HAESA, an Arabidopsis leucine-rich repeat receptor kinase, controls floral organ abscission.

ABSTRACT: Abcission, the natural shedding of leaves, flowers and fruits, is a fundamental component of plant development. Abscission is a highly regulated process that occurs at distinct zones of cells that undergo enlargement and subsequent separation. Although some components of abscission, including accumulation of the hormone ethylene and cell wall-degrading enzymes, have been described, the regulatory pathways remain largely unknown. In this paper we describe a critical component required for floral organ abscission in Arabidopsis thaliana, the receptor-like protein kinase HAESA. Histochemical analysis of transgenic plants harboring a HAESA promoter:: beta-glucuronidase reporter gene and in situ RNA hybridization experiments show HAESA expression in the abscission zones where the sepals, petals

SUBMITTER: Jinn TL 

PROVIDER: S-EPMC316334 | biostudies-literature | 2000 Jan

REPOSITORIES: biostudies-literature