Efficacy of entomopathogenic nematodes present in Việt Nam against brown marmorated stink bug () under laboratory conditions.

The brown marmorated stink bug (), a native of Asia, has become an invasive pest in North America and Europe. Given the severity of and the need for better and environmentally-friendly control methods for this pest, we evaluated the virulence four entomopathogenic nematode species (, and ) that occur naturally in soils in southern Việt Nam and compared them with that of a commercially available strain of . We report for the first time the pathogenicity of towards BMSB.

Characterisation of the genetic diversity of citrus viroid VII using amplicon sequencing.

Viroids occur in plants as swarms of sequence variants clustered around a dominant variant, leading to adoption of the term 'quasispecies' to describe the viroid population in an individual host. The composition of the quasispecies can potentially change according to the age of the infection, the position of the leaf or branch in the canopy, and the host species. The primary aim of this study was to investigate the quasispecies concept for citrus viroid VII (CVd-VII), a recently discovered member of the family Pospiviroidae.

: Artificial and Insect Pollination, Floral Guides and Volatiles.

The natural pollinator of the major species of commercially-grown vanilla, , is unknown, and the crop requires hand pollination to achieve significant levels of fruit set; however, the traditional technique (using a toothpick) is costly, as it requires skilled personnel. To overcome this problem, two native Australian bees, and , and the blowfly, , were trialled as pollinators. Three alternatives to the toothpick method were also trialled.

Adipokinetic hormone signaling mediates the enhanced fecundity of infected by ' Liberibacter asiaticus'.

serves as the primary vector for ' Liberibacter asiaticus (Las),' the bacterium associated with the severe Asian form of huanglongbing. Las-positive are more fecund than their Las-negative counterparts and require extra energy expenditure. Therefore, understanding the molecular mechanisms linking metabolism and reproduction is of particular importance.

Natural Infection of and with ' Liberibacter asiaticus' in Java.

The phloem-limited bacterium ' Liberibacter asiaticus' (Las) is the putative causal pathogen of the severe Asiatic form of huanglongbing (citrus greening) and is most commonly transmitted by the Asiatic citrus psyllid . Las severely affects many species and hybrids and has been recorded in the relative, orange jasmine, (L.) Jack (syn.

Genotypic Differences in Morphological, Physiological and Agronomic Traits in Wheat ( L.) in Response to Drought.

Drought is one of the main environmental factors affecting crop growth, and breeding drought-tolerant cultivars is one of the most economic and effective ways of increasing yields and ensuring sustainable agricultural production under drought stress. To facilitate the breeding of drought-tolerant wheat, this study was conducted to evaluate genotypic differences in the drought tolerance of 334 wheat genotypes collected from China and Australia with the aim of screening for drought-tolerant and -sensitive genotypes and to elucidate the corresponding physiological mechanisms. A hydroponic-air experiment (roots exposed to air for 7 h/d and continued for 6 d) showed significant genotypic differences in shoot and root dry weights among the genotypes.

Molecular and phylogenetic evidence of parallel expansion of anion channels in plants.

Aluminum-activated malate transporters (ALMTs) and slow anion channels (SLACs) are important in various physiological processes in plants, including stomatal regulation, nutrient uptake, and in response to abiotic stress such as aluminum toxicity. To understand their evolutionary history and functional divergence, we conducted phylogenetic and expression analyses of ALMTs and SLACs in green plants. Our findings from phylogenetic studies indicate that ALMTs and SLACs may have originated from green algae and red algae, respectively.

The effects of microbial fertilizers application on growth, yield and some biochemical changes in the leaves and seeds of guar (Cyamopsis tetragonoloba L.).

Guar (Cyamopsis tetragonoloba L.) is a summer legume that is becoming a crucial industrial crop because of its high gum and protein content. Thus far, the combined effects of arbuscular mycorrhizal fungi (AMF) and Bradyrhizobium on the yield and chemical composition of guar plants are not well studied.

Susceptibility of to Irradiation with UV-A and UV-B and the Applicability of the Bunsen-Roscoe Reciprocity Law.

Populations of decline with elevation and, in a study in Bhutan, were rarely found above 1200 m ASL. The impact of ultraviolet (UV) radiation, particularly UV-B, on immature stages of the psyllid was proposed as limiting factor. As no studies have been undertaken on the influences of UV radiation on the development of , we examined the effects of UV-A and UV-B on different stadia of the psyllid.

Discovery of Brassica Yellows Virus and Porcine Reproductive and Respiratory Syndrome Virus in and Changes in Virome Due to Infection with '. L. asiaticus'.

