Author:
Kosty Melissa,Pule-Meulenberg Flora,Humm Ethan A.,Martínez-Hidalgo Pilar,Maymon Maskit,Mohammadi Sophia,Cary Josh,Yang Paul,Reddi Krisanavane,Huntemann Marcel,Clum Alicia,Foster Brian,Foster Bryce,Roux Simon,Palaniappan Krishnaveni,Varghese Neha,Mukherjee Supratim,Reddy T.B.K.,Daum Chris,Copeland Alex,Ivanova Natalia N.,Kyrpides Nikos C.,del Rio Tajana Glavina,Eloe-Fadrosh Emiley A.,Hirsch Ann M.
Abstract
AbstractAs the world population increases, improvements in crop growth and yield will be needed to meet rising food demands, especially in countries that have not developed agricultural practices optimized for their own soils and crops. In many African countries, farmers improve agricultural productivity by applying synthetic fertilizers and pesticides to crops, but their continued use over the years has had serious environmental consequences including air and water pollution as well as loss of soil fertility. To reduce the overuse of synthetic amendments, we are developing inocula for crops that are based on indigenous soil microbes, especially those that enhance plant growth and improve agricultural productivity in a sustainable manner. We first isolated environmental DNA from soil samples collected from an agricultural region to study the composition of the soil microbiomes and then used Vigna unguiculata (cowpea), an important legume crop in Botswana and other legumes as “trap” plants using the collected soil to induce nitrogen-fixing nodule formation. We have identified drought-tolerant bacteria from Botswana soils that stimulate plant growth; many are species of Bacillus and Paenibacillus. In contrast, the cowpea nodule microbiomes from plants grown in these soils house mainly rhizobia particularly Bradyrhizobium, but also Methylobacterium spp. Hence, the nodule microbiome is much more limited in non-rhizobial diversity compared to the soil microbiome, but also contains a number of potential pathogenic bacteria.
Publisher
Cold Spring Harbor Laboratory
Reference60 articles.
1. Barrow, C.J. Land Degradation – Developments and Breakdown of Terrestrial Environments. Cambridge University Press: Cambridge, United Kingdom, 1991, ISBN 97-0-521-35333-5.
2. Above ground woody community attributes, biomass and carbon stocks along a rainfall gradient in the savannas of the central lowveld, South Africa;South Afr J Bot,2011
3. “Botswana Country Commercial Guide.” export.gov, 2017. Available online: https://www.export.gov/article?id=Botswana-Agricultural-Sectors (accessed on 23 June 2019).
4. Burgess, J. Country Pasture/Forage Resource Profiles: Botswana; Food and Agricultural Organization of the United Nations: Rome, Italy, 2006; pp. 1–46.
5. Food and Agricultural Organization of the United Nations. Global Partnership Initiative for Plant Breeding Capacity Building: Plant Breeding Programs in Botswana. Available online: http://www.fao.org/in-action/plant-breeding/our-partners/africa/botswana/en/ (accessed on 23 June 2019).
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