Growth-promoting activity of some selectively modified gibberellins |
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Authors: | Edward P. Serebryakov Vera N. Agnistikova Ludmila M. Suslova |
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Affiliation: | N.D. Zelinsky Institute of Organic Chemistry, U.S.S.R. Academy of Sciences, 117913 Moscow, U.S.S.R. |
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Abstract: | Synthetic gibberellin analogues derived mainly from GA3 were tested for their growth-promoting activity in three standard bioassay systems (dwarf pea, cucumber and lettuce). The highest potency in all the tests was displayed by 13-O-methyl-GA3, while in the case of 7-homo-GA3 a large decrease in activity was observed. No obvious correlation could be found between the partitioning of acidic analogues between ethyl acetate and water and their biological potencies. The results of the bioassays appear to be compatible with the assumption that it is the spatial correspondence between an active gibberellin (such as GA3 or GA7) and a specific receptor that plays the prime role in the growth response. |
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Keywords: | Leguminosae dwarf pea Cucurbitaceae cucumber Compositae lettuce bioassays gibberellin analogues potency scale hormone-receptor interactions. |
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