bovine leukemia provirus: evidence of presence of part of gag gene inseminal plasma of naturally infected bullsit is of critical importance to understand the modalities of blv presence in semen, especially with regard to artificial insemination (ai). presence of bovine leukemia provirus was demonstrated in fresh and frozen semen samples by researchers. in this study paired blood and semen sampl...

Seminal fluids are known to have a variety of effects on rival sperm, but in externally fertilizing species it is still unclear what effects seminal fluid can induce under sperm competition. We recorded sperm activity from natural ejaculates (including own seminal fluid) of an external fertilizer, the Arctic charr (Salvelinus alpinus), after activation either in water (the natural medium for mi...

Two experiments were designed to examine the effects of crude seminal plasma (CSP) exposure ofejaculated and epididymal spermatozoa before freezing. Experiment 1, two consecutive ejaculates werecollected (n=4) within 5 min, the second one was carried out in a tube containing Fiser extender (coatedspermatozoa); by centrifugation, seminal plasma was removed from coated ejaculates. The pellets wer...

The root system architecture (RSA) in monocotyledonous plants like rice is consists of primary roots, lateral seminal/crown and hairs. soil nutrients also influence many physiological processes via various parameters length, diameter angle for growth development. variation influenced by the intrinsic factors (phytohormones, transcription factors) extrinsic (light, temperature moisture) their co...

objective: cigarette is a rich source of oxidants and reactive nitrogen species. nitric oxide (no) in high concentration has deleterious effects on human sperm function. antioxidant defense system in seminal plasma protects spermatozoa from the attack of reactive oxygen metabolites. the purpose of this study was to determine the correlation between cigarette smoking with the no levels and the t...

conclusions these results suggest that serum cholesterol, phospholipids and triacylglycerols have no effect on the levels of cholesterol, phospholipids and triacylglycerols of spermatozoa and seminal plasma. our findings suggest that sperm lipid content is regulated locally within the male reproductive tract. patients and methods cholesterol, phospholipids and triacylglycerols in sperm cells, s...

Geneticists and breeders are positioned to breed plants with root traits that improve productivity under drought. However, a better understanding of root functional traits and how traits are related to whole plant strategies to increase crop productivity under different drought conditions is needed. Root traits associated with maintaining plant productivity under drought include small fine root...

Pb is a metal which is highly toxic to plants and animals, including humans. High concentrations of Pb have been observed in beans of T. cacao, as well as in its products. In this work, we evaluated the molecular, biochemical, and ultrastructural alterations in mature leaves and primary roots of seedlings of two progenies of T. cacao, obtained from seed germination in different concentrations o...

Observed phenotypic variation in the lateral root branching density (LRBD) in maize (Zea mays) is large (1-41 cm(-1) major axis [i.e. brace, crown, seminal, and primary roots]), suggesting that LRBD has varying utility and tradeoffs in specific environments. Using the functional-structural plant model SimRoot, we simulated the three-dimensional development of maize root architectures with varyi...