因為單子葉植物種子胚乳外側具糊粉層構造，糊粉層富含糊粉粒且主要成分為蛋白質，當種子吸水後胚分泌的吉貝素會刺激糊粉層分泌水解酶，進而分解胚乳中的養分，故促進種子萌發。
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因為單子葉植物種子胚乳外側具糊粉層構造，糊粉層富含糊粉粒且主要成分為蛋白質，當種子吸水後胚分泌的吉貝素會刺激糊粉層分泌水解酶，進而分解胚乳中的養分，故促進種子萌發。
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但糊粉層不是單子葉獨有啊