Exogenous Calcium-Mediated Reinforcement of Cell Wall Represents a Pivotal Mechanism in Rice's Primed Defense Response Against Brown Planthopper Reproduction.

ABSTRACT: The plant cell wall serves as the primary structural barrier against herbivorous insect damage. Calcium ions (Ca²⁺) play a crucial role as a second messenger in plants. Exogenous calcium application has been demonstrated to enhance plant resistance to both biotic and abiotic stresses, thereby promoting sustainable crop production. This study investigates the mechanisms by which exogenous calcium induces resistance in rice. Our results show that calcium chloride (CaCl₂) promotes the biosynthesis of cellulose, pectin, and callose within the rice cell wall. It also up-regulates the expression of genes associated with cell wall component synthesis (OsCESA8, OsPME15, and OsGRP0.9) and callose synthesis (OsGSL1, OsGSL10, and OsGSL12). These biochemical modifications strengthen the cel

SUBMITTER: Liu X 

PROVIDER: S-EPMC12494510 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature