Cyanobacterial biofertilizers in rice agriculture

Vaishampayan, A.; Sinha, Rajeshwar P.; Häder, Donat-Peter; Dey, Tulika; Gupta, Akanksha; Bhan, U.; Rao, A. L. J.

doi:10.1007/bf02857893

Cited by 209 publications

(79 citation statements)

References 232 publications

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“…However, in an agricultural context, symbiotic BNF by legumes is considered to be by far the most dominant source of biologically fixed N (Kennedy and Islam, 2001). Other symbiotic systems with agricultural applications include the Azolla-Nostoc (Vaishampayan et al, 2001), and the Frankia-Alder symbioses (Paul and Clark, 1996). All of these symbioses are genetically defined systems that include specific interactions between diazotroph and host-plant (Kennedy and Islam, 2001).…”

Section: Contribution Of Biological Nitrogen Fixation In Nitrogen Reqmentioning

confidence: 99%

“…The capacity to perform BNF has been detected in various phototrophic microorganisms e.g., aerobic phototrophic Cyanobacteria (Vaishampayan et al, 2001), anaerobic purple-sulfur phototrophs like Chromatium, and green-sulfur phototrophs, e.g., Chlorobium (Young, 1992). Despite the large number of known diazotrophic genera, many isolates have never been assessed for BNF capacity.…”

Section: The Diversity Of Diazotrophic Bacteriamentioning

confidence: 99%

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Role of Diazotrophic Bacteria in Biological Nitrogen Fixation and Plant Growth Improvement

Shin¹,

Islam²,

Benson³

et al. 2016

Korean Journal of Soil Science and Fertilizer

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Though there is an abundant supply of nitrogen in the atmosphere, it cannot be used directly by the biological systems since it has to be combined with the element hydrogen before their incorporation. This process of nitrogen fixation (N 2 -fixation) may be accomplished either chemically or biologically. Between the two elements, biological nitrogen fixation (BNF) is a microbiological process that converts atmospheric di-nitrogen (N 2 ) into plant-usable form. In this review, the genetics and mechanism of nitrogen fixation including genes responsible for it, their types and role in BNF are discussed in detail. Nitrogen fixation in the different agricultural systems using different methods is discussed to understand the actual rather than the potential N 2 -fixation procedure. The mechanism by which the diazotrophic bacteria improve plant growth apart from nitrogen fixation such as inhibition of plant ethylene synthesis, improvement of nutrient uptake, stress tolerance enhancement, solubilization of inorganic phosphate and mineralization of organic phosphate is also discussed. Role of diazotrophic bacteria in the enhancement of nitrogen fixation is also dealt with suitable examples. This mini review attempts to address the importance of diazotrophic bacteria in nitrogen fixation and plant growth improvement.Key words: Biological nitrogen fixation (BNF), Diazotrophic bacteria, Plant growth promotion, N 2 fixing prokaryotes, nif genes Biological nitrogen fixation (BNF) can convert atmospheric di-nitrogen (N2) into plant-usable form, which improves plant growth and yield.

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Section: Contribution Of Biological Nitrogen Fixation In Nitrogen Reqmentioning

confidence: 99%

Section: The Diversity Of Diazotrophic Bacteriamentioning

confidence: 99%

Role of Diazotrophic Bacteria in Biological Nitrogen Fixation and Plant Growth Improvement

Shin¹,

Islam²,

Benson³

et al. 2016

Korean Journal of Soil Science and Fertilizer

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“…A nitrogen accretion of [25][26][27][28][29][30] kg N/ha has been attributed to the activities of these ubiquitous organisms and correlated with the abundance of heterocystous forms as fl oating assemblages [1][2][3]. However, in recent years, an urgent need has felt to address inherent problems, which have limited their extensive exploitation, especially their poor establishment in diverse rice ecologies and soil types.…”

Section: Introductionmentioning

confidence: 99%

Cyanobacterial diversity in the rhizosphere of rice and its ecological significance

et al. 2009

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This investigation was undertaken to characterize the abundance and genera-wise diversity of cyanobacteria in the rice rhizosphere and nitrogen-fi xing ability of the isolated strains. The cyanobacterial strains belonging to the genera Nostoc and Anabaena comprised 80% of the rhizosphere isolates, which were also effi cient in enhancing the germination and growth of wheat seeds and exhibited signifi cantly high protein accumulation and IAA production. Distinct profi les for the cyanobacterial strains were obtained on amplifi cation with extended Hip 1 primer -HipTG, indicative of the diversity among these strains. Our investigation helped in identifying promising cyanobacterial isolates from the rhizosphere of rice, which can be utilized in developing effi cient plant growth promoting cyanobacterial inoculants.

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“…Several N 2 fixing microorganisms have been isolated from rice fields (Park et al 2005;Vaishampayan et al 2001;Xie et al 2003) and strains of Azotobacter, Clostridium, Azospirillum, Herbaspirillum, Burkholderia and Azoarcus, as well as cyanobacteria have,…”

Section: Introductionmentioning

confidence: 99%

Diazotrophic diversity, nifH gene expression and nitrogenase activity in a rice paddy field in Fujian, China

et al. 2009

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The diazotrophic communities in a rice paddy field were characterized by a molecular polyphasic approach including DNA/RNA-DGGE fingerprinting, real time RT-PCR analysis of nifH gene and the measurement of nitrogen fixation activities. The investigation was performed on a diurnal cycle and comparisons were made between bulk and rhizosphere / root soil as well as between fertilized / unfertilized soils. Real time RT-PCR showed no significant difference in the total quantity of nifH expression under the conditions investigated. The functional diversity and dynamics of the nifH gene expressing diazotroph community investigated using RT-PCR-DGGE revealed high diurnal variations, as well as variation between different soil types. Most of the sequence types recovered from the DGGE gels and clone libraries clustered within nifH Cluster I and III (65 different nifH sequences in total). Sequence types most similar to Azoarcus spp., Metylococcus spp., Rhizobium spp., Methylocystis spp., Desulfovibrio spp., Geobacter spp., Chlorobium spp., were abundant and indicate that these species may be responsible for the observed diurnal variation in the diazotrophic community structure in these rice field samples. Previously described diazotrophic cyanobacterial genera in rice fields, such as Nostoc and Cyanothece, were present in the samples but not detectable in RT-PCR assays.

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Cyanobacterial biofertilizers in rice agriculture

Cited by 209 publications

References 232 publications

Role of Diazotrophic Bacteria in Biological Nitrogen Fixation and Plant Growth Improvement

Role of Diazotrophic Bacteria in Biological Nitrogen Fixation and Plant Growth Improvement

Cyanobacterial diversity in the rhizosphere of rice and its ecological significance

Diazotrophic diversity, nifH gene expression and nitrogenase activity in a rice paddy field in Fujian, China

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