A5009814340- Insect and Arachnid Ecology and Behavior
- Plant and animal studies
- Insect symbiosis and bacterial influences
- Neurobiology and Insect Physiology Research
- Orthoptera Research and Taxonomy
- Animal Behavior and Reproduction
- Insect and Pesticide Research
- Insect-Plant Interactions and Control
- Entomopathogenic Microorganisms in Pest Control
- Forest Insect Ecology and Management
- Invertebrate Immune Response Mechanisms
- Biological Control of Invasive Species
- Antimicrobial Peptides and Activities
- Insect behavior and control techniques
- Evolution and Genetic Dynamics
- Physiological and biochemical adaptations
- Vector-borne infectious diseases
- CRISPR and Genetic Engineering
- Fish biology, ecology, and behavior
- Ecology and Vegetation Dynamics Studies
- Evolutionary Game Theory and Cooperation
- Enzyme-mediated dye degradation
- Pharmacological Effects and Assays
- Insects and Parasite Interactions
- Nematode management and characterization studies
Institute of Agrobiological Sciences
2013-2023
National Agriculture and Food Research Organization
2016-2023
National Institute of Advanced Industrial Science and Technology
2016-2022
National Institute for Agro-Environmental Sciences
2011-2019
Tokyo University of Agriculture and Technology
2007-2013
In insects, antimicrobial humoral immunity is governed by two distinct gene cascades, IMD pathway mainly targeting Gram-negative bacteria and Toll preferentially Gram-positive bacteria, which are widely conserved among diverse metazoans. However, recent genomic studies uncovered that exceptionally absent in some hemipteran lineages like aphids assassin bugs. How the apparently incomplete immune pathways have evolved with functionality of interest. Here we report discovery that, stinkbug...
Abstract Microorganisms often live in symbiosis with their hosts, and some are considered mutualists, where all species involved benefit from the interaction. How free-living microorganisms have evolved to become mutualists is unclear. Here we report an experimental system which non-symbiotic Escherichia coli evolves into insect mutualist. The stinkbug Plautia stali typically associated its essential gut symbiont, Pantoea sp., colonizes a specialized symbiotic organ. When sterilized newborn...
Development of a reliable method for RNA interference (RNAi) by orally-delivered double-stranded (dsRNA) is potentially promising crop protection. Considering that RNAi efficiency considerably varies among different insect species, it important to seek the practical conditions under which dsRNA-mediated effectively works against each pest insect. Here we investigated in brown-winged green stinkbug Plautia stali , notorious infesting various fruits and plants. Microinjection dsRNA into P ....
Abstract Multicopper oxidase (MCO) genes comprise multigene families in bacteria, fungi, plants and animals. Two of MCO genes, MCO1 (laccase1) MCO2 (laccase2), are conserved among diverse insects relatively well-characterized, whereas additional whose biological functions have been poorly understood, also found some insects. Previous studies reported that participates gut immunity plays important roles cuticle sclerotization pigmentation In mosquitoes, was to be involved eggshell...
The lesser grain borer Rhyzopertha dominica (Coleoptera: Bostrichidae) is a stored-product pest beetle. Early histological studies dating back to 1930s have reported that R. and other bostrichid species possess pair of oval symbiotic organs, called the bacteriomes, in which cytoplasm densely populated by pleomorphic bacteria peculiar rosette-like shape. However, microbiological nature symbiont has remained elusive. Here we investigated bacterial using modern molecular, histological,...
The morphology, colouration and sexual behaviour of two gynandromorph adults the desert locust Schistocerca gregaria Forskål are described. In each these specimens, left half external genitalia has male characteristics right female characteristics. Yellowing epidermis occurs to different degrees in normal sexually mature adult S. under crowded conditions. Two hypotheses known explain this phenomenon. One suggests involvement a sex‐hormone/receptor complex, whereas other proposes...
Abstract The present study investigates the time of hatching migratory locust L ocusta migratoria using egg pods that are artificially buried in soil under outdoor conditions. Most eggs hatch mid‐morning, with a peak between 11.00 and 12.00 h, none before 09.00 or after 16.00 h. Furthermore, most complete within day, although some take 2 3 days, is interrupted by rain. There no large differences from M ay to S eptember. Laboratory experiments which exposed temperatures simulating conditions...
Abstract The effects of crowding and isolation on body color behavior were observed for the mid‐instar nymphs desert locust, Schistocerca gregaria . Some solitarious (isolation‐reared) that crowded 1 or 4 h during third instar developed black patterns at fourth instar, but most individuals remained unaffected. Black appeared in all day longer, even after days patterning some was not as intense gregarious (crowd‐reared) controls. Isolation caused to recede disappear last (fifth) nymphal it...
In stabled horses, behavioral responses to frustration are often observed, especially around feeding time. These a useful indicator of their welfare. this study, we investigated the association between and DRD4 gene polymorphisms in horses. Twenty one horses housed two stables were used. The observed for approximately 4 h over three or more days using focal-sampling instantaneous-sampling. Horses genotyped A-G substitution gene. effects (with without A allele gene), stables, interaction on...
Abstract Reflection of ultraviolet (UV) light by the wings female Eurasian cabbage butterfly, Pieris rapae , shows a large geographic variation. The European subspecies, P. reflect little UV light, while butterflies Asian crucivora may it strongly or at only intermediate levels. region where originated remains to be determined. Moreover, is not clear if females with that are ancestral vice versa . In present study, we aimed determine origin and pattern through mitochondrial DNA (mtDNA)...
A larval army caste is found in some parasitic wasps with polyembryonic or clonal proliferation, where many clone larvae emerge from a single egg. In contrast to non-parasitic eusocial Hymenoptera, sterile soldier that protect their reproductives are both females and males. Recently, the proportion of has been vary radically, depending on internal conditions host, such as multiparasitism by other parasites. However, male constant, irrespective host environment. It unknown if these traits...
Abstract A short‐winged morph was recently discovered in the migratory locust, L ocusta migratoria . It is different from normal, long‐winged not only forewing length but also hind femur length, displaying a dimorphism. To understand significance of this dimorphism, other morphological characters were compared between two morphs, and time differentiation wing‐pad investigated. Wing weights heavier than morph. This result showed that formed by failure wing expansion. No obvious morph‐specific...
Short-winged adults appeared in the 2nd generation of inbred colonies migratory locusts, Locusta migratoria, originating from Tsushima Island, Japan. Of 14 family lines, two produced several short-winged generation. These also had shorter hind femora than long-winged adults, indicating they may represent 'the morph' rather monsters with abnormally short wings. The wing morphs could be separated by ratio forewing length to head width. Crosses between revealed that morph was controlled a...
Abstract Antimicrobial peptides (AMPs) play crucial roles in the innate immunity of diverse organisms, which exhibit remarkable diversity size, structural property and antimicrobial spectrum. Here, we describe a new AMP, named Pentatomicin, from stinkbug Plautia stali (Hemiptera: Pentatomidae). Orthologous nucleotide sequences Pentatomicin were present stinkbugs beetles but not other insect groups. Notably, orthologous also detected horseshoe crab, cyanobacteria proteobacteria, suggesting...
Insects exclusively feeding on vertebrate blood are usually dependent symbiotic bacteria for provisioning of B vitamins. Among them, sucking lice prominent in that their as well organs exhibit striking diversity. Here we investigated the bacterial diversity associated with boar louse Haematopinus apri comparison hog suis . Amplicon sequencing analysis identified primary endosymbiont predominantly detected from all populations H. some minor secondary associates. Sequencing and phylogenetic...