Arabidopsis EGY1 Is Critical for Chloroplast Development in Leaf Epidermal Guard Cells.

ABSTRACT: In Arabidopsis thaliana, the Ethylene-dependent Gravitropism-deficient and Yellow-green 1 (EGY1) gene encodes a thylakoid membrane-localized protease involved in chloroplast development in leaf mesophyll cells. Recently, EGY1 was also found to be crucial for the maintenance of grana in mesophyll chloroplasts. To further explore the function of EGY1 in leaf tissues, we examined the phenotype of chloroplasts in the leaf epidermal guard cells and pavement cells of two ⁴⁰Ar¹⁷⁺ irradiation-derived mutants, Ar50-33-pg1 and egy1-4. Fluorescence microscopy revealed that fully expanded leaves of both egy1 mutants showed severe chlorophyll deficiency in both epidermal cell types. Guard cells in the egy1 mutant exhibited pe

SUBMITTER: Sanjaya A 

PROVIDER: S-EPMC8235790 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature