Relationship between survival rates of associative nitrogen-fixers on roots and yield response of plants to inoculation

Белимов, А. А.; Kunakova, A. M.; Vasilyeva, N. D.; Gruzdeva, E.V.; Vorobiev, N.I.; Kojemiakov, A. P.; Хамова, О Ф; Postavskaya, S.M.; Sokova, S.A.

doi:10.1111/j.1574-6941.1995.tb00142.x

Cited by 15 publications

(2 citation statements)

References 19 publications

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“…Associative N 2 fixation has been suggested to be under the genetic control of the host plant [12,139]. Differences in associative N 2 fixation have been observed between different lines of rice [140], wheat [82,141], maize and sorghum [142,143], millet [144], and among various species of grasses [41,145] and weeds [146].…”

Section: Management Practicesmentioning

confidence: 99%

Enhancing Non-symbiotic N2 Fixation in Agriculture

Roper¹,

Gupta²

2016

TOASJ

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Much of the demand for nitrogen (N) in cereal cropping systems is met by using N fertilisers, but the cost of production is increasing and there are also environmental concerns. This has led to a growing interest in exploring other sources of N such as biological N 2 fixation. Non-symbiotic N 2 fixation (by free-living bacteria in soils or associated with the rhizosphere) has the potential to meet some of this need especially in the lower input cropping systems worldwide. There has been considerable research on nonsymbiotic N 2 fixation, but still there is much argument about the amount of N that can potentially be fixed by this process largely due to shortcomings of indirect measurements, however isotope-based direct methods indicate agronomically significant amounts of N 2 fixation both in annual crop and perennial grass systems. New molecular technologies offer opportunities to increase our understanding of N 2 -fixing microbial communities (many of them non-culturable) and the molecular mechanisms of non-symbiotic N 2 fixation. This knowledge should assist the development of new plant-diazotrophic combinations for specific environments and more sustainable exploitation of N 2 -fixing bacteria as inoculants for agriculture. Whilst the ultimate goal might be to introduce nitrogenase genes into significant non-leguminous crop plants, it may be more realistic in the shorter-term to better synchronise plant-microbe interactions to enhance N 2 fixation when the N needs of the plant are greatest. The review explores possibilities to maximise potential N inputs from non-symbiotic N 2 fixation through improved management practices, identification of better performing microbial strains and their successful inoculation in the field, and plant based solutions.

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Section: Management Practicesmentioning

confidence: 99%

Enhancing Non-symbiotic N2 Fixation in Agriculture

Roper¹,

Gupta²

2016

TOASJ

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“…However, at times a phage infection lowers the fitness of the host bacterium, which is also F I G U R E 1 Ecosystem and other environmental challenges for ecological restoration of degraded lands, where current techniques face challenges but filamentous phage has potential to provide solutions. FP, filamentous phage TA B L E 1 Potential bacterial targets to explore filamentous phage to improve the benefits of commercial inoculants being used to promote plant growth under different environmental stresses Belimov, Kojemiakov, and Chuvarliyeva (1995), Belimov Kunakova, et al (1995), Bashan and Holguin (1997), Singh and Kapoor (1999) Xϕ,f1ϕ,Ikeϕ,PR6FSϕ,SFϕ,fdϕ,If1ϕ,AE2ϕ,Ec9ϕ,HRϕ,ZJ/2ϕ,CUS1ϕ;Yersinia: Ypfϕ;CUS2ϕ Sp.…”

Section: Introductionmentioning

confidence: 99%

Application of filamentous phages in environment: A tectonic shift in the science and practice of ecorestoration

Sharma

Karmakar

Kumar

et al. 2019

Ecology and Evolution

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Theories in soil biology, such as plant–microbe interactions and microbial cooperation and antagonism, have guided the practice of ecological restoration (ecorestoration). Below‐ground biodiversity (bacteria, fungi, invertebrates, etc.) influences the development of above‐ground biodiversity (vegetation structure). The role of rhizosphere bacteria in plant growth has been largely investigated but the role of phages (bacterial viruses) has received a little attention. Below the ground, phages govern the ecology and evolution of microbial communities by affecting genetic diversity, host fitness, population dynamics, community composition, and nutrient cycling. However, few restoration efforts take into account the interactions between bacteria and phages. Unlike other phages, filamentous phages are highly specific, nonlethal, and influence host fitness in several ways, which make them useful as target bacterial inocula. Also, the ease with which filamentous phages can be genetically manipulated to express a desired peptide to track and control pathogens and contaminants makes them useful in biosensing. Based on ecology and biology of filamentous phages, we developed a hypothesis on the application of phages in environment to derive benefits at different levels of biological organization ranging from individual bacteria to ecosystem for ecorestoration. We examined the potential applications of filamentous phages in improving bacterial inocula to restore vegetation and to monitor changes in habitat during ecorestoration and, based on our results, recommend a reorientation of the existing framework of using microbial inocula for such restoration and monitoring. Because bacterial inocula and biomonitoring tools based on filamentous phages are likely to prove useful in developing cost‐effective methods of restoring vegetation, we propose that filamentous phages be incorporated into nature‐based restoration efforts and that the tripartite relationship between phages, bacteria, and plants be explored further. Possible impacts of filamentous phages on native microflora are discussed and future areas of research are suggested to preclude any potential risks associated with such an approach.

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