Soil Microbial Population in the Vicinity of the Bean Caper (Zygophyllum dumosum) Root Zone in a Desert System

Shmueli, I.; Barness, G.; Steinberger, Yosef

doi:10.1016/s1002-0160(07)60091-5

Cited by 7 publications

(2 citation statements)

References 23 publications

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“…Likewise, the nutrient interception in the rhizosphere is also stronger in desert soil (Huang et al, 2016 ). The characteristics of rhizosphere soils may thus be one of the most direct ways in which desert plants utilize nutrients and adapt to harsh environment (Cao et al, 2016 ; Shmueli et al, 2007 ). Therefore, comparing the rhizosphere effects of two Haloxylon species on soil chemical and microbial properties can better understand the possible role of soil microorganisms in their habitat heterogeneity from a nutrient perspective.…”

Section: Introductionmentioning

confidence: 99%

Soil microbial community shifts explain habitat heterogeneity in two Haloxylon species from a nutrient perspective

Tang

Ikenaga

et al. 2023

Ecology and Evolution

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Haloxylon ammodendron and Haloxylon persicum (as sister taxa) are dominant shrubs in the Gurbantunggut Desert. The former grows in inter‐dune lowlands while the latter in sand dunes. However, little information is available regarding the possible role of soil microorganisms in the habitat heterogeneity in the two Haloxylon species from a nutrient perspective. Rhizosphere is the interface of plant–microbe–soil interactions and fertile islands usually occur around the roots of desert shrubs. Given this, we applied quantitative real‐time PCR combined with MiSeq amplicon sequencing to compare their rhizosphere effects on microbial abundance and community structures at three soil depths (0–20, 20–40, and 40–60 cm). The rhizosphere effects on microbial activity (respiration) and soil properties had also been estimated. The rhizospheres of both shrubs exerted significant positive effects on microbial activity and abundance (e.g., eukarya, bacteria, and nitrogen‐fixing microbes). The rhizosphere effect of H. ammodendron on microbial activity and abundance of bacteria and nitrogen‐fixing microbes was greater than that of H. persicum . However, the fertile island effect of H. ammodendron was weaker than that of H. persicum . Moreover, there existed distinct differences in microbial community structure between the two rhizosphere soils. Soil available nitrogen, especially nitrate nitrogen, was shown to be a driver of microbial community differentiation among rhizosphere and non‐rhizosphere soils in the desert. In general, the rhizosphere of H. ammodendron recruited more copiotrophs (e.g., Firmicutes, Bacteroidetes, and Proteobacteria), nitrogen‐fixing microbes and ammonia‐oxidizing bacteria, and with stronger microbial activities. This helps it maintain a competitive advantage in relatively nutrient‐rich lowlands. Haloxylon persicum relied more on fungi, actinomycetes, archaea (including ammonia‐oxidizing archaea), and eukarya, with higher nutrient use efficiency, which help it adapt to the harsher dune crests. This study provides insights into the microbial mechanisms of habitat heterogeneity in two Haloxylon species in the poor desert soil.

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Section: Introductionmentioning

confidence: 99%

Soil microbial community shifts explain habitat heterogeneity in two Haloxylon species from a nutrient perspective

Tang

Ikenaga

et al. 2023

Ecology and Evolution

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“…These adaptations have been found to strongly affect abiotic conditions such as soil organic matter, nutrients, and salinity at the base of desert shrubs and to influence the activity, quantity, and diversity of soil microorganisms (Berg and Steinberger, 2008;Garcia-Moya and McKell, 1970;He et al, 2002;Sarig and Steinberger, 1994;Saul-Tcherkas and Steinberger, 2009;Schlesinger and Pilmanis, 1998;Shmueli et al, 2007;Thompson et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Vertical distribution of soil microbial biomass and its association with shrubs from the Negev Desert

Steinberger

2012

Journal of Arid Environments

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Are Biological Effects of Desert Shrubs More Important than Physical Effects on Soil Microorganisms?

Berg

Steinberger

2009

Microb Ecol

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Vegetation cover plays a major role in providing organic matter and in acting as a physical barrier, with both together contributing to the formation of "fertile islands," which play an active role in prolonging biological activity in desert ecosystems. By undertaking this study, a longterm research, we designed an experiment to separate the two components-the physical and biotic parts of the perennial plants-and to identify the factor that contributes the most to the ecosystem. The study site was located in the northern Negev Desert, Israel, where 50 Hammada scoparia shrubs and 50 artificial plants were randomly marked. Soil samples were collected monthly over 3 years of research at three locations: under the canopy of H. scoparia shrubs, in the vicinity of the artificial plants, and between the shrubs (control). The contribution to microbial activity was measured by evaluation of the microbial community functions in soil. The functional aspects of the microbial community that were measured were CO2 evolution, microbial biomass, microbial functional diversity, and the physiological profile of the community. The results of this study are presented in two ways: (1) according to the three locations/treatments; and (2) according to the phenological situation of the vegetation (annual and perennial plants) in the research field: the growing phase, the drying process, and the absence of annual plants. The only parameters that were found to affect microbial activity were the contribution of the organic matter of perennial shrubs and the growth of vegetation (annual and perennial) during the growing seasons. The physical component was found to have no effect on soil microbial functional diversity, which elucidates the important contribution of the desert shrub in enhancing biological multiplicity and activity.

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Soil Microbial Population in the Vicinity of the Bean Caper (Zygophyllum dumosum) Root Zone in a Desert System

Cited by 7 publications

References 23 publications

Soil microbial community shifts explain habitat heterogeneity in two Haloxylon species from a nutrient perspective

Soil microbial community shifts explain habitat heterogeneity in two Haloxylon species from a nutrient perspective

Vertical distribution of soil microbial biomass and its association with shrubs from the Negev Desert

Are Biological Effects of Desert Shrubs More Important than Physical Effects on Soil Microorganisms?

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