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Summary Six carbamate pesticides namely 1-naphthol, sevin, dimetilan, trematan, NaDDC and dymid were studied to see their effect on
nodulation and nitrogen fixation inPisum sativum andVigna sinensis. Low concentrations of the pesticides have little effect on nodulation and nitrogen fixation, whereas higher concentrations
adversely effect these processes. The results also indicate that then sensitivity depends upon the species of the Rhizobium
and also the type of the pesticide. Pesticides belonging to the carbamate group differ in their capacity to affect nodulation
and nitroge fixation. 相似文献
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Isolation and functional characterization of hydrocarbon emulsifying and solubilizing factors produced by a Pseudomonas species 总被引:1,自引:0,他引:1
Reddy PG Singh HD Pathak MG Bhagat SD Baruah JN 《Biotechnology and bioengineering》1983,25(2):387-401
Pseudomonas PG-1 cultivated on pristane produced in good amount a heat-stable polymeric substance which showed strong hydrocarbon emulsifying and solubilizing properties. The substance was isolated in crude form and was found to contain 34% protein, 16% carbohydrate, and 40% lipid. The hydrocarbon solubilizing activity of the isolate was strongly inhibited by EDTA but the chelating agent had no effect on the hydrocarbon emulsifying activity. Both activities of the isolate were strongly inhibited by chymotrypsin treatment indicating the importance of the protein moiety for its activity. Hydrocarbon solubilization by the isolate showed a certain degree of specificity to pristane in modest agitation generally used in microbial cultivation, but this specificity was lost by vigorous agitation in a Waring blender. It was proposed that in the first case, solubilization was effected by a solubilizing factor specific to pristane, whereas in the latter case, nonspecific solubilization occurred due to the action of the emulsifying factor. The rate of pristane solubilization by heat-treated culture broth under the conditions of agitation used in cultivation (rotary shaker, 120 rpm) was found to be ca. 750 mg L(-1) h(-1) which was much larger than the maximal pristane uptake rate of 170 mg L(-1) h(-1) observed during microbial growth on the substrate. It was concluded that hydrocarbon solubilization could satisfactorily account for the substrate uptake and growth. 相似文献
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Neeru Jain Shruti Gupta Shashi B. Babbar 《Journal of plant biochemistry and biotechnology.》1997,6(2):129-131
Isubgol, the mucilaginous husk derived from the seeds of Plantago ovata, has been successfully used as a gelling agent for microbial culture media. As illustrative examples, fast growing symbiotic bacterium, Rhizobium meliloti and saprophytic fungi, Aspergillus flavus and Penicillium chrysogenum were cultured on media gelled with either Isubgol or agar. All the three microbes employed in the study exhibited normal growth when cultured on their respective media gelled with Isubgol. Rather, Isubgol gelled medium appears to promote the growth of bacterial cultures as the colonies on this medium were denser than the corresponding ones on the medium gelled with agar. Likewise, on Isubgol gelled medium, sporulation in both the fungi took place earlier than on the medium gelled with agar, thus indicating the promotive influence of the former gelling agent. 相似文献
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Bhagat Prakash Kumar Verma Deepanjali Sharma Deepika Sinha Alok Krishna 《Plant molecular biology》2021,107(1-2):117-127
Plant Molecular Biology - Cross-talk between light and ABA signaling is mediated by physical interaction between HY5 and ABI5 Arabidopsis. Plants undergo numerous transitions during their... 相似文献
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Krishna Kumar Natarajan Amaresan Someshwar Bhagat Kutthum Madhuri Palaniswamy Udhayaraj Ramesh Chandra Srivastava 《Archives Of Phytopathology And Plant Protection》2013,46(14):1399-1409
In this study, the in vitro potential of 42 Trichoderma spp. were evaluated against four isolates of soil borne phytopathogenic fungi viz., Rhizoctonia solani, Macrophomina sp., Sclerotium rolfsii and Pythium aphanidermatum in dual culture techniques and through production of volatile and non-volatile inhibitors. In vitro screening results showed that the proportion of isolates with antagonistic activities was highest for the S. rolfsii followed by R. solani, Macrophomina sp. and P. aphanidermatum, respectively. The isolates TNT1, TNP2 and TWP1 showed consistent results in volatile and non-volatile activity in vitro against any of the two pathogens tested. Based on genomic finger prints, potential isolates showed no particular correlation between the origin of the isolates and the Random Amplified Polymorphic DNA (RAPD) groups could not be established. However, the polymorphism shown by the isolates did not correlate to their level of antagonism. Whereas, in physiology studies using BIOLOG (microbial identification system), three groups were formed, one group consists with 14 different Trichoderma species and two groups with two isolates each comprised of only T. koningii and T. viride. 相似文献
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Neeru Singh Praveen K. Bharti Mrigendra P. Singh Sweta Mishra Man M. Shukla Ravendra K. Sharma Rajesh K. Singh 《PloS one》2013,8(3)