Stomatal immunity against fungal invasion comprises not only chitin-induced stomatal closure but also chitosan-induced guard cell death

• DOI: 10.1073/pnas.1922319117
• Publication Date: 2020-08-11T00:26:41Z
• Authors: Wenxiu Ye; Shintaro Munemasa; Tomonori Shinya; Wei Wu; Tao Ma; Jiang Lu; Toshinori Kinoshita; Hanae Kaku; Naoto Shibuya; Yoshiyuki Murata
• Keywords: 0301 basic medicine; Chitosan; Cell Death; Arabidopsis Proteins; Arabidopsis; Fungi; Chitin; Biological Sciences; Protein Serine-Threonine Kinases; 03 medical and health sciences; Plant Stomata; Calcium; Protein Kinases; Signal Transduction

Significance Fungal disease is a major threat to agriculture and consequently human nutrition. Many pathogenic fungi penetrate through stomata. This study reveals that chitin oligosaccharide (CTOS) from fungal cell wall induces stomatal closure its receptor CERK1, Ca 2+ , S-type anion channel SLAC1, which would prevent penetration. It also shown conversion of CTOS chitosan (CSOS) possible strategy circumvent immunity. At higher concentration, guard cells perceive CSOS, resulting in death, potentially contributes plant defense halting infection The finding active death represents conceptual advance understanding immunity guide future research on cell–microbe interaction crop protection.