Botanical Gazette, Том 68University of Chicago Press, 1919 Publishes research in all areas of the plant sciences. |
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Botanical Gazette, Том 25 John Merle Coulter,M.S. Coulter,Charles Reid Barnes,Joseph Charles Arthur Полный просмотр - 1898 |
Botanical Gazette, Том 44 John Merle Coulter,M.S. Coulter,Charles Reid Barnes,Joseph Charles Arthur Полный просмотр - 1907 |
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acervulus acid anthers appears basidiocarp bog water Botanical Gazette branches bundles Cantheliophorus carbohydrates cells cent compound meristogenous cortical cultures cylinder described diameter divide dune endosperm evaporation factors female filaments flowers foothills forest formation genus germination gills grassland habitat haustoria hermaphrodites humidity hymenophore hyphae indicated intersexuality Jour later layer leaf Lepidostrobus longitudinal losses material mature meristogenous development mesophytic method minus mountain-front mycelium nitrate nitrification nitrogen observed occur organic pedicel perithecia Pestalozzia phloem phosphorus pileus pistils plains plants plate pollen present primordium protoxylem pycnidia pycnidium rainfall region root systems sand seedlings seeds sexual showing shown in fig simple meristogenous slopes soil solution species sporangia sporangiophore sporangium spores sporophyll stage stamens stem sterile strains strobilus structure surface symphogenous Taxus temperature Tilia tion tracheids transpiration trees tube usually variation vascular vegetation wall xerophytic xylem zoospores zygospores
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Стр. 234 - ... ease in petri-dish cultures. The behavior of the threads in the formation of the pseudoparenchyma is varied and the process is somewhat indefinite. The mycelial branches that enter into the structure may arise from the short cells (Fig. 23 , A), or they may grow in from adjacent hyphas (Fig. 23, E). The interspaces found in the earlier stages are filled by the growing in of these branches and by a budding-like action of the hyphal cells bordering the space (Fig. 23, B). Serial sections show that...
Стр. 492 - They will be a revelation to you, they are so sweet, clean, well put up, and withal so efficient.
Стр. 191 - ... nitrate. Whether this be due to a difference of conditions, a difference in the virility of the organisms, or a specific difference in the bacteria, we are not at present prepared to say. The short time at our disposal has made it impossible to settle this and many other questions to our own satisfaction. We are not even prepared to say that there may not have been a mixture of two or more species in our flasks, all agreeing closely in morphological characters, and in giving no growth on gelatin,...
Стр. 383 - ... 1919. — The numerous depressions of the Sacramento plains have a very fine-graded soil, where water stands during the period of winter rain and even into early spring. The vegetation is very different from that of the usual grassland of the region, being composed of very few species, with practically no introduced weeds. The depressions usually show a central area and a marginal zone, the former characterized by a dense growth of Allocarya or Baeria, and the latter by Floerkea Dougla&ii and...
Стр. 189 - Owing to the lack of the usual means of diagnosis, it is difficult to determine in a short time whether this species is the same as the one described by the Franklands and by Winogradsky. On one important point there appears to be a difference between our results and those reached by the abovementioned investigators. The organism discovered by them oxidizes ammonia to nitrite, but carries it no farther.
Стр. 234 - ... increase their numbers by branching (Fig. 23, A). This stage is observed with ease in petri-dish cultures. The behavior of the threads in the formation of the pseudoparenchyma is varied and the process is somewhat indefinite. The mycelial branches that enter into the structure may arise from the short cells (Fig.
Стр. 462 - Influence, sur le développement de la plante, des substances minérales qui s'accumulent dans ses organes comme résidus d'assimilation. Absorption des matières organiques colloïdales par les racines.
Стр. 234 - ... the process, but this opinion was based on observations of later stages rather than on the earliest steps in the development. The dense pseudoparenchyma of the maturer fruit bodies suggests meristematic divisions, but apparently the structure, for the most part, arises symphyogenetically (Fig. 23). In agar cultures a group of threads may be observed to be directed toward a common point where the pycnidium is to be formed. Here the...
Стр. 123 - Maleness and femaleness are relative; there are all grades of compatibilities. (3) Sex determination, at least in hermaphrodites, is fundamentally a phenomenon of somatic differentiation that is ultimately associated with processes of growth, development, and interaction of tissues, and subject to modification or even complete determination by them.
Стр. 250 - 13 Shear, CL and Stevens, Neil E. Cultural characters of the chestnut blight fungus and its near relatives. US Dep't of Agri. Bureau of Plant Industry Circ. 131:1-18. July 1913. 98. '13 Penna. Chestnut Tree Blight Commission; Report July 1 to Dec. 31 1912. 1-67. 1913. 99. '13 Heald, F D. and Studhalter, RA Preliminary notes on birds as carriers of the chestnut blight fungus. Science. 38:278-280. Aug. 1913. 100. '13...