prolonged (>28 d) shading was detrimental to both vegetative growth and reproductive development and should be avoided, particularly in the plantation of MP type. (C) 2012 Elsevier B.V. All rights reserved.

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