Through a variety of mechanisms, including increasing the amount of readily available mineral nutrients, regulating phytohormone levels, and biocontrol of phytopathogens, plant growth-promoting rhizobacteria (PGPR) associated with the plant rhizosphere either directly or indirectly stimulates plant growth and development. The establishment, survival, and persistence of PGPR inoculants are widely acknowledged to be contingent upon these two parameters, in addition to the intricate network of interactions within the rhizosphere. In general, the soil is a moist environment with significant amounts of carbon that have been degraded and harbors a large population of soil microbes. The rhizo-microbiome is crucial to agriculture because a wide variety of root exudates and plant cell debris attract unique and distinct patterns of microbial colonization. The rhizo-microbiome plays a crucial role in the manufacture and regulation of extracellular molecules, including hormones, secondary metabolites, antibiotics, and various signaling chemicals. Additionally, the microbial composition within the rhizo-microbiome influences soil texture enhancement. Research has shown that PGPR can be used to treat plants or inoculate plants to promote plant development. PGPR alters the physiology of the entire plant, which enhances nutrient uptake and affects the effectiveness of root activity. The specific biochemical processes of plants involved in this phenomenon are often not well understood. Nevertheless, new studies have shed light on the mechanisms via which signaling by PGPR can induce various plant responses, both at the local and systemic levels. Insufficient information is available regarding the impact of the PGPR mechanism and molecules on metabolic pathways in root characteristics. Consequently, this review will concentrate on elucidating the PGPR mechanism and identifying the essential molecules that exert influence on root-microbe interactions.

Fine root decomposition is a physio-biochemical activity that is critical to the global carbon cycle (C) in forest ecosystems. It is crucial to investigate the mechanisms and factors that control fine root decomposition in forest ecosystems to understand their system-level carbon balance. This process can be influenced by several abiotic (e.g., mean annual temperature, mean annual precipitation, site elevation, stand age, salinity, soil pH) and biotic (e.g., microorganism, substrate quality) variables. Comparing decomposition rates within sites reveals positive impacts of nitrogen and phosphorus concentrations and negative effects of lignin concentration. Nevertheless, estimating the actual fine root breakdown is difficult due to inadequate methods, anthropogenic activities, and the impact of climate change. Herein, we propose that how fine root substrate and soil physiochemical characteristics interact with soil microorganisms to influence fine root decomposition. This review summarized the elements that influence this process, as well as the research methods used to investigate it. There is also need to study the influence of annual and seasonal changes affecting fine root decomposition. This cumulative evidence will provide information on temporal and spatial dynamics of forest ecosystems, and will determine how logging and reforestation affect fine root decomposition.

Feeding the world with good agricultural and forestry practices is becoming a challenge and researchers are working on different approaches to find the most ecofriendly solution. Chemical fertilizers are increasingly being used, despite the fact that their intensive use has proven to have a harmful effect on soil, water, the environment, and, ultimately, plants and humans’ health. Biofertilizer has been considered a better option than other conventional fertilizers since it contains a typical population of helpful microorganisms that provide nutrients to the soil required by the plant without destroying the precious environment. However, in terms of understanding their proper mechanisms and importance for sustainable farming, efficient knowledge of microorganism-based biofertilizers remains in the shadows. This study aims to explore the different challenges faced regarding microorganism-based biofertilizer use in agriculture and forestry. It will support the overcoming of identified challenges and increase farmers’ acceptance as the main option to provide the required nutrition for the soil to obtain better quality and a higher quantity of agricultural products. Overall, priority should be given to developing advanced technology and proper storage mechanisms, distribution mechanisms, and subsidies in order to gain popularity and reliability. This article is timely because biofertilizers are currently undergoing manufacture and application; now is the time to identify challenges and solutions for research and development.

More travellers are making swift ascents to higher altitudes without sufficient acclimatization or pharmaceutical prophylaxis as road connectivity develops in the Himalayan region of Nepal. Our study connects ascent rate with prevalence and severity of acute mountain sickness (AMS) among patients admitted to the emergency ward of the Mustang district hospital in Nepal. A register-based, cross-sectional study was conducted between June 2018 and June 2019 to explore associations of Lake Louise scores with ascent profile, sociodemographic characteristics, and comorbidities using chi-square test, t-test, and Bayesian logistic regression. Of 105 patients, incidence of AMS was 74%, of which 61%, 36%, and 3% were mild, moderate, and severe cases, respectively. In the Bayesian-ordered logistic model of AMS severity, ascent rate (odds ratio 3.13) and smoking (odds ratio 0.16) were significant at a 99% credible interval. Based on the model-derived counterfactual, the risk of developing moderate or severe AMS for a middle-aged, non-smoking male traveling from Pokhara to Muktinath (2978m altitude gain) in a single day is twice that of making the ascent in three days. Ascent rate was strongly associated with the likelihood of developing severe AMS among travellers with AMS symptoms visiting Mustang Hospital’s Emergency Ward.

Forest ecosystems are essential to the global carbon cycle because they are the biggest terrestrial carbon reserves. In the management of forests, thinning is a commonly employed strategy, impacting the respiration and biomass loss of trees, thereby modifying forest carbon dynamics. However, there is a lack of scientific research to confirm the impacts of thinning intensities on carbon storage in trees, soil layers, shrubs, and ground vegetation layers as well as its impact on wood production and growth rate. The goal of this study was to find the optimal thinning levels for increasing carbon sequestration during the growth stage of the Korean pine (Pinus koraiensis) middle-aged plantations in Northeast China. In this study, thinning intensity (0, 10, 11, 16, 18, and 22%) affected the carbon storage of trees, tree growth, volume, and, we suspected, soil layer, shrubs, and vegetation (herbs, litter, and grass) also. Specifically, after four years of thinning, the 18% treatment significantly increased total carbon storage, individual organ storage, growth, and tree volume (p < 0.05). These results give us abundant information about how thinning affects the dynamics of carbon storage, wood production, and the interactions between soil and plants in P. koraiensis plantations, contributing to multi-objective management strategies for optimizing carbon sequestration, wood production, and ecosystem health.