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Mangroves are the main intertidal ecosystems with varieties of root types along the tropical and subtropical coastlines around the world. The typical characteristics of mangrove habitats, including the abundant organic matter and nutrients, as well as the strong reductive environment, are favor for the production of hydrogen sulfide (H2S). H2S, as a pivotal signaling molecule, has been evidenced in a wide variety of plant physiological and developmental processes. However, whether H2S functions in the mangrove root system establishment is not clear yet. Here, we reported the possible role of H2S in regulation of Kandelia obovata root development and growth by tandem mass tag (TMT)-based quantitative proteomic approaches coupled with bioinformatic methods. The results showed that H2S could induce the root morphogenesis of K. obovata in a dose-dependent manner. The proteomic results successfully identified 8075 proteins, and 697 were determined as differentially expressed proteins. Based on the functional enrichment analysis, we demonstrated that H2S could promote the lateral root development and growth by predominantly regulating the proteins associated with carbohydrate metabolism, sulfur metabolism, glutathione metabolism and other antioxidant associated proteins. In addition, transcriptional regulation and brassinosteroid signal transduction associated proteins also act as important roles in lateral root development. The protein–protein interaction analysis further unravels a complicated regulation network of carbohydrate metabolism, cellular redox homeostasis, protein metabolism, secondary metabolism, and amino acid metabolism in H2S-promoted root development and growth of K. obovata. Overall, our results revealed that H2S could contribute to the morphogenesis of the unique root system of mangrove plant K. obovata , and play a positive role in the adaption of mangrove plants to intertidal habitats. [ABSTRACT FROM AUTHOR]

Gao, G.-F.; Zhang, X.-M.; Li, P.-F.; Simon, M.; Shen, Z.-J.; Chen, J.; Gao, C.-H., and Zheng, H.L., 2020. Examining soil carbon gas (CO2, CH4) emissions and the effect on functional microbial abundances in the Zhangjiang Estuary Mangrove Reserve. Journal of Coastal Research, 36(1), 54–62. Coconut Creek (Florida), ISSN 0749-0208. Mangrove soil is regarded as an important source of CO2 and CH4 because of its large carbon pools. However, little is known about the magnitudes of CO2 and CH4 emitted from mangrove soils and their relationships with functional microbial abundances. Here, a field experiment was conducted in Zhangjiang Estuary Mangrove from August 2014 to September 2016. Soils dominated by species Kandelia obovata (KO), Avicennia marina (AM), and bare mudflat (Mud) were randomly established, respectively. The results showed that soil of the Zhangjiang Estuary Mangrove wetland is a significant source of CH4 (ranging from –35.36 to 2822.52 µg m–2 h–1) and CO2 (ranging from –28.45 to 116.26 mg m–2 h–1), with a significant spatial and seasonal variation pattern. The soil CH4 emissions were positively correlated to the mcrA gene abundance and organic matter content. Meanwhile, the 16S rRNA and ANME-pmoA gene abundances were positively correlated to the soil CO2 emissions. When considering only the soil-atmosphere exchange of carbon gas, soil CO2 emission was the major contributor to the global warming potential, accounting for 64.66%–96.11%. The profound variations of soil CH4 and CO2 emissions may imply the important role of dominant mangrove vegetation on soil microbes and carbon gas emissions. [ABSTRACT FROM AUTHOR]

Background: The role of dyslipidemia in pancreatic neuroendocrine tumors (PanNENs) is unclear. The aim of this study is to analyze the characteristics of serum lipid spectrum in PanNENs, and the effect of the variation in lipid profile on the development of PanNENs clinicopathological features and prognosis., Methods: All PanNENs patients between November 2012 and September 2020 in the authors' research center were identified from patient medical records and databases. A total of 185 with PanNENs patients were ultimately included in this study, including 100 nonfunctional PanNENs and 85 insulinomas. Clinicopathologic features, serum lipid level and overall survival results were retrospectively analyzed using statistical methods., Results: In 185 PanNENs, 95 (51.4%) patients appear to have dyslipidemia. Patients with insulinoma had a lower proportion of abnormal HDL than those with nonfunctional PanNENs (10.6% vs 23%, P=0.026). The mean serum HDL levels of insulinomas were 0.131 mmol/L higher than the NF-PanNENs (1.306 ± 0.324 vs 1.175 ± 0.315, P=0.006). In multivariate logistic analysis, high levels of HDL are negatively correlated to tumor size (OR 0.233, 95% CI: 0.069-0.790, P=0.019), but HDL was not associated with pathological grade or metastasis. And a correlation has been found between hypercholesterolemia and the original location of the tumor (OR:0.224, 95%CI: 0.066-0.753, P =0.016). In addition, the outcome of the survival analysis revealed that dyslipidemia did not influence the prognosis of PanNENs patients (P>0.05)., Conclusions: HDL was negatively correlated with the tumor size of PanNENs. The serum HDL level of insulinoma patients is higher than nonfunctional PanNENs., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Meng, Fan, Yang, Li, Liu, Gao, Gao, Pang and Zhan.)

Theory and experiments support that plant invasions largely impact aboveground biodiversity and function. Yet, much less is known on the influence of plant invasions on the structure and function of the soil microbiome of coastal wetlands, one of the largest major reservoirs of biodiversity and carbon on Earth. We studied the continental-scale invasion of Spartina alterniflora across 2451 km of Chinese coastlines as our model-system and found that S. alterniflora invasion can largely influence the soil microbiome (across six depths from 0 to 100 cm), compared with the most common microhabitat found before invasion (mudflats, Mud). In detail, S. alterniflora invasion was not only positively associated with bacterial richness but also resulted in important biotic homogenization of bacterial communities, suggesting that plant invasion can lead to important continental scale trade-offs in the soil microbiome. We found that plant invasion changed the community composition of soil bacterial communities across the soil profile. Moreover, the bacterial communities associated with S. alterniflora invasions where less responsive to climatic changes than those in native Mud microhabitats, suggesting that these new microbial communities might become more dominant under climate change. Plant invasion also resulted in important reductions in the complexity and stability of microbial networks, decoupling the associations between microbes and carbon pools. Taken together, our results indicated that plant invasions can largely influence the microbiome of coastal wetlands at the scale of China, representing the first continental-scale example on how plant invasions can reshuffle the soil microbiome, with consequences for the myriad of functions that they support., (© 2022 John Wiley & Sons Ltd.)