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1.
Chloroplast (cp) and mitochondrial (mt) DNA restriction profiles of a cytoplasmic male sterile (CMS) line of Brassica juncea and its maintainer line were compared and found to be markedly different. Comparison of cpDNA restriction profiles of fifty different species of genus Brassica and some allied genera showed that the cpDNA profiles of CMS lines were similar to that of B. tournefortii for twenty different restriction endonucleases. This CMS system is thus not of spontaneous origin as reported earlier, but is alloplasmic in nature. Comparison of restriction profiles of mtDNA of B. tournefortii and CMS lines revealed some differences which might either be due to changes in DNA pattern during the transfer, or, due to the cytoplasm coming from a B. tournefortii line different from the one used in this study. 相似文献
2.
Arundhati Das Jagdish Krishnaswamy Kamaljit S. Bawa M.C. Kiran N. Samba Kumar 《Biological conservation》2006,133(1):16-31
Areas of high conservation value were identified in the Western Ghats using a systematic conservation planning approach. Surrogates were chosen and assessed for effectiveness on the basis of spatial congruence using Pearson’s correlations and Mantel’s tests. The surrogates were, threatened and endemic plant and vertebrate species, unfragmented forest areas, dry forests, sub-regionally rare vegetation types, and a remotely sensed surrogate for unique evergreen ecosystems. At the scale of this analysis, amphibian richness was most highly correlated with overall threatened and endemic species richness, whereas mammals, especially wide-ranging species, were better at capturing overall animal and habitat diversity. There was a significant relationship between a remote sensing based habitat surrogate and endemic tree diversity and composition. None of the taxa or habitats served as a complete surrogate for the others. Sites were prioritised on the basis of their irreplaceability value using all five surrogates. Two alternative reserve networks are presented, one with minimal representation of surrogates, and the second with 3 occurrences of each species and 25% of each habitat type. These networks cover 8% and 29% of the region respectively. Seventy percent of the completely irreplaceable sites are outside the current protected area network. While the existing protected area network meets the minimal representation target for 88% of the species chosen in this study and all of the habitat surrogates, it is not representative with regard to amphibians, endemic tree species and small mammals. Much of the prioritised unprotected area is under reserve forests and can thus be incorporated into a wider network of conservation areas. 相似文献
3.
D Atluru U Sayana W C Yang R D Schultz 《Veterinary immunology and immunopathology》1987,14(3):269-278
AA861, a specific 5-lipoxygenase inhibitor, inhibited bovine lymphocyte response to phytohemagglutinin (PHA). Mitogen-stimulated cultures of mononuclear cells produced leukotriene B4 (LTB4) in 24 hours. The production of LTB4 was completely inhibited by concentrations of AA861 that inhibited mitogen-induced 3H-thymidine incorporation. The inhibition of lymphocyte proliferation was totally reversed by LTB4 but not by leukotriene C4 or leukotriene D4. The inhibition of interleukin-2 (IL-2) production by AA861 was also completely reversed by addition of exogenous LTB4 to lymphocyte cultures. Thus, endogenous LTB4 production appeared to be necessary for PHA-induced IL-2 production and lymphocyte proliferation. 相似文献
4.
A study was conducted to determine the presence of surface antigens on cultured cells of bovine ocular squamous cell carcinoma (BOSCC) by serological testing. Serum from cattle with plaque and malignant stages of disease were tested for reactivity with surface antigens of cultured autologous and allogeneic cells. Indirect immune fluorescence assays were conducted to determine the presence of antibodies towards these tumor cells. It was found that sera tested possessed antibodies to the cultured tumor cells. Further, no surface reactivity was observed when these sera were tested for reactivity with normal epithelial cells. Reactive sera were analyzed by absorption tests with autologous and allogeneic cells. Absorbed sera showed no reactivity to surface antigens or allogeneic cells. This study suggests that there might be a shared antigen among the cells from plaque and malignant lesions. 相似文献
5.
Prattipati Subhashini Devi Botcha Satyanarayana Atluru Arundhati Tamanam Raghava Rao 《Journal of Crop Science and Biotechnology》2014,17(1):21-25
The present study is an attempt to prepare synthetic seeds using alginate encapsulation of nodal explants of Sterculia urens. Regeneration potential of encapsulated nodal segments was tested on MS basal, MS + BA (3.0 mg L?1), MS + TDZ (0.2 mg L?1), and MS + BA (0.5 mg L?1) + NAA (2.0 mg L?1). The regeneration potential was maximum (73.33 ± 1.33) on MS + TDZ (0.2 mg L?1) followed by (69.33 ± 1.76) on MS + BA (3 mg L?1) even after 6 months of storage at 4°C, whereas controls did not show any regeneration potential after 1 week. These findings suggest synthetic seed technology as an alternative method for micropropagation and germplasm conservation of Sterculia urens an endangered species. 相似文献
6.
