Seed Invigoration by Hydration–Dehydration for Improvement of Seed Quality in Safflower (Carthamus tinctorius L.)     

K. Ramamoorthy  N. Natarajan 《Journal of Agronomy and Crop Science》1997,178(2):125-128

Three midstorage hydration-dehydration treatments viz., soaking, moisture equilibration and moist-sand conditioning followed by drying, each at varying durations for preservation of vigour and viability during storage in safflower var. K.1, were evaluated for their efficacy. Soaking seeds for 3 h followed by dehydration proved to be the best. Maintenance of membrane integrity and counteraction of lipid peroxidation may be the possible reasons for such advantage as evidenced by lower electrical conductance and peroxide values in the best treatment.  相似文献   

Control of Aeromonas hydrophila Infection in Spotted Snakehead, Channa punctatus, by Solanum nigrum L., a Medicinal Plant     

A. Rajendiran  E. Natarajan  P. Subramanian 《Journal of the World Aquaculture Society》2008,39(3):375-383

The present study describes the potential of black nightshade, Solanum nigrum , to control Aeromonas hydrophila infection in spotted snakehead, Channa punctatus . Similar sizes of Ch.   punctatus were grouped into three categories as follows: control (injected with sterilized water), Ae.   hydrophila infected   +   untreated, and Ae.   hydrophila infected   +   treated with S.   nigrum leaf extract. Hematological parameters (white blood cell [WBC], red blood cell [RBC], hemoglobin [Hb], and packed cell volume [PCV]) were analyzed in these fishes once every 5   d from Days 5 to 30 postexposure. Preliminary antibacterial assay reported that leaf extracted with ethyl acetate had the maximum inhibition compared to other parts of the plant (i.e., berries and whole plant) or when extracted with other solvent extracts (chloroform and ethanol). Except for WBC count, all other parameters showed a declining trend from Day 5 onward and reaching to a minimum on Day 30 in Ae.   hydrophila -infected fish, whereas the WBC count increased. The infected fish treated with S.   nigrum leaf extract reported a significant reversion to normal RBC, WBC, Hb, and PCV levels and the skin ulceration recovered within a short period. The antiulcer potential of the medicinal plant as described in humans may be extended to the fish population.  相似文献   

Baseline sensitivity of maize borers in India to the Bacillus thuringiensis insecticidal proteins Cry1A.105 and Cry2Ab2          下载免费PDF全文

Sushil K Jalali  Lalitha Yadavalli  Rakshit Ojha  Pradyumn Kumar  Suby B Sulaikhabeevi  Reema Sharma  Rupa Nair  Ravi C Kadanur  Subray P Kamath  Mohan S Komarlingam 《Pest management science》2015,71(8):1082-1090

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Preliminary evaluation of anti-pyretic and anti-ulcerogenic activities of Sida cordifolia methanolic extract     

Philip BK  Muralidharan A  Natarajan B  Varadamurthy S  Venkataraman S 《Fitoterapia》2008,79(3):229-231

The anti-pyretic and anti-ulcerogenic properties of methanolic extract of Sida cordifolia aerial parts (MESC) were investigated in rats. Oral dose of 500 mg/kg MESC significantly reduced pyrexia induced by TAB vaccine. MESC exhibited significant anti-ulcerogenic effect against aspirin and ethanol induced damage. Both these properties were comparable to the reference drugs.  相似文献   

印度西高止山脉全球濒危物种灰头林鸽的觅食生态学          下载免费PDF全文

Sellamuthu SOMASUNDARAM  Lalitha VIJAYAN 《中国鸟类》2010,1(1):9-21

在印度西高止山脉(Western Ghats),通过粪便取样和直接观察两种方法,对全球濒危物种灰头林鸽(Columba elphinstonii)的觅食生态进行了研究.结果表明,灰头林鸽取食39种植物的果实、11种植物的种子、4种植物的花和叶芽,以及少量地面无脊椎动物.不同季节的直接观察结果显示,有9种植物的被取食频率较高(占观察总次数的47%),其中取食樟科植物果实的频次最高.灰头林鸽主要在树冠中上部(高于6米)外围的树枝上取食,全年中拾取行为占取食方法的76%.取食果实的频率与果实丰富度显著相关,而后者由降雨量决定.本研究表明,林鸽在不同森林资源条件下需要一个多样化的食物谱.保护这一物种需要保留其全年所需资源的所有栖息地类型.  相似文献   

Abundant class III acidic chitinase homologue in tamarind (Tamarindus indica) seed serves as the major storage protein     

Rao DH  Gowda LR 《Journal of agricultural and food chemistry》2008,56(6):2175-2182

