Investigation on Cultural Characterization and Parasexual Recombination in Pyricularia Grisea, Causal Agent of Blast of Rice

Blast of rice caused by Pyricularia grisea is one of the most devastating diseases of rice. Because of importance of the disease and the fact that pyricularia grisea is considered to be notorious and model species. The variability in cultural characteristics of fifty isolates of P. grisea were taken from different regions of Jharkhand state. Out of fifty isolates of P. grisea, colony color of six isolates were found to be as greyish white color, three isolates were blackish grey, six isolates as white color, three isolates as whitish grey color, five isolates were whitish black and twenty seven isolates were recorded as blackish white in color. The growth pattern of 47 isolates of P. grisea showed circular growth pattern and three isolates have irregular growth pattern but elevation of the mycelium differs from flat to raised. Out of fifty isolates of P. grisea, sector formation was observed in seventeen isolates and no sector formation was observed in rest isolates. The radial growth of fifty isolates of P. grisea were ranged from 76.0 mm to 90.0 mm. Out of fifty isolates, group I included six isolates, group II and III included eleven and thirty three isolates, respectively. Parasexual recombination rarely causes genetic and phenotypic variation through hyphal anastomosis in India. Parasexual recombination is the principle cause in rice blast fungus and cause infection of resistant rice variety (IR-64) in India .

A Review on Medicinal Plants with Antiangiogenic Activity Available in Iraq

Aims: To correlate the antiangiogenic effect of medicinal plants available in Iraq. Study Design: Study design by correlate different study and article about the antiangiogenic activity of different plant available in Iraq and make collection of different information of medicinal plant grow in Iraq. Methodology: We included the irregular growth of blood vessels contributes to the pathogenesis of many diseases, which has a major impact on human health. Indeed, a long list of disorders is characterized and caused by excessive angiogenesis. Historically, the best known disorders stemming from angiogenesis are cancer, psoriasis, arthritis and blindness, but many additional common disorders such as obesity, asthma, atherosclerosis and infectious disease and correlate different plant by activity with antiangiogenic properties. Results: The plant sources of Iraq are likely to provide effective antiangiogenic substances. All examples that are provided in this review of promising bioactive materials obtained from different plants with other therapeutic uses. Conclusion: Aerial part of different plant in Iraq possess antiangiogenic activity has crucial activity to treat disease relate angiogensis.

QUANTITATIVE ASSESSMENT OF ANISOCOTYLY IN HABERLEA RHODOPENSIS AND RAMONDA MYCONI

Anisocotyly, the unequal development of cotyledons post germination, is a unique trait observed only in Old World Gesneriaceae (Lamiales). New World Gesneriaceae have isocotylous seedlings. In both Old and New World Gesneriaceae, cotyledons initially grow equally for a short period just after germination. In the New World species, both cotyledons cease their growth at the same time early on, whereas in Old World species one cotyledon continues to expand to become a macrocotyledon while the other withers away. In this study, cotyledon growth was observed in two European Old World Gesneriaceae: Haberlea rhodopensis and Ramonda myconi. The results were compared with those for the typical anisocotylous species Streptocarpus rexii and the typical isocotylous species Corytoplectus speciosus. We found that the cotyledon growth patterns in Haberlea rhodopensis and Ramonda myconi were intermediate between the typical anisocotylous or isocotylous species. Haberlea rhodopensis and Ramonda myconi showed irregular growth patterns, with some plants being slightly anisocotylous but most being isocotylous. The developmental basis for the residual anisocotyly, the extended basal meristem activity in the macrocotyledon, appeared to be identical in the European species to that in the typical Old World Streptocarpus rexii but weakly expressed, rare and terminated early. In conclusion, European Gesneriaceae retain a reduced anisocotylous growth that may be linked to their early plumule development.

Chronic uterine inversion with malignancy mimicking carcinoma cervix

Chronic non-puerperal uterine inversion is a rare event, with only a handful of cases reported in literature. We report a case of a 64-year-old postmenopausal woman who presented with complaints of mass per vaginam and postmenopausal bleeding. On examination, she appeared to have third-degree cervical descent with an irregular growth seen over what appeared to be the cervix, biopsy of which showed keratinising squamous cell carcinoma. Subsequently, an inverted uterus was diagnosed at laparotomy with an irregular growth seen over the inverted portion of the uterine fundus, histopathology of which revealed squamous cell carcinoma of endometrium.

The root system of pedunculate oak (Quercus robur L.) at the margins of regenerated stands

The paper aims to contribute to the determination of reasons causing the irregular growth of young pedunculate oaks occurring at the margins of naturally and artificially regenerated plots neighbouring with adult stands on alluvial sites. It presents analyses of aboveground biometric parameters, mortality, root system architecture of young trees, root density in the soil profile, global solar radiation and soil moisture content in dependence on the location of oaks at the northern, southern, eastern or western margins of the regenerated area and on the distance from the stand margin. The highest impact of the neighbouring adult stand is always recorded on the margin of the regenerated plot while its effect is weakening towards the plot centre, and fading away ca. 7 m behind the crown projection of adult trees. Regardless of the oak location (northern, southern, eastern or western margin), the cause is a high root density of marginal trees of the adult stand, which induces the critical lack of water under their crown projections.

Cytological effect of Tilt 250 EC in the successive phases of the Triticale rust disease process caused by Puccinia recondita f. sp. tritici

The disease process caused by rust (<em>Puccinia recondita</em> f. sp. <em>tritici</em>) in <em>Triticale</em> (<em>Triticale</em>-Wittmack cv. Bolero) and the effect of the application of the propikonazole - Tilt 250 EC are described. In plants not protected chemically one could observe the whole pathogen developmental cycle ending with the appearance of uredinia with urediniospores. The highest pathogen susceptibility to chemical agent was observed at the time of inoculation, during incubation and at the beginning of the actual disease. By inhibiting the ergosterol biosynthesis in the fungus cells the preparation (propikonazole) inhibited the development of the intra- and extracellular mycelium. The mycelium degeneration manifested itself by the irregular growth of intercellular hyphae, perforation of septa, homogenization of protoplasts and cell collapse. The thickening of the cell wall, modification of the perihaustorial space and protoplast obliteration were observed in the haustoria.

Cytological changes observed in the successive phases of the wheat rust caused by Puccinia recondita f. sp. tritici after the treatment with Tilt 250EC

The disease process of wheat (<i>Triticum aestivum</i>) cv. Parada caused by rust (<i>Puccinia recondita</i> Rob. ex Desm. f. sp. <i>tritici</i>) and the effect of applying the fungicide Tilt 250EC are described. The application of spraying at the time of inoculation, during incubation and at the beginning of the actual disease is most effective, thus attests to the highest pathogen susceptibility to that chemical agent at these phases of the disease. Tilt 250EC (propikonazole) inhibits the ergosterol biosynthesis in the fungus cells. Application of the preparation caused the inhibition of the development and necrosis of the intra- and extracellular mycelium. Observed were: irregular growth of intercellular hyphae, perforation of septas, homogenization of protoplasts and collapsing of cells. In the haustoria observed were: the thickening of the cell wall, modification of the perihaustorial space, protoplast degeneration and finally the haustorium obliteration.