Paenibacillus polymyxa J2-4 induces cucumber to enrich rhizospheric Pseudomonas and contributes to Meloidogyne incognita management under field conditions.

Background: Root knot nematodes (RKNs) pose a great threat to agricultural production worldwide. The bacterial nematocides have received increasing attention due to their safe and efficient control against RKNs. Here, we investigated the biocontrol efficacy of Paenibacillus polymyxa J2-4 against Meloidogyne incognita in the field and analyzed the rhizosphere microbiome of cucumber under nematode infection after application of the J2-4 strain.

Volatile organic compounds produced by Paenibacillus polymyxa J2-4 exhibit toxic activity against Meloidogyne incognita.

Background: Root knot nematodes cause great damage to crops worldwide. Due to the negative effects of the application of fumigant and old chemical nematicides, biological nematicides have drawn increasing attention in recent years. Here we tested the fumigant activity of the volatile organic compounds (VOCs) blends emitted from Paenibacillus polymyxa and pure commercial VOCs against M.

Biocontrol Efficacy and Induced Resistance of J2-4 Against Infection in Cucumber.

is one of the most destructive agricultural pathogens around the world, resulting in severe damage to yield and quality in agricultural production. Biological control promises to be a great potential alternative to chemical agents against J2-4, isolated from ginger plants injured by , has shown excellent biocontrol efficacy against in cucumber. In vitro experiments with the strain J2-4 resulted in a correct mortality rate of 88.

Diagnosis and Characterization of Isolated from in China.

The potato rot nematode () is one of the most destructive pests in the production of tuber crops, resulting in severely decreased yields and inferior product quality. In 2021, a great number of nematodes were detected in the roots of , a weed that is harmful to crop growth, in Qingdao, Shandong Province, China. The present study was undertaken to characterize and identify the nematodes isolated from through morphological identification and molecular approaches.

Soybean root transcriptome profiling reveals a nonhost resistant response during Heterodera glycines infection.

Heterodera glycines (soybean cyst nematode, SCN) is one of the most devastating pathogens of soybean worldwide. The compatible and in compatible interactions between soybean and SCN have well documented. Nevertheless, the molecular mechanism of a nonhost resistant response in soybean against SCN infection remains obscure.

Overexpression of Increases the Accumulation of Castasterone and Confers Enhanced Black Shank Tolerance in Tobacco Through Modulation of the Antioxidant Enzymes' Activities.

Black shank caused by is one of the most devastating diseases in tobacco production. In this study, we characterized a novel cytochromic resistance gene, , from spinach, which was upregulated in response to infection. Overexpression of in tobacco resulted in remarkable resistance to pathogen inoculation, with diverse resistance levels in different transgenic lines.

Overexpression of , a Spinach Cytochrome p450 Gene in Transgenic Tobacco Enhances Root Development and Drought Stress Tolerance.

Brassinosteroids (BRs) play an essential role in plant growth, development, and responses to diverse abiotic stresses. However, previous studies mainly analyzed how exogenous BRs influenced plant physiological reactions to drought stress, therefore, genetic evidences for the endogenous BRs-mediated regulation of plant responses still remain elusive. In this study, a key BRs biosynthetic gene, was cloned from , which has a complete open reading frame of 1,392 bp encoding a 464 amino acid peptide and shares high sequence similarities with CYP85A1 from other plants.

The cumulative damage index method: a new method for evaluating the effectiveness of control measures for Plutella xylostella (Lepidoptera: Plutellidae).

Background: All previously and currently used methods for effectiveness evaluation of control measures for the diamondback moth (DBM) do not simultaneously take the actual damage and population size into consideration. Here, we propose a new method, the cumulative damage index method, in which the number of larvae and their amount of food consumption are simultaneously included in the calculation of the theoretical cumulative damage index (T) and actual cumulative damage index (A). Evaluation was based on the reduced degree of damage calculated according to indexes T and A.