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Response of photosynthesis to light and CO concentration in spring wheat under progressive drought stress.
BMC Plant Biol
March 2025
Institute of Arid Meteorology, China Meteorological Administration / Key Open Laboratory of Arid Climate Change and Disaster Reduction of CMA / Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Lanzhou, 730020, China.
Background: Global climate change significantly affects photosynthesis in spring wheat. However, the successive dynamic effects of multiple environmental interactions on photosynthesis in spring wheat have been inadequately investigated. This study conducted pot control experiments to determine photosynthesis characteristics, namely light and CO response curves, in spring wheat under progressive drought stress.
View Article and Find Full Text PDFOverwinter survival of an estuarine resident fish (Fundulus heteroclitus) in North Carolina salt marsh creeks.
J Fish Biol
March 2025
U.S. Geological Survey, Eastern Ecological Science Center, S.O. Conte Research Laboratory, Turners Falls, Massachusetts, USA.
The mummichog Fundulus heteroclitus is a trophically important fish inhabiting Atlantic coastal salt marshes, with few in situ estimates of overwinter survival throughout the species range. We estimated overwinter apparent survival rates of F. heteroclitus at the approximate mid-latitudinal species range [coastal North Carolina (USA)] in four tidal creeks that experience variable winter water temperatures.
View Article and Find Full Text PDFUnveiling active nitrate and nitrite cycling in a eutrophic coastal bay, southern China from a dual isotope perspective.
Mar Environ Res
March 2025
College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China.
Increased nutrient loading in coastal waters poses a threat to marine ecosystems. To develop effective management strategies, a clearer understanding of nitrogen cycle dynamics for the main species is crucial for understudied urbanized areas. By employing stable isotopes of nitrate (δN and δO) and the rarely reported nitrite isotopes, we found a decoupling between physical mixing and microbial transformative processes in the Xiamen Bay.
View Article and Find Full Text PDFδN and δC cycles in narwhal () embedded teeth reveal seasonal variation in ecology and/or physiology.
R Soc Open Sci
March 2025
Arctic Aquatic Research Division, Fisheries and Oceans Canada, Winnipeg, Manitoba, Canada.
Monitoring Arctic marine mammals in response to rapid climate change requires reliable longitudinal data. To obtain such data is challenging, but sequential measurements of stable isotopes (SI) from metabolically inert tissues like dentine allow for chronological reconstruction of SI data that can provide insights into whale life history, behaviour and physiology. This study examined dentine samples from narwhal embedded canines to reconstruct individual SI profiles and assess intra-annual variation in δN and δC.
View Article and Find Full Text PDFDynamic Transcriptional Regulation of the Hypothalamic-Pituitary-Testis Axis in the Seasonally Breeding Teleost .
Int J Mol Sci
February 2025
CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266000, China.
Spermatogenesis, the process of male germ cell development, is tightly regulated by the hypothalamic-pituitary-testis (HPT) axis in seasonally breeding teleosts. Despite its importance, our understanding of how the brain and male germ cells coordinate key transitions-such as testis initiation and maturation-remains limited, particularly in species with distinct seasonal reproductive cycles. Black rockfish (), a marine viviparous teleost, exhibits a prolonged testis quiescent phase lasting three-quarters of the year, with testis initiation occurring in September and maturation concluding in November and December.
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