Do endophytic fungi grow through their hosts systemically?

Yan, Jvfen; Broughton, Sue; Yang, Shengchao; Gange, Alan C.

doi:10.1016/j.funeco.2014.07.005

Cited by 88 publications

(82 citation statements)

References 50 publications

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“…It should be noted that the endophyte community within plants in Phase 1 and in plants grown in control soil in Phase 2 was almost identical. The main source of infection by endophytes is likely to be spore rain from the air, causing many localised infections, but not resulting in systemic growth (Yan et al ., ). Furthermore, infection of seedlings within soils seems not to occur either (Currie et al ., ), supporting the idea that foliar colonisation occurs exclusively by an aerial route.…”

Section: Discussionmentioning

confidence: 97%

Positive plant–soil feedbacks of the invasive Impatiens glandulifera and their effects on above‐ground microbial communities

et al. 2016

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Summary Impatiens glandulifera is one of the most widespread invasive plant species in the UK. Although aspects of its biology are known, there is little information about its association with microbial communities, both above ground and below ground. Furthermore, it is unknown whether this species exhibits any form of plant–soil feedback (PSF), commonly seen in other invasive weeds. We conducted a PSF experiment, in which plants of I. glandulifera were grown in soil that supported the species and compared with plants grown in a control soil from the same locality. Soil nutrients were measured, and the soil and foliar microbial communities were assessed. Impatiens glandulifera grew larger and faster in conditioned soil compared with the control. Higher levels of phosphate were also found in conditioned soils. Arbuscular mycorrhizal fungal (AMF) colonisation was lower in conditioned soils, suggesting that I. glandulifera may rapidly alter AMF communities in invaded areas. PSFs had a significant effect on the foliar endophyte community, with clear separation of species between conditioned and control soils. These results show that I. glandulifera displayed a positive PSF and the PSF mechanism extended beyond the soil microbial community to affect foliar endophytes. The observed increase in endophytes in plants grown in conditioned soil could enhance resistance to herbivory, thus further accentuating the invasive properties of this species.

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Section: Discussionmentioning

confidence: 97%

Positive plant–soil feedbacks of the invasive Impatiens glandulifera and their effects on above‐ground microbial communities

et al. 2016

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“…Since relatively few pathogens are systemic and vertically (seed) transmitted (Mitchell and Power, 2003), most natural host plants experience a release from pathogens outside the native range. Similarly, endophytic, disease-modifying symbionts are, by and large, also non-systemic and horizontally transmitted (Yan et al, 2015; Table 3), so they too should be left behind in the native range. Unless vertically transmitted, modifiers of a disease should be http://dx.doi.org/10.1016/j.foreco.2014.11.010 0378-1127/Ó 2014 Elsevier B.V. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

The frequency of modification of Dothistroma pine needle blight severity by fungi within the native range

Ridout

Newcombe

2015

Forest Ecology and Management

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“…However, there is not enough scientific evidence supporting the systemic mode of infection by the other endophytic fungi. A very recent study by Yan et al (2015) reported that endophytic fungi rarely grow systemically within plants; rather they produce different metabolites having systemic effects on plants and other microbial plant inhabitants.…”

Section: Major Findingsmentioning

confidence: 99%

Investigation of the fungi associated with dieback of prickly acacia (Vachellia nilotica subsp. indica) in Northern Australia

Haque¹

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Prickly acacia (Vachellia nilotica subsp. indica), one of the most harmful weeds of the Australian rangelands, has been occasionally observed displaying natural dieback symptoms since 1970's.More recently in 2010, a prominent widespread dieback event was observed among the plants growing around Richmond and Julia Creek in north-western Queensland. Affected plants were found with disease symptoms such as; ashy internal staining, defoliation, blackening of shoot tips through to widespread plant mortality. It was hypothesized that a pathogenic fungus/i could be implicated with this phenomenon and a potential for biological control of this invasive species might ensue.Fungi isolated from dieback-affected and healthy stands of prickly acacia were putatively identified by partial sequencing of the Internal Transcribed Spacer (ITS) region of genomic DNA.Botryosphaeriaceae was the best represented family of fungi associated with dieback. Among the Botryosphaeriaceae fungi, Cophinforma was found to be the most prevalent genus with 60% of the total isolates identified as Cophinforma spp. following BLAST searches. Cophinforma was also isolated from the healthy plants growing in the trial site at Richmond. Natural dieback on prickly acacia was previously observed in the surrounding areas. Phylogenetic analysis of the ITS sequences revealed the potential existence of new species of Cophinforma in Australia. Apart from Cophinforma sp., a range of other Botryosphaeriaceae and non-Botryosphaeriaceae fungi were isolated from both dieback-affected and healthy prickly acacia plants growing at different locations.Based on a seedling pathogenicity screening, a sub-set of 40 potentially pathogenic isolates across the range of species were selected to challenge the juvenile plants following a stem inoculation technique under glasshouse conditions. In the glasshouse trials, the test-isolates of Cophinforma sp.(isolated from both dieback-affected and healthy prickly acacia) and an isolate of Lasiodiplodia pseudotheobromae strain NT039 (isolated from dieback-affected Parkinsonia aculeata) consistently caused significant stem lesions, gummosis and leaf mortality. Cophinforma sp., Fusarium acuminatum, Neofusicoccum parvum and Tiarosporella graminis isolated from healthy prickly acacia also caused similar symptoms in glasshouse inoculation trials. The remaining species tested in the glasshouse trials were mostly non-pathogenic to the juvenile plants.In another study, given the observation that several fungi are often isolated from a single piece of dieback-affected stem, it was investigated whether typical dieback symptoms in prickly acacia could be replicated with combinations of different fungi. Therefore, the effect of inoculating with iii two isolates of Cophinforma sp. and one isolate of L. pseudotheobromae singly and in combination under glasshouse and field conditions was tested. In the glasshouse trial, significant stem lesions were observed with each of the test-isolates and their combinations. However, there was no signifi...

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Do endophytic fungi grow through their hosts systemically?

Cited by 88 publications

References 50 publications

Positive plant–soil feedbacks of the invasive Impatiens glandulifera and their effects on above‐ground microbial communities

Positive plant–soil feedbacks of the invasive Impatiens glandulifera and their effects on above‐ground microbial communities

The frequency of modification of Dothistroma pine needle blight severity by fungi within the native range

Investigation of the fungi associated with dieback of prickly acacia (Vachellia nilotica subsp. indica) in Northern Australia

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