Pollen Tube Growth Promoters from the Style of Rhododendron mucronatum G. Don

概要

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Compounds that promoted the growth of pollen tubes were isolated from the style of Rhododendron mucronatum and were identified as azalein, (+)-catechin, and (-)epicatechin. Among these compounds, 50-100 ppm of (+)-catechin or (-)-epicatechin increased the growth of pollen tubes in Camellia japonica, R. mucronatum, Styrax japonica, and Pinus densflora by 16-20%. These compounds had no significant effects on the growth of pollen tubes in Lilium auratum and Narcissus pseudo-narcissus. Among the phenolic compounds with similar chemical structures as the promoters, catechol- and pyrogallol-type compounds had the activity and the latter types were more effective. As α-tocopherol also showed growth promoting activity, it was thought that the antioxidative activity of the phenolic compounds was responsible for the promotion of the pollen tube growth.
社団法人日本農芸化学会の論文
1993-12-23