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首页> 外文期刊>Acta Horticulturae >Existence and function of petal colour identity gene in apetalous wild chrysanthemum.
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Existence and function of petal colour identity gene in apetalous wild chrysanthemum.

机译：花瓣状野生菊花花瓣色同一性基因的存在与功能。

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In most chrysanthemums, the capitulum is composed of ray florets and disk florets. The ray floret colour in yellow-flowered cultivars is mainly due to carotenoids. In white-flowered chrysanthemum cultivars (Chrysanthemum morifolium), the ray floret colour is due to the cleavage of carotenoids catalyzed by carotenoid cleavage dioxgenase4 (CmCCD4a). CmCCD4a suppression by RNA interference (RNAi) gives a yellow colour to white ray florets. In wild chrysanthemums, the ray florets are either white or yellow, indicating that ray floret colour probably results from carotenoid cleavage in wild chrysanthemums, as in chrysanthemum cultivars. Southern blot analysis confirmed that wild chrysanthemum species with white ray florets had CmCCD4a orthologs, while those with yellow ray florets did not. This suggests that carotenoid cleavage also contributes to ray floret colour in wild chrysanthemums. CmCCD4a expression is observed to be strictly limited to ray florets. Southern blot analysis showed that Chrysanthemum shiwogiku has CmCCD4a orthologs, although its capitulum has only disk florets and no ray florets. To confirm the function of this CmCCD4a ortholog, C. shiwogiku was interspecifically hybridized with a yellow-flowered cultivar 'Squash' that does not have CmCCD4a. The capitulum of all progenies produced white ray florets. CmCCD4a ortholog fragments were detected in all progenies by polymerase chain reaction. These results showed that the CmCCD4a orthologs present in apetalous C. shiwogiku, and its translated product has an enzymatic function in the ray florets.
机译：在大多数菊花中，花序由射线小花和盘状小花组成。黄花品种的射线小花颜色主要归因于类胡萝卜素。在白花菊花品种（菊花）中，射线小花的颜色是由于类胡萝卜素裂解双氧合酶4（CmCCD4a）催化的类胡萝卜素裂解而引起的。 RNA干扰（RNAi）抑制 CmCCD4a 使白色射线小花呈黄色。在野生菊花中，射线小花为白色或黄色，这表明射线小花的颜色很可能是由野生菊花中的类胡萝卜素裂解引起的，就像菊花品种中那样。 Southern印迹分析证实，具有白色射线小花的野生菊花物种具有 CmCCD4a 直向同源物，而具有黄色射线小花的野生菊花物种没有。这表明类胡萝卜素的裂解也有助于野生菊花的射线小花颜色。观察到 CmCCD4a 表达仅限于射线小花。 Southern印迹分析表明， chrysanthemum shiwogiku 具有 CmCCD4a 直系同源物，尽管其花序只有圆盘小花而没有射线小花。为了确认此 CmCCD4a 直系同源物 C的功能。 shiwogiku 与没有 CmCCD4a 的黄色品种'Squash'种间杂交。所有子代的头状花序产生白色射线小花。通过聚合酶链反应在所有子代中检测到 CmCCD4a 直向同源物片段。这些结果表明， CmCCD4a 直系同源物存在于花瓣状的 C中。 shiwogiku ，其翻译产物在射线小花中具有酶促功能。

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