Effect of laboratory‐isolated Lactobacillus plantarum LGFCP4 from gastrointestinal tract of guinea fowl on growth performance,carcass traits,intestinal histomorphometry and gastrointestinal microflora population in broiler chicken          下载免费PDF全文

P. G. Vineetha  S. Tomar  V. K. Saxena  M. Kapgate  A. Suvarna  K. Adil 《Journal of animal physiology and animal nutrition》2017,101(5):e362-e370

The study aimed to investigate the effect of feed supplements, viz Lactobacillus plantarum LGFCP4 (laboratory isolate from GIT of Guinea fowl), Lactobacillus acidophilus (NCDC, Karnal) and in‐feed antibiotic bacitracin methylene disalicylate (BMD) on growth performance, FCR, carcass traits and immune organs weight, intestinal histomorphometry and gastrointestinal microflora population in broiler chickens. In a completely randomized design, CARIBRO‐Dhanraja broiler chicks (n = 160) were used with four treatment groups. During the entire experimental duration of 35 days, treatment groups were provided with different dietary treatments (T1 – basal diet (negative control), T2 – antibiotic growth promoter BMD 20 g/100 kg feed (positive control), T3 – 1 × 10⁸ cfu of L. acidophilus/gm‐fermented feed +MOS 1 g/kg feed and T4 – 1 × 10⁸ cfu of laboratory‐isolated L. plantarum LGFCP4/gm‐fermented feed+ MOS 1 g/kg feed. After 35 days of experimental period, no significant results have been observed in different growth performance traits among treatment groups. Cut‐up parts and edible organs' weight remained unaffected by dietary supplementation, whereas weight of immune organs were significantly higher (p < 0.05) in L. plantarum LGFCP4‐supplemented group. At the end of feeding trial, significantly (p < 0.05) lower E. coli count was observed in crop of T4 birds, while in ileum, T2 and T3 showed lower count. In caeca, T2 group showed lowest E. coli count. Salmonella count in crop and ileum was significantly (p < 0.05) low in T3 and T4, while in caeca, T2 group showed lowest count. In terms of histomorphometry, duodenal villous height (VH), crypt depth (CD) and VH:CD ratio were higher for T3 and T4 and lowest values were obtained for T2 group. The results of the study showed that L. plantarum LGFCP4 isolated from GIT of guinea fowl can effectively replace in‐feed antibiotic growth promoters in broiler diets by altering intestinal villi morphology and improving the gut health by reducing the pathogenic microbial load.  相似文献   

Removal of Dyes Using Graphene-Based Composites: a Review     

Ishani Khurana  Amit Saxena  Bharti  Jitender M. Khurana  Pramod Kumar Rai 《Water, air, and soil pollution》2017,228(5):180

Water contamination has reached an alarming state due to industrialization and urbanization and has become a worldwide issue. Dyes contaminate water and are addressed extensively by researchers. Various technologies and materials have been developed for the treatment of contaminated water. Among them, adsorption has attracted great attention due to its ease and cost-effective nature. In recent years, graphene-based composites have shown great potential for the removal of contaminants from water. The literature reveals the usefulness of composites of graphene with metal oxides, carbon derivatives, metal hybrids and polymers for the removal of organic dyes from contaminated water. In this review, efforts have been made to compile the studies on the removal of cationic and anionic dyes from water using graphene-based composites.  相似文献   

An overview of male-sterility systems in pigeonpea [<Emphasis Type="Italic">Cajanus cajan</Emphasis> (L.) Millsp.]     

V. A. Dalvi  K. B. Saxena  R. H. Luo  Y. R. Li 《Euphytica》2010,171(3):397-407

For commercial development of hybrids the four pre-requisites are; availability of perfect male-sterility system, efficient mass pollen transfer mechanism, hybrid vigor, and the large scale seed production of hybrids for commercialization. The type of male-sterility governs the acceptance of hybrids by farmers. Genetic male-sterility (GMS) system was not accepted by farmers due to the economics of large scale seed production. The major drawback was rouging of fertile counterpart from the female plot, which was time consuming and labor intensive. Cytoplasmic-genic male-sterility (CMS) system usually was a better option for large scale seed production. Hybrid vigor has been utilized in some cereal and vegetable crops. Pigeonpea (Cajanus cajan) displays considerable natural out-crossing and now CMS lines are available with different cytoplasmic backgrounds. This mini-review reports the research on development of CMS lines and CMS-based hybrids in pigeonpea.  相似文献   

酶可促进家禽生长、改善饲料利用率     

Dr H.C.Saxena  沈权  于古月 《国外畜牧学(猪与禽)》2010,30(1):15-17

酶在动物饲料中的应用已有多年的历史,并已证明能帮助家禽取得良好的生产性能。本文作者将讨论酶在家禽营养中的相关事实和数值,以及其被添加入玉米的哪些替代饲料中是有效的。  相似文献   

木豆胞质雄性不育系柱头活力研究   总被引：2，自引：1，他引：1  

Dalvi V.A.  罗高玲  罗瑞鸿  李杨瑞  Saxena K.B. 《西南农业学报》2010,23(2)

在中国南部地区南宁市(位于北纬22°49′、东经107°45′)大田生产条件下对2个木豆胞质雄性不育系ICPA 2039和ICPA 2043花期柱头活力进行研究,发现柱头活力始于开花前2d并维持至开花后4d,活力峰值出现在开花当日;人工授粉成荚率ICPA 2039和ICPA 2043分别为84.0 %和82.0 %;柱头活力期可通过花冠/花萼长度比来判定,ICPA 2039和ICPA 2043分别为2.75±0.075和2.60±0.283.柱头活力周期越长,获得虫媒授粉的异交机会越多,因此柱头活力周期是杂交育种成功率的一个重要技术参数,长的活力周期也是种子生产获得高产的保证.  相似文献   

