Mycorrhizal ecology on serpentine soils

Southworth, Darlene; Tackaberry, Linda E.; Massicotte, Hugues B.

doi:10.1080/17550874.2013.848950

Cited by 15 publications

(7 citation statements)

References 65 publications

(85 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even though there are several studies on bacterial influence on heavy metal uptake in soil, very few have focussed on fungi. However, studies have reported the effect of mycorrhizal fungi on heavy metal uptake; uptake by mycorrhizal fungi depends on plant growth conditions, the fungal partner, heavy metal and amount of metal present in soil (Weissenhorn et al 1995;Southworth et al 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Because of generally low organic matter and clay content (Proctor and Woodell 1975), serpentine soils often have a low water-holding capacity. Because of the high heavy metal concentrations, the microbial diversity is often low compared with non-serpentine soils (Panaccione et al 2001;Southworth et al 2014). Infertility, metal toxicity, and often sandy, rocky and shallow soils combined with low microbial diversity contribute to unique plant communities consisting of many rare and endemic species (Harrison and Rajakaruna 2011).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A preliminary study of the role of bacterial–fungal co-inoculation on heavy metal phytotoxicity in serpentine soil

Seneviratne

Madawala

et al. 2015

Aust. J. Bot.

View full text Add to dashboard Cite

This study was conducted to understand the role of bacterial-fungal interactions on heavy metal uptake by Zea mays plants. A pot experiment was conducted for 90 days with Z. mays in serpentine soil inoculated with a Gramnegative bacterium, fungus (Aspergilllus sp.) and both microbes to determine the effects of inoculation on nickel, manganese, chromium and cobalt concentrations in plant tissue and soil. Soil nutrients and soil enzyme activities were measured to determine the effect of inoculations on soil quality. Inoculation of microorganisms increased shoot and root biomass, and the maximum biomass was in the bacterial-fungal inoculation. This could be due to the solubilisation of phosphate and production of indole acetic acid. Although the combination treatment contributed to an increase in heavy metal uptake in Z. mays plants, the lowest translocation was observed in the combination treatment. Moreover, the soil available nitrogen, available phosphorous and total organic carbon content were increased with the microbial inoculation. Similarly, the soil dehydrogenase activity was higher as a result of microbial inoculation, whereas the highest dehydrogenase activity was reported in the combination inoculation. This study confirms the synergistic effect of bacterial-fungal inoculation as a soil-quality enhancer and as a plant-growth promoter in the presence of heavy metals.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A preliminary study of the role of bacterial–fungal co-inoculation on heavy metal phytotoxicity in serpentine soil

Seneviratne

Madawala

et al. 2015

Aust. J. Bot.

View full text Add to dashboard Cite

show abstract

“…Specialization in plant host-symbiont-soil interactions may also facilitate plant adaptation to edaphic stress and subsequent specialization (see Table 2 in Van Nuland, 2016). Arbuscular mycorrhizal fungi (AMF) are common root symbionts that can increase a plant hosts' establishment and growth in edaphically-stressful environments (Palacio et al, 2012;Schechter & Branco, 2014;Southworth et al, 2014). There are plant and microbial symbionts that enhance plant adaptation to edaphic stress (Thrall et al, 2007), showing that co-adapted interactions may play a role in edaphic specialization.…”

Section: Do Interactions With Herbivores or Microbes Drive The Evolutmentioning

confidence: 99%

Lessons on Evolution from the Study of Edaphic Specialization

Rajakaruna

2017

Bot. Rev.

103

View full text Add to dashboard Cite

Plants adapted to special soil types are ideal for investigating evolutionary processes, including maintenance of intraspecific variation, adaptation, reproductive isolation, ecotypic differentiation, and the tempo and mode of speciation. Common garden and reciprocal transplant approaches show that both local adaptation and phenotypic plasticity contribute to edaphic (soil-related) specialization. Edaphic specialists evolve rapidly and repeatedly in some lineages, offering opportunities to investigate parallel evolution, a process less commonly documented in plants than in animals. Adaptations to soil features are often under the control of major genes and they frequently have direct or indirect effects on genes that contribute to reproductive isolation. Both reduced competitiveness and greater susceptibility to herbivory have been documented among some edaphic specialists when grown in 'normal' soils, suggesting that a high physiological cost of tolerance may result in strong divergent selection across soil boundaries. Interactions with microbes, herbivores, and pollinators influence soil specialization either by directly enhancing tolerance to extremes in soil conditions or by reducing gene flow between divergent populations. Climate change may further restrict the distribution of edaphic specialists due to increased competition from other taxa or, expand their ranges, if preadaptations to drought or other abiotic stressors render them more competitive under a novel climate.

show abstract

“…Although both populations were able to perform similarly in serpentine soils in the short term (21 days), there was a significant difference in both above-and below-ground biomass in the serpentine population growing in serpentine soils under longterm (4 months) exposure, compared with the non-serpentine population. The lower biomass seen in the non-serpentine population when grown in serpentine soils may not be due only to Ni and other metal toxicity, but also to the deficiency of essential nutrients such as N, P, K, and Ca and moisture stress often characterising serpentine soil (Rajakaruna and Baker 2004;Alexander et al 2007) or changes in the beneficial microbiota in the two soils (Southworth et al 2014). Decreases in both above-and below-ground biomass when exposed to serpentine soils can have a significant influence on competitive ability (Moore and Elmendorf 2011) as well as reproductive fitness (Ghasemi et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Growth and nickel uptake by serpentine and non-serpentine populations of Fimbristylis ovata (Cyperaceae) from Sri Lanka

Chathuranga¹,

Dharmasena²,

Rajakaruna³

et al. 2015

Aust. J. Bot.

View full text Add to dashboard Cite

Compared with serpentine floras of Southeast Asia, the serpentine vegetation of Sri Lanka is impoverished in regard to serpentine endemics and nickel hyperaccumulators. All species so far documented from the serpentine outcrops of Sri Lanka also have non-serpentine populations; it is unclear whether the serpentine populations are physiologically distinct and deserve ecotypic recognition. We conducted a preliminary study to examine whether serpentine and non-serpentine populations of Fimbristylis ovata represent locally adapted ecotypes by investigating their growth and potential for nickel uptake and tolerance under greenhouse conditions. Although both populations of F. ovata showed a similar growth pattern in serpentine soil during short-term exposure (21 days), the non-serpentine population was unable to survive in serpentine soil under long-term exposure (4 months). Both populations were able to uptake nickel from serpentine soil during short-term exposure (21 days). The serpentine population, however, translocated significantly more nickel from its roots to shoots (translocation factor 0.43) than the non-serpentine population (translocation factor 0.29). Our preliminary investigations suggest that the serpentine and non-serpentine populations of F. ovata may be locally adapted to their respective soils. However, additional studies are required to determine whether the populations deserve ecotypic recognition.

show abstract

Mycorrhizal ecology on serpentine soils

Cited by 15 publications

References 65 publications

A preliminary study of the role of bacterial–fungal co-inoculation on heavy metal phytotoxicity in serpentine soil

A preliminary study of the role of bacterial–fungal co-inoculation on heavy metal phytotoxicity in serpentine soil

Lessons on Evolution from the Study of Edaphic Specialization

Growth and nickel uptake by serpentine and non-serpentine populations of Fimbristylis ovata (Cyperaceae) from Sri Lanka

Contact Info

Product

Resources

About