摘要 以广州市区域内部分苗圃的三角梅（Bougainvillea Comm. ex Juss.）叶色嵌合体为调查对象，观察形态特点；通过筛选不同类型的嵌合植株为试材，以正常叶色植株为对照组，测定并分析其叶绿素SPAD值、光合色素相对含量，研究三角梅属植物叶色嵌合特点及光合色素含量差异．结果表明：广州市区域内常见的三角梅叶色嵌合体共有51种，嵌合体表型可分成3大类：绿心黄边、黄心绿边以及混合型，且不同品种的嵌合体存在颜色差异；嵌合体植株叶片从绿色区域到黄色区域，叶绿素SPAD值不断下降，黄色区域仍有极低含量叶绿素；各光合色素含量均显著降低，而类胡萝卜素/总叶绿素比值则均高于绿色区域，说明嵌合部位呈现黄色与类胡萝卜素/总叶绿素比值升高有一定的相关性．
Abstract：In this paper, the leaf color chimeras of Prunus mume in some nurseries in Guangzhou were investigated to observe the morphological characteristics; Through screening different types of chimeric plants as test materials, and normal leaf color plants as control group, the chlorophyll SPAD value and the relative content of photosynthetic pigments were measured and analyzed, and the characteristics of leaf color chimerism and the difference of photosynthetic pigment content of Prunus mume were studied. The results showed that there were 51 kinds of common leaf color chimeras of Prunus mume in Guangzhou, and the chimeric phenotypes could be divided into three categories: green heart yellow edge, yellow heart green edge and mixed type, The chimeric parts of different varieties have different colors; The SPAD value of chlorophyll in the leaves of chimeric plants decreased from the green part to the yellow part, and there was still very low content of chlorophyll in the yellowing part; The content of each photosynthetic pigment decreased significantly, while the carotenoid/total chlorophyll ratio was higher than that of the green part, indicating that there was a certain correlation between the yellow color of the chimeric part and the increase of the carotenoid/total chlorophyll ratio.
2023, Vol. 36 
