. Bulletin. 1901-13. Agriculture; Agriculture. 16 A SOU' ROT OF THE CALLA LILY. Ill a 1^4 lioiu-oKl IxH't-lnotli cultiuv they iiieasure ulxmt ().r>// in width. In the same ciiltiin' the h'u^th vaiitvs from :j// to ?>ju. Tlie very short ones, as sliown l)y the nieasiirenients, are round, oi* nearl}' so; these eventually elongate, heconunj^ rods. After the orj^anisnis have elon- gated, cross wails are formed and as a rule they soon break in two, forming- separate oi^anisms; hut occa- sionally they remain intact until a lono- chain is fornx'd, J which may tinally hreak up into individual ce
. Bulletin. 1901-13. Agriculture; Agriculture. 16 A SOU' ROT OF THE CALLA LILY. Ill a 1^4 lioiu-oKl IxH't-lnotli cultiuv they iiieasure ulxmt ().r>// in width. In the same ciiltiin' the h'u^th vaiitvs from :j// to ?>ju. Tlie very short ones, as sliown l)y the nieasiirenients, are round, oi* nearl}' so; these eventually elongate, heconunj^ rods. After the orj^anisnis have elon- gated, cross wails are formed and as a rule they soon break in two, forming- separate oi^anisms; hut occa- sionally they remain intact until a lono- chain is fornx'd, J which may tinally hreak up into individual cells (PI. II, tig. I). This orj»*anism moves with a gliding motion, Fig. o. — Bari!iu.^ ^nj upon staining for tlagella it is found to possess aroidtif with thi- x • i i. ai ii *.*. i geiiaxabout(500. iroui two to eight wavv tlagella scattered over the sur- face of the body (PI. II. tig. 1). The tlagella vary in length from 4/< to IS//, i. e., two to six times the average length of the bodv. No spores belonging to this organism have been found in any of the artificial cultures or in the diseased plants. PHYSIOLOGICAL CHARACTERS OF THE ORGANISM. Certain physiological characters of the organism have been deter- mined by growing it on ditferent media and under various conditions of light, heat, etc., as described in the following pages. NUTRIENT MEDIA. In studying the ph^^siology of this organism the following media have been used, viz, beef broth, agar, gelatin, Uschinsky's solution, Dunham's peptone solution, peptone water with rosolic acid, peptone water with methylene blue, simple peptone water,'' milk, litmus milk, indigo-carmine peptone, and o^g aU)umen. All these culture media were carefully prepared. The beef-broth stock was made froin lean beef, the chemicals were ''c. p.," and only distilled water was used. In addition to these media the following vegetables and fruits were used, viz, potatoes, onions, turnips, celery, cucumbers, peppers (green fruits), pi
Size: 1782px × 1403px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookpublisherwashingtongovtprintoff, booksubjectagriculture
