DTA1 — Lactuca sativa

Summary

LsDTA1 (GA2OX4, GA2OX2, GA2OX6) on chromosome 9 of garden lettuce encodes a 2-oxoglutarate-dependent dioxygenase with gibberellin 2-oxidase, 3-beta-dioxygenase, and 20-oxidase activities, placing it in the IPNS-like Fe2OG oxygenase family. The gene is associated with gibberellin catabolism and biosynthesis, responses to red/far-red light and light stimuli, defense responses including to oomycetes, flavonoid anabolism, and growth regulation. It localizes to the cytoplasm and is linked to ethylene sensitivity, photosynthetic rate, hypocotyl elongation, seed dormancy, axillary bud formation, lateral branching, and parthenocarpic fruit development. Studies of related genes in other species connect the family to traits such as plant height, leaf and fruit dimensions, root weight, seed longevity, germination rate, chlorophyll content, and stomatal resistance.