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HYBRID EVENT
September 08-10, 2025 | Valencia, Spain
GPMB 2025

Integrative analyses reveal the physiological and molecular role of prohexadione calcium in regulating salt tolerance in rice

Naijie Feng, Speaker at Plant Biology Conferences
Guangdong Ocean University, China
Title : Integrative analyses reveal the physiological and molecular role of prohexadione calcium in regulating salt tolerance in rice

Abstract:

Salinity stress severely restricts rice growth. Prohexadione calcium (Pro-Ca) modulation can effectively alleviate salt stress in rice. In this study, we explored the effects of Pro-Ca on enhancing salt tolerance in two rice varieties, IR29 and HD96-1. The results revealed that Pro-Ca markedly enhanced root and shoot morphological traits and improved plant biomass under salt stress. Chlorophyll a and b content were significantly increased, which improved photosynthetic capacity. Transcriptomic and metabolomic data showed that Pro-Ca significantly up-regulated the expression of genes involved in E3 ubiquitin ligases in IR29 and HD96-1 by 2.5-fold and 3-fold, respectively, thereby maintaining Na+ and K+ homeostasis by reducing Na+. Moreover, Pro-Ca treatment significantly down-regulated the expression of Lhcb1, Lhcb2, Lhcb3, Lhcb5, and Lhcb6 in IR29 under salt stress, which led to an increase in photosynthetic efficiency. Furthermore, salt stress + Pro-Ca significantly increased the A-AAR of IR29 and HD96-1 by 2.9-fold and 2.5-fold, respectively, and inhibited endogenous cytokinin synthesis and signal transduction, which promoted root growth. The current findings suggested that Pro-Ca effectively alleviated the harmful effects of salt stress on rice by maintaining abscisic acid content and by promoting oxylipin synthesis. This study provides a molecular basis for Pro-Ca to alleviate salt stress in rice.

Biography:

Professor Feng Naijie is a member of the South China Center of the National Salt-Tolerant Rice Technology Innovation Center. Her main research fields are the creation of chemical control products for crop stress resistance and disaster reduction, as well as the integration and demonstration promotion of technologies for improving crop quality and efficiency. She has successively presided over and participated in more than 30 national and provincial-level scientific research projects, published 4 academic monographs, and obtained 5 authorized invention patents. She have published over 150 academic papers as the first author or corresponding author in domestic and international journals.

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