作物学报 ›› 2026, Vol. 52 ›› Issue (6): 1876-1890.doi: 10.3724/SP.J.1006.2026.54127
陈国欢(
), 张锐, 李艳迪, 赵佳琪, 任湧涛, 张天赐, 郭华春, 李俊*(
), 杨芳*(
)
Chen Guo-Huan(
), Zhang Rui, Li Yan-Di, Zhao Jia-Qi, Ren Yong-Tao, Zhang Tian-Ci, Guo Hua-Chun, Li Jun*(
), Yang Fang*(
)
摘要:
为了探究叶面喷硒对浅紫色马铃薯绿原酸、总酚、类黄酮和花青素含量及花青素合成途径相关基因的影响, 明确适合马铃薯块茎花青素合成的外部硒浓度和喷施次数, 本研究以紫皮浅紫肉的“滇彩薯104”为材料, 利用亚硒酸钠进行叶面喷硒, 设置硒浓度水平为0 (喷蒸馏水, CK)、5 (Se1)和10 mg L-1 (Se2), 2个喷施次数(2次和3次), 其中, 2次喷施分别于马铃薯块茎形成期和块茎膨大期喷施, 3次喷施分别在马铃薯块茎形成期、块茎膨大期和块茎成熟期喷施, 共5个处理, 对其绿原酸、总酚、类黄酮和花青素含量及花青素合成途径相关基因的表达进行分析。结果表明, 喷施2次Se1对于马铃薯花青素合成促进效果更好, 2次叶面喷施Se1使马铃薯薯皮中StF3'5'H、StCHS、StDFR、StANS和StMYB113等基因的表达水平显著上调9.11~10.11倍, 使马铃薯薯肉中StCHS、StDFR等基因的表达水平显著上调2.99~3.72倍; 3次叶面喷施Se2对于促进马铃薯块茎中绿原酸和总酚含量效果更好, 使其含量较CK显著上升30.12%和40.80%。同时, 硒处理能够显著增强花青素合成途径中多个结构基因与转录因子之间的表达相关性, 促进其协同调控网络的形成, 从而共同推动花青素的积累。
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