Effect of temperature and soil moisture on the survival and symbiotic effectiveness of Frankia spp.

Sayed, W. F.; Wheeler, Chris; Zahran, H. H.; Shoreit, A. A. M.

doi:10.1007/s003740050324

Cited by 22 publications

(16 citation statements)

References 12 publications

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“…However, densities at the beginning of the incubation were very low with about 10 4 cells (g soil) −1 and increased to final abundance values of about 10 6 cells (g soil) −1 which represented numbers normally encountered in soils in our previous studies using qPCR-based analyses [27,29]. The increase might therefore reflect changing environmental conditions in our experimental set up, with low numbers obtained after storage of soils at 4 • C, and increasing numbers as a function of increasing temperature (23 • C), enhanced water availability and consequently better nutrient availability [30].…”

supporting

confidence: 58%

Growth responses of indigenous Frankia populations to edaphic factors in actinorhizal rhizospheres

Samant

Dawson

Hahn

2015

Systematic and Applied Microbiology

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supporting

confidence: 58%

Growth responses of indigenous Frankia populations to edaphic factors in actinorhizal rhizospheres

Samant

Dawson

Hahn

2015

Systematic and Applied Microbiology

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“…Interestingly, these authors also report a positive correlation with Frankia infective on Elaeagnus angustifolia across the same pH range, indicating the eVects of pH may be strain-speciWc. Soil temperature and moisture have also been observed to diVerentially aVect host-infection groups of Frankia (Sayed et al 1997), and structure of Frankia within a host infection group has been observed in relation to soil depth (Nalin et al 1997). Considering the diVerence in soil temperature and moisture between our A. tenuifolia habitats, and the greater vertical soil development and more complex vertical structure of FPL than FPE soils, these factors may also have contributed to the diVerences we observed in symbiotic Frankia structure.…”

Section: Discussionmentioning

confidence: 65%

Host species and habitat affect nodulation by specific Frankia genotypes in two species of Alnus in interior Alaska

et al. 2009

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Alders (Alnus spp.) are important components of northern ecosystems due to their ability to fix nitrogen (N) in symbiosis with Frankia bacteria. Availability of optimal Frankia may be a contributing factor in limiting the performance and ecological effects of Alnus, but the factors underlying distribution of Alnus-infective Frankia are not well understood. This study examined the genetic structure (nifD-K spacer RFLP haplotypes) of Frankia assemblages symbiotic with two species of Alnus (A. tenuifolia and A. viridis) in four successional habitats in interior Alaska. We used one habitat in which both hosts occurred to observe differences between host species independent of habitat, and we used replicate sites for each habitat and host to assess the consistency of symbiont structure related to both factors. We also measured leaf N content and specific N-fixation rate (SNF) of nodules ((15)N uptake) to determine whether either covaried with Frankia structure, and whether Frankia genotypes differed in SNF in situ. Frankia structure differed between sympatric hosts and among habitats, particularly for A. tenuifolia, and was largely consistent among replicate sites representing both factors. Leaf N differed between host species and among habitats for both hosts. SNF did not differ among habitats or host species, and little evidence for differences in SNF among Frankia genotypes was found, due largely to high variation in SNF. Consistency of Frankia structure among replicate sites suggests a consistent relationship between both host species and habitat among these sites. Correlations with specific environmental variables and possible underlying mechanisms are discussed.

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“…The results obtained by Zimpfer et al (2001Zimpfer et al ( , 2003 suggested the positive role of soil microbiota with respect to Frankia and Casuarina nodulation and performance. (2000), Caravaca et al (2002), Diem and Dommergues (1990), Dommergues (1997), Dutta and Agrawal (2001), Facelli et al (1999), Fleming et al (1988, Girgis et al (1992), Gonzalez and Seastdt (2001), Izquierdo et al (2005), Jamaludheen and Kumar (1999), Kahindi et al (1997), Parrotta (1999, Rajendran (2001), Rajendran and Devaraj (2004), Reddell et al (1986a, b;, Sanginga et al (1989), Sayed et al (1997Sayed et al ( , 2000Sayed et al ( , 2002aSayed et al ( , b, 2006Sayed et al ( , 2008, Schwencke and Caru (2001), Shetty et al (1994), Slattery and Surapaneni (2002), Tomar et al (2003), Tian et al (2002), Warren and Zou (2002), Zhang et al (2006), and Zhong et al (2010)). (1), (2), (3), (4), (5) represent the alleviation methods compiled from the available literature leading to higher efficiency of nitrogen fixation and higher plant growth (the relation between different factors are illustrated by dashed arrows) as follows: (1) Addition of organic soils, recycling organic matter, leaving the top soil layer with litterfall undisturbed, fertilization (especially with phosphorus).…”

Section: Beneficial Effects Of Frankia Other Biofertilizers and Soimentioning

confidence: 99%

“…Type of inoculum, soil temperature, moisture, and phosphorus content, plus other factors, are very important for Casuarina nodulation and effective nitrogen fixation by Frankia (Sayed et al 1997(Sayed et al , 2006Dawson 2008). It was reported that arid environments may have smaller sets of infective Frankia (Benson et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Improving Casuarina growth and symbiosis with Frankia under different soil and environmental conditions—review

Sayed

2011

Folia Microbiol

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Casuarinas are very important plants for their various uses and survival in adverse sites or harsh environments. As nitrogen fixation, in symbiosis with Frankia, is an important factor for the survival of these plants under various conditions, the basis for selecting both effective and tolerant Frankia strains and Casuarina spp., are provided. Enhancement of the symbiotic relationship between Frankia and Casuarina, by mycorrhizal infection and other biofertilizing microorganisms such as Bacillus and Azospirillum, is reflected by superior plant growth. Casuarina leaf litter is also a great source for both inorganic and organic nutrients. Therefore, careful management of the top soil layer under Casuarina trees is very important. Litter decomposition ratio is affected by many physical chemical and biological factors including temperature, moisture conditions, lignin, and C-to-N and N-to-P ratios in addition to soil biota. In general, here the above relations are discussed and an alleviation model is presented for important disturbances of natural and human origin made in soil and environment, especially in the dry regions. In conclusion, we suggest how to optimize the nitrogen fixation and plant growth under the prevalent conditions.

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Effect of temperature and soil moisture on the survival and symbiotic effectiveness of Frankia spp.

Cited by 22 publications

References 12 publications

Growth responses of indigenous Frankia populations to edaphic factors in actinorhizal rhizospheres

Growth responses of indigenous Frankia populations to edaphic factors in actinorhizal rhizospheres

Host species and habitat affect nodulation by specific Frankia genotypes in two species of Alnus in interior Alaska

Improving Casuarina growth and symbiosis with Frankia under different soil and environmental conditions—review

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