knowledge of environmental and ecological factors as well as growth and development pattern of fruit trees is an important task in orchard management and fruit industry. in addition, determination of growth pattern is an important aspect in the orchard management system. in this research, the total photosynthesis rate and growth pattern was measured in nine asian pear cultivars. experiment was ...

tetrahydrobenzo[b]pyran derivatives 1 were utilized for the synthesis of several new pyrano[2,3-d]pyrimidine derivatives 2. compound 2 was obtained in the presence of ac2o/h2so4 (as a catalyst) and was confirmed by spectroscopic data such as ir, 1h nmr and 13c nmr. ab initio calculation was carried out to study geometric optimization, thermodynamic parameters, aromaticity and dynamic process of...

in order to study the effect of different levels of nitrogen and sulfur fertilizers on yield, yield components, content of some elements, qualitative and quantitative traits of spring safflower (serin cv.) an experiment was conducted at agriculture and natural resource research station of ardabil in 2008. this experiment was carried out in factorial experiment in completely randomized block des...

to evaluate the effect of salinity on some quantitative and qualitative characteristics of spring rapeseed cultivars, an experiment was conducted in the greenhouse conditions at yasoujuniversityas a factorial with three replications. four salinity levels (1.92 (as control), 9.87, 19.6 and 21.94 dsm-1 (nacl and cacl2 with ratio 20 to 1 in hoagland solution)) as a first factor and eight cultivars...

human resource productivity is an important subject in theory and practice, so increase of productivity is the first priority in most of organizations. the main purpose of most organizations is creating value for their shareholders. so it is necessary to understand effect of human resource productivity in achieving this goal and find the obstacles. the purpose of this research is examining the ...

effects of different paclobutrazol concentrations (0, 250, 350 and 450 mgl-1) and plantlet density (80, 100 and 120 plantlet/m2) on minituber production per plantlet in potato cultivar ‘sante’ were investigated in a factorial experiment based upon a randomized complete block design of 4 replications. paclobutrazol (cultar with 250 g/l of active ingredient) was used as foliar application at earl...

trehalose is an important disaccharide signal metabolite in plants which is involved in various aspects of plant function such as response to stress, photosynthesis and carbon allocation and partitioning. a mutant of arabidopsis lacking trehalose-6-phosphate synthase activity (tps1) accumulates ascorbate. exogenous ascorbate application ameliorates trehalose induced growth inhibition of wild ty...

in this research, the ability of bacillus strains in suppression of mycelial growth and conidial germination of b. cinerea against botrytis fruit rot of strawberry were evaluated in three cultivars of strawberry including quineliza, paros and kurdistan. results indicated that among 32 strains of bacillus, ten strains showed strong inhibitory effects against b. cinerea using the plate assay and ...

calla lily, an ornamental bulbous plant from araceae family (consisting of seven species) is characterized by spadix inflorescence and utilized for cut flower as well as for pot plant. a greenhouse study was conducted in university college of agriculture and nature resources of tehran university, to evaluate the quantitative and qualitative characteristics of pot plant of calla lily. the type o...

introduction climate change happens due to abnormal changes of climate within the earth’s atmosphere and their consequences. one of the most significant effects of climate change is the irreversible damage to some floral species and forest ecosystems. tree species reflect the impact of climate changes on their ring width. generally, tree rings vary in size each year depending upon the environme...