Constitutive <i>OsCIN1</i> Expression Reprograms Source-Sink Dynamics and Compromises Agronomic Traits in Rice.

ABSTRACT: Cell wall invertases (CINs) establish sucrose gradients between source and sink tissues, essential for the allocation of photoassimilates. Rice possesses nine CIN genes, among which OsCIN1 and OsCIN2 have been reported as key regulators of sink strength. To test whether increasing CIN activity enhances grain yield, we generated OsCIN1 overexpression lines in rice driven by the CaMV 35S promoter. Subcellular localization analysis of OsCIN1-GFP confirmed its apoplastic localization. OsCIN1 promoter::GUS analyses verified expression in vascular tissues and revealed predominant signals in the ovular vascular and lateral stylar vascular traces during seed development. Although CIN activity was markedly elevated throughout the plant, the resulting phenot

SUBMITTER: Nguyen CD 

PROVIDER: S-EPMC12692661 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature