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- W92063404 abstract "Elongation growth in Zea mays (maize) is dependent on the presence of the gibberellin, GA 1 , which originates biosynthetically via an early-13-hydroxylation pathway. GA 1 is apparently the only biologically active gibberellin, per se, in this pathway. Other gibberellins in the pathway are active through their metabolism to GA 1 . The four gibberellin mutants of maize, d 5 , d 3 , d 2 and d 1 control specific and different steps in the pathway. The d 5 gene blocks an early step, CPP to ent -kaurene, the d 3 and d 2 genes control intermediate oxidation steps and the d 1 gene controls the terminal step, GA 20 to GA 1 . The data presented here show that 3-chloro-substitution of GA 20 resulted in the loss of activity when assayed on the d 5 mutant. At low levels no bioactivity was observed. At high levels (greater than 0.1 μg per plant) the bioactivity was 10% that of GA 1 . The bioassay data for 3-chloro-GA 20 support the position that hydroxylation at carbon-3 is necessary for the bioactivity of GA 20" @default.
- W92063404 created "2016-06-24" @default.
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- W92063404 date "1983-01-01" @default.
- W92063404 modified "2023-09-28" @default.
- W92063404 title "GIBBERELLIN BIOSYNTHESIS IN ZEA MAYS: THE 3-HYDROXYLATION STEP GA20 TO GA1" @default.
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- W92063404 doi "https://doi.org/10.1016/b978-0-08-029223-6.50016-1" @default.
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