Abstract
Eight gibberellins (GAs) were identified and quantified in extracts of seed of the flax, Linum usitatissimum L. cv. Hwanamama, Hwabaekama by GC-MS-SIM and Kovats retention indices. Four of these gibberellins are members of the early-C13-hydroxylation pathway (GA53, GA19, GA20, and GA1), and four are members of the non-C13-hydroxylation pathway (GA12, GA24, GA9, and GA4). Of these eight gibberellins, GA24 was more abundant in yellow-seeded flax (cv. Hwanamama) than in brown-seeded flax (cv. Hwabaekama), whereas GA9 was 8.3-fold more abundant in brown-seeded flax (cv. Hwabaekama) than in yellow-seeded flax (cv. Hwanamama). In both flax cultivars, non-C13-hydroxylation pathway was the main route leading to endogenous accumulation of GA4 in the seed.
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