HEL — Cucumis sativus

Summary

CsHEL (CSA_2G010390) on cucumber chromosome 2 encodes a protein of the PR4 family, containing a Barwin domain and annotated with RNA nuclease, chitin-binding, sugar-binding, hydrolase, and transmembrane receptor serine/threonine kinase activities. The gene is associated with responses to herbivores, viruses, and ethylene, as well as systemic acquired resistance, hypersensitive response-programmed cell death, reactive oxygen species metabolism, and lipid storage. It is linked to leaf vein morphology, leaf number, chlorophyll content, plant height, and fruit development. Associations include pathogen defense, resistance to Botrytis cinerea, salt tolerance, and premature senescence with leaf cell death. The protein localizes to secretory vesicles, the extracellular region, and the plasma membrane. Related genes in other species connect the family to disease resistance, including tobacco mosaic virus resistance, and to seed germination under salt stress.