Dhar P Chattopadhya K Bhattacharyya D Biswas A Roy B Ghosh S 《Journal of agricultural and food chemistry》2007,55(14):5875-5880
Sesame lignans are working as antioxidants in various physiological functions. In the present study, the antioxidative effect of sesame lignans is examined in chemically induced diabetes mellitus (DM) in rats against lipid profile and lipid peroxidations. DM was induced in four groups of rats by injection of alloxan. The control groups (non-diabetic and diabetic) received a diet containing sunflower oil while the rest of the three experimental diabetic groups received a diet containing 0.25% alpha-tocopherol (D-Toc), 0.5% sesame lignan (D-SL), and 0.25% alpha-tocopherol+0.25% sesame lignan (D-Toc-SL) in sunflower oil for 4 weeks. Lipid profile and lipid peroxidations of plasma, erythrocyte membrane (EM), and liver tissues were measured. The total cholesterol, non-HDL cholesterol, plasma lipid peroxidation, and also LDL-peroxidation decreased, and HDL cholesterol increased significantly (P<0.05) in all the experimental groups as compared to the control diabetic sunflower oil group. The triacylglycerol (TAG) level in plasma decreased significantly in the D-SL and D-Toc-SL groups as compared to control diabetic group. Significant decrease in TAG level was observed in the D-SL group as compared to the D-Toc group. LDL peroxidation also decreased significantly in the D-Toc-SL group as compared to the D-Toc group. EM lipid peroxidation and liver lipid peroxidation decreased significantly in the D-Toc, D-SL, and D-Toc-SL groups as compared to the control diabetic group. Liver TAG level decreased more significantly in the D-SL and D-Toc-SL groups than in the control diabetic group. So, sesame lignans at 0.5% level and sesame lignan + alpha-tocopherol significantly ameliorate the alteration in lipid profile and the adverse free radical generative influence of DM induced by alloxan. 相似文献
7.
D Atluru E D Sloane D W Johnson C C Muscoplat 《American journal of veterinary research》1980,41(8):1319-1322
Removal of calcium from cultures of bovine splenic lymphoid cells with ethyleneglycol-bis-(2-amino ethylether)-N,N'-tetraacetic acid (EGTA) caused significant suppression of pokeweed mitogen-induced immunoglobulin (Ig) biosynthesis. It was found that removal of calcium for 48 hours of a 5-day culture significantly altered Ig biosynthesis. Re-addition of calcium after 48 hours did not restore Ig synthesis. The EGTA caused significant (P < 0.05) suppression of DNA synthesis when calcium was removed from concanavalin A- and purified protein derivative-stimulated peripheral blood lymphocyte cultures. Further, removal of calcium for 48 hours of 4-day cultures significantly altered the DNA synthesis in mitogen- and antigen-stimulated cultures. 相似文献
8.
Akshay K. Pradhan Yaspal S. Sodhi Arundhati Mukhopadhyay Deepak Pental 《Euphytica》1993,69(3):219-229
Summary Divergence of 25 accessions of Brassica juncea of Indian, CIS (Commonwealth of Independent States, former USSR) and synthetic origin was studied by D2 analysis. On the basis of divergence, ten accessions were selected and crossed in a diallel fashion without reciprocals to study the combining ability and heterosis. None of the accessions was found to be a good general combiner for all the nine quantitative characters that were studied. Significant heterosis over better parent for single plant yield was recorded in CIS x Indian and synthetic x CIS crosses (5 each) followed by Indian x synthetic types (3). The analysis of component characters showed that the mean performance of the majority of hybrids was intermediate for five out of six yield attributing traits, thus exhibiting dominance or partial dominance effect. To estimate the contribution of such yield attributing traits towards heterosis for yield, a comparison was made among three parameters viz. heterosis over mid parent (MP), better parent (BP) and better yielding parent (BYP) of the concerned hybrid. It was observed that estimation of heterosis from BYP was a more accurate method to determine the contribution of component characters towards yield heterosis than the analysis based on MP and BP. From the component character analysis, it was concluded that characters like number of primary and secondary branches, number of siliqua per plant and siliqua density contributed significantly towards heterosis in yield. Plot level yield trials of two selected hybrids (Skorospieka II x RH30 and Donskaja IV x Varuna) over two growing seasons revealed 29.4 to 91.8% heterosis over BYP. 相似文献
9.
D Atluru S Gudapaty W Xue F Gurria M M Chengappa D S McVey H C Minocha S Atluru 《Veterinary immunology and immunopathology》1992,31(1-2):49-59
Bovine viral diarrhea (BVD) virus inhibited phytohemagglutinin (PHA)-, PHA plus phorbol-12-myristate-13 acetate (PMA)- or PHA plus calcium ionophore (A23187)-stimulated bovine peripheral blood mononuclear cell (PBMC) proliferation. Further, BVD-virus inhibited A23187-stimulated leukotriene B4 (LTB4) synthesis into the culture supernatants. Presence of exogenous LTB4 failed to reverse the BVD virus-induced immunosuppression. Our results suggest that BVD virus-induced immunosuppression is due to a factor that may be necessary to induce LTB4 synthesis for normal mononuclear cell proliferation. 相似文献
10.