16 diploid and polyploid cultivars of loquat were used for studying the relationship between the number of chloroplast in stomata guard cell and the ploidy.

• 以16个枇杷品种的二倍体和自然多倍体为试材，研究气孔保巨细胞叶绿体数目和气孔密度与倍性的相关性。