EGTA reduces the inflorescence stem mechanical strength of herbaceous peony by modifying secondary wall biosynthesis.

ABSTRACT: The mechanical strength of inflorescence stems is an important trait in cut flowers. Calcium ions (Ca²⁺) play a pivotal role in maintaining stem strength, but little is known about the underlying molecular mechanisms. In this study, we treated herbaceous peony (Paeonia lactiflora Pall.) with ethyl glycol tetraacetic acid (EGTA), an effective Ca²⁺ chelator, and used morphology indicators, spectroscopic analysis, histochemical staining, electron microscopy, and proteomic techniques to investigate the role of Ca²⁺ in inflorescence stem mechanical strength. The EGTA treatment reduced the mechanical strength of inflorescence stems, triggered the loss of Ca²⁺ from cell walls, and reduced lignin in thickened secondary walls in xylem cells as dete

SUBMITTER: Tang Y 

PROVIDER: S-EPMC6395589 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature