2025 biology talkshow :植物雙防禦-水楊酸與茉莉酸的智慧平衡

深入闡述植物應對威脅的兩大核心防禦策略，主要由水楊酸 (SA) 和茉莉酸 (JA) 兩種激素所調控。水楊酸負責啟動「系統性後天抵抗性 (SAR)」，這是一種針對生物營養型病原體（如病毒、細菌）的廣效性全身性防禦反應，其機制包含訊息傳遞與遠端預警。相對地，茉莉酸則主導對抗物理性傷害（如昆蟲啃食）和壞死營養型病原體的防禦，策略包括產生消化抑制劑或吸引天敵。這兩種路徑之間存在拮抗作用，植物會根據威脅類型權衡啟動其中一條路徑，以有效分配有限的資源，展現其複雜而智慧的生存策略。聽完後可以自己進行線上測驗，檢視學習成效喔~(需要登入gemini) 測驗網址  https://g.co/gemini/share/3a206e823c40 Powered by Firstory Hosting

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2025 biology talkshow :植物雙防禦-水楊酸與茉莉酸的智慧平衡

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