青霉和曲霉在中国地理分布上有什么特点?

2025-03-16 18:26:22
推荐回答(3个)
回答1:

青霉和曲霉都为曲霉科(Eurotiaceae)常见属,二者的主要鉴别特征是孢子梗的排列不同, 分生孢子顶端的膨大与否。

曲霉的孢子梗是辐射状排列,呈头状.分生孢子梗顶端膨大成为顶囊,一般呈球形。项囊表面长满一层或两层辐射状小梗(初生小梗与次生小梗)。最上层小梗瓶状,顶端着生成串的球形分生孢子.

青霉分生孢子成帚状。从菌丝体伸向空中,各顶端的小梗产生链状的青绿—褐色的分生孢子。分生孢子顶端无膨大。
青霉菌,属真菌不仅可以生产青霉素,还可以生产灰黄霉素,当然有些也会引起桔子、苹果变质。青霉菌产生的无性孢子,分生孢子没有顶囊,分生孢子长在分生孢子梗上,这个梗特别复杂,有分生孢子梗,次级小梗、初级小梗,所以它的梗呈现出毛笔状或者扫帚状,有人把它称为帚状菌。青霉菌的菌丝是有横隔的,这点与曲霉菌一样,但青霉菌和曲霉菌一样也很少进行有性繁殖,或者我们对它的有性阶段不了解,所以它也是属于半知菌亚门的。
曲霉菌,属于曲霉属。曲霉中的黄曲霉,它产生的黄曲霉毒素毒性很强,会引发肺癌,造成很多人死亡。曲霉中的黑曲霉可以用来制造柠檬酸、葡萄糖酸,另外一些曲霉可以用以酿酒、制醋,所以说,曲霉菌我们平时其实碰到还是比较多的。曲霉菌的菌丝是有隔菌丝,它的无性孢子是分生孢子,它的分生孢子很有特点,分生孢子梗末端膨大呈囊状称为顶囊,在顶囊上生出的放射状的瓶状结构,这叫做分生孢子小梗,小梗顶部就长了成串成串的小分生孢子,曲霉的分生孢子有绿、黄、棕、黑、白等到各种颜色,它们的颜色可以作为重要的鉴别意义。曲霉菌它们的有性阶段还不是很清楚,所以它应该划到半知菌亚门。

回答2:

青霉、曲霉跟地理分布什么事……听不懂。

回答3:

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