Background: The conventional fertilization regime ignores the allometric characteristics of Quercus nuttallii seedlings, challenging them to meet nutritional needs at each growth stage. This study was conducted determine impact exponential on and nutrient status Q. container seedlings. Methods: Two regimes (average/exponential) were performed varied gradients (0, 300, 500, 700, 900 mg/seedling)...

The study was taken up with the objective of testing whether the endophytic organisms isolated from crops that are normally non-hosts to the bacterial wilt pathogen Ralstonia solanacearum possessed pathogen-antagonistic activity and to evaluate the selected isolates for the alleviation of wilt disease in the target tomato crop through horizontal movement of promising organisms. Sixteen endophyt...

HIGHLIGHTS Trichoderma inoculation increased the total biomass, seedling height, root length, area, diameter, number of tips, and growth potential seedlings. increases resistance bean plant to Rhizoctonia pathogen. Among improved isolates Trichoderma, ChBD13 ChBD15 showed better performance in terms growth.

Deployment of cultivars with genetic resistance is an effective approach to control the diseases of powdery mildew (PM) and yellow rust (YR). Chinese wheat cultivar XK0106 exhibits high levels of resistance to both diseases, while cultivar E07901 has partial, adult plant resistance (APR). The aim of this study was to map resistance loci derived from the two cultivars and analyze their effects a...

Resistance of a seedling to the herbicide 1,1'-ethylene-2,2'-dipyridylium bromide (diquat) can be used as a selective technique for photosynthesis mutants in Zea mays L. Diquat requires reduction by the light reaction in order to kill leaf cells and, therefore, nonphotosynthetic mutants survive. This technique was tested using known mutants and is applicable to larger samples of plants than pre...

Two kanamycin-resistant variants of Nicotiana tabacum were derived by culturing seedling leaf sections on a shoot-inducing medium containing kanamycin. The variants displayed a higher resistance to the structurally related antibiotic streptomycin than to kanamycin. The resistance phenotype was expressed when the tissue was cultured either as callus or as a differentiating tissue and was stably ...

screening is an important subject for breeding programs of resistant varieties of lentil. in recent years many developments were carried out in identification of resistant sources of germplasm of leguminous against soil-borne causes. fusarium oxysporum f.sp. lentis is one of the important disease of lentil in the world and iran. in this study, reactions of 30 lentil genotypes evaluated to find ...

Many cultivars of lettuce (Lactuca sativa L.), the most popular leafy vegetable, are susceptible to downy mildew disease caused by Bremia lactucae. Cultivars Iceberg and Grand Rapids that were released in the 18th and 19th centuries, respectively, have high levels of quantitative resistance to downy mildew. We developed a population of recombinant inbred lines (RILs) originating from a cross be...