邵建辉;马春花;祖艳群;李元;

• 1:云南农业大学农业生物多样性与病虫害控制教育部重点实验室
• 2:云南农业大学园林园艺学院
• 3:云南农业大学资源与环境学院

摘要(Abstract)：

【目的】研究植物诱抗剂BTH对葡萄果实花色素苷生物合成、着色和品质的影响。【方法】以‘红地球’葡萄植株为试材,在葡萄果实转色初期对果穗喷施30~120 mg·L-1的BTH溶液,定期采样测定葡萄果实的形态、色度、花色素苷和糖酸累积等品质特征的变化。【结果】BTH处理‘红地球’葡萄果实的颜色指数CIRG和总花色素苷含量均得到显著提高,处理效果依次为60 mg·L-1>120 mg·L-1>30 mg·L-1;参与花色素苷生物合成的PAL、CHS1、CHS2、CHI1、CHI2、F3’H、F3H1、F3H2、DFR、LDOX、UFGT-2和Vvmyby A1等基因和转录因子的相对表达量显著提高,表明BTH诱导葡萄花色素苷含量的增加与花色素苷生物合成途径相关基因的上调表达有关;F3’5’H基因显著下调表达,且花色素苷单体主要以F3’H支路产物矢车菊素-3-O-葡萄糖苷(Cy)和芍药素-3-O-葡萄糖苷(Pn)为主,F3’5’H支路产物锦葵素-3-O-葡萄糖苷(Mv)、矮牵牛素-3-O-葡萄糖苷(Pt)和飞燕草素-3-O-葡萄糖苷(Dp)含量极少,据此推测BTH处理‘红地球’葡萄可能主要通过F3’H支路合成花色素苷。BTH处理使葡萄果实中可溶性固形物含量显著提高,可滴定酸含量显著下降,固酸比(SSC/TA)显著提高;60 mg·L-1BTH处理还对提高葡萄果实的可溶性总糖含量有显著效果;除120mg·L-1BTH处理导致葡萄果实横径变小外,其他浓度处理对葡萄果实形态均无显著影响。【结论】‘红地球’葡萄转色初期喷施一定浓度的BTH溶液可显著促进避雨栽培条件下葡萄的着色和转熟,并提高果实品质,且以60 mg·L-1BTH处理效果最好。

关键词(KeyWords)： ‘红地球’葡萄;BTH;转色期;着色;花色素苷;果实品质

Abstract:

Keywords:

基金项目(Foundation): 公益性行业(农业)科研专项(201203035);; 云南农业大学科研启动资助项目(A2002161)

作者(Author): 邵建辉;马春花;祖艳群;李元;

Email:

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