biology

Neocallimastix patriciarum

Neocallimastix patriciarum is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Neocallimastix patriciarum rather than just read about it. In short: Neocallimastix patriciarum is a species of fungus that lives in the rumen of sheep and other ruminant species. N. patriciarum is an obligate anaerobe and is an important component of the microbial population within the rumen.

Key takeaways

Neocallimastix patriciarum belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Neocallimastix patriciarum to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Neocallimastix patriciarum from memory before moving on to harder problems.

Reference excerpt

Neocallimastix patriciarum is a species of fungus that lives in the rumen of sheep and other ruminant species. N. patriciarum is an obligate anaerobe and is an important component of the microbial population within the rumen. Only one of a few rumen fungi, this species is interesting and unique within the fungal world. Originally thought to be a flagellate protists, species within the phylum Neocallimastigomycota were first recognized as a fungus by Colin Orpin in 1975 when he demonstrated that they had cell walls of chitin

Taxonomic classification N. patriciarum, along with other species in Neocallimastix, were originally considered part of Chytridiomycota. They have since been more accurately classified into the newly named phylum Neocallimystigomycota which encompasses only one family: Neocallimastigaceae. The classification of N. patriciarum in Chytridiomycota was primarily due to the presence of flagellated zoospores, a defining characteristic of the Chytridiomycota phylum. Neocallimystigomycota has been elevated to phylum level based on significant differences in morphological traits and molecular phylogenetics.

Morphology

Thallus N. patriciarum have monocentric thalli. The young thallus is made up of incipient zoosporangium and rhizoids, as is typical of monocentric thalli. The rhizoids are coiled and a septum delineating the zoosporangium is present in the mature thallus. An apophysis can be observed between the main rhizoid and the zoosporangium. Zoospores are released through a single apical pore present on the mature thallus.

Zoospore N. patriciarum have multi-flagellated zoospores that range from spherical to equatorially constricted. The ultrastructure of zoospores has been used to distinguish between N. patriciarum and N. frontalis, although some researchers suggest that this is method of distinction is unsound due to insufficient samples. Zoospore composition in N. patriciarum is also unique in that it lacks mitochondria, golgi bodies, liquid droplets, or gamma particles, all of which are present in aerobic fungi. The presence of a hydrogenosome is thought to replace the mitochondrion, and is described as an organelle that is capable of anaerobic metabolism of hexoses to acetic and formic acids and likely derived from mitochondria

Life cycle The multi-flagellate zoospores encyst and germinate to form young thalli. The lifecycle is simple in that it alternates between the motile zoospore and a vegetative stage. The vegetative stage is typically associated with plant material in the digestive tract of host animal. N. patriciarum can exist outside of the internal protected habitat of the rumen as cysts or melanized thalli in dried feces. Transmission into a new host can occur through licking or grooming leading to ingestion and continuation of the lifecycle starting with germination of the cyst.

Habitat, ecology, and lifestyle As an anaerobic fungi, N. patriciarum relies on the ability of hydrogenosomes to metabolize hexoses in the anaerobic environment of the rumen. This allows the fungi to act in symbiosis with methanogenic rumen bacteria which create a pathway for the hydrogen byproduct to be converted to methane and emitted from the ruminant digestive tracts. Essentially, N. patriciarum works with rumen bacteria and protozoa (those that make up the microbial population) to degrade ingested plant biomass. Since N. patriciarum colonizes and degrades plant material within the rumen ecosystem, it is considered saprophytic. It has various enzymes that allow it to break down xylan, cellulose, starch, and glycogen. This efficient and specific enzymatic action opens up N. patriciarum to extensive research in biofuels production.

References

Further reading Cheng, Y.-S.; Chen, C.-C.; Huang, C.-H.; Ko, T.-P.; Luo, W.; Huang, J.-W.; Liu, J.-R.; Guo, R.-T. (2014). "Structural Analysis of a Glycoside Hydrolase Family 11 Xylanase from Neocallimastix patriciarum: INSIGHTS INTO THE MOLECULAR BASIS OF A THERMOPHILIC ENZYME". Journal of Biological Chemistry. 289 (16): 11020–11028. doi:10.1074/jbc.M114.550905. ISSN 0021-9258. PMC 4036243. PMID 24619408. Wang, Tzi-Yuan; Chen, Hsin-Liang; Lu, Mei-Yeh J; Chen, Yo-Chia; Sung, Huang-Mo; Mao, Chi-Tang; Cho, Hsing-Yi; Ke, Huei-Mien; Hwa, Teh-Yang; Ruan, Sz-Kai; Hung, Kuo-Yen; Chen, Chih-Kuan; Li, Jeng-Yi; Wu, Yueh-Chin; Chen, Yu-Hsiang; Chou, Shao-Pei; Tsai, Ya-Wen; Chu, Te-Chin; Shih, Chun-Chieh A; Li, Wen-Hsiung; Shih, Ming-Che (2011). "Functional characterization of cellulases identified from the cow rumen fungus Neocallimastix patriciarum W5 by transcriptomic and secretomic analyses". Biotechnology for Biofuels. 4 (1): 24. doi:10.1186/1754-6834-4-24. ISSN 1754-6834. PMC 3177772. PMID 21849025. Liu, Jin-Hao, et al. "Characterization of a Neocallimastix patriciarum xylanase gene and its product." Canadian Journal of Microbiology 45.11 (1999): 970–974. Lee, J. M. Tamblyn; Hu, Y.; Zhu, H.; Cheng, K. J.; Krell, P. J.; Forsberg, C. W. (1993). "Cloning of a xylanase gene from the ruminal fungusNeocallimastix patriciarum27 and its expression inEscherichia coli". Canadian Journal of Microbiology. 39 (1): 134–139. doi:10.1139/m93-020. ISSN 0008-4166. PMID 8439870. Wang, Hui-Chang; Chen, Yo-Chia; Hseu, Ruey-Shyang (2014). "Purification and characterization of a cellulolytic multienzyme complex produced by Neocallimastix patriciarum J11". Biochemical and Biophysical Research Communications. 451 (2): 190–195. doi:10.1016/j.bbrc.2014.07.088. ISSN 0006-291X. PMID 25073115.

External links MycoBank

Worked examples

Example 1 — a first encounter with Neocallimastix patriciarum

Start with the simplest possible case. Write down what Neocallimastix patriciarum claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Neocallimastix patriciarum before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Neocallimastix patriciarum ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Neocallimastix patriciarum

In research: Neocallimastix patriciarum appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Neocallimastix patriciarum in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Neocallimastix patriciarum is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fungi described in 1986, Fungus species, Neocallimastigomycota, so understanding it makes those chapters shorter.
In everyday life: Look for Neocallimastix patriciarum outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Neocallimastix patriciarum in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Neocallimastix patriciarum means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Neocallimastix patriciarum out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Neocallimastix patriciarum in simple terms?

Why does Neocallimastix patriciarum matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Neocallimastix patriciarum?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Neocallimastix patriciarum.