Genetically engineered anthocyanin pathway for high health-promoting pigment production in eggplant

文献类型： 外文期刊

第一作者： Zhang, Yanjie

作者： Zhang, Yanjie;Chu, Guihua;Hu, Zongli;Gao, Qiong;Cui, Baolu;Chen, Guoping;Tian, Shibing;Wang, Bo

作者机构：

关键词： Eggplant;SmMYB1;Anthocyanin accumulation;HPLC-ESI-MS/MS;Transcriptional regulation;Freezing stress

期刊名称：MOLECULAR BREEDING （ 影响因子：2.6； 五年影响因子：2.7 ）

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收录情况： SCI

摘要： Anthocyanins, natural pigments with high antioxidant activities, are widely distributed in the plant kingdom and play important roles in various physiological processes. Much effort has been committed to enhancing the anthocyanin content of these health-promoting pigments in vegetables and grains, for their eye-catching colors and special nutrients. Previously, we reported that the SmMYB1 gene encoding a R2R3 MYB transcription factor participated in the regulation of anthocyanin biosynthesis in the peel of eggplant. In this work, we introduced SmMYB1 into a non-anthocyanin-accumulating egg-plant cultivar (Solanum aethiopicum group Gilo) via Agrobacterium-mediated transformation. Genetically engineered plants exhibited high concentrations of anthocyanin in leaves, petals, stamens, and fruit peels under normal growth conditions, especially in fruit flesh. Furthermore, highly methylated anthocyanins, malvidin 3-(p-coumaroyl) rhamnoside(glucoside)-5-glucoside and malvidin 3-(feruloyl)rhamnoside(glucoside)-5-glucoside, were separated from the purple fruit flesh and identified by HPLC-ESI-MS/MS. qRT-PCR analysis revealed that most anthocyanin structural genes were dramatically up-regulated in the tissues of transgenic lines compared with non-transformed plants. In addition, the transgenic seedlings had greater tolerance to freezing stress and better recovery under rewarming conditions. These results provide a good foundation for the breeding of new eggplant cultivars with more healthy agronomic traits in future studies.

分类号： Q94

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