nitrogen use efficiency and life cycle of root nodules in alfalfa after different mineral fertilization and soil cultivation practices were studied. field trial was conducted in the institute of forage crops, pleven, bulgaria on leached chernozem subsoil type and no irrigation. the next treatments were tested: i) for fertilization as follows: n0p0k0 (control); n60p100k80 (an accepted technology...

During the mating reaction (fertilization) in the biflagellated alga, Chlamydomonas reinhardtii, mt+ and mt- gametes adhere to each other via their flagella and subsequently fuse to form quadriflagellated zygotes. In the studies reported here, we describe a monoclonal antibody directed against an mt+ flagellar surface molecule. The antibody blocks the adhesiveness of mt+ gametes, isolated mt+ f...

Many metazoans convert the reproductive modes presumably depending upon the environmental conditions and/or the phase of life cycle, but the mechanisms underlying the switching from asexual to sexual reproduction, and vice versa, remain unknown. We established an experimental system, using an integrative biology approach, to analyze the mechanism in the planarian, Dugesia ryukyuensis (Kobayashi...

To ensure genome stability, sexually reproducing organisms require that mating brings together exactly 2 haploid gametes and meiosis occurs only in diploid zygotes. In the fission yeast Schizosaccharomyces pombe , fertilization triggers Mei3-Pat1-Mei2 signaling cascade, which represses subsequent initiates meiosis. Here, we establish a degron system to specifically degrade proteins postfusion d...

As the twenty-first century begins, changing technology is testing old rules of property law. In this Article, the author discusses the effect of modern technology on the Role Against Perpetuities. This discussion includes the arguments for and against recognition of the embryo as a life in being, as well as suggestions for legislative solutions to this issue.

E. Seli and A. Agarwal (eds.), Fertility Preservation: Emerging Technologies and Clinical Applications, DOI 10.1007/978-1-4419-1783-6_2, © Springer Science+Business Media, LLC 2012 Abstract Cancer survivors may wish to become parents, if they have lost their reproductive function, by using previously stored gametes or gonadal tissue. Fertility preservation serves such a wide range of medico-soc...