Suppression of Reproduction in Poekilocerus pictus (F.) using Penfluron and Diflubenzuron     

S. C. Saxena  Girish Mathur 《国际虫害防治杂志》2013,59(4):492-494

Abstract

Penfluron and diflubenzuron, both chitin synthesis inhibitors known to be highly effective against nymphs of Poekilocerus pictus (F.), were tested against the adult for their possible effects upon reproduction. These compounds were found to have the maximum effect, when no eggs were laid, if both sexes were treated. The eggs of treated males × untreated females did not hatch and those of treated females × untreated males gave rise to nymphs which died before reaching maturity.  相似文献   

A PCR-based assessment of genetic diversity,and parentage analysis among commercial mango cultivars and hybrids     

Anuj P. Srivastava  Ramesh Chandra  Sangeeta Saxena  Shailendra Rajan  Shirish A. Ranade 《The Journal of Horticultural Science and Biotechnology》2013,88(6):951-959

Summary

Three different PCR methods [Random Amplified Polymorphic DNA (RAPD), Inter-Simple Sequence Repeats (ISSR), and Directed Amplification of Minisatellite DNA (DAMD)] were used to analyse genetic diversity and parentage among 20 mango cultivars, including 18 landraces and two hybrids (‘Amrapali’ and ‘Mallika’). These hybrids together with a third hybrid (‘Ratna’), and an out-group species (Mangifera sylvatica) were also analysed for parentage. Fifteen, seven and four primers were used to amplify a total of 158, 69 and 59 distinct DNA fragments by RAPD, ISSR and DAMD, respectively. Of these, approx. 85%, 64% and 90% were polymorphic, respectively. Genetic distances between pairs of mango cultivars were measured separately by each method and depicted graphically as a Neighbor Joining (NJ) tree. The three methods revealed different groupings of cultivars and hybrids. A NJ tree based on the cumulative data from all methods correlated well with the parentage of the mango hybrids, and the grouping of cultivars on a regional basis. Genetic markers likely to be associated with important agronomic traits were identified by further analysing the hybrids, with their respective parents, using all three methods. On the basis of the highest number of polymorphic bands observed (90%), DAMD was judged to be the best method with which to analyse mango germplasm.  相似文献   

The alternative breeding approaches for improving yield gains and stress response in pigeonpea (Cajanus cajan)     

Kulbhushan Saxena  Abhishek Bohra  Arbind K. Choudhary  Rafat Sultana  Mamta Sharma  Lekha T. Pazhamala  Rachit K. Saxena 《Plant Breeding》2021,140(1):74-86

Pigeonpea is an important food legume crop of semi‐arid tropical regions. Plateauing of pigeonpea yield has been worrying breeders for the past 6–7 decades. Serious breeding efforts made during this period resulted in various high‐yielding and disease resistant cultivars. However, the gains in pigeonpea productivity have been modest. The authors, while reviewing this situation, conclude that long generation turnover, complexity of biological traits, low selection response and overreliance upon pedigree breeding present the key bottlenecks for this situation. In this paper, some alternative breeding approaches and technologies are suggested for the genetic enhancement of yield stability and stress response of pigeonpea.  相似文献   

Oxidative Stress and Antioxidants in Wheat Genotypes: Possible Mechanism of Water Stress Tolerance   总被引：8，自引：0，他引：8  

R. K. Sairam  D. C. Saxena 《Journal of Agronomy and Crop Science》2000,184(1)

The role of plant antioxidant systems in water stress tolerance was studied in three contrasting wheat genotypes. Water stress imposed at different stages after anthesis resulted in an increase in lipid peroxidation and a decrease in membrane stability and chlorophyll and carotenoid contents. The antioxidant enzymes ascorbate peroxidase, glutathione reductase and non-specific peroxidase also increased significantly under water stress. Genotype PBW 175, which had highest ascorbate peroxidase, glutathione reductase and peroxidase activity, had the lowest lipid peroxidation (malondialdehyde content) and highest membrane stability and contents of chlorophyll and carotenoids under water stress, while the susceptible genotype WH 542 exhibited the lowest antioxidant enzyme activity, membrane stability and contents of chlorophyll and carotenoids and the highest lipid peroxidation. Genotype HD 2402 showed intermediate behaviour. It seems that drought tolerance of PBW 175, as represented by higher membrane stability and chlorophyll and carotenoid contents and lower lipid peroxidation, is related to its higher antioxidant enzyme activity.  相似文献   

Ultrastructural changes in isolated spinach chloroplasts and in Chlorella pyrenoidosa chick (Emerson strain) treated with dichlone     

Faye D. Schwelitz  H.C. Sikka  J. Saxena  G. Zweig 《Pesticide biochemistry and physiology》1974,4(4):379-385

Isolated spinach chloroplasts and Chlorella cells treated with dichlone (2,3-dichloro-1,4-naphthoquinone) exhibited morphological changes which appeared to be consistent with an alteration of protein elements in the cell. The stroma of dichlone-treated chloroplasts appeared less structured and more homogeneous than that of the control. The cell membrane in dichlone-treated Chlorella cells shrank from the cell wall and exhibited much invagination while the outer membrane of Chlorella chloroplasts appeared wavy. The changes in the cytoplasm of treated Chlorella cells closely reflected those noted in the chloroplast stroma.  相似文献