inviable after spore germination, without cell division inviable after spore germination, before germ tube formation 2017-09-12T13:44:02Z FYPO:0006211 inviable following spore germination, before germ tube formation Spores with this phenotype can be identified by loss of spore refractility that can be observed by light microscopy or by a decrease in optical absorbance of the spore suspension. lethal after spore germination, before germ tube formation midori A phenotype in which a spore germinates but dies before forming a germ tube or dividing. Such spores exit dormancy and undergo isotropic swelling but the spore wall does not rupture and no germ tube emerges. inviable germinated spore, without germ tube formation