Effects of heavy metals and acid irrigation on the birch rust, Melampsoridium betulinum

Helander, Marjo

doi:10.1111/j.1439-0329.1994.tb00983.x

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…Nevertheless, no correlation among pathogenic RIF and air quality was observed. Some pathogenic fungi that cause specific diseases are favoured by pollutants presence, and they produce a stimulatory effect increasing the disease incidence (Helander 1994;Magan et al 1995). It was previously reported that some tree endophytes are mostly harmless colonizers of healthy plant tissues.…”

Section: Discussionmentioning

confidence: 99%

“…Regarding pathogenic infections, there is not a homogeneous effect of air pollutants on plant diseases. Some pathogenic fungi that cause specific diseases are favoured by pollutants presence, and they produce a stimulatory effect increasing the disease incidence (Helander 1994;Magan et al 1995). Conversely, the incidence of some diseases is decreased by the presence of pollutants, producing an inhibitory effect (Wani et al 1997;Khan et al 1998).…”

Section: Discussionmentioning

confidence: 99%

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Presence of fungi inScots pine needles found to correlate with air quality as measured by bioindicators in northernSpain

Romeralo

Santiago

2012

Forest Pathology

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Atmospheric pollution has increased worldwide during the last decades affecting forest ecosystems. Thermal power plants give off high levels of contaminants, which can damage forest health. Bioindicators can be helpful tools used for evaluating environment changes by giving an accurate measure of the extent of pollution. The focus of this study was to analyse fungal mycoflora in Pinus sylvestris stands near a thermal power plant and the possible correlation between the presence of the fungi and the air quality as measured by lichens and mosses. Fungi associated with pine needles were selected as subjects of this study because of their phytopathological importance and association with the pine trees' decline. Samples for this study were selected from eight plots in close proximity to a thermal power station in northern Spain. Symptoms of decline were previously observed in all the plots before sampling was performed. Lichens were used as bioindicators of environmental quality in two ways, first using the Index of Atmospheric Purity and second through categorization of lichen species based on their sensitivity. In addition, botanical quality was measured regarding the presence or absence of mosses. With two seasonal samplings (autumn and spring) and the use of four types of pine needle plant material (green needles, dried needles, half-green, half-dried needles and fallen needles), both endophytes and epiphytes present in the needles were isolated and observed. Thirty fungal species in total were identified of the 1095 isolates obtained. Furthermore, significant differences in fungal isolates were observed between seasons and among the different plant material. Results showed that both environmental air quality and botanical quality were negatively correlated with the relative isolation frequency of fungi. The higher number of isolates was attributed to a possible infection produced by fungi, which could be a leading factor in the trees' decline.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Presence of fungi inScots pine needles found to correlate with air quality as measured by bioindicators in northernSpain

Romeralo

Santiago

2012

Forest Pathology

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“…The isolation of endophytic fungi was done following the protocol described by Helander et al (1994) with some slight modifications. The fragments obtained were washed with sterile distilled water, treated with ethanol (70%) for 2 min followed by rinsing with sterile distilled water.…”

Section: Isolation Of Endophytic Fungimentioning

confidence: 99%

Antibacterial potential of some Cameroonian ornamental plants and their isolated endophytic fungi

Lacmata¹,

Guy-Bertrand²,

Karimo³

et al. 2022

Int. J. Curr. Res. Biosci. Plant Biol.

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Bacterial resistance to antibiotics is a real challenge for health practitioners and society in general today, bringing a constant need for the search for new molecules. The present study is focused on the antibacterial effect of extracts of three ornamental plants and their endophytes. The endophytic fungi isolated from the ornamental plants included Sansevieria trifasciata leaves, Monstera deliciosa fruits, Monstera deliciosa and Cordyline fruticosa roots. The morphocultural features were studied, the antibacterial activities of the endophytes as well as those of their host plant extracts were determined through the agar diffusion and broth microdilution methods. The plant extracts were obtained by ethanol maceration, while those from the endophytes were obtained by ethyl acetate depletion. Phytochemical screening of the different extracts was done using standard methods. Four endophytes were isolated from the three plants: Geotrichum sp. from the leaves of Sansevieria trifasciata; Colletotrichum sp. and Rhizopus sp. from the roots of Cordyline fruticosa and Monstera deliciosa respectively and Phoma sp. from the fruits of Monstera deliciosa. Endophyte isolates inhibited the growth of almost all the tested bacterial with inhibition diameters ranging from 5 to 40 mm. The host endophytic plant extracts were less active than endophytic extracts, with inhibition diameters ranging from 0 to 20 mm. Some endophytic fungal secretions and plant extracts exhibited antibacterial activities in liquid media, with MICs ranging from 512 to 2048 µg/ml. Finally, endophytic extracts were more active than plant extracts. There was no concordance between the activities of endophytes and those of plant extracts, reflecting their independence.

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Small-scale dynamics of plant communities in an experimentally polluted and fungicide-treated subarctic birch-pine forest

et al. 1999

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Effects of heavy metals and acid irrigation on the birch rust, Melampsoridium betulinum

Cited by 4 publications

References 20 publications

Presence of fungi inScots pine needles found to correlate with air quality as measured by bioindicators in northernSpain

Presence of fungi inScots pine needles found to correlate with air quality as measured by bioindicators in northernSpain

Antibacterial potential of some Cameroonian ornamental plants and their isolated endophytic fungi

Small-scale dynamics of plant communities in an experimentally polluted and fungicide-treated subarctic birch-pine forest

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