张睿佳;李瑛;虞秀明;娄玉穗;许文平;张才喜;赵丽萍;王世平;

• 1:上海交通大学农业与生物学院

摘要(Abstract)：

【目的】探讨高温胁迫和外源油菜素内酯对鲜食葡萄光合和果实品质的影响。【方法】以3 a(年)生盆栽‘巨峰’葡萄为试材,连续高温胁迫20 d并喷施外源油菜素内酯(BR),测定葡萄叶片光合速率、叶绿素荧光参数、叶绿素含量及果实品质指标的变化。【结果】高温处理3 d即可显著降低叶片的净光合速率(Pn)、叶绿素含量、PSII实际光化学效率(ΦPSII)和光化学猝灭系数(q P),而初始荧光(Fo)显著高于对照。连续高温处理6 d,PSII最大光化学效率(Fv/Fm)开始下降。高温胁迫显著降低了果实的单粒质量、可滴定酸含量和果皮花色苷含量。高温处理20 d后,喷施BR的处理分别比未喷施处理的光合最大速率Amax、Fv/Fm、ΦPSII、q P和叶绿素含量均有提高,果皮花色苷含量为未喷施BR处理组的2.1倍。【结论】连续的高温胁迫会降低PSII反应中心活性,阻碍PSII的正常功能,抑制葡萄叶片的光合作用,影响果实品质。喷施外源BR可以有效缓解高温对葡萄叶片的光合伤害并促进果实着色。

关键词(KeyWords)： ‘巨峰’葡萄;高温胁迫;油菜素内酯;光合作用;果实品质

Abstract:

Keywords:

基金项目(Foundation): 国家葡萄产业技术体系资助(CARS-30-zp-07);; 上海果业产业技术体系(沪农科(2014)第7号)

作者(Author): 张睿佳;李瑛;虞秀明;娄玉穗;许文平;张才喜;赵丽萍;王世平;

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DOI:

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