Response of endophytic fungi of Stipa grandis to experimental plant function group removal in Inner Mongolia steppe, China

Su, Yuanting; Guo, Liangdong; Hyde, Kevin D.

doi:10.1007/s13225-010-0040-6

Cited by 84 publications

(73 citation statements)

References 46 publications

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“…Endophytic fungi have been associated with plants for over 400 million years (Krings et al 2007) and have been isolated from many different plants such as mosses (Jakucs et al 2003;Davey and Currah 2006), ferns (Swatzell et al 1996), grasses (Muller and Krauss 2005;Su et al 2010), shrub plants ( Barrow et al 2004;Olsrud et al 2007), deciduous and coniferous trees Albrectsen et al 2010;Mohamed et al 2010), and lichens (Suryanarayanan et al 2005;Li et al 2007). Because of the high diversity of endophytic fungi (Arnold and Lutzoni 2007;Soytong 2007, 2008), their ability to produce various bioactive chemicals (Aly et al 2010;Xu et al 2010) and promotion of host growth and resistance (Cheplick et al 1989;Ting et al 2008;Saikkonen et al 2010), the study of endophyte has become one of the hottest research focuses in mycology.…”

Section: Introductionmentioning

confidence: 99%

Community composition of endophytic fungi in Acer truncatum and their role in decomposition

2011

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The mycota and decomposing potential of endophytic fungi associated with Acer truncatum, a common tree in northern China, were investigated. The colonization rate of endophytic fungi was significantly higher in twigs (77%) than in leaves (11%). However, there was no significant difference in the colonization rates of endophytic fungi between lamina (9%) and midrib (14%) tissues. A total of 58 endophytic taxa were recovered using two isolation methods and these were identified based on morphology and ITS sequence data. High numbers of leaf endophytes were obtained in the method to determine decomposition of leaves by the natural endophyte community (35 taxa) as compared to disk fragment methodology (9 taxa). The weight loss in A. truncatum leaves decomposed by endophyte communities increased with incubation time; the weight loss was significantly higher at 20 weeks than at 3 and 8 weeks. Both common and rare endophytic taxa produced extracellular enzymes in vitro and showed different leaf decay abilities. Our results indicated that the composition and diversity of endophytic fungi obtained differed using two isolation methods. This study suggests that endophytic fungi play an important role in recycling of nutrients in natural ecosystems.

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Section: Introductionmentioning

confidence: 99%

Community composition of endophytic fungi in Acer truncatum and their role in decomposition

2011

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“…Grass endophytes are an example of constitutive mutualism. This is described as an inducible mutualism or horizontal transmission, and involves an infection from one host to another by spores transmitted through the air or in water (Rodriguez et al 2009;Su et al 2010;Oberhofer & Leuchtmann 2014).…”

Section: Patterns Of Endophyte Mutualism Transmissionmentioning

confidence: 99%

Mimosa pigra dieback in the Northern Territory, Australia: Investigation into possible causes

Sacdalan¹

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In this study, Mimosa pigra dieback is described as plants or population of plants which appeared to suffer from ill health, death of their growing points and the emergence of green reshoots coming from the base. Dieback is an important phenomenon, not only in many crops and natural forests worldwide, but also in many invasive trees and shrubs in Australia. The dieback phenomenon is thought to be caused by complex and interacting factors and causes are often difficult to disentangle. In some cases it is a result of an interaction between both biotic and abiotic factors. Since 1988, dieback has been widely observed in Mimosa pigra L.(Fabaceae), a woody shrub that is one of the most serious exotic invaders of floodplains and riparian areas in the Top End of the Northern Territory. However, there has been no conclusive evidence of links between M. pigra dieback and specific causal factors. In addition, the dieback phenomenon has not been previously quantified.This thesis aimed to describe M. pigra dieback phenomenon at plant and population levels and its effect on plant growth, survival and demography. Specifically, the aim of this thesis was to evaluate the role of biotic factors (insect borers and fungal pathogens), and abiotic factors (soil pH and salinity), in relation to the development of M. pigra dieback. In addition, the thesis examines the pathogenicity of the fungal endophytes/pathogens associated with diebackaffected and healthy M. pigra. M. pigra has been a focus of biological control programs for more than 30 years, but it still remains a serious threat in the wetlands and conservation areas in the Top End of the Northern Territory. While extensive studies have been conducted to evaluate the impact of biological control programs, little is actually known about dieback and its causal factors.To evaluate the causal factors of M. pigra dieback, repeated ground surveys, plant health assessment and specimen collection of stems and soils, were conducted in the period 2011 to 2013 in established M. pigra sites on Melaleuca Station, Mary River, Northern Territory. Insect borers were quantified and putative fungal pathogen abundance were surveyed. A combined morphological and phylogenetic approach was used for fungal pathogens/endophyte identification. Using a subset of isolates, trials were performed to examine differences in the pathogenicity of the recovered fungal pathogens/endophytes.Results of field research showed that dieback in M. pigra is highly dynamic and fluctuates in its severity. Different sites showed increases and/or decreases in plant health over time.iii Dieback affects plants in all age classes, from seedlings, juveniles to adult plants, resulting in partial mortality of plants in all age categories over the trial period. Contrary to expectations, none of the biotic and abiotic factors examined showed a direct relationship to the changing population dynamics of M. pigra dieback over time. Nevertheless, fungal isolations demonstrated that M. pigra is a host to a diverse range of endop...

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“…Abdellatif L, Bouzid S, Kaminskyj S, Vujanovic V (2009) Panicum virgatum Kleczewski et al 2012 Phragmites australis Stipa grandis Su et al 2010 Stipa tenacissima Peláez et al 1998 Triticum aestivum Sieber et al 1988 Zea mays Pan et al 2008 …”

Section: Acknowledgementsmentioning

confidence: 99%

Are endophytes an important link between airborne spores and allergen exposure?

2013

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Grasses represent one of the Earth's most common plant groups, and natural and cultivated habitats dominated by grasses cover about 40% of the land surface. In turn, each grass species hosts multiple fungal species which can behave as endophytes. An analysis of the endophytic taxa identified in surveys conducted in 14 grass species showed that some of the most frequent taxa on each grass were also present across several host grasses. These taxa were Alternaria, Epicoccum, Cladosporium, Fusarium, and a few others. A similar analysis of airborne fungi surveyed at 41 different locations throughout the world showed that some of the most geographically widespread, and most locally frequent airborne fungi belonged to the same genera that are dominant endophytes in grasses (i.e.Cladosporium, Alternaria, Fusarium, etc.). Therefore, airborne spores of genera that are ubiquitous in grasses are common worldwide and attain high atmospheric concentrations. In addition, spores of the above mentioned fungi are also important respiratory allergens. Direct observation indicates that saprobic colonization and sporulation of non-systemic grass endophytes could become unrestrained when their host plant tissue dies. Subsequently, when appropriate environmental conditions favour sporulation on grass host surfaces, the natural cycle for airborne conidia initiates, and large numbers of these conidia disperse as inoculum for new endophytic infections. Therefore, the cycle of endophytism may be an important link between climate, plant biology and public health.

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Response of endophytic fungi of Stipa grandis to experimental plant function group removal in Inner Mongolia steppe, China

Cited by 84 publications

References 46 publications

Community composition of endophytic fungi in Acer truncatum and their role in decomposition

Community composition of endophytic fungi in Acer truncatum and their role in decomposition

Mimosa pigra dieback in the Northern Territory, Australia: Investigation into possible causes

Are endophytes an important link between airborne spores and allergen exposure?

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