. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 388 GENERAL PLANT PATHOLOGY within the tumor cells as the result of the meUbolism of the im- prisoned bacteria (Psetidomonas tumefaciens). Growth of the tumor comes about not by the direct application of stimuli, but indirectly by the removal of various inhibitions. Under normal conditions the physiologic brakes are on at all times, more or less, in both plants and animals, and only when they are entirely or largely removed in. ^l^*"M^^^i2 Fig. 155.—Cross-section of one lobe of tub
. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 388 GENERAL PLANT PATHOLOGY within the tumor cells as the result of the meUbolism of the im- prisoned bacteria (Psetidomonas tumefaciens). Growth of the tumor comes about not by the direct application of stimuli, but indirectly by the removal of various inhibitions. Under normal conditions the physiologic brakes are on at all times, more or less, in both plants and animals, and only when they are entirely or largely removed in. ^l^*"M^^^i2 Fig. 155.—Cross-section of one lobe of tubercle of Lupinus anguslifolius, con- taining bacteria, X circa 60. (After Moore, Geo. T., Yearbook U. S. Dept. Agric, pi. xxxviii, 1902.) particular areas do we observe an unlimited cell proliferation result- ing in the hasty and peculiar growths known as neoplasms, or cancers (Figs. 158, 159). Various weak (dilute) poisons are known to cause cell proliferations in plants—that is, copper salts, ammonia, salts of lithium, and the excretions of the larvae of gall flies, of certain nema- todes and of various fungi.' The true fungi (EUMYCETES), including all the important groups, 'Smith, Erwin F.: Mechanism of Tumor Growth in Crown gall. Journ. Agric. Res. viii: 165-186, Jan. 29, 1917, with 65 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 Harshberger, John W. (John William), 1869-1929. Philadelphia : P. Blakiston's Son & Co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1917
