Variation of chlorophyll and carotenoids in different varieties and organs of Chinese kale

Chenlu Zhang, Sha Liang, Yilin Wang, Sha Luo, Weijia Yao, H. He, Yuxiao Tian, Huanxiu Li, Fen Zhang, Bo Sun
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Abstract

The concentrations of chlorophyll and carotenoids were analyzed in two organs (leaves and bolting stems) of 19 varieties of Chinese kale (including four maturity periods and two flower colors). Two chlorophylls and four carotenoids were identified in Chinese kale. The concentrations of chlorophyll and carotenoids varied widely in different organs and varieties. JL-03 was a good candidate for the future breeding programs, since it contained the highest concentrations of chlorophyll and carotenoids (except violaxanthin) in leaves. Lutein was the main component of carotenoids and accounted for approximately 50% of total carotenoids. The concentrations of chlorophyll and carotenoids in leaves significantly exceeded those in bolting stems. Principal component analysis showed that organ was the main source of differences of chlorophyll and carotenoid concentrations in different varieties of Chinese kale, while the maturity and flower color have little effect. Correlation analysis identified a significantly positive correlation between chlorophyll and carotenoids in Chinese kale. These results provided evidence for improving human dietary nutrition and breeding of Chinese kale.
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芥蓝不同品种和器官叶绿素和类胡萝卜素的变化
对19个羽衣甘蓝品种(4个成熟期和2种花色)叶片和抽苔茎两个器官的叶绿素和类胡萝卜素含量进行了分析。从芥蓝中鉴定出2种叶绿素和4种类胡萝卜素。叶绿素和类胡萝卜素的浓度在不同器官和品种中差异很大。JL-03叶片中叶绿素和类胡萝卜素(紫黄质除外)含量最高,是未来育种计划的良好候选品种。叶黄素是类胡萝卜素的主要成分,约占总类胡萝卜素的50%。叶片中叶绿素和类胡萝卜素含量显著高于抽苔茎。主成分分析表明,器官是不同品种羽衣甘蓝叶绿素和类胡萝卜素含量差异的主要来源,而成熟度和花色影响较小。相关分析表明,芥蓝叶绿素含量与类胡萝卜素含量呈显著正相关。这些结果为改善人类膳食营养和芥蓝育种提供了依据。
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