鳞茎膨大期大蒜叶鞘内水杨酸含量明显高于鳞茎未膨大期 ;在膨大过程中 ,内源SA含量的升降略早于鳞茎生长速率的变化 ;茉莉酸甲酯和低温 ( 4℃ )预处理在促进鳞茎膨大的同时均能增加叶鞘内SA含量 ;经 50d低温预处理的大蒜 ,于鳞茎开始膨大时叶片喷施SA 1mmol/L可明显促进鳞茎膨大 ,表明SA在大蒜鳞茎自然膨大中有重要作用。 The content of salicylic acid in the bulb sheath of bulblets was significantly higher than that of bulbs without bulging. In the process of bulking, the content of SA was slightly earlier than bulblets. Methyl jasmonate and low temperature (4 ℃) pretreatment The content of SA in the leaf sheath was increased at the same time when bulblets were promoted, and SA 1 mmol / L in the leaves at the beginning of bulb bulking could promote bulblets significantly after 50 days of low temperature pretreatment of garlic, indicating that SA is important in the natural enlargement of garlic bulbs effect.