. Bulletin. Natural history; Natural history. 16. Fig. 13.—Conidia of H. No. 1: a. showing septa from two depths of focus; b, two germinat- ing conidia witli germ-tubes anastomosing. always, shrinkage of the protoplasts such as is shown in Fig. 11, this shrink- age being usually most pronounced in the end of the conidium showing most vigorous growth. To all appearance the endosporium serves as a stored food and is consumed in germination, since its presence in much diminished quantity in germinated conidia is evident when such conidia are crushed. 1 he conidiophore-cells also occasionally func
. Bulletin. Natural history; Natural history. 16. Fig. 13.—Conidia of H. No. 1: a. showing septa from two depths of focus; b, two germinat- ing conidia witli germ-tubes anastomosing. always, shrinkage of the protoplasts such as is shown in Fig. 11, this shrink- age being usually most pronounced in the end of the conidium showing most vigorous growth. To all appearance the endosporium serves as a stored food and is consumed in germination, since its presence in much diminished quantity in germinated conidia is evident when such conidia are crushed. 1 he conidiophore-cells also occasionally function as conidia by sending out a germ-tube. Here, too, the inner cell-wall seems to serve as reserve food. Longefity of conidia.—It is not known how long conidia live, but on wheat straw that had remained air-dry for fourteen months they germi- nated normally. Noack (87) mentions germination "after many ; Ravn (91) says of three species that at eight months they germinated but sparingly or not at all. Frequency of conidial septa.—H. No. 1 under standard conditions (see appendix, page 180) gave the graph in Fig. J, while similar data for H. No?. 1.^-16 are gi\en in Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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