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Extractable and Diffusible Gibberellins From Light- and Dark-grown Pea Seedlings ¹

MSU/AEC Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48823

Gibberellins were obtained from light- and dark-grown peas by solvent extraction and agar diffusion. Both A₅- and A₁-like gibberellins were obtained by extraction; however, by diffusion only the A₁-like gibberellin was found. There was no significant quantitative difference in the levels of diffusible or extractable gibberellin obtained from light- and dark-grown tall and dwarf peas. Several possible explanations for the discrepancy between diffusible and extractable gibberellin were investigated. Of these, only I was supported by experimental evidence, namely, that GA₅ can be converted to GA₁.

¹ Research carried out under United States Atomic Energy Commission Contract No. AT (11-1) -1338.

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				A. H. Halevy, A. Ashri, and Y. Ben-Tal Peanuts: Gibberellin Antagonists and Genetically Controlled Differences in Growth Habit Science, June 20, 1969; 164(3886): 1397 - 1398. [Abstract] [PDF]