中文摘要：由B型烟粉虱的侵扰诱发西葫芦银叶（SSL）的病因至今仍知之甚少。为了探明烟粉虱如何破坏西葫芦叶片并引起西葫芦银叶（SSL）现象，本文通过比较0-4个等级SSL叶片的叶绿素荧光参数和生化、形态和解剖学等方面，研究了SSL引起的变化以及西葫芦对B型烟粉虱侵扰的反应。研究结果表明，叶绿素荧光可作为一种针对恶劣环境条件尤其是害虫引起的植株胁迫进行早期诊断的方法，广泛用于大田研究。
外文摘要：The aetiology of squash silverleaf (SSL) induced by the infestation of Bemisia tabaci (Gennadius) 'biotype' B (B. tabaci-B) is poorly understood. To help to find out how B. tabaci destroys Cucurbita pepo L and induces SSL, changes induced by SSL and responses of C. pepo to B. tabaci-B infestation were studied by comparing chlorophyll fluorescence parameters and biochemical, morphological and anatomical aspects of grade 0-4 SSL leaves. The results showed that chlorophyll contents decreased and the chlorophyll a/b ratio increased with the increase of silvered leaf, which indicated that the decrease of chlorophyll contents led to silvered leaf. Anatomical observation showed that B. tabaci-B infestation changed the shape and arrangement of lower epidermis cells and spongy mesophyll cells. Moreover, air spaces appeared between upper epidermis and palisade tissue and in spongy tissue, which might be the cause of the increase in leaf thickness. Additionally, the altering of former spaces light reflection was another reason for leaf silvering. As response to B. tabaci-B infestation, the content of soluble proteins and soluble sugar decreased, and the content of Malondialdehyde (MDA) increased. Pearson correlation showed a significant correlation between fluorescence parameters (except a) and the other parameters measured in this study. The result also suggested that chlorophyll fluorescence can be widely used in field studies as an early diagnostic measure of stress in plant caused by adverse environmental conditions, especially by insect pests.
外文关键词：Bemisia tabaci 'biotype' B; Cucurbita pepo; Squash silverleaf; Chlorophyll fluorescence; Leaf morphology; Leaf anatomy
作者：Zhang, Jialei; Wang, Lanlan; Zheng, Yueping; 等
作者单位：浙江科技大学
期刊名称：SCIENTIA HORTICULTURAE
期刊影响因子：1.538
出版年份：2017
出版刊次：3
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