DTA1 — Lactuca sativa

Summary

LsDTA1 (GA2OX4, GA2OX2, GA2OX6) on lettuce chromosome 1 encodes a 2-oxoglutarate-dependent dioxygenase with gibberellin 2-oxidase activity, placing it in the IPNS-like Fe2OG oxygenase family. The gene is associated with gibberellin catabolism and biosynthesis, coumarin and phenylpropanoid anabolism, responses to red/far-red light, fungal stimuli, and light stimulus. It has been 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 somatic embryo production, gibberellin metabolism, and seed germination. Sequence similarity further links the family to traits including plant height, leaf and fruit dimensions, root weight, stem diameter, chlorophyll content, sugar content, germination rate, and stomatal resistance.