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为什么大葱不怕冻而洋葱就怕冻呢

更新时间: 2020-09-19 00:00:00     

这同大葱特殊细胞生理结构有关系。在显微镜下观察大葱可以发现:低温只是使大葱细胞间的水分结了冰,细胞壁并没有受任何损伤。等到气温变暖化冻以后,大葱便能恢复生机。

如果搬动受冻的大葱,由于受到外力挤压,细胞间隙的硬冰就会破碎,从而破坏细胞壁。如果周围温度上升,细胞液便会从破裂的细胞壁中流出来,使葱体变得粘粘糊糊而腐烂。

关键词: 为什么 大葱 不怕 洋葱

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