甜瓜SMXZ基因家族的全基因组鉴定及表达

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中图分类号：S652.01 文献标志码：A 文章编号：1004-390X（2025）03-0126-14

Abstract： [Purpose] To identify and analyze the suppressor of more axillary growth 2-like （SMXL） gene family in melon （Cucumis melo）， providing a basis for further study of the biological functions of SMXL genes in melon. [Methods] The melon SMXL gene family was identified by bioinformatics methods， and the physicochemical properties， structure and function， collinearity， protein structure， promoter cis-acting elements and expresson patterns of the family members were analyzed. [Results] A total of15 CmSMXL genes in melon were identified， classifying into five subfamilies （I-V）， with subfamily V being the largest and most species-specific. The upstream promoter region of CmSMXLs contained abundant cis-elements related to light signaling，hormones，and drought response， etc.Most SMXL proteins were predicted to localize in chloroplasts，and CmSMXL7， CmSMXL14， and CmSMXL15 showing high expression in leaves， suggesting photosynthetic roles. Under abiotic stresses （cold， salt， hormones）， the expresson levels of CmSMXL1， CmSMXL3， CmSMXL6， CmSMXL8，and CmSMXL10 exhibited significant changes. CmSMXL10 and CmSMXL12 responded to powdery mildew infection， while CmSMXL3 and CmSMXL6 expression correlated with Fusarium wilt resistance. [Conclusion] SMXL genes involved in stress responses are identified in melon.

Keywords： Cucumis melo; SMXL gene family; genome-wide identification; stress responses

在植物的生命活动中，激素起着至关重要的调节作用。（剩余22575字）