germ tube

British

noun

botany a tube produced by a germinating spore, such as the pollen tube produced by a pollen grain

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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germ tube

The germ tube is rather smaller at its base than further on.

From Fungi: Their Nature and Uses by M. C. (Mordecai Cubitt) Cooke

The oospore on germination usually gives origin to a zoosporangium, but may form directly a germ tube which infects the host.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" by Various

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