نتایج جستجو برای: Volvox carteri
تعداد نتایج: 440 فیلتر نتایج به سال:
BACKGROUND The multicellular green alga Volvox carteri represents an attractive model system to study various aspects of multicellularity like cellular differentiation, morphogenesis, epithelial folding and ECM biogenesis. However, functional and molecular analyses of such processes require a wide array of molecular tools for genetic engineering. So far there are only a limited number of molecu...
A preliminary genetic analysis of a number of genetic variants of Volvox carteri f. nagariensis is presented. Techniques are outlined for mutagenesis of Volvox, isolation of mutants and routine genetic analysis. All of the mutants show simple Mendelian segregation patterns and have been tentatively placed in 14 linkage groups.
The multicellular alga Volvox is an attractive model for the study of developmental processes. With the recent report of successful transformation, regulated promoters as well as reporter genes working in this organism are now required. The Volvox genes encoding arylsulfatase and the extracellular glycoprotein ISG are strictly regulated. The former is transcribed only under conditions of sulfur...
What is Volvox? The name comes from the Latin volvere, to roll, and ox, as in atrox, fierce. Volvox is a spherical multicellular green alga, which contains many small biflagellate somatic cells and a few large, non-motile reproductive cells called gonidia, and swims with a characteristic rolling motion. Ever since van Leeuwenhoek first viewed these algal ‘fierce rollers’ with utter fascination ...
Steering their swimming direction toward the light is crucial for the viability of Volvox colonies, the larger members of the volvocine algae. While it is known that this phototactic steering is achieved by a difference in behavior of the flagella on the illuminated and shaded sides, conflicting reports suggest that this asymmetry arises either from a change in beating direction or a change in ...
The multicellular green alga Volvox carteri and its morphologically diverse close relatives (the volvocine algae) are well suited for the investigation of the evolution of multicellularity and development. We sequenced the 138-mega-base pair genome of V. carteri and compared its approximately 14,500 predicted proteins to those of its unicellular relative Chlamydomonas reinhardtii. Despite funda...
This paper represents a brief review on current topics in both asexual and sexual reproduction of Volvox L., a green colonial freshwater alga, which is a valuable model of contemporary developmental biology of plants. In the case of asexual life cycle, the main attention is paid to published data on the mechanisms of differentiation into reproductive and somatic cells of Volvox carteri f. nagar...
Volvox is a multicellular spherical green alga that is closely related to the more widely studied unicellular Chlamydomonas. Volvox is a fascinating creature that serves as a useful model system for investigating the evolution of multicellularity and the regulation of cell differentiation (reviewed in Kirk and Nishii, 2001). An adult Volvox, called a spheroid, consists of several thousand small...
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