Sucrose preferentially promotes expression of OsWRKY7 and OsPR10a to enhance defense response to blast fungus in rice

• DOI: 10.3389/fpls.2023.1117023
• Publication Date: 2023-01-27T06:51:02Z
• Authors: Win Tun; Jinmi Yoon; Kieu Thi Xuan Vo; Lae-Hyeon Cho; Trung Viet Hoang; Xin Peng; Eui-Jung Kim; Kay Tha Ye Soe Win; Sang-Won Lee; Ki-Hong Jung; Jong-Seong Jeon; Gynheung An
• Keywords: 0106 biological sciences; 2. Zero hunger; rice; Plant culture; sucrose; Magnaporthe oryzae; OsPR10a; Plant Science; OsWRKY7; 01 natural sciences; SB1-1110

Sucrose controls various developmental and metabolic processes in plants. It also functions as a signaling molecule the synthesis of carbohydrates, storage proteins, anthocyanins, well floral induction defense response. We found that sucrose preferentially induced OsWRKY7 , whereas other sugars (such mannitol, glucose, fructose, galactose, maltose) did not have same effect. A hexokinase inhibitor mannoheptulose block effect sucrose, which is consequently thought to function directly. MG132 inhibited induction, suggesting repressor upstream degraded by 26S proteasome pathway. The 3-kb promoter sequence was luciferase system. Knockout mutants were more sensitive rice blast fungus Magnaporthe oryzae overexpression enhanced resistance, indicating this gene positive regulator plant against pathogen. activity driven OsPR10a transcription factor bound region directly expression . conclude promotes transcript level thereby increasing for response rice.