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梅花‘南京红须’、‘南京红’的花色主要存在着花发育阶段导致的时间变化,反映其花色受花发育控制。二者的花色都在蕾期最浓艳,在初花期略淡,在盛花期又稍浓,在末花期最淡,尽管花瓣在花开放时便开始衰老;在整个花发育时期,同一朵花不同层次花瓣的颜色浓淡均为:外层花瓣>中层花瓣>内层花瓣,即花瓣在花冠中的具体排列位置决定着该片花瓣的特定颜色深浅;但不同层次花瓣颜色的变化趋势不完全一致。同时,两个品种外层花瓣的总黄酮含量变化与外层花瓣的色度变化成正相关。而花朵在树冠的着生部位导致的花色差异极不显著,表明‘南京红须’、‘南京红’的花色的空间变化极微。本文可为梅花红色花色的机理探索和花色色素生物合成关键酶基因cDNA克隆中的花朵选择提供参考。
Plum ’Nanjing red must’, ’Nanjing red’ flower color mainly exists in the flower development stage of the time changes, reflecting the flower color by flower development control. Both the flower color are the most intense bud in the bud stage, a little light in the first flowering stage, slightly thick in the full flowering stage, the lightest in the late flowering stage, although the petals begin to age when the flower is open; during the entire flower development, The color shades of petals at different levels are: outer petals> middle petals> inner petals, that is, the specific arrangement of the petals in the corolla determines the specific color depth of the petals; however, the variation trend of petal colors at different levels is not completely consistent . At the same time, the change of the total flavonoid content of the outer petals of the two cultivars was positively correlated with the color change of the outer petals. The flower color differences caused by the parts of the crown of the crown were extremely insignificant, indicating that the spatial variations of the colors of ’Nanjing Hongsha’ and ’Nanjinghong’ were minimal. This article can provide a reference for the mechanism of plum red flower color selection and flower selection in the cDNA cloning of the key enzyme genes of pigment biosynthesis.