Listadamsen2884
Understanding the impacts of agricultural practices on belowground fungal communities is crucial in order to preserve biological diversity in agricultural soils and enhance their role in agroecosystem functioning. Although fungal communities are widely distributed, relatively few studies have correlated agricultural production practices. selleck kinase inhibitor We investigated the diversity, composition and ecological functionality of fungal communities in roots of winter wheat (Triticum aestivum) growing in conventional and organic farming systems. Direct and nested polymerase chain reaction (PCR) amplifications spanning the internal transcribed spacer (ITS) region of the rDNA from pooled fine root samples were performed with two different sets of fungal specific primers. Fungal identification was carried out through similarity searches against validated reference sequences (RefSeq). The R package 'picante' and FUNGuild were used to analyse fungal community composition and trophic mode, respectively. Either by direct or cloning seqngs suggest that organic farming systems have a positive effect on fungal communities in winter wheat crops.
The fecal microbiota from obese individuals can induce obesity in animal models. In addition, studies in humans, animal models and dogs have revealed that the fecal microbiota of subjects with obesity is different from that of lean subjects and changes after weight loss. However, the impact of weight loss on the fecal microbiota in dogs with obesity has not been fully characterized.
In this study, we used 16S rRNA gene sequencing to investigate the differences in the fecal microbiota of 20 pet dogs with obesity that underwent a weight loss program. The endpoint of the weight loss program was individually tailored to the ideal body weight of each dog. In addition, we evaluated the qPCR based Dysbiosis Index before and after weight loss.
After weight loss, the fecal microbiota structure of dogs with obesity changed significantly (
ANOSIM;
=0.016,
=0.073), showing an increase in bacterial richness (
=0.007), evenness (
=0.007) and the number of bacterial species (
=0.007). The fecal microbiota composition of obese dogs after weight loss was characterized by a decrease in Firmicutes (92.3% to 78.2%,
=0.001), and increase in Bacteroidetes (1.4% to 10.1%,
=0.002) and Fusobacteria (1.6% to 6.2%,
=0.040). The qPCR results revealed an overall decrease in the Dysbiosis Index, driven mostly due to a significant decrease in
(
=0.030), and increase in
spp. (
=0.017).
The changes observed in the fecal microbiota of dogs with obesity after weight loss with a weight loss diet rich in fiber and protein were in agreement with previous studies in humans, that reported an increase of bacterial biodiversity and a decrease of the ratio Firmicutes/Bacteroidetes.
The changes observed in the fecal microbiota of dogs with obesity after weight loss with a weight loss diet rich in fiber and protein were in agreement with previous studies in humans, that reported an increase of bacterial biodiversity and a decrease of the ratio Firmicutes/Bacteroidetes.Understanding ecological stoichiometric characteristics of soil nutrient elements, such as carbon (C), nitrogen (N) and phosphorus (P) is crucial to guide ecological restoration of plantations in ecologically vulnerable areas, such as alpine and subalpine regions. However, there has been only a few related studies, and thus whether and how different tree species would affect soil CNP ecological stoichiometry remains unclear. We compared soil CNP ecological stoichiometry of Pinus tabulaeformis, Larix kaempferi and Cercidiphyllum japonicum to primary shrubland in a subalpine region. We observed strong tree-specific and depth-dependent effects on soil CNP stoichiometry in subalpine plantations. In general, the CN, CP and NP of topsoil (0-10 cm) are higher than subsoil (>10 cm) layer at 0-30 cm depth profiles. The differences in CN, NP and CP at the topsoil across target tree species were significantly linked to standing litter stock, tree biomass/total aboveground biomass and Margalef's index of plant community, respectively, whereas the observed variations of CN, NP and CP ratio among soil profiles are closely related to differences in soil bulk density, soil moisture, the quantity and quality of aboveground litter inputs as well as underground fine root across plantations examined. Our results highlight that soil nutrients in plantation depend on litter quantity and quality of selected tree species as well as soil physical attributes. Therefore, matching site with trees is crucial to enhance ecological functioning in degraded regions resulting from human activity.
The world-wide lockdown caused by Coronavirus Disease 2019 (COVID-19) has upended the trajectories of lives everywhere. The medical profession has been on the front lines of this rapidly developing situation, which in turn has called for unprecedented changes in the medical school curriculum. These changes have severe implications for medical students interested in applying to competitive surgical specialties like orthopedics.
As medical students in 3 different class years pursuing orthopedic surgery, we provide our perspectives on the impact that COVID-19 has had on medical student orthopedic education.
With the removal of away rotations and a shift to virtual interviews, rising fourth year medical students are arguably the most impacted as they prepare for the orthopedic residency application process. Third year students, who are in the exploratory phase of choosing a specialty, also face uncertainties in the shift to a "new" clerkship experience that may (1) be of shorter duration, (2) implement shifn landscape remains uncertain amid the evolving conditions of COVID-19, as medical students we strive to learn from this pandemic and respond to future unforeseen challenges with resilience, dedication, and compassion all qualities we admire in orthopedic surgeons.The LIM domain-containing proteins Pinch1/2 regulate integrin activation and cell-extracellular matrix interaction and adhesion. Here, we report that deleting Pinch1 in limb mesenchymal stem cells (MSCs) and Pinch2 globally (double knockout; dKO) in mice causes severe chondrodysplasia, while single mutant mice do not display marked defects. Pinch deletion decreases chondrocyte proliferation, accelerates cell differentiation and disrupts column formation. Pinch loss drastically reduces Smad2/3 protein expression in proliferative zone (PZ) chondrocytes and increases Runx2 and Col10a1 expression in both PZ and hypertrophic zone (HZ) chondrocytes. Pinch loss increases sclerostin and Rankl expression in HZ chondrocytes, reduces bone formation, and increases bone resorption, leading to low bone mass. In vitro studies revealed that Pinch1 and Smad2/3 colocalize in the nuclei of chondrocytes. Through its C-terminal region, Pinch1 interacts with Smad2/3 proteins. Pinch loss increases Smad2/3 ubiquitination and degradation in primary bone marrow stromal cells (BMSCs).
