SIS7 — Phaseolus vulgaris

Summary

PHAVU_005G051600, designated PvSIS7 on French bean chromosome 5, encodes a carotenoid dioxygenase with 9-cis-epoxycarotenoid dioxygenase activity and metal binding capability. The gene is associated with abscisic acid (ABA) biosynthesis and signaling, as well as carotene breakdown, lycopene, beta-carotene and xanthophyll anabolism. It has been linked to seed dormancy, fruit ripening, anther and pollen development, and responses to osmotic and salinity stress, salicylate, gibberellin and auxin. The product localises to the chloroplast thylakoid membrane and stroma. Associations include photosynthetic rate, proline content, ethylene sensitivity, branching, stomatal closure, disease susceptibility, seed germination, leaf senescence, and tolerance to drought, salt, high light, cold and osmotic stress. Studies of related genes in other species link the family to drought tolerance, ABA accumulation and transpiration rate.