Effect of Ultraviolet Rays on the Flower Color of <i>Primula malacoides</i>

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  • プリムラ•マラコイデスの花色に及ぼす紫外線の影響
  • プリムラ・マラコイデスの花色に及ぼす紫外線の影響-1-紫外域除去資材下における花色の変化
  • プリムラ マラコイデス ノ カショク ニ オヨボス シガイセン ノ エイキョウ
  • Effect of Ultraviolet Rays on the Flower Color of Primula malacoides
  • I. Discoloration of Flower Color under a Covering of Plastic Film Absorbing Ultraviolet Rays
  • (第1報)紫外域除去資材下における花色の変化

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Abstract

As mentioned in the previous paper of the authors, the flower color of Primula malacoides cv. ‘Hiotome’ iscolored when it was grown under a plastic film absorbingultraviolet rays below 360nm.<br>The present experiment was carried out to investigate the effect of ultraviolet rays on coloration and anthocyanin content of the flowers, using several cultivars of P. malacoides. The extract of petals with methanol containing 1.0% HCl had a maximum optical density of 540nm. The optical density at 540nm of the extracts of all the cultivars grown under light lacking wave-lengths below 300nm were higher than those grown under light lacking wave-lengths below 360nm. The group with red-scarlet flowers, which includes cultivars ‘Momokomachi’, ‘Hiotome’ and ‘Frilled Queen’, showed great discoloration, while the other group with blue-violet flowers, which includes cultivars ‘New Emtral Pearl’, ‘Brilliancy Improved’ and ‘Uguisu’, showed little response.<br>Three kinds of anthocyanidins, delphinidin, petunidin and malvidin were detected in petals of the cultivars ‘Hiotome’ and ‘kurenai’. Only petunidin and Malvidin were found in the other cultivars.

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