Significance of Polyamines for Flowering in Spirodela punctata |
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Authors: | de Cantu, Leila Bendeck Kandeler, Riklef |
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Affiliation: | Botanical Institute, Agricultural University Gregor Mendel Str. 33, A-1180 Vienna, Austria |
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Abstract: | Spirodela punctata strain O 5, a quantitative long-day plant,flowers only when ethylene-diamine-di-o-hydroxyphenylaceticacid (EDDHA) or salicylic acid was added to the nutrient medium[Scharfetter et al. (1978) Z. Pflanzenphysiol. 87: 445]. Undersuch conditions, cyclohexylamine and methylglyoxal-bis(guanylhydrazone)(both blockers of polyamine synthesis) inhibited flowering withoutsignificant effects on vegetative growth. Supply of spermidineabolished completely the inhibitor effects, but cannot replacethe EDDHA effect on flowering. 1Dedicated to Prof. O. H. Volk, Wurzburg, on his 85th birthday.2Present address: Facultad de Ciencias Forestales, UniversidadAutónoma de Nuevo León. Ap. Post. 41, 67700 Linares,Nuevo León, México. (Received October 19, 1988; Accepted February 3, 1989) |
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