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1.
2.
The growth response ofCalopogonium caeruleum, a leguminous covercrop in plantation agriculture, to inoculation with two vesicular-arbuscular mycorrhizal (VAM) fungi was
investigated in five phosphorus (P)-deficient soils supplied with various levels of rock phosphate. Significant shoot yield
increases over the uninoculated controls were obtained in most sterilised or unsterilised soils at all applied P levels, although
the inoculant VAM fungi differed in their effectiveness in the soils used. Responses in mycorrhizal root infections, P and
nitrogen (N) concentrations in tops and plant nodulation varied. The results are discussed in relation to the edaphic environment
of the mycorrhizal association. 相似文献
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4.
Fundamental genetic studies were initiated for the monoecious red alga Gelidium vagum. Color and sterility mutants were isolated and characterized to provide genetic tools, initially to identify hybrid plants when they occurred in crosses, and secondarily to eliminate self-fertilization altogether. When fertility phenotypes were scored, rapid onset of reproduction in culture was favored by long day-length, moderately high irradiance levels from fluorescent lights, warm temperature and the addition of Tris buffer to the medium. A recessive green mutant (designated grn 1) was characterized and used in subsequent crosses to allow a clear distinction between non-hybrid (green) and hybrid (red) offspring. Additional color mutants and a variety of reproductive mutants were also isolated and characterized. Male-sterile mutants had phenotypes ranging from apparently normal plants to those that produced no spermatia. Female-sterile mutants also included a variety of phenotypes, some plants having post-fertilization malfunctions during the development of the carposporophyte. Only a fraction of the sterility mutations have been phenotypically or genetically characterized, but some are straightforwardly inherited as stable, nuclear, single-gene defects. From the genetic recombination pattern, one female-sterile mutant may be loosely linked (39 cMorgans) to the grn 1 marker gene. Male sterility very effectively eliminated selfing without affecting the production of carpospores in crosses, thereby overcoming one of the most serious genetic difficulties in working with this monoecious species. 相似文献
5.
M Alam M Ahmad A Rasheed M Saleem M K Javaid S Ikram 《Indian journal of experimental biology》1990,28(10):940-942
The metabolic fate of isatin hydrazone (Ia), isatin-3-thiosemicarbazone (Ib), isatin-3-semicarbazone (Ic), isatin-3-phenylhydrazone (Id), isatin oxime (Ie) and 3-hydroxy-3-acetonyl oxindole (II) was studied in rabbits. The compounds were administered orally in the dose of 300 mg/kg body wt. Isatin anthranilic acid, tryptophan and nicotinic acid were identified as the major metabolites excreted in urine. The 3-hydroxy-3-acetonyl oxindole (II) gave on additional metabolite, oxindole. The major metabolites were separated and identified unambiguously on thin layer silica gel plate. Metabolic pathways have been proposed to explain the biotransformation of the compounds investigated. 相似文献
6.
Syed Mohsin Waheed Arnab Ghosh Ritu Chakravarti Ashis Biswas Mohammad Mahfuzul Haque Koustubh Panda Dennis J. Stuehr 《Free radical biology & medicine》2010,48(11):1548-1558
Although the insertion of heme into proteins enables their function in bioenergetics, metabolism, and signaling, the mechanisms and regulation of this process are not fully understood. We developed a means to study cellular heme insertion into apo-protein targets over a 3-h period and then investigated how nitric oxide (NO) released from a chemical donor (NOC-18) might influence heme (protoporphyrin IX) insertion into seven targets that present a range of protein structures, heme ligation states, and functions (three NO synthases, two cytochrome P450's, catalase, and hemoglobin). NO blocked cellular heme insertion into all seven apo-protein targets. The inhibition occurred at relatively low (nM/min) fluxes of NO, was reversible, and did not involve changes in intracellular heme levels, activation of guanylate cyclase, or inhibition of mitochondrial ATP production. These aspects and the range of protein targets suggest that NO can act as a global inhibitor of heme insertion, possibly by inhibiting a common step in the process. 相似文献
7.
Farhan Haq Salmaan Sharif Adnan Khurshid Aamer Ikram Imran Shabbir Muhammad Salman Abdul Ahad Muhammad Suleman Rana Aroosha Raja Nazish Badar Hanaa Tashkandi Turki Al Amri Esam I. Azhar Mohammed S. Almuhayawi Steve Harakeh Muhammad Faraz Arshad Malik 《Saudi Journal of Biological Sciences》2021,28(1):942
8.
Afsheen Sumera Ahmad Anam Iqbal Tahir Ijaz Mohsin Bashir Almas 《Plasmonics (Norwell, Mass.)》2021,16(2):541-546
Plasmonics - This paper investigates the behavior of the surface plasmon polaritons (SPPs) on dielectric-metal interface using Ag thin film on glass substrate. The Kretschman configuration, which... 相似文献
9.
Muhammad Afzal Imran Kazmi Anwarulabedin Mohsin Quazi Aftab Ahmad Fahad A. Al-Abaasi Faisal Imam Khalid Saad Alharbi Sami I. Alzarea Ameeduzzafar Zafar 《Saudi Journal of Biological Sciences》2021,28(6):3418-3423
The 6-shogaol, is a flavanone type flavonoid that is abundant in citrus fruit and has a wide range of pharmacological effects. The present study attempted to evaluate the antiurolithic effect of 6-shogaol on ethylene glycol (EG) and ammonium chloride (AC)-induced experimental urolithiasis in rats. The efficacy of 6-shogaol 50 mg/kg and 100 mg/kg was studied in EG 0.75% (V/V) and AC 1% (W/V) experimentally induced urolithiasis in rats for 21 days. The weight difference, urine volume, the levels of calcium, phosphate, magnesium, oxalate and uric acid in urine was observed. The blood urea nitrogen, creatinine, uric acid in serum and levels of malondialdehyde (MDA) and glutathione (GSH) were also measured. Histopathological analyses in kidneys were also performed. The rats weights were higher in the 6-shogaol groups than the urolithiasis group. EG caused a significant increase in serum creatinine (p < 0.05), BUN (P < 0.001), and uric acid (p < 0.01) while treatment with Cystone (750 mg/kg), and 6-shogaol (50 and 100 mg/kg) showed the significant reduction in increased serum levels of creatinine (p < 0.001), uric acid (p < 0.01) and BUN (p < 0.001). Administration of EG and AC showed statistically significant (p < 0.001) elevated levels of MDA and reduction in GSH levels. Treatment of Cystone (750 mg/kg), and 6-shogaol (50 and 100 mg/kg) significantly (p < 0.001) reduced MDA levels and an increase GSH levels as compared to EG and AC-treated group. The histological findings further attested antiurolithiatic properties of 6-shogaol. The present study attributed clinical shreds of evidence first time that claiming the significant antiurolithic effect of 6-shogaol and could be a cost-effective candidate for the prevention and treatment of urolithiasis. 相似文献
10.
Rajkumar Dorajoo Ruoying Li Mohammad Kamran Ikram Jianjun Liu Philippe Froguel Jeannette Lee Xueling Sim Rick Twee-Hee Ong Wan Ting Tay Chen Peng Terri L. Young Alexandra I. F. Blakemore Ching Yu Cheng Tin Aung Paul Mitchell Jie Jin Wang Caroline C. Klaver Eric Boerwinkle Ronald Klein David S. Siscovick Richard A. Jensen Vilmundur Gudnason Albert Vernon Smith Yik Ying Teo Tien Yin Wong E-Shyong Tai Chew-Kiat Heng Yechiel Friedlander 《PloS one》2013,8(7)