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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.
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2023, Vol. 36 