Detection of new viruses or new virus hosts is essential for the protection of economically important agroecosystems and human health. Increasingly, metatranscriptomic data are being used to facilitate this process. Such data were obtained from adult Asian citrus psyllids (ACP) ( Kuwayama) that fed solely on mandarin ( × L.

Luxury Zinc Supply Prevents the Depression of Grain Nitrogen Concentrations in Rice ( L.) Typically Induced by Elevated CO.

Rice ( L.) has inherently low concentrations of nitrogen (N) and zinc (Zn), and those concentrations are falling as the atmospheric concentration of carbon dioxide ([CO]) increases, threatening the quality of human diets. We investigated the effect of two levels of Zn supply (marginal and luxury), on Zn and N concentrations in whole grain of two indica rice cvv.

Funneliformis constrictum modulates polyamine metabolism to enhance tolerance of Zea mays L. to salinity.

The mechanisms underlie increased stress tolerance in plants of salinity stress in plants by arbuscular mycorrhizal fungi (AMF) are poorly understood, particularly the role of polyamine metabolism. The current study was conducted to investigate how inoculation with the AMF, Funneliformis constrictum, affects maize plant tolerance to salt stress. To this end, we investigated the changes in photosynthesis, redox status, primary metabolites (amino acids) and secondary metabolism (phenolic and polyamine metabolism).

Evolutionary Significance of NHX Family and NHX1 in Salinity Stress Adaptation in the Genus .

Rice (), a staple crop for a substantial part of the world's population, is highly sensitive to soil salinity; however, some wild relatives can survive in highly saline environments. Sodium/hydrogen antiporter (NHX) family members contribute to Na homeostasis in plants and play a major role in conferring salinity tolerance. In this study, we analyzed the evolution of NHX family members using phylogeny, conserved domains, tertiary structures, expression patterns, and physiology of cultivated and wild species to decipher the role of NHXs in salt tolerance in .

Proto Kranz-like leaf traits and cellular ionic regulation are associated with salinity tolerance in a halophytic wild rice.

Species of wild rice (Oryza spp.) possess a wide range of stress tolerance traits that can be potentially utilized in breeding climate-resilient cultivated rice cultivars (Oryza sativa) thereby aiding global food security. In this study, we conducted a greenhouse trial to evaluate the salinity tolerance of six wild rice species, one cultivated rice cultivar (IR64) and one landrace (Pokkali) using a range of electrophysiological, imaging, and whole-plant physiological techniques.

Site-specific, genotypic and temporal variation in photosynthesis and its related biochemistry in wheat ().

Photosynthesis in wheat (Triticum aestivum L.) pericarps may contribute appreciably to wheat grain yield. Consequently, we investigated the temporal variation of traits related to photosynthesis and sucrose metabolism in the pericarps and flag leaves of three wheat genotypes, Huandoy, Amurskaja 75 and Greece 25, which are reported to differ in expression of genes related to the C4 pathway in wheat grain.

Vitamin C Intervention for Critical COVID-19: A Pragmatic Review of the Current Level of Evidence.

Severe respiratory infections are characterized by elevated inflammation and generation of reactive oxygen species (ROS) which may lead to a decrease in antioxidants such as vitamin C and a higher requirement for the vitamin. Administration of intravenous vitamin C to patients with pneumonia and sepsis appears to decrease the severity of the disease and potentially improve survival rate. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection causes pneumonia, sepsis and acute respiratory distress syndrome (ARDS) in severe cases, and is referred to as coronavirus disease 2019 (COVID-19).

Development of a one-step RT-qPCR detection assay for the newly described citrus viroid VII.

An apscaviroid, tentatively named citrus viroid VII (CVd-VII), was recently discovered in citrus in Australia. A diagnostic assay using real-time reverse transcription polymerase chain reaction was developed and validated to detect the viroid in citrus plants. The assay showed a high level of sensitivity, reliably detecting 2000 plasmid copies per reaction, while down to 20 plasmid copies per reaction were occasionally detected.

A β-ketoacyl carrier protein reductase confers heat tolerance via the regulation of fatty acid biosynthesis and stress signaling in rice.

Heat stress is a major environmental threat affecting crop growth and productivity. However, the molecular mechanisms associated with plant responses to heat stress are poorly understood. Here, we identified a heat stress-sensitive mutant, hts1, in rice.

Zinc oxide nanoparticles: potential effects on soil properties, crop production, food processing, and food quality.

The use of zinc oxide nanoparticles (ZnO NPs) is expected to increase soil fertility, crop productivity, and food quality. However, the potential effects of ZnO NP utilization should be deeply understood. This review highlights the behavior of ZnO NPs in soil and their interactions with the soil components.