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Start Over Coverage 167-171

2. C4 plants in the deserts of China: occurrence of C4 photosynthesis and its morphological functional types

Creator:
Wang, R. Z.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
annual plants, Chenopodiaceae, forbs, grasses, and shrubs
Language:
Multiple languages
Description:
C4 photosynthetic pathway and morphological functional types were determined for 104 species in 45 genera and 10 families from the deserts of China. 67 C4 species (64.4 %) were found in Dicotyledoneae (e.g. Chenopodiaceae, Polygonaceae, and Amaranthaceae), the other 37 species were in Monocotyledoneae (e.g. Gramineae, Cyperaceae, and Commelinaceae). 36.5 % of the Chenopodiaceae species (predominantly members of the genera Anabasis, Atriplex, Kochia, Salsola, and Suaeda) identified in the desert regions were found with C4 photosynthesis, which was about 48 % of the total C4 species. Many C4 species (58.7 %) were annuals (e.g. Amaranthus, Atriplex, Digitaria, Eragrostis, Kochia, and Salsola) and experienced long-term droughts, high temperature, and high irradiance. Relatively more shrub C4 species (28 species of 104) were found in Chenopodiaceae (e.g. Anabasis, Camphorosma, Haloxylon, and Salsola) and Polygonaceae (e.g. Calligonum) in the desert regions. Most of shrub C4 species with small leaf area were no more than 1 m in height and distributed in sandy soils. Composition of relatively more annual species, shrubs, and Chenopodiaceae C4 species was the primary characteristic for the C4 species occurrence in deserts, and this was remarkably related with the arid environmental conditions.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3. Myxobolus intrachondrealis sp. n. (Myxosporea: Myxobolidae), a parasite of the gill cartilage of the common carp, Cyprinus carpio

Creator:
Molnár, Kálmán
Format:
print
Type:
model:internalpart and TEXT
Subject:
Myxozoa, Myxobolus, new species, gill cartilage, and histology
Language:
English
Description:
A species not identifiable with any of the about 23 Myxobolus species recorded from the common carp so far, was detected in the gills of one- and two-summer-old specimens of the common carp (Cyprinus carpio L.) cultured in pond farms in Hungary. The strictly tissue-specific plasmodia of the parasite were located, surrounded by hyaline cartilage cells, in the chondrous substance of the terminal parts of the gill arches and in the cartilage structure vcntrally connecting the gill arches. The spores of the parasite described as Myxobolus intrachondrealis sp. n. developed in globular or ellipsoidal plasmodia measuring 300-600 pm. By their elongated ellipsoidal shape and similarly elongated polar capsules the spores were well distinguishable from the hitherto described Myxobolus species parasitic in the common carp and also from the cartilage-parasitic Myxobolus species of other fishes.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

5. The meteor complex of P/Encke

Creator:
Porubčan, V. and Štohl, J.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
observations, Taurid meteor complex, and P/Encke
Language:
Czech
Description:
The Taurid meteor complex associated with P/Encke Is studied on the basis of relevant photographic and radar orblts. Orbltal characteristlcs, radiants and durationa of the postperihelion showers are compared with correspondlng theoretlcal values derived from the observationn of the preperihelion Taurlds, Reality of the proposed assoclatlons of mlnor showers with the Taurld complex and the total duratlon of Its actlvilty are evaluated and discussed. Some of the associated showers the Northern and Southern X Orionids, Northern Piscids and Southern Arietids) are confirmed to be In fact parts of the Taurid shower itself.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public