2026 選修生物II CH4-4-4 植物對抗環境逆境的因應策略

闡述植物如何因應四種主要的非生物逆境，即高溫、低溫、乾旱和淹水；由於植物無法移動，它們必須演化出多樣的生理與形態策略來生存。面對高溫，植物會利用熱休克蛋白來保護細胞蛋白質，並透過蒸散作用來降溫；低溫時則調整細胞膜的脂肪酸比例並產生天然防凍劑來防止結冰。為了應對乾旱，植物會依賴離層素關閉氣孔節約水分，並積累滲透保護劑以保持細胞膨壓。最後，在淹水缺氧的環境下，水生植物的關鍵策略是通過程序性細胞死亡形成通氣組織，為根部輸送氧氣。聽完後可以自主進行線上測驗，檢視學習成效喔~(需要登入gemini) 測驗網址  https://g.co/gemini/share/c5fe409abf1f Powered by Firstory Hosting

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2026 選修生物II CH4-4-4 植物對抗環境逆境的因應策略

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