A PHYB-PIF4-auxin module promotes tomato graft formation in response to elevated ambient temperature

文献类型： 外文期刊

第一作者： Meng, Xianmin

作者： Meng, Xianmin;Zhang, Feng;Shang, Qingmao;Meng, Xianmin;Yang, Wencai

作者机构：

关键词： Graft formation; Tomato; Temperature; Vascular; Auxin

期刊名称：HORTICULTURAL PLANT JOURNAL （ 影响因子：6.2； 五年影响因子：6.1 ）

ISSN： 2095-9885

年卷期： 2025 年 11 卷 1 期

页码：

收录情况： SCI

摘要： Grafting is an effective technique for increasing the resistance of vegetables to biotic and abiotic stresses. It has been widely applied to produce solanaceous and melon vegetables. Temperature is an important external factor affecting graft formation. However, the molecular mechanism by which external ambient temperature affects tomato graft formation remains unclear. In this study, we demonstrated that elevating ambient temperature during grafting to 35 degrees C for more than 24 h after grafting accelerated vascular reconnection. We generated self- or heterografted combinations between phyB1B 2 and pif4 loss-of-function mutant and wild-type plants, and were mutants unresponsive to graft formation at elevated ambient temperature. In addition, elevated ambient temperature induced SlPIF 4 expression during grafting. SlPIF 4 directly binds the promoters of auxin biosynthesis genes SlYUCCAs and activates their expression. Further investigation revealed auxin accumulation in the graft junction under elevated ambient temperature. The results illuminate the mechanism by which the PHYB-PIF4-auxin module promotes tomato graft formation in response to elevated ambient temperature.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序