Eukaryotic lipid metabolic pathway is essential for functional chloroplasts and CO₂ and light responses in Arabidopsis guard cells.

ABSTRACT: Stomatal guard cells develop unique chloroplasts in land plant species. However, the developmental mechanisms and function of chloroplasts in guard cells remain unclear. In seed plants, chloroplast membrane lipids are synthesized via two pathways: the prokaryotic and eukaryotic pathways. Here we report the central contribution of endoplasmic reticulum (ER)-derived chloroplast lipids, which are synthesized through the eukaryotic lipid metabolic pathway, in the development of functional guard cell chloroplasts. We gained insight into this pathway by isolating and examining an Arabidopsis mutant, gles1 (green less stomata 1), which had achlorophyllous stomatal guard cells and impaired stomatal responses to CO₂ and light. The GLES1 gene encodes a small gl

SUBMITTER: Negi J 

PROVIDER: S-EPMC6130404 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature