Plant type differently promote the arbuscular mycorrhizal fungi biodiversity in the rhizosphere after revegetation of a degraded, semiarid land

Alguacil, M.M.; Torres, M.P.; Torrecillas, E.; Díaz, G.; Roldán, A.

doi:10.1016/j.soilbio.2010.09.029

Cited by 90 publications

(49 citation statements)

References 44 publications

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“…Glo G3 was the most frequent and abundant OTU in both terrestrial and epiphytic root samples. In previous research conducted in other Mediterranean semiarid environments, this OTU was also the most abundant in the roots of the analyzed plants (32,33). Hence, Glo G3 appears to be an AMF of great plasticity that is well adapted to the environmental conditions prevailing in semiarid areas and which shows the ability to colonize many different plant species and contrasting habitats.…”

Section: Discussionsupporting

confidence: 49%

Influence of Habitat and Climate Variables on Arbuscular Mycorrhizal Fungus Community Distribution, as Revealed by a Case Study of Facultative Plant Epiphytism under Semiarid Conditions

Torrecillas

Torres

Alguacil

et al. 2013

Appl Environ Microbiol

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bIn semiarid Mediterranean ecosystems, epiphytic plant species are practically absent, and only some species of palm trees can support epiphytes growing in their lower crown area, such as Phoenix dactylifera L. (date palm). In this study, we focused on Sonchus tenerrimus L. plants growing as facultative epiphytes in P. dactylifera and its terrestrial forms growing in adjacent soils. Our aim was to determine the possible presence of arbuscular mycorrhizal fungi (AMF) in these peculiar habitats and to relate AMF communities with climatic variations. We investigated the AMF community composition of epiphytic and terrestrial S. tenerrimus plants along a temperature and precipitation gradient across 12 localities. Epiphytic roots were colonized by AMF, as determined by microscopic observation; all of the epiphytic and terrestrial samples analyzed showed AMF sequences from taxa belonging to the phylum Glomeromycota, which were grouped in 30 AMF operational taxonomic units. The AMF community composition was clearly different between epiphytic and terrestrial root samples, and this could be attributable to dispersal constraints and/or the contrasting environmental and ecophysiological conditions prevailing in each habitat. Across sites, the richness and diversity of terrestrial AMF communities was positively correlated with rainfall amount during the most recent growing season. In contrast, there was no significant correlation between climate variables and AMF richness and diversity for epiphytic AMF communities, which suggests that the composition of AMF communities in epiphytic habitats appears to be largely determined by the availability and dispersion of fungal propagules from adjacent terrestrial habitats. E piphytism is a characteristic life form of humid and perhumid tropical forest, especially those at middle and higher elevations denominated montane cloud forest. In Mediterranean ecosystems, epiphytic vegetation is restricted to some mesic habitats in temperate regions where ferns, lichens, and bryophytes are common as epiphytes on the trunks of living trees. In semiarid Mediterranean ecosystems, characterized by low irregular annual rainfall and high temperatures (mild winter temperatures and hot summer), epiphytic plant species are practically absent. Actually, under these semiarid environmental conditions, only some species of palm trees can support epiphytes growing in their lower crown area, such as Phoenix canariensis (1), which is restricted to gardens, or Phoenix dactylifera (date palm), which is widely cultivated and frequently naturalized (2). In date palms the armpits of cut leafs form a good mechanical support place for epiphyte establishment and growth and also constitute an enabling environment for the accumulation of water and organic matter. Although several plant species can eventually be found as facultative epiphytes (epiphytes that can inhabit the canopy or ground interchangeably (3), the most common species and almost always present growing on date palm trunks is Sonchus tenerrimus L., a wi...