The phyla Leguminosae contains protease inhibitors, lectins, chitinases, and glycohydrolases as major defense proteins in their seeds. Electrophoretic analysis of the seed proteins of tamarind ( Tamarindus indica L.), an agri-waste material, indicated the unusual presence of two major proteins comparable to overexpression of recombinant proteins. These proteins were identified by amino-terminal analysis to be (1) Kunitz-type trypsin inhibitor and (2) class III endochitinase (34000 Da). These two proteins were purified to apparent homogeneity by a single-step chitin bead affinity chromatography and characterized. The Kunitz inhibitor was specific toward inhibiting trypsin with a stoichiometry of 1:1. The 33000 +/- 1000 Da protein, accounting for >50% of the total seed protein, is an acidic glycoprotein exhibiting a very low endotype hydrolytic activity toward chitin derivatives. SDS-PAGE followed by densitometry of tamarind seed germination indicates the disappearance of the chitinase with the concomitant appearance of a cysteine endopeptidase. On the basis of its abundance, accumulation without any pathogenesis-related stimulus, temporal regulation, amino acid composition, and very low enzyme activity, this 34000 Da protein designated "tamarinin" physiologically serves as the major storage protein.  相似文献   

Evaluation of conjunctival bacterial flora in a herd of goats in the Midwestern United States          下载免费PDF全文

Jessica M. Meekins  Michael D. Apley  Brian Lubbers  Lalitha Peddireddi  Amy J. Rankin 《Veterinary ophthalmology》2017,20(1):40-45

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Assessment of impact of aquaculture on Kolleru Lake (India) using remote sensing and Geographical Information System     

Marappan Jayanthi  Peter Nila Rekha  Natarajan Kavitha  & Pitchaiyappan Ravichandran 《Aquaculture Research》2006,37(16):1617-1626

Aquaculture is one of the fastest growing food industries and the rapid growth of aquaculture worldwide has resulted in growing concerns about its impact on important ecosystems. Kolleru Lake, India's largest fresh water body, and Ramsar site have undergone tremendous changes due to the development of aquaculture. To assess the impact of aquaculture on Kolleru, satellite data were found appropriate because of the synoptic‐detailed overview and accuracy. Satellite data of IRS 1D, LISS III from 2004 and Survey of India topographic maps from 1967 were processed using image processing techniques in erdas imagine and analysed in Geographical Information System (GIS) such as arc gis 9.1. Land use map prepared from the satellite data was verified in the field using Global Positioning System to check the land and water use classes and its areal extent. It was estimated from the topographic maps of 1967 that the total lake boundary area was 180.38 km², in which 70.70 km² had water throughout the year and 100.97 km² had water during the rainy season. The digital image processing of 2004 satellite data revealed that Kolleru was no longer a lake and the lake area of 62.65 km² (34.73%) only remained in a degraded state, extensively colonized by macrophytes. The total loss of lake area was 109.02 km² between 1967 and 2004, in which aquaculture was developed in 99.74 km², which represented 55.3% of the 1967 lake area. The maximum conversion to aquaculture occurred from the lake liable to be inundated during the 1967 rainy season. The area under agriculture was 16.62 km² in 2004, the increase in lake area for agriculture between 1967 and 2004 being 8.22 km² (4.55% of lake). If human induced degradation is allowed to continue, the lake will very soon disappear. Now, the Government of Andhra Pradesh, India, has initiated schemes and laws to restore the lake to its pre‐development state. Lessons learnt from the Kolleru Lake cautioned that there is a need for regular monitoring of important water resources throughout the world to protect the biodiversity of the earth.  相似文献   

Effect of Ultraviolet Pretreatment on Yield of Mutations by X-rays in Wheat     

Swaminathan MS  Natarajan AT 《Science (New York, N.Y.)》1959,130(3386):1407-1409

A decrease in the yield of chromosomal aberrations in root meristems of wheat induced by four different doses of x-rays has been found to occur when the seeds are pretreated with ultraviolet radiation. However, in X(2) generation, the mutation rate for combined treatment is lower than for x-rays alone in lower dosages and higher than for x-rays alone in higher dosages.  相似文献   

Surface sites for engineering allosteric control in proteins     

Lee J  Natarajan M  Nashine VC  Socolich M  Vo T  Russ WP  Benkovic SJ  Ranganathan R 《Science (New York, N.Y.)》2008,322(5900):438-442

Statistical analyses of protein families reveal networks of coevolving amino acids that functionally link distantly positioned functional surfaces. Such linkages suggest a concept for engineering allosteric control into proteins: The intramolecular networks of two proteins could be joined across their surface sites such that the activity of one protein might control the activity of the other. We tested this idea by creating PAS-DHFR, a designed chimeric protein that connects a light-sensing signaling domain from a plant member of the Per/Arnt/Sim (PAS) family of proteins with Escherichia coli dihydrofolate reductase (DHFR). With no optimization, PAS-DHFR exhibited light-dependent catalytic activity that depended on the site of connection and on known signaling mechanisms in both proteins. PAS-DHFR serves as a proof of concept for engineering regulatory activities into proteins through interface design at conserved allosteric sites.  相似文献