. A textbook of botany for colleges and universities ... Botany. SAPROPHYTISM AND SYMBIOSIS 781 tural modification of a tissue or of an organ due to another organism.' Commonly the affected tissue is much enlarged, either through hyper-. FiG. 1089. — A cross section through the edge of a leaf gall of Viburnum Laniana, showing striking hyperplasy and hypertrophy; p, the palisade cells of the uninfected portion; p', the corresponding cells of the infected portion; /, the sponge cells of the uninfected portion; /', the corresponding cells of the infected portion; e, epidermis; li, epidermal hair;
. A textbook of botany for colleges and universities ... Botany. SAPROPHYTISM AND SYMBIOSIS 781 tural modification of a tissue or of an organ due to another organism.' Commonly the affected tissue is much enlarged, either through hyper-. FiG. 1089. — A cross section through the edge of a leaf gall of Viburnum Laniana, showing striking hyperplasy and hypertrophy; p, the palisade cells of the uninfected portion; p', the corresponding cells of the infected portion; /, the sponge cells of the uninfected portion; /', the corresponding cells of the infected portion; e, epidermis; li, epidermal hair; considerably magnified. — From Kuster. trophy (cell enlargement) or hyperplasy (development of new cells), or through both combined (fig. 1089). Scarcely less common is the ^ Galls also are termed cecidia and have been contrasted with domatta, which differ in that the organisms inhabiting them are thought to be harmless or even beneficial rather than detrimental to their hosts. An example of domatia is afforded by the root tubercles of clover; sometimes the structures inhabited by plant lice are regarded as domatia, since the nitrogenous animal excreta are thought to benefit the plant. It seems wiser to call all such structures galls, regardless of their benefit or harm to the host 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 Coulter, John Merle, 1851-1928; Barnes, Charles Reid, 1858-1910, joint author; Cowles, Henry Chandler, 1869- joint author. New York, Cincinnati [etc] American book company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1910
