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Pollen-pistil interaction in Mauritia flexuosa: structural and cytological aspects provide insight into the reproductive success of a dioecious palm with supra-annual flowering in a semiarid environment.
Plant Biol (Stuttg)
January 2025
Laboratório de Ecologia Vegetal, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Montes Claros, Minas Gerais, Brazil.
The success of pollen-pistil interaction in Mauritia flexuosa (buriti), a palm adapted to the humid ecosystems, 'veredas', within the Cerrado, is influenced by intrinsic and environmental factors. Its supra-annual flowering, dioecy, and adverse climate conditions pose challenges for fertilization, therefore information on floral biology is essential. This study aimed to ascertain stigma receptivity, and elucidate structural, cytochemical, and ultrastructural aspects of the pollen-pistil relationship.
View Article and Find Full Text PDFEnhanced thermogenesis in PAS Kinase-deficient male mice.
Biochem Pharmacol
January 2025
Department of Cell Biology, Faculty of Medicine, Complutense University of Madrid, Spain; Institute of Medical Research at the San Carlos Clinic Hospital (IdISSC), Madrid, Spain.
PAS domain-containing serine/threonine-protein kinase (PASK) is a nutrient and energy sensor regulated by fasting/refeeding conditions in hypothalamic areas involved in controlling energy balance. In this sense, PASK plays a role in coordinating the activation/inactivation of AMP-activated protein kinase (AMPK) and mechanistic target of rapamycin (mTOR) in response to fasting. PASK deficiency protects against the development of diet-induced obesity.
View Article and Find Full Text PDFInhibitory effect of bioactive compounds from quinoa of different colors on the in vitro digestibility of starch.
Int J Biol Macromol
January 2025
State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China; Department of Food Science and Engineering, College of Biological Sciences and Technology, Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, Beijing 100083, China. Electronic address:
This study aimed to compare the bioactive compounds presented in quinoa of various colors, and investigated their inhibitory effect on α-glucosidase activity and the in vitro digestibility of starch. The primary bioactive compounds identified in quinoa included betaine and polyphenols (kaempferol, quercetin, rutin, etc.), with their contents increased as the color of quinoa darkened.
View Article and Find Full Text PDFCharacterisation of the submarine disposal of a Bayer effluent (Gardanne alumina plant, southern France): III: Trace metals in the seawater column in the vicinity of the discharge area in the Mediterranean Sea.
Mar Pollut Bull
January 2025
CREOCEAN, Valparc- bât B, 230 avenue de Rome, 83500 La Seyne-sur-Mer, France.
In the context of evaluating the environmental impact of deep-sea tailing practices, we conducted a case study on the Bayer effluent released into the Mediterranean Sea by the French Gardanne alumina plant. This effluent results from the filtration of red mud, which has previously been discharged into the Cassidaigne canyon for 55 years. In 2015, regulatory changes permitted the released of a filtered effluent instead of the slurry.
View Article and Find Full Text PDFUnveiling the P-solubilizing potential of bacteria enriched from natural colonies of Red Sea Trichodesmium spp.
Sci Total Environ
January 2025
The Interuniversity Institute for Marine Sciences in Eilat, Eilat, Israel; The Fredy and Nadine Herrmann Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem, Israel.
Phosphorus (P) is pivotal for all organisms, yet its availability is, particularly in the marine habitat, limited. Natural, puff-shaped colonies of Trichodesmium, a genus of diazotrophic cyanobacteria abundant in the Red Sea, have been demonstrated to capture and centre dust particles. While this particle mining strategy is considered to help evade nutrient limitation, details behind the mechanism remain elusive.
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