Textbook of Theoretical Botany, Volume 2 |
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Page 1436
... pollen or stigma or both , to a mere slowing down of the rate of growth of the pollen tubes . These incompatibility ... tube grains . The same thing is found in the Apple " Landsberger Renette " , but not in all trees . Crossings of this ...
... pollen or stigma or both , to a mere slowing down of the rate of growth of the pollen tubes . These incompatibility ... tube grains . The same thing is found in the Apple " Landsberger Renette " , but not in all trees . Crossings of this ...
Page 1437
... tube takes up nutriment from the cells it contacts during growth in the style . The rate of growth in pollen tubes is very variable . Rates varying from less than 1 mm . to 5 or 6 mm . per hour are recorded but these measurements were ...
... tube takes up nutriment from the cells it contacts during growth in the style . The rate of growth in pollen tubes is very variable . Rates varying from less than 1 mm . to 5 or 6 mm . per hour are recorded but these measurements were ...
Page 1441
Robert Colquhoun McLean, Walter Robert Ivimey-Cook. Pollen tubes do not always , however , enter by the micropyle ... tube enters through the funicle and the chalaza ; acrogamy , when the pollen tube grows to the micropylar end of the sac ...
Robert Colquhoun McLean, Walter Robert Ivimey-Cook. Pollen tubes do not always , however , enter by the micropyle ... tube enters through the funicle and the chalaza ; acrogamy , when the pollen tube grows to the micropylar end of the sac ...
Contents
FLOWERS | 1071 |
POLLINATION AN INTRODUCTION | 1252 |
SEEDS FRUITS AND SEEDLINGS | 1481 |
2 other sections not shown
Common terms and phrases
actinomorphic anatropous androecium Angiosperms anthers antipodal apex axile axis basal base bracts calyx capsule carpels cells colour common contains corolla corolla tube cotyledons cross-pollination cultivated dehisce Dicotyledons dispersal distributed elongated embryo sac enclosed endosperm example female flowers fertilization filaments fleshy floral florets Flowering shoot flowers Fig fruit funicle gardens genera genus germination gynoecium hairs herbs hermaphrodite hypocotyl important inflorescence inner insect integument involucre later layer leaf leaves lobes loculus male flowers margins mature micropyle Monocotyledons nectar Nectar is secreted normal nucellus nuclei occur oosphere outer ovary ovules parietal perianth perianth segments petaloid petals placenta plants pollen grains pollen tube pollination mechanism produced rarely receptacle rhizome seeds self-pollination sepals separate showing shrubs single sometimes species stage stamens stem sterile stigma structure style sub-family surface testa tissue trees tropical unisexual usually vegetative visited wall whorl zygomorphic