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Section: Discussionsupporting

confidence: 49%

Influence of Habitat and Climate Variables on Arbuscular Mycorrhizal Fungus Community Distribution, as Revealed by a Case Study of Facultative Plant Epiphytism under Semiarid Conditions

Torrecillas

Torres

Alguacil

et al. 2013

Appl Environ Microbiol

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“…Thanks to its very developed root system and its characteristics to establish myccorhyzal symbiotic associations, this species ensures the stabilization of dunes, the soil fixing in the arid and semi-arid ecosystems [4,5] and the amelioration of the fertility of damaged and eroded soils [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effects of temperature and salinity on the seeds germination of <i>Retama raetam</i> (FORSSK.) Webb. scarified with sulfuric acid

Mehdadi

Bendimered

Dadach

et al. 2017

J. Fundam and Appl Sci.

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“…Ces espèces présentent des caractéristiques qui leur permettent de s'adapter aux conditions de xéro-phytisme telles que la très forte régression de la surface foliaire, la présence de stomates dans des cryptes entourées de poils contribuant à la réduction de l'évaporation et un système racinaire développé pour puiser l'eau nécessaire à leur survie (Hatimi, 1995). Leur intérêt écologique réside dans la stabilisation des dunes, la fixation des sols et la reconstitution du couvert végétal des écosystèmes semi-arides et arides (Caravaca et al, 2003 ;Espigares et al, 2004 ;Djabeur Kaid-Harche et al, 2007 ;Alguacil et al, 2011 ;Munoz Vallés et al, 2011). Par ailleurs, ces espèces ont la propriété d'établir des associations symbiotiques mycorhiziennes favorisant la biofertilisation des sols salins et pauvres dans lesquels elles prospèrent (Hatimi, 1995 ;Mosbah et al, 2008).…”

Section: Introductionunclassified

Effets de quelques prétraitements physico—chimiques sur la levée de l'inhibition tégumentaire des graines deRetama monospermaBoiss. et recherches des conditions thermiques optimales de germination

Bouredja¹,

Mehdadi²,

Bendimered³

et al. 2011

Acta Botanica Gallica

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Résumé.-Les graines de Retama monosperma sont affectées d'une inhibition tégumentaire qui empêche leur germination dans les conditions naturelles. Au laboratoire, cette germination est déclenchée après scarification chimique des graines par l'acide sulfurique pur, dans une gamme de températures se situant entre 10 °C et 30 °C. L'analyse en composantes principales des données relatives aux capacités de germination, aux coefficients de vélocité et aux temps de latence obtenus, après prétraitement à l'acide sulfurique pendant 4, 6 et 8 heures, aux différentes températures testées, montrent que l'optimum thermique de germination se situe entre 20 °C et 25 °C. En effet, à ces deux températures, nous avons enregistré les meilleurs coefficients de vélocité (23.25% à 31.81%), les capacités de germination (72% à 92%) et les temps de latence les plus courts (1 à 2 jours).Mots clés : germination -scarification chimique -Retama monosperma -inhibition tégumentaire.Abstract.-Seeds of Retama monosperma are affected by integumentary inhibition preventing their germination in the natural conditions. In the laboratory, the germination is triggered after chemical scarification of seeds by undiluted sulfuric acid, in a range of temperatures, between 10 °C and 30 °C. The principal component analysis of data relating to the capacity of germination, coefficients of velocity and latency time obtained after pretreatment with sulfuric acid for 4, 6 and 8 hours, tested at different temperatures, show that the optimum thermal germination is between 20 °C and 25 °C. Indeed, at these two temperatures, we recorded the best coefficients of velocity (23.25% to 31.81%), germination capacity (72% to 92%) and the shortest latency time (1 to 2 days).

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Plant type differently promote the arbuscular mycorrhizal fungi biodiversity in the rhizosphere after revegetation of a degraded, semiarid land

Cited by 90 publications

References 44 publications

Influence of Habitat and Climate Variables on Arbuscular Mycorrhizal Fungus Community Distribution, as Revealed by a Case Study of Facultative Plant Epiphytism under Semiarid Conditions

Influence of Habitat and Climate Variables on Arbuscular Mycorrhizal Fungus Community Distribution, as Revealed by a Case Study of Facultative Plant Epiphytism under Semiarid Conditions

Effects of temperature and salinity on the seeds germination of <i>Retama raetam</i> (FORSSK.) Webb. scarified with sulfuric acid

Effets de quelques prétraitements physico—chimiques sur la levée de l'inhibition tégumentaire des graines deRetama monospermaBoiss. et recherches des conditions thermiques optimales de germination

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