Cotton (Gossypium hirsutum L. cv. Deltapine 50) seedlings grown under light-dark cycles of 12:12 h at 33 degrees C showed rhythmic changes in their resistance to heat shock of 53 degrees C for 40 min. The resistance was maximal at the middle of the light period and declined toward the end of the light period. One more peak of resistance developed in the middle of the dark period and declined toward the end of the dark period. Rhythmic changes in heat resistance persisted under continuous light for 3 cycles, indicating a circadian control. Under continuous light only one phase of resistance developed, lasting from the middle of the subjective night to the middle of the subjective day. The major heat shock proteins (HSPs) synthesized upon 30-min exposure to 40 degrees C, 49 degrees C or 53 degrees C were of 115, 89, 73, and 19 kDa. Their rate of synthesis depended on the inducing temperature, on previous exposure to high temperature and on the time in the light-dark cycle. The time dependency of the induction of certain HSPs persisted under continuous light, indicating a circadian control. No positive correlations was found between the rhythmic changes in heat resistance and the rhythmic changes in the synthesis of any HSP.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Forty years of seasonal affective disorder.
Psychiatr Pol
October 2024
Uniwersytet Medyczny w Poznaniu.
In 2024, we observe the fortieth anniversary of the publication, where, for the first time, the term of Seasonal Affective Disorder (SAD) was used. Presently, SAD is regarded as a special category of mood disorder. In the American Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-V), the seasonality makes a specifier, "with seasonal pattern", both for recurrent depression or Major Depressive Disorder (MDD), and for Bipolar Disorder (BD).
View Article and Find Full Text PDFPTR-ToF-MS VOC Profiling of Raw and Cooked Gilthead Sea Bream Fillet (): Effect of Rearing System, Season, and Geographical Origin.
Molecules
January 2025
Research and Innovation Centre, Fondazione Edmund Mach, 38098 San Michele all'Adige, TN, Italy.
This study explores the impact of geographical origin, harvest time, and cooking on the volatile organic compound (VOC) profiles of wild and reared seabream from the Adriatic and Tyrrhenian Seas. A Proton Transfer Reaction-Time of Flight-Mass Spectrometry (PTR-ToF-MS) allowed for VOC profiling with high sensitivity and high throughput. A total of 227 mass peaks were identified.
View Article and Find Full Text PDFFruiting phenology affects the direction of vertical seed dispersal by mammals and birds across mountain ranges.
Oecologia
January 2025
Tohoku Research Center, Forestry and Forest Products Research Institute, Morioka, Iwate, Japan.
Vertical seed dispersal towards higher or lower altitudes is an important process for plants' adaptation to climate change. Although many plants depend on animals for seed dispersal, studies on vertical seed dispersal by animals, determined by complex animal behaviours, are scarce. Previous studies hypothesised that animals inhabiting temperate regions disperse seeds uphill in spring/summer and downhill in autumn/winter due to their seasonal movement following the altitudinal gradients in food phenology.
View Article and Find Full Text PDFMulti-season survey of ixodid tick species collected from domestic dogs in Chad, Africa.
Vet Parasitol Reg Stud Reports
January 2025
Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, Wildlife Health Building, 589 D.W. Brooks Dr., University of Georgia, Athens, GA 30602, USA; Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA 30602, USA; Center for Ecology of Infectious Diseases, University of Georgia, Athens, GA 30602, USA. Electronic address:
Ticks are medically important vectors of pathogens, many of which are zoonotic or impact domestic animal and/or wildlife health. Climate change, landuse modifications, and increasing interactions between domestic animals, wildlife, and humans have resulted in changes in tick-host dynamics and the emergence of novel pathogens worldwide. Therefore, describing the host and geographic ranges of vector species is essential in assessing disease risk, especially in understudied areas, and should be conducted in a One Health context.
View Article and Find Full Text PDFHippocampal transcriptome analysis in ClockΔ19 mice identifies pathways associated with glial cell differentiation and myelination.
J Affect Disord
January 2025
Affiliated Mental Health Center & Hangzhou Seventh People's Hospital and School of Brain Science and Brain Medicine, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, MOE Frontier Science Center for Brain Science and Brain-machine Integration, State Key Laboratory of Brain-machine Intelligence, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; NHC and CAMS Key Laboratory of Medical Neurobiology, Zhejiang University, Hangzhou 310058, China. Electronic address:
Background: ClockΔ19 mice demonstrate behavioral characteristics and neurobiological changes that closely resemble those observed in bipolar disorder (BD). Notably, abnormalities in the hippocampus have been observed in patients with BD, yet direct molecular investigation of human hippocampal tissue remains challenging due to its limited accessibility.
Methods: To model BD, ClockΔ19 mice were employed.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!