EPISODE · Apr 8, 2026 · 19 MIN
2026 biology talkshow:植物的和平分手-離層的生理機制
from 雷比特生物空中講 · host 雷比特老師
深入探討植物離層（Abscission Zone）的運作生理機制，說明植物如何透過精密計算與器官進行「和平分手」。釐清科學史上的命名誤會，指出乙烯才是啟動落葉與果落的主角，而非早期誤傳的離層素。透過分子生物學視角，解析生長素與乙烯的濃度變化如何觸發酵素分解細胞壁，並在傷口處形成具保護力的木栓層。這種「斷臂求生」的策略，不僅讓植物能在嚴酷環境中保留水分與養分，更是種子散播與繁衍後代的演化智慧。這項生理過程體現植物並非被動凋零，而是具備極高適應性的精密生命調節系統。 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://gemini.google.com/share/c89aa23e18ef Powered by Firstory Hosting
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2026 biology talkshow:植物的和平分手-離層的生理機制
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