Li Xinyue, Guo Wei, Xu Mingyang, Zhao Jiaming, Wang Guan, Yuan Hui, Wang Aide
Key Laboratory of Fruit Postharvest Biology (Liaoning Province), Key Laboratory of Protected Horticulture (Ministry of Education), National & Local Joint Engineering Research Center of Northern Horticultural Facilities Design & Application Technology (Liaoning), College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China.
Institute of Soybean, Heilongjiang Academy of Agricultural Sciences, 368 Xuefu Road, Harbin, 150086, China.
Hortic Res. 2022 Jan 6;9:uhac156. doi: 10.1093/hr/uhac156. eCollection 2022.
The ripening of climacteric fruits is mainly controlled by the plant hormone ethylene. The regulatory effect of sucrose on ethylene biosynthesis in fruits remains unclear. Here we examined ethylene production in two Ussurian pear () varieties, 'Nanguo' (NG) pear and its bud sport variety (BNG), which has a higher sucrose content. We found that the peak of ethylene release occurred earlier in BNG fruit than in NG fruit during ripening. The expression of the transcription factor was higher in BNG fruit than in NG fruit, and was induced by sucrose treatment. Furthermore, PuWRKY31 bound to the promoters of ethylene biosynthetic genes and upregulated their transcription. Our findings suggest a mechanism by which sucrose regulates ethylene biosynthesis in pears.
跃变型果实的成熟主要受植物激素乙烯的调控。蔗糖对果实中乙烯生物合成的调节作用尚不清楚。在此，我们检测了两个秋子梨品种，即‘南果’（NG）梨及其芽变品种（BNG）（其蔗糖含量较高）的乙烯生成情况。我们发现，在成熟过程中，BNG果实乙烯释放高峰比NG果实出现得更早。转录因子 的表达在BNG果实中高于NG果实，且受蔗糖处理诱导。此外，PuWRKY31与乙烯生物合成基因的启动子结合并上调其转录。我们的研究结果揭示了蔗糖调控梨果实中乙烯生物合成的一种机制。
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