Geobotany and Biogeochemistry of Serpentine Soils of Neyriz, Iran

Ghaderian, Seyed Majid; Fattahi, Houshang; Khosravi, Ahmad; Noghreian, Mousa

doi:10.1656/045.016.0502

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…In this study, C. jonthlaspi exhibited sufficient tolerance and translocation ability to accumulate foliar Ni concentrations exceeding 1 g kg −1 without significant reduction in growth, thus demonstrating key physiological characteristics of a hyperaccumulator. To date, Clypeola species have never been recorded as hyperaccumulators in the field, even in two instances when they were collected on serpentine sites where other hyperaccumulators occur [71,72]. It would be inappropriate to classify this species as a Ni hyperaccumulator based on evidence from hydroponic culture alone.…”

Section: Discussionmentioning

confidence: 99%

Intraspecific Variation in Nickel Tolerance and Hyperaccumulation among Serpentine and Limestone Populations of Odontarrhena serpyllifolia (Brassicaceae: Alysseae) from the Iberian Peninsula

Pollard

McCartha

Quintela-Sabarís

et al. 2021

Plants

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Odontarrhena serpyllifolia (Desf.) Jord. & Fourr. (=Alyssum serpyllifolium Desf.) occurs in the Iberian Peninsula and adjacent areas on a variety of soils including both limestone and serpentine (ultramafic) substrates. Populations endemic to serpentine are known to hyperaccumulate nickel, and on account of this remarkable phenotype have, at times, been proposed for recognition as taxonomically distinct subspecies or even species. It remains unclear, however, to what extent variation in nickel hyperaccumulation within this taxon merely reflects differences in the substrate, or whether the different populations show local adaptation to their particular habitats. To help clarify the physiological basis of variation in nickel hyperaccumulation among these populations, 3 serpentine accessions and 3 limestone accessions were cultivated hydroponically under common-garden conditions incorporating a range of Ni concentrations, along with 2 closely related non-accumulator species, Clypeola jonthlaspi L. and Alyssum montanum L. As a group, serpentine accessions of O. serpyllifolia were able to tolerate Ni concentrations approximately 10-fold higher than limestone accessions, but a continuous spectrum of Ni tolerance was observed among populations, with the least tolerant serpentine accession not being significantly different from the most tolerant limestone accession. Serpentine accessions maintained relatively constant tissue concentrations of Ca, Mg, K, and Fe across the whole range of Ni exposures, whereas in the limestone accessions, these elements fluctuated widely in response to Ni toxicity. Hyperaccumulation of Ni, defined here as foliar Ni concentrations exceeding 1g kg−1 of dry biomass in plants not showing significant growth reduction, occurred in all accessions of O. serpyllifolia, but the higher Ni tolerance of serpentine accessions allowed them to hyperaccumulate more strongly. Of the reference species, C. jonthlaspi responded similarly to the limestone accessions of O. serpyllifolia, whereas A. montanum displayed by far the lowest degree of Ni tolerance and exhibited low foliar Ni concentrations, which only exceeded 1 g kg−1 in plants showing severe Ni toxicity. The continuous spectrum of physiological responses among these accessions does not lend support to segregation of the serpentine populations of O. serpyllifolia as distinct species. However, the pronounced differences in degrees of Ni tolerance, hyperaccumulation, and elemental homeostasis observed among these accessions under common-garden conditions argues for the existence of population-level adaptation to their local substrates.

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Section: Discussionmentioning

confidence: 99%

Intraspecific Variation in Nickel Tolerance and Hyperaccumulation among Serpentine and Limestone Populations of Odontarrhena serpyllifolia (Brassicaceae: Alysseae) from the Iberian Peninsula

Pollard

McCartha

Quintela-Sabarís

et al. 2021

Plants

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“…Other species of the genus show tolerance to other kinds of special substrates; in addition to the aforementioned C. mazicum and C. simulans, other species such as C. leiocalycinus Boiss. (Ghaderian et al, 2009) have been recorded on serpentinites and C. lanatus Vahl (El-Ghani & Amer, 2003) has been recorded on gypsum.…”

Section: Relatives: Dolomites Vs Serpentinitesmentioning

confidence: 99%

Variability, genetic structure and phylogeography of the dolomitophilous speciesConvolvulus boissieri(Convolvulaceae) in the Baetic ranges, inferred from AFLPs, plastid DNA and ITS sequences

et al. 2014

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Convolvulus boissieri is an edaphic endemic plant which grows in the Baetic ranges always in association with high mountain xeric dolomitic outcrops. As these dolomitic areas appear in a 'soil-island' pattern, the distribution of this species is disjunct. Populations of this species frequently include a low number of individuals, which could have an important impact on their genetic diversity and viability. Convolvulus boissieri provides an excellent opportunity to study the genetic and phylogeographical aspects of species linked to dolomites. We used amplified fragment length polymorphism markers and nuclear (internal transcribed spacer region of the nuclear ribosomal cistron) and plastid sequences (trnL-trnF, rpl32-trnL and trnQ-5′rps16). Data were generated from 15 populations, representing the distribution area of the species. For sequence analysis and estimation of divergence times we also used sequences from other Convolvulus species. Results revealed low intrapopulational genetic diversity and a strong interpopulational structure. Furthermore, we found clear-cut differentiation caused by the existence of two large population groups separated by the Guadiana Menor river basin. Estimation of divergence times indicated that divergence took place during the Pleistocene glaciations. Genetic diversity and differentiation are similar to those other species exhibiting naturally fragmented distribution with a sky islands pattern. In phylogeographical terms, the successive glaciation-interglaciation cycles caused the species to spread from the western sites to eastern sites, the latter being more exposed to the effects of glaciation.

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Mediterranean Ultramafic (Serpentine) Chaparrals of California (USA): A Geobotanical Overview

Sánchez‐Mata

Rodríguez-Rojo

2016

Vegetation Structure and Function at Multiple Spatial, Temporal and Conceptual Scales

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Geobotany and Biogeochemistry of Serpentine Soils of Neyriz, Iran

Cited by 3 publications

References 12 publications

Intraspecific Variation in Nickel Tolerance and Hyperaccumulation among Serpentine and Limestone Populations of Odontarrhena serpyllifolia (Brassicaceae: Alysseae) from the Iberian Peninsula

Intraspecific Variation in Nickel Tolerance and Hyperaccumulation among Serpentine and Limestone Populations of Odontarrhena serpyllifolia (Brassicaceae: Alysseae) from the Iberian Peninsula

Variability, genetic structure and phylogeography of the dolomitophilous speciesConvolvulus boissieri(Convolvulaceae) in the Baetic ranges, inferred from AFLPs, plastid DNA and ITS sequences

Mediterranean Ultramafic (Serpentine) Chaparrals of California (USA): A Geobotanical Overview

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