PG2 — Brassica juncea

Summary

BJUA07G19820S (PG2, BjADPG1) on Indian mustard chromosome A07 encodes a polygalacturonase enzyme belonging to the glycosyl hydrolase 28 family, characterised by a pectin lyase fold and PbH1 domain. The gene is associated with multiple developmental dehiscence processes, including anther, fruit and silique dehiscence, as well as cell wall modification involved in abscission, fruit ripening, pectin breakdown, cell wall organisation, auxin anabolism, ABA signalling and carbohydrate metabolism. Its product localises to the amyloplast, apoplast and extracellular space. The gene has been connected to defense response and cell wall remodelling. Studies of the Arabidopsis relative ADPG1 link the family to silique dehiscence and seed dispersal, and sequence similarity evidence connects the family to silique fruit morphology and lignin content traits.