Chemoattraction of anaerobic ruminai fungi zoospores to selected phenolic acids

Wubah, D. A.; Kim, David

doi:10.1016/s0944-5013(96)80022-x

Cited by 21 publications

(15 citation statements)

References 11 publications

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“…This micromorphological behavior of Mucor species under anoxic conditions could be of high importance for the assessment of invasion and pathogenicity of some opportunistic fungi under anoxic–hypoxic conditions. It is worth mentioning in connection with this that some anaerobic fungal zoospores were chemoattracted to phenolic acids (Wubah & Kim, ), which could be released during degradations of woody materials.…”

Section: Discussionmentioning

confidence: 99%

Ecology, adaptation, and function of methane‐sulfidic spring water biofilm microorganisms, including a strain of anaerobic fungus Mucor hiemalis

Hoque

Fritscher

2017

MicrobiologyOpen

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Ecological aspects, adaptation, and some functions of a special biofilm and its unique key anaerobic fungus Mucor hiemalis strain EH11 isolated from a pristine spring (Künzing, Bavaria, Germany) are described. The spring's pure nature is characterized by, for example, bubbling methane, marine‐salinity, mild hydrothermal (~19.1°C), sulfidic, and reductive‐anoxic (Eh: −241 to −253 mV, O2: ≤ 0.1 mg/L) conditions. It is geoecologically located at the border zone between Bavarian Forest (crystalline rocky mountains) and the moor‐like Danube River valley, where geological displacements bring the spring's water from the deeper layers of former marine sources up to the surface. In the spring's outflow, a special biofilm with selective microorganisms consisting of archaea, bacteria, protozoa (ciliate), and fungus was found. Typical sulfidic‐spring bryophyta and macrozoobenthos were missing, but many halo‐ and anaerotolerant diatoms and ciliate Vorticella microstoma beside EH11 were identified. Phase contrast and scanning electron microscopy revealed the existence of a stabilizing matrix in the biofilm formed by the sessile fungal hyphae and the exopolysaccharide substance (EPS) structures, which harbors other microorganisms. In response to ecological adaptation pressure caused by methane bubbles, EH11 developed an atypical spring‐like hyphal morphology, similar to the spiral stalk of ciliate V. microstoma, to rise up with methane bubbles. For the first time, it was also demonstrated that under strict anaerobic conditions EH11 changes its asexual reproduction process by forming pseudosporangia via hyphal cell divisions as well as switching its metabolism to chemoautotrophic bacteria‐like anaerobic life using acetate as an e‐donor and ferrihydrite as an e‐acceptor, all without fermentation. EH11 can be suggested to be useful for the microbial community in the Künzing biofilm not only due to its physical stabilization of the biofilm's matrix but also due to its ecological functions in element recycling as well as a remover of toxic metals.

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Section: Discussionmentioning

confidence: 99%

Ecology, adaptation, and function of methane‐sulfidic spring water biofilm microorganisms, including a strain of anaerobic fungus Mucor hiemalis

Hoque

Fritscher

2017

MicrobiologyOpen

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“…as compared to bacteria alone. Rumen fungi secrete an array of enzymes including esterases (feruloyl esterase, p-coumaryl esterase and acetyl esterase) which break the ester bonds between hemicelluloses and lignin, thus releasing free celluloses and hemicelluloses for the other microbes to attack (Wubah and Kim 1996 ;Yue et al 2009 ).…”

Section: Fungimentioning

confidence: 99%

Rumen Microbial Ecosystem of Domesticated Ruminants

Agarwal

Kamra

Chaudhary

2015

Rumen Microbiology: From Evolution to Revolution

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The research has indicated that ruminants and their gut microbiota both have co-evolved while adapting to their climatic and botanical environments. The microorganisms present inside the rumen of livestock have a profound infl uence on the conversion of feed into end products, which can impact on both the animal and environment. The present chapter deals with the different types of microbes present inside the rumen of domesticated animals and their activity along with future prospects in the area of rumen microbial ecosystems.

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“…Nonself recognition triggering HI responses occurs post-fusion. 4. The self-signaling chemoattractant molecule(s) and its putative receptor(s) are still unknown.…”

Section: Vegetative Self-fusion Between Conidial Germlings Is a Bidirmentioning

confidence: 99%

“…The cognate receptors of sirenin and parisin, however, have not yet been identified. Zoospores of anaerobic ruminal fungi utilize phenolic acids as chemoattractants to locate lignified tissue as a growth substrate within the gut of their host herbivores [4], whereas negatively geotactic zoospores of the phytopathogenic oomycete (a fungal-like organism, phylogenetically closer to brown algae and diatoms) Phytophthora sojae are specifically attracted by the isoflavones daidzein and genistein that are secreted from soy bean roots, to which cells attach, encyst and establish disease [5,6]. Recent studies implicated G-protein-coupled receptor (GPCR) and calcium signaling in the chemotactic response of P. sojae [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Chemoattractive Mechanisms in Filamentous Fungi

Lichius¹,

Lord²

2014

TOMYCJ

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Research on cell communication and differentiation in filamentous fungi has provided a number of novel insights into chemoattractive mechanisms in recent years. Still, identification of specific chemoattractant molecules, cognate receptors and downstream signaling pathways is strongly biased towards those involved in mating; probably due to the relative ease of functional genomic comparison to the budding yeast model. The multicellular nature of filamentous fungi, however, preserved a more complex morphology compared to unicellular fungi and revealed chemoattractive mechanisms lost during yeast evolution. Two hallmarks of this higher complexity are the formation of an interconnected colony network and the development of elaborate sexual reproductive organs. Morphogenesis of both structures depends on two different modes of chemoattraction: attraction to self and attraction to nonself. Nonself chemoattraction between genetically distinct mating partners is the basis for sexual reproduction and generally regulated through a bilateral sexpheromone/cognate-receptor system, widely but not exclusively equivalent to that known from yeasts. In contrast, selfchemoattraction between genetically identical cells is regulated independently of the sex-pheromone/cognate-receptor systems, and does not exist in yeast. Although both chemoattractive modes do share a number of molecular components, we are only beginning to understand how cell morphogenesis is regulated by means of gene expression and targeted protein recruitment during the establishment of self-fusion. This review provides an overview on the main morphogenetic elements involved in fungal chemoattraction, and summarizes our current understanding of the underlying molecular mechanisms of self-and nonself-fusion during filamentous fungal development.

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Chemoattraction of anaerobic ruminai fungi zoospores to selected phenolic acids

Cited by 21 publications

References 11 publications

Ecology, adaptation, and function of methane‐sulfidic spring water biofilm microorganisms, including a strain of anaerobic fungus Mucor hiemalis

Ecology, adaptation, and function of methane‐sulfidic spring water biofilm microorganisms, including a strain of anaerobic fungus Mucor hiemalis

Rumen Microbial Ecosystem of Domesticated Ruminants

Chemoattractive Mechanisms in Filamentous Fungi

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