نتایج جستجو برای: therioaphis trifolii
تعداد نتایج: 718 فیلتر نتایج به سال:
E. pisi was thought to be the only causal agent of powdery mildew in peas, with three genes, er1, er2 and Er3, conferring resistance this pathogen. Recently, trifolii has also been found cause disease peas different countries, but its relevance pea worldwide is unknown. The objective study develop a method identify quantify use it analyze relative prevalence fields Spain Tunisia. We wanted disc...
Rhizobium leguminosarum bv. trifolii SRDI565 (syn. N8-J) is an aerobic, motile, Gram-negative, non-spore-forming rod. SRDI565 was isolated from a nodule recovered from the roots of the annual clover Trifolium subterraneum subsp. subterraneum grown in the greenhouse and inoculated with soil collected from New South Wales, Australia. SRDI565 has a broad host range for nodulation within the clover...
Aims: During a disease survey conducted in 2019, typical symptoms including yellowing of the leaves, stunting, shortening internodes, proliferation auxiliary shoots (witches'-broom), bunchy appearance growth at ends stems (rosetting), virescence flowers or sterility, phyllody, small and deformed leaves fasciation were observed on suspected cucurbit plants growing Hatay province. Therefore, this...
Article Information Brinjal is an important vegetable crop grown worldwide. A field survey conducted during 2012 in Kerala state of South India, the little leaf disease affected brinjal plant was observed in one of the home gardens located at Nemmara (Palakkad district). The diseased and healthy samples were collected; genomic DNA was isolated and 16SrRNA gene amplified by performing nested PCR...
In the fast-growing Rhizobium species, repeated DNA sequences, which include the promoter region of the nif HDK operon have been described. These repeated sequences are promoters which specifically activate transcription in the endosymbiotic state. Hybridization analysis of these sequences from R. trifolii has revealed that they may be involved in the species-specific activation of the various ...
The adhesion of rhizobia to surfaces of clover roots was examined by an indirect plate-counting assay and phase-contrast microscopy. The number of Rhizobium trifolii cells attached to clover root segments increased in approximately linear fashion during the first hour of incubation, but did not change appreciably thereafter. The addition of 30 mM-2-deoxy-D-glucose, which effectively inhibits bi...
Carboxymethyl cellulase and polygalacturonase activities were evaluated in wild-type strains from different taxonomic groups of rhizobia which nodulate a specific range of legume hosts that do not normally overlap (R. meliloti, R. loti, R. leguminosarum biovar trifolii, R. leguminosarum biovar phaseoli, R. leguminosarum biovar viceae, and Bradyrhizobium japonicum). To detect these enzymatic act...
Correlation of Edaphic Factors with Plant-parasitic Nematode Population Densities in a Forage Field.
Two hundred soil samples from the A(p) horizon of a reed canarygrass field overlaying several different but related soils in northern Minnesota were analyzed for plant-parasitic nematodes and 22 edaphic factors. Pratylenchus penetrans was the predominant nematode taxon. Others were Aglenchus agricola, Tylenchorhynchus spp., Heterodera trifolii, Paratylenchus spp., Tylenchus maius, and Criconeme...
Symptoms similar to those produced by the phytoplasma disease "Big bud" were observed on tomatoes (Solanum lycopersicum L.) grown in field Mosul city, Iraq. Diseased plants characterized twisting, corrugated, yellowing or reddening of leaves. The sepals flowers acquired hypertrophied form, fused together and created a bell-shaped sterile bud (phyllody) green anthocyanin color. stems lignified, ...
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