Botanical Gazette, Volumen40John Merle Coulter, M. S. Coulter, Charles Reid Barnes, Joseph Charles Arthur University of Chicago Press, 1905 Publishes research in all areas of the plant sciences. |
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Página 50
... mother cell stage when the ovules appear . The rounded mother cells do not always divide simultaneously . Division of the two daughter cells is simultaneous or nearly so ( fig . 8 ) , and almost so in all the daughter cells of a ...
... mother cell stage when the ovules appear . The rounded mother cells do not always divide simultaneously . Division of the two daughter cells is simultaneous or nearly so ( fig . 8 ) , and almost so in all the daughter cells of a ...
Página 51
... mother cells dividing length- wise , makes it doubtful whether pressure is much of a factor in deter- mining the ... cell stage . The division is not simultaneous in the same sporangium , nor even in the same tetrad ; the division is complete ...
... mother cells dividing length- wise , makes it doubtful whether pressure is much of a factor in deter- mining the ... cell stage . The division is not simultaneous in the same sporangium , nor even in the same tetrad ; the division is complete ...
Página 53
... mother cell before tetrad division . X3300 . FIG . 8. Microspore daughter cells in simultaneous division . X3300 . FIG . 9. Three pollen grains from a mother cell . X2250 . FIGS . 10-13 . Various arrangement of pollen grains in tetrads ...
... mother cell before tetrad division . X3300 . FIG . 8. Microspore daughter cells in simultaneous division . X3300 . FIG . 9. Three pollen grains from a mother cell . X2250 . FIGS . 10-13 . Various arrangement of pollen grains in tetrads ...
Página 81
... mother cell of Pallavicinia decipiens was announced by FARMER in 1893 , and in 1894 he published his detailed studies upon the same plant . The most remarkable feature of these papers is the significance which the author attributes to a ...
... mother cell of Pallavicinia decipiens was announced by FARMER in 1893 , and in 1894 he published his detailed studies upon the same plant . The most remarkable feature of these papers is the significance which the author attributes to a ...
Página 82
... mother cell , each with a normal bipolar spindle . FARMER ( 8 ) is not willing to exclude the four - rayed figure from the spindle apparatus or to employ the term spindle in the restricted sense of DAVIS ; but the main fea- tures of the ...
... mother cell , each with a normal bipolar spindle . FARMER ( 8 ) is not willing to exclude the four - rayed figure from the spindle apparatus or to employ the term spindle in the restricted sense of DAVIS ; but the main fea- tures of the ...
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acid algae apex appear ascus BOTANICAL GAZETTE branches buds cents CHICAGO PRESS chromatin chromosomes color cotyledons cultures curves dark described dishes division embryo sac endosperm endospore enzyme exospore experiments flora flowers formation gametophyte genus germination glass growing growth hairs holdfasts hyphae Hypocrea alutacea illustrated laboratory Lake Lantern Slides later layer leaf leaves light LITHIA WATER longa longis megaspore mitosis mother cell nitrogen nucleus Oaxaca occur organs oxygen paper peat PIANO plants plates pollen pollen tube postpaid present primordia Professor proteids protoplasm published PUCCINIA removed rhizobia rhizoids roots Salix Sceptridium seedlings seeds shoots shown shrubs societies soil solution species specimens Sphaeria spindle spirem sporangium spore membrane spores stage starch stem substratum surface tamarack temperature tetrad tion tissue transpiration tube Typewriter Ueber University of Chicago vegetation York zone zoospores
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Página 358 - ... at the centre, looking along a radius, and along a side adjacent to it, starting at the centre again, taking the next radius and the next side, say in a right-handed sense of rotation, etc. But this explanation of the phenomenon of seeing the figure as a swastika is of no fundamental interest to us. It is of interest to us only in so far as it helps one to see that the expression "seeing the figure as a swastika...
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