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Start Over Coverage 217-222

2. Leaf chloroplast ultrastructure and photosynthetic properties of a chlorophyll-deficient mutant of rice

Creator:
Wu, Z. M., Zhang, X., Wang, J. L., and Wan, J. M.
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
fotosyntéza, rýže, photosynthesis, rice, chlorophyll fluorescence, violaxanthin, ultrastructure, 2, and 581
Language:
Multiple languages
Description:
Leaf chloroplast ultrastructure and photosynthetic properties of a natural, yellow-green leaf mutant (ygl1) of rice were characterized. Our results showed that chloroplast development was significantly delayed in the mutant leaves compared with the wild-type rice (WT). As leaves matured, more grana stacks formed concurrently with increasing leaf chlorophyll (Chl) content. Except for the lower intercellular CO2 concentration, the ygl1 plants had a higher leaf net photosynthetic rate, stomatal conductance, and transpiration rate than those of the WT plants. Under equal amounts of Chl, the excitation energy of PSI and PSII was much stronger in the mutant than that in the WT. The ygl1 plants showed higher nonphotochemical quenching and lower photochemical quenching. They also exhibited higher actual photochemical efficiency of PSII with a higher electron transport rate. Under the light of 200 μmol(photon) m-2 s-1, the ygl1 mutant showed lesser deepoxidation of violaxanthin in the xanthophyll cycle than WT, but it increased substantially under strong light conditions. In conclusion, the photosynthetic machinery of the ygl1 remained stable during leaf development. The plants were less sensitive to photoinhibition compared with WT due to the active xanthophyll cycle. The ygl1 plants were efficient in both light harvesting and conversion of solar energy., Z. M. Wu, X. Zhang, J. L. Wang, J. M. Wan., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3. On the interaction meteor complex

Creator:
Rajchl, J.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
meteor physics and Interaction Meteor Complex (IMC)
Language:
Czech
Description:
An approach to the problem of a meteoric complex called the Interaction Meteor Complex (IMG) is applied and discussed, where author^s former idea of the interaction layer (Rajchl 1969) is generalized. The role of an extended interaction of meteoroids is ephasized, both with planet surfaces and/or their satellites and with planet atmospheres, elastic or inelastic in form. The dissipation and related formative aspect are joined in one complex and compared with a topological compact. Examples of all the above mentioned types of interaction are presented. In more detail the inelastic interaction with the Earth atmosphere of whole "spectrum" from faint meteors detected by TV technique to Fireball Network bolides, is considered. First results in the form of a ψ structure and cross-complementarity are reported. The possibility of the existence of another "enlarged" ψ structure is anticipated from topological aspects and supported for the outer planets of the Solar Planetary System by results of Levin and Simonenko (1982).
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

4. Supplemental diagnosis and molecular taxonomy of Myxobolus diaphanus (Fantham, Porter et Richardson, 1940) (Myxozoa) parasitizing Fundulus diaphanus (Cyprinodontiformes) in Nova Scotia, Canada

Creator:
Cone, David K. and Easy, Russell H.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Myxozoa, Myxobolus diaphanus, supplemental diagnosis, Fundulus diaphanus, and Nova Scotia
Language:
English
Description:
Myxobolus diaphanus (Fantham, Porter et Richardson, 1940) was found in banded killifish Fundulus diaphanus (Lesueur) at several freshwater localities in Nova Scotia, including the type locality at the mouth of the Salmon River, Guysborough County. The new material, the first to be reported in 64 years, was used to supplement information on spore morphology, to document the site of development in the tissue, and to compare sequence data of the 18S rDNA to other studied myxobolids. Plasmodia with developed spores occurred in loose connective tissue of the head, the dermis (particularly in the roof of the mouth and at the base of fins), surface of the brain and ovary, muscle epimysium, and the submucosa of the intestine. Developed plasmodia containing spores were also found free in the lumen of the vena cava and within fluid-filled spaces of the skull, mandible and lower jaw. A phylogenetic analysis using 18S rDNA (878 bp) placed M. diaphanus in a terminal clade containing certain freshwater species of Henneguya, all of which occur in North America and have elongate spore bodies.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

5. Two new species of Apoloniinae (Acari: Trombiculoidea: Leeuwenhoekiidae) from African small mammals, with a key to the species of the world

Creator:
Brown, Wayne A.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Acari, Africa, Apoloniinae, chiggers, Leeuwenhoekiidae, new species, and Trombiculoidea
Language:
English
Description:
The genus Liuella Wang et Bai, 1992 is transferred from Trombiculidae to Apoloniinae and a new species Liuella monosetosa sp. n. described from specimens taken in Morocco from the hosts Gerbillus sp. and Meriones libycus Lichtenstein. A new species of Straelensia Vercammen-Grandjean et Kolebinova, 1968, Straelensia variocula sp. n. is described from specimens taken in Morocco and Burkina Faso from the hosts Genetta thierryi Matschie, Gerbillus sp., M. libycus and Elephantulus rozeti (Duvernoy). A list of species, hosts and localities and a key to the species of the Apoloniinae of the world are presented.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public