Occurrence and survival of aquatic hyphomycetes under terrestrial conditons

Sridhar, Kandikere R.; Kaveriappa, K. M.

doi:10.1016/s0007-1536(87)80103-1

Cited by 15 publications

(11 citation statements)

References 11 publications

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“…The occurrence of aquatic hyphomycetes in roots growing in or near water has been demonstrated repeatedly by cultivation methods (e.g., Sati and Belwal, 2005;B€ arlocher, 2006). Molecular barcoding also revealed several aquatic hyphomycetes at greater distance from water: Tetracladium-related sequences were reported in ectomycorrhizal roots (Murat et al, 2005), in the liverwort Marchantia foliacea (Russell and Bulman, 2005), in mycorrhizal orchid roots (Abadie et al, 2006;Elena et al, 2010;Stark et al, 2009), and in ericaceous plants (Tedersoo et al, 2007). Beyond these herbs, aquatic hyphomycetes may be endophytes in trees or ferns (e.g., Fisher and Petrini, 1990;Karamchand and Sridhar, 2009), and next generation sequencing methods have further facilitated their detection (e.g., Tetracladium and Gyoerffyella in Bistorta vivipara roots; Davey et al, 2015).…”

Section: Aquatic Hyphomycetes As Endophytesmentioning

confidence: 97%

“…Multiradiate or sigmoid spores, many of them belonging to common aquatic hyphomycetes, were also produced on leaves collected from the banks of two streams in India (Sridhar and Kaveriappa, 1987), and at terrestrial sites at some distance from streams in Sierra Leone (Singh and Musa, 1977), in Kentucky, Tennessee, Georgia and North Carolina (Dyko, 1976), in Hawaii (Goos, 1978, and in England and Jamaica (Hudson and Sutton, 1964). Bandoni (1974) drew attention to the microlayer, an airewater interface with surface-active substances.…”

Section: Forest Floormentioning

confidence: 99%

“…Another potential habitat colonized by aquatic hyphomycetes is orchids housed in tree canopies. Sequences of Tetracladium were reported in orchid roots of Cephalanthera longifolia and Gymnadenia conopsea in temperate regions (Abadie et al, 2006;Stark et al, 2009). Further, based on ITS analysis, the occurrence of Tetracladium was documented in roots of Orchis militaris in Northern Italy (Elena et al, 2010).…”

Section: Forest Canopy: Phytothelms Stemflow and Throughfallmentioning

confidence: 99%

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Beyond the water column: aquatic hyphomycetes outside their preferred habitat

et al. 2016

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b s t r a c tAquatic hyphomycetes have adapted to running waters by their uncommon conidial shape, which facilitates dispersal as well as adherence to plant substrata. However, they have been early and regularly reported to occur in a variety of environments other than their preferred habitat (e.g., in lentic freshwaters, brackish and marine environments, in terrestrial niches such as stream banks, dew, canopy waters and tree holes). In addition, several aquatic hyphomycetes have adapted to a mutualistic lifestyle which may involve plant defence, as endophytes in leaves, gymnosperm needles, orchids and terrestrial roots.There are several lines of evidence suggesting that aquatic hyphomycetes survive under terrestrial conditions due to their sexual states. Although exhibiting higher diversity in pristine streams, aquatic hyphomycetes can survive environmental stress, e.g., pollution or river intermittency. They also inhabit ground and hyporheic waters, where they appear to be subjected to both physical and physiological selection. Appropriate methods including molecular ones should provide a more comprehensive view of the occurrence and ecological roles of aquatic hyphomycetes outside their preferred habitat.

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Section: Aquatic Hyphomycetes As Endophytesmentioning

confidence: 97%

Section: Forest Floormentioning

confidence: 99%

Section: Forest Canopy: Phytothelms Stemflow and Throughfallmentioning

confidence: 99%

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Beyond the water column: aquatic hyphomycetes outside their preferred habitat

et al. 2016

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“…1993, 1997; Suberkropp 1998). Conidia of a few aquatic hyphomycetes are also found in other habitats such as humid litter and can survive for some time outside the aquatic environment (Sanders & Webster 1978; Bandoni 1981; Sridhar & Kaveriappa 1987; Maamri et al . 1998).…”

Section: Introductionmentioning

confidence: 99%

A fungal endophyte of black spruce (Picea mariana) needles is also an aquatic hyphomycete

et al. 2006

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An aquatic hyphomycete, Dwayaangam sp., was isolated from superficially sterilized black spruce (Picea mariana) needles submerged in aerated water in a small glass chamber (microcosm). The internal transcribed spacer (ITS) sequence of this fungus and of a commonly encountered foliar endophyte isolated from P. mariana showed a high degree of similarity. When sporulation was induced in the microcosm, both the aquatic hyphomycete and the endophyte isolate produced similar aquatic conidia after 30 days, which is longer than previously documented in similar studies. Without the use of molecular tools, the link between the aquatic and endophytic phases of the fungus would have gone unnoticed. This is the first time that a fungal endophyte of conifer needles has been shown to have an aquatic phase. Its presence both as a foliar endophyte and a sporulating aquatic fungus suggests an alternating life cycle between the two environments.

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“…These fungi may persist in canopy during summer and perpetuate in rainy season as evident in dry leaves on the stream banks (Sanders, Webster 1978;Sridhar, Kaveriappa 1987). The live rhizome of Drynaria in Konaje and Sampaje region yielded relatively lowest number of fungi suggests that water-borne hyphomycetes exist in rhizome as endophytes or epiphytes as suggested by Gönczöl and Révay (2003).…”

Section: Resultsmentioning

confidence: 83%

Association of water-borne conidial fungi with epiphytic tree fern (Drynaria quercifolia)

Karamchand

Sridhar

2013

Acta Mycol

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The live and dead tissues, and trapped leaf litter by the epiphytic tree fern Drynaria quercifolia associated with riparian tree species of Konaje (west coast) and Sampaje (Western Ghat) streams of India during dry (summer) and wet (monsoon) seasons yielded 37 species of water-borne conidial fungi on bubble chamber incubation. Dead bracket leaves of fern possess the highest species as well as conidia in Konaje, while the trapped leaf litter in Sampaje. During summer, the diversity was highest in bracket leaves in both locations, while in monsoon season it was highest in rhizomes of Konaje and in trapped leaf litter in Sampaje. Even though the conidial output from tissues of Drynaria and trapped leaf litter were not equivalent to stream submerged leaf litter, the species richness ranged between 40% and 75% in Konaje and Sampaje streams. As stable epiphyte, Drynaria exposed to wet and dry regimes in tree canopies of west coast and Western Ghats likely to serve as host for perfect states of water-borne hyphomycetes.

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Occurrence and survival of aquatic hyphomycetes under terrestrial conditons

Cited by 15 publications

References 11 publications

Beyond the water column: aquatic hyphomycetes outside their preferred habitat

Beyond the water column: aquatic hyphomycetes outside their preferred habitat

A fungal endophyte of black spruce (Picea mariana) needles is also an aquatic hyphomycete

Association of water-borne conidial fungi with epiphytic tree fern (Drynaria quercifolia)

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