Clonal variation of the basic resistance factors (POD, SOD, CAT, MDA, PRO) in Michelia chapensis

Michelia chapensis Dandy, a rare and endangered evergreen woody species of the genus Michelia (Magnoliaceae), is endemic to China, with only scattered natural communities (Zhou et al., 2023). First reported from Lechang City, Guangdong Province in 1929 (Dandy, 1929), it is mainly distributed across southern China, with smaller populations in Vietnam (Sima et al., 2020). Valued for its fragrant flowers, medicinal properties, timber, and strong adaptability to diverse soil and climatic conditions (Ao, 1986; Chen et al., 2005; Wang et al., 2009; Liu et al., 2018; Zhou et al., 2023), M. chapensis also plays an important role in providing ecosystem services in both natural and urban environments (Cao et al., 2011; Chen, 2020).