Journal ArticleDOI
Nitrogen-fixing bacteria associated with leguminous and non-leguminous plants
TLDR
A wide diversity of nitrogen-fixing bacterial species belonging to most phyla of the Bacteria domain have the capacity to colonize the rhizosphere and to interact with plants.Abstract:
Nitrogen is generally considered one of the major limiting nutrients in plant growth. The biological process responsible for reduction of molecular nitrogen into ammonia is referred to as nitrogen fixation. A wide diversity of nitrogen-fixing bacterial species belonging to most phyla of the Bacteria domain have the capacity to colonize the rhizosphere and to interact with plants. Leguminous and actinorhizal plants can obtain their nitrogen by association with rhizobia or Frankia via differentiation on their respective host plants of a specialized organ, the root nodule. Other symbiotic associations involve heterocystous cyanobacteria, while increasing numbers of nitrogen-fixing species have been identified as colonizing the root surface and, in some cases, the root interior of a variety of cereal crops and pasture grasses. Basic and advanced aspects of these associations are covered in this review.read more
Citations
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Book ChapterDOI
The Importance of the Microbial N Cycle in Soil for Crop Plant Nutrition.
Penny R. Hirsch,Tim H. Mauchline +1 more
TL;DR: The effects of various agricultural practices that exploit fixation, retard nitrification, and reduce denitrification are presented, together with strategies that minimize inorganic fertilizer applications and curtail losses.
Book ChapterDOI
Endophytic Nitrogen-Fixing Bacteria as Biofertilizer
TL;DR: In this paper, the authors used biological nitrogen fixation (BNF) as an alternative to chemical N fertilizers to provide nitrogen nutrition to the plants in an efficient and sustainable manner.
Book ChapterDOI
Agroforestry: Fertilizer Trees.
Gudeta W. Sileshi,Paramu L. Mafongoya,Festus K. Akinnifesi,Elijah Phiri,Paxie W. Chirwa,Tracy Beedy,W. I. Makumba,George Nyamadzawo,Joyce Njoloma,Menas Wuta,P. Nyamugafata,Obert Jiri +11 more
TL;DR: Fertilizer trees are defined as nitrogen-fixing woody perennials used for soil fertility improvement in arable lands and pastures as discussed by the authors, and they are also an important component of multifunctional agriculture that provides timber, fodder, shade, watershed management and resilience to climate change.
Journal ArticleDOI
Allelopathy in agro-ecosystems: a critical review of wheat allelopathy-concepts and implications
TL;DR: A contemporary synthesis of the existing data is presented that how wheat allelopathy can be exploited to biologically control the insects, pests, and diseases, and to enhance the soil quality by adding nutrients for crop plants during decomposition from residues and ameliorate soil environment for microbes.
Posted ContentDOI
Specificity in Legume-Rhizobia Symbioses
Mitchell Andrews,Morag E Andrews +1 more
TL;DR: In this paper, a review of the literature on legume-rhizobia symbioses was reviewed, and genotypically characterised rhizobia related to the taxonomy of the legumes they were isolated from.
References
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Journal ArticleDOI
Generic assignments, strain histories, and properties of pure cultures of cyanobacteria
TL;DR: Revisions are designed to permit the generic identification of cultures, often difficult through use of the field-based system of phycological classification, and are both constant and readily determinable in cultured material.
Journal ArticleDOI
Biological Nitrogen Fixation
Robert H. Burris,Gary P. Roberts +1 more
TL;DR: Highlights in biological nitrogen fixation during the last fifty years are highlighted.
Journal ArticleDOI
Applications of the acetylene-ethylene assay for measurement of nitrogen fixation
TL;DR: The biochemical basis of the assay is described along with relevant characteristics including Km, C2H2/N2 conversion factor, and specific N2[C2H 2]-fixing activities obtained with various systems, and methods of measurement of N2 fixation are compared.
Journal ArticleDOI
Coordinating nodule morphogenesis with rhizobial infection in legumes.
TL;DR: This review focuses on the tissue-specific nature of the developmental processes associated with nodulation and the mechanisms by which these processes are coordinated during the formation of a nodule.
Journal ArticleDOI
Genetic regulation of biological nitrogen fixation
Ray Dixon,Daniel Kahn +1 more
TL;DR: The ability of microorganisms to use nitrogen gas as the sole nitrogen source and engage in symbioses with host plants confers many ecological advantages, but also incurs physiological penalties because the process is oxygen sensitive and energy dependent.