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Dermatophagoides farinae is a major exogenous allergen. Its ability to tolerate adverse external temperatures makes it responsible for widespread occurrence of allergies. Heat shock protein (HSP), a recognized temperature stress response gene, but its role in D. farinae remained unclear. Here, we performed a comprehensive study. First, we found that 25 °C was the optimal temperature, and all mites died at 48 or -20 °C for 1 h (LT100). Thus, 41 °C (LT15), 43 °C (LT25), 45 °C (LT45), and -10 °C (LT25) were selected as stress temperatures to perform de novo RNA-seq. Then, 17 main genes of the 47 differentially expressed HSP, were detected by qRT-PCR. Temperature and time gradient versus expression magnitude histogram revealed that HSP70, HSP83-1, HSP83-2, and HSP16-1 showed heat stress response only at 41-43 °C, while HSC71 and HSF played a regulatory role under both heat and cold stress, particularly HSF, with strong intensity, long duration, and quick upregulation at recovery for 10-20 min. Finally, gene expression and D. farinae survival rates significantly decreased following RNAi. These findings indicated that HSPs conferred thermo-tolerance or cold-tolerance to D. farinae. In conclusion, this was the first meaningful exploration that confirmed HSP and HSF playing an important role in temperature resistance of D. farinae.
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http://dx.doi.org/10.1016/j.ijbiomac.2019.12.014 | DOI Listing |
Plant Cell Physiol
November 2024
Environmental Horticulture Department, University of Florida, PO Box 110670, Gainesville, FL 32611, USA.
NAC [NO APICAL MERISTEM (NAM), ARABIDOPSIS TRANSCRIPTION ACTIVATOR FACTOR 1/2 (ATAF1/2), and CUP-SHAPED COTYLEDON (CUC2)] transcription factors are key regulators of plant growth, development, and stress responses but were also crucial players during land plant adaptation and crop domestication. Using representative members of green algae, bryophytes, lycophytes, gymnosperms, and angiosperms, we expanded the evolutionary history of NAC transcription factors to unveil the relationships among members of this gene family. We found a massive increase in the number of NAC transcription factors from green algae to lycophytes and an even larger increase in flowering plants.
View Article and Find Full Text PDFJ Econ Entomol
December 2024
Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling, China.
Arbuscular mycorrhizal fungi may promote growth and stress resilience of plants, particularly under water-deficit conditions. However, interactions among mycorrhizal fungi, wheat plants, and aphids like the English grain aphid Sitobion avenae (Hemiptera: Aphididae) under water-deficit stress are still not well understood. Here, we examined the colonization of the fungus Claroideoglomus etunicatum (Glomerales: Claroideoglomeraceae) on wheat, and its effects on development and behavior of S.
View Article and Find Full Text PDFPlant Biol (Stuttg)
December 2024
Department of Silviculture and Forest Ecology of the Temperate Zones, University of Göttingen, Göttingen, Germany.
Temperate mixed forests are currently experiencing severe drought conditions and face increased risk of degradation. However, it remains unclear how critical tree physiological functions such as sap flow density (SFD) and tree water deficit (TWD, defined as reversible stem shrinkage when water is depleted), respond to extreme environmental conditions and how they interact under dry conditions. We monitored SFD and TWD of three co-occurring European tree species (Fagus sylvatica, Fraxinus excelsior and Acer pseudoplatanus) in dry conditions, using high temporal resolution sap flow, dendrometer, and environmental measurements.
View Article and Find Full Text PDFAm J Community Psychol
December 2024
CMHC-The Hispanic Clinic, Yale University, New Haven, Connecticut, USA.
Racist and xenophobic policies in the United States (e.g., family separations and lack of access to protected immigration statuses for undocumented immigrants) have historically excluded immigrants of color from accessing full civil rights, thus contributing to widening racial inequities in the US.
View Article and Find Full Text PDFProtein Sci
January 2025
Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, Illinois, USA.
Antimicrobial resistance is a significant cause of mortality globally due to infections, a trend that is expected to continue to rise. As existing treatments fail and new drug discovery slows, the urgency to develop novel antimicrobial therapeutics grows stronger. One promising strategy involves targeting bacterial systems exclusive to pathogens, such as the transcription regulator protein GabR.
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