ATGSL05 (GLUCAN SYNTHASE-LIKE 5); 1,3-beta-glucan synthase/ transferase, transferring glycosyl groups; Encodes a callose synthase that is required for wound and papillary callose formation in response to fungal pathogens Erysiphe and Blumeria. Mutants are resistant to P. parasitica and exhibit an exaggerated PR1 response.Contributes to PAMP-induced basal defense. ; Involved in sporophytic and gametophytic development. Required for normal leaf development. During pollen formation, required for the formation of the callose wall separating the tetraspores of the tetrad (interstitial wall) [...] (1780 aa)