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菌丝及其延伸过程特点是

问答题

2021-12-25 21:11

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正确答案

（1）直径：为5~10/20/40甚至400微米，比放线菌的菌丝粗约10倍；
（2）长度：可以无限伸长。
（3）生长：都是有菌丝顶端细胞不断伸长而实现的。相当于尖端的1~2个隔断为生长区，后面部分菌丝壁厚不能生长，内含物少，颜色浅，而生长区菌丝内含物多，色深。首先最顶端细胞核复制，然后形成横隔，再伸长。
（4）分枝：能产生很多分枝，对于无隔菌丝也是先复制再伸长。对于第二个隔断的核，复制后形成突起，继续分裂伸长为分枝。
（5）类型：根据菌丝中是否存在隔膜，可把霉菌菌丝分为两类：有隔菌丝和无隔菌丝。

试题解析

标签：农业微生物学农学

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