Evaluation of wheat chromosome translocation lines for high temperature stress tolerance at grain filling stage

Citation: Pradhan GP, Prasad PVV (2015) Evaluation of Wheat Chromosome Translocation Lines for High Temperature Stress Tolerance at Grain Filling Stage. PLoS ONE 10(2): e0116620. doi:10.1371/journal.pone.0116620High temperature (HT, heat) stress is detrimental to wheat (Triticum aestivum L.) production. Wild relatives of bread wheat may offer sources of HT stress tolerance genes because they grow in stressed habitats. Wheat chromosome translocation lines, produced by introgressing small segments of chromosome from wild relatives to bread wheat, were evaluated for tolerance to HT stress during the grain filling stage. Sixteen translocation lines and four wheat cultivars were grown at optimum temperature (OT) of 22/14°C (day/night). Ten days after anthesis, half of the plants were exposed to HT stress of 34/26°C for 16 d, and other half remained at OT. Results showed that HT stress decreased grain yield by 43% compared with OT. Decrease in individual grain weight (by 44%) was the main reason for yield decline at HT. High temperature stress had adverse effects on leaf chlorophyll content and Fv/Fm; and a significant decrease in Fv/Fm was associated with a decline in individual grain weight. Based on the heat response (heat susceptibility indices, HSIs) of physiological and yield traits to each other and to yield HSI, TA5594, TA5617, and TA5088 were highly tolerant and TA5637 and TA5640 were highly susceptible to HT stress. Our results suggest that change in Fv/Fm is a highly useful trait in screening genotypes for HT stress tolerance. This study showed that there is genetic variability among wheat chromosome translocation lines for HT stress tolerance at the grain filling stage and we suggest further screening of a larger set of translocation lines

Elasticity-mediated self-organization and colloidal interactions of solid spheres with tangential anchoring in a nematic liquid crystal

Using laser tweezers and fluorescence confocal polarizing microscopy, we study colloidal interactions of solid microspheres in the nematic bulk caused by elastic distortions around the particles with strong tangential surface anchoring. The particles aggregate into chains directed at about 30 degrees to the far field director and, at higher concentrations, form complex kinetically trapped structures. We characterize the distance and angular dependencies of the colloidal interaction forces.Comment: 6 pages, 5 figure

Reliabilty and Cost Benefit Analysis of DG Integrated Distribution System

Integration of Distributed generation (DG) results in a number of advantages ranging from reduction in losses to delayed generation and transmission capacities. In this paper the impact of DGs on reliability is considered and their effect on reliability in terms of number and location is evaluated. The integration of DG changes configuration of the radial system. This point is considered for evaluating the load point indices. The cost effectiveness of number of DGs is evaluated for the determining the returns on the DG investment cost. The above analysis is carried out on a RBTS Bus 2 system. The reliability indices are calculated using FMEA technique

Economic Empowerment of Women through Information Technology: A Case Study from an Indian State

It is universally accepted that Information Communication Technologies (ICT) offer immense opportunities for the comprehensive social and economic development of the people all over the world. Without its adoption, there is little chance for countries or regions to develop. However, the potential of ICT as a technology for promoting micro-enterprises by poor women is still unused in many countries. This article discusses the success story of a government project for poverty eradication using ICT. The case study on ‘ICT micro-enterprises by self-help group of poor women’ describes the story of a self-help group, which uses potential of ICT for poverty eradication through economic empowerment of poor women. It illustrates how ICT can effectively be used as a technology for micro-enterprises, which are promoted by poor women under self-employment scheme. The article also deals with SWOT analysis that identifies the strengths, weaknesses, opportunities and threats for ICT based micro-enterprises. The article proves that if a country has the necessary enabling environment permitting the establishment of ICT micro-enterprises, poor women can promote such business for their economic empowerment

Effect of feed supplemented exogenous bacteria, Lactobacillus sporogenes on the growth and body composition of Cirrhinus mrigala fingerlings

Probiotics are known to improve the growth rate of aquatic organisms. Little experimentation has focused on supplementation of live colony forming units ofL.sporogenes in Cirrhinus mrigala to access the growth performance. A feeding trial was conducted for 50 days to study the effects of Lactobacillus sporogenes on growth and body composition of Cirrhinus mrigala (Hamilton-Buchnan, 1822) fingerlings. Fishes were fed with five experimental feeds containing 3.31x105 colony forming units (CFU)/100g-1 of L. sporogenes in diet D2 , 1.65×106 CFU/ 100g-1 in diet D3, 3.31×106 CFU/100g-1 in diet D4 and 4.96×106 CFU/100g-1 in diet D5. Control diet D1 was kept devoid of L. sporogenes. The diets prepared were containing 0.0% (D1), 0.1% (D2), 0.5% (D3), 1.0% (D4) and 1.5%(D5) of live cells of L. sporogenes CFU/100gm-1 of feed. Increasing trend of weight gain, specific growth rate (SGR), protein efficiency ratio (PER) improved food conversion ratio (FCR) was observed in treatments fed with probiotic added feeds than control feed. Best growth performance was found in the treatment fed with D4 of L. sporogenes containing 3.31×106 CFU 100g-1 of feed. At increased level 4.96×106 CFU 100g-1 of L. sporogenes inclusion the growth performance was dropped. Tissue protein content was also observed to be higher in animals fed with D4 feed. The lipid content was significantly (P<0.05) higher in fingerlings fed with control feed (D1). In short, L. sporogenes addition to a level of 3.31×106 CFU 100g-1 in feed improved growth performance of C. mrigala fingerlings. Therefore, it is evident that 3.31×106 CFU 100g-1 of feed of L. sporogenes can be considered as suitable concentration for attaining good growth in C.mrigala fingerlings