Publications by authors named "Fei Ying Yang"
Article Synopsis
- The paper investigates a fractional diffusive susceptible-infected-susceptible (SIS) model that analyzes how diseases spread over time and space using a mass action infection approach.
- It examines the stability and existence of both disease-free and endemic states, and explores how different rates of movement (diffusion) affect the disease dynamics.
- Interestingly, the research finds that instead of eliminating the disease by controlling infected individuals, limiting the movement of susceptible people leads to the disease vanishing altogether.
The diamondback moth, , is an important agricultural pest that severely damages cruciferous vegetables. Although previously considered a threat only to species, has been observed to feed on noncruciferous vegetables. Here, we established a population of on the pea (PxP population).
View Article and Find Full Text PDFEvolutionary and ecological forces are important factors that shape gut microbial profiles in hosts, which can help insects adapt to different environments through modulating their metabolites. However, little is known about how gut microbes and metabolites are altered when lepidopteran pest species switch hosts. In the present study, using 16S-rDNA sequencing and mass spectrometry-based metabolomics, we analyzed the gut microbiota and metabolites of three populations of : one feeding on radish (PxR) and two feeding on peas (PxP; with PxP-1 and PxP-17 being the first and 17th generations after host shift from radish to peas, respectively).
View Article and Find Full Text PDFMass spectrometry imaging: An emerging technology for the analysis of metabolites in insects.
Arch Insect Biochem Physiol
April 2020
Mass spectrometry imaging (MSI) can visualize the composition, abundance, and spatial distribution of molecules in tissues or cells, which has been widely used in the research of life science. Insects, especially the agricultural pests, have received a great deal of interests from the scientists in biodiversity and food security. This review introduces the major characteristics of MSI, summarizes its application to the investigation of insect endogenous metabolites, exogenous metabolites, and the spatiotemporal changes of metabolites between insects and plants, and discusses its shortfalls and perspectives.
View Article and Find Full Text PDFPlant microRNAs (miRNAs) have recently been reported to be involved in the cross-kingdom regulation of specific cellular and physiological processes in animals. However, little of this phenomenon is known for the communication between host plant and insect herbivore. In this study, the plant-derived miRNAs in the hemolymph of a cruciferous specialist were identified by small RNAs sequencing.
View Article and Find Full Text PDFArticle Synopsis
- The study focuses on red-fleshed papaya to understand how different carotenoids accumulate in its peel and flesh as the fruit ripens, noting that peel color changes from green to yellow and flesh from white to red.
- Major carotenoids found include lutein and β-carotene in the peel, while lycopene dominates in the flesh, which contributes to the flesh’s orange-red color; carotenoid biosynthesis involves 13 key genes that were analyzed for their expression patterns.
- The findings reveal that the carotenoid biosynthetic pathways differ between the yellow peel and red flesh, with the flesh only having a β-branch pathway, while the peel displays multiple pathways.
Article Synopsis
- Papaya is a climacteric fruit, meaning it ripens in response to ethylene; applying exogenous ethylene speeds up ripening, while 1-methylcyclopropene (1-MCP) slows it down. Researchers sequenced the transcriptomes of ETH-treated, 1-MCP-treated, and control papaya fruits to study the ripening process.* -
- The study identified 18,648 genes for 1-MCP, 19,093 for control, and 15,321 for ETH treatments, indicating that ethylene might suppress some gene expressions. From this analysis, 53 genes related to fruit ripening processes were recognized, spanning areas like cell wall dynamics and chlorophyll metabolism.*