Conservation tillage increased soil bacterial diversity and improved soil nutrient status on the Loess Plateau in China
ARCHIVES OF AGRONOMY AND SOIL SCIENCE
Authors: Wang, Hao; Wang, Shulan; Wang, Rui; Wang, Xiaoli; Li, Jun
Abstract
Conservation tillage can improve the soil nutrient status in drylands. This improvement is partially attributable to changes in the soil bacteria. In this study, we explored the bacterial factors involved in soil nutrients improvement under conservation tillage based on an 8-year in situ field trial. Two conservation tillage methods, no tillage (NT) and subsoiling tillage (ST) were used, and a moldboard plow (CT) was used as a control. The results indicated that compared to the CT, NT and ST significantly increased ACE indices by 12.4% and 10.5%, Shannon indices by 22.8% and 18.8%, respectively and this increase was positively correlated with the soil organic matter (SOM), available nitrogen (AN) and available phosphorus (AP) contents. In addition, Acidobacteria, Firmicutes and Nitrospirae were more abundant in the NT (20.8%, 5.2%, 7.04%) and ST (22.9%, 9.9%, 7.1%), while Planctomycetes was lower in the NT (-22.8%) and ST (-19.9%) compared to CT. Further analyses showed that the increase in the abundance of Acidobacteria was positively correlated with SOM, AP and AN. Overall, conservation tillage increased bacterial diversity and abundance and tested beneficial for soil nutrient improvement and the increased abundance of Acidobacteria might play an important role in soil nutrient improvement.
Plants-Derived Biomolecules as Potent Antiviral Phytomedicines: New Insights on Ethnobotanical Evidences against Coronaviruses
PLANTS-BASEL
Authors: Siddiqui, Arif Jamal; Danciu, Corina; Ashraf, Syed Amir; Moin, Afrasim; Singh, Ritu; Alreshidi, Mousa; Patel, Mitesh; Jahan, Sadaf; Kumar, Sanjeev; Alkhinjar, Mulfi I. M.; Badraoui, Riadh; Snoussi, Mejdi; Adnan, Mohd
Abstract
SARS-CoV-2 infection (COVID-19) is in focus over all known human diseases, because it is destroying the world economy and social life, with increased mortality rate each day. To date, there is no specific medicine or vaccine available against this pandemic disease. However, the presence of medicinal plants and their bioactive molecules with antiviral properties might also be a successful strategy in order to develop therapeutic agents against SARS-CoV-2 infection. Thus, this review will summarize the available literature and other information/data sources related to antiviral medicinal plants, with possible ethnobotanical evidence in correlation with coronaviruses. The identification of novel antiviral compounds is of critical significance, and medicinal plant based natural compounds are a good source for such discoveries. In depth search and analysis revealed several medicinal plants with excellent efficacy against SARS-CoV-1 and MERS-CoV, which are well-known to act on ACE-2 receptor, 3CLpro and other viral protein targets. In this review, we have consolidated the data of several medicinal plants and their natural bioactive metabolites, which have promising antiviral activities against coronaviruses with detailed modes of action/mechanism. It is concluded that this review will be useful for researchers worldwide and highly recommended for the development of naturally safe and effective therapeutic drugs/agents against SARS-CoV-2 infection, which might be used in therapeutic protocols alone or in combination with chemically synthetized drugs.