Prohexadione calcium boosts pepper stem rigidity: coordinated regulation of hormonal crosstalk and lignin deposition drives xylem reinforcement.

ABSTRACT: Robust seedlings are critical for mechanized transplanting efficiency, with plant growth regulators (PGRs) playing a key role in seedling cultivation within plant factory systems. However, as a new type of PGR, limited research has focused on prohexadione calcium (ProCa), and its effects on pepper (Capsicum annuum L.) seedling development. This study aimed to identify the optimal foliar ProCa concentration and evaluate its stem-strengthening mechanisms in pod pepper seedlings. Results demonstrated that 200 mg/L ProCa significantly enhanced seedling vigor. Key findings included: 1) a 15.31-21.51% reduction in plant height coupled with increased stem diameter and dry matter accumulation; 2) improved root vitality (8.74-9.55%) and seedling index (12.31-29.32%); 3) enhanced stem mechanical pro

SUBMITTER: Xia K 

PROVIDER: S-EPMC12477794 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature