Fungal endophyte communities reflect environmental structuring across a Hawaiian landscape

Zimmerman, Naupaka; Vitousek, Peter M.

doi:10.1073/pnas.1209872109

Cited by 316 publications

(294 citation statements)

References 88 publications

(98 reference statements)

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“…Bryant et al (2008) found that Acidobacteria decreased in richness over a change of 1000 m elevation in the Rocky Mountains. Similarly mixed results have been found for Fungi, with evidence for greatest richness at mid-elevations due to range overlap (Bahram et al 2012, Coince et al 2014, Miyamoto et al 2014, lack of change with elevation (Zimmerman and Vitousek 2012, Coince et al 2014, Jarvis et al 2015, decreased richness at higher elevations (Looby et al 2016), or increased richness at higher elevations (Pellissier et al 2014). Fewer studies have examined Archaea, but work on two Japanese mountains found a mid-elevation peak in OTU richness (Singh et al 2012, Singh et al 2016).…”

Section: Controls Over Microbial Richnessmentioning

confidence: 92%

“…Similarly, Zimmerman and Vitousek (2012) found strong changes in fungal endophyte composition along an elevation gradient in Hawai'i, despite sampling from a single host. In contrast with richness, redundancy analysis showed that the factors affecting community composition were highly overlapping across groups.…”

Section: Controls Over Microbial Community Compositionmentioning

confidence: 99%

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Controls of nitrogen cycling evaluated along a well‐characterized climate gradient

Sperber

Chadwick

Casciotti

et al. 2017

Ecology

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Abstract:Changes in species richness along climatological gradients have been instrumental in developing theories about the general drivers of biodiversity. Previous studies on microbial communities along climate gradients on mountainsides have revealed positive, negative and neutral richness trends. We examined changes in richness and composition of Fungi, Bacteria and Archaea in soil along a 50-1000 m elevation, 280-3280 mm/yr precipitation gradient in Hawai'i. Soil properties and their drivers are exceptionally well understood along this gradient. All three microbial groups responded strongly to the gradient, with community ordinations being similar along axes of environmental conditions (pH, rainfall) and resource availability (nitrogen, phosphorus).However, the form of the richness-climate relationship varied between Fungi (positive-linear), Bacteria (unimodal), and Archaea (negative-linear). These differences were related to resourceecology and limiting conditions for each group, with fungal richness increasing most strongly with soil carbon, ammonia-oxidizing Archaea increasing with nitrogen mineralization rate, and Bacteria increasing with both carbon and pH. Reponses to the gradient became increasingly variable at finer taxonomic scales and within any taxonomic group individual OTUs occurred in narrow climate-elevation ranges. These results show that microbial responses to climate gradients are heterogeneous due to complexity of underlying environmental changes and the diverse ecologies of microbial taxa.

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Section: Controls Over Microbial Richnessmentioning

confidence: 92%

Section: Controls Over Microbial Community Compositionmentioning

confidence: 99%

Controls of nitrogen cycling evaluated along a well‐characterized climate gradient

Sperber

Chadwick

Casciotti

et al. 2017

Ecology

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“…The richness of fungal endophyte populations is strictly related to environmental parameters, such as temperature and rain (Hashizume et al 2010, Zimmerman & Vitousek 2012. Recently, it was shown that the composition of leaf-associated fungi on F. sylvatica is correlated primarily with the annual mean temperature (Cordier et al 2012, Coince et al 2014.…”

Section: Discussionmentioning

confidence: 99%

Latent infection of Biscogniauxia nummularia in Fagus sylvatica: a possible bioindicator of beech health conditions

Luchi¹,

Capretti²,

Feducci³

et al. 2016

iForest

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Biscogniauxia nummularia is a xylariaceous fungus known as a common endophyte of European beech, living in plant tissues without development of symptoms, or even inducing strip-cankers and wood decay on trees stressed by drought. We studied the presence of the fungus in apparently healthy beech trees, growing in two different bioclimatic zones characterized by Continental and Mediterranean climates. Asymptomatic twigs were collected in each zone over the season and evaluated for the presence of B. nummularia infections using both cultural and qPCR methods. Results from qPCR indicated differences in the detection of B. nummularia among the seasons and between the study sites. In both sites the highest frequency of detection was in summer. B. nummularia was more frequently detected in the Mediterranean bioclimatic area, where drought is more common. These results suggest that B. nummularia may be a possible bioindicator of beech health stands.

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“…They occur in all lineages of land plants (Stone et al 2000), and reach impressive levels of species diversity within individual plants (Arnold et al 2002). Whereas molecular sequencing methods have enabled major advances in our understanding of endophyte species diversity and distribution Lutzoni 2007, Zimmerman andVitousek 2012), knowledge of their ecological functions lags far behind.…”

Section: Evolutionary Ecology Of Plant-endophyte-pathogen Interactionsmentioning

confidence: 99%

Leaf endophytes and Populus genotype affect severity of damage from the necrotrophic leaf pathogen, Drepanopeziza populi

et al. 2013

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Abstract. Fungal leaf endophytes-nonpathogenic microfungi that live within plant leaves-are ubiquitous in land plants. Leaf endophytes and host plant genotypes may interact to determine plant disease severity. In a greenhouse inoculation experiment, we found that leaf endophyte species and Populus angustifolia genotypes both affected disease outcomes in plants inoculated with the necrotrophic leaf pathogen Drepanopeziza populi. Contrary to many studies showing endophytes conferring defense, all plant genotypes inoculated with the endophyte Penicillium sp. prior to inoculation with the pathogen D. populi were characterized by greater pathogen symptom severity than plants inoculated with the pathogen only. We quantified defense gene expression via qRT-PCR, but found no evidence that increased pathogen damage was related to differential expression of the assayed genes. A second endophyte, Truncatella angustata, which was previously found to reduce symptom severity of the biotrophic pathogen Melampsora in Populus trichocarpa, did not affect symptom severity of the necrotrophic pathogen D. populi or defense gene expression. Overall, our study highlights the variable effects of endophytes on pathogen symptom severity, and illustrates that plant genotypic variation can remain important for disease outcomes even in the presence of endophytes altering disease. Additional work is needed to elucidate the mechanism by which fungal leaf endophytes alter disease in their host plants.

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Fungal endophyte communities reflect environmental structuring across a Hawaiian landscape

Cited by 316 publications

References 88 publications

Controls of nitrogen cycling evaluated along a well‐characterized climate gradient

Controls of nitrogen cycling evaluated along a well‐characterized climate gradient

Latent infection of Biscogniauxia nummularia in Fagus sylvatica: a possible bioindicator of beech health conditions

Leaf endophytes and Populus genotype affect severity of damage from the necrotrophic leaf pathogen, Drepanopeziza populi

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