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Description of Eudorina

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Colonies cylindrical, ellipsoidal or nearly spherical; composed of (8), 16, 32, 64 (or 128) µmostly 32) cells embedded in the periphery of a common gelatinous matrix; colonial boundary not penetrating between cells into centre of colony, each cell surrounded tightly by separate fibrillar zone (cellular envelope) of extracellular matrix within tripartite colonial boundary; cells separated from each other by spaces; cells spherical to ovoid, with 2 equal-length apical flagella; chloroplast cup-shaped, sometimes radially striated; pyrenoids one to many; eyespot present; nucleus more or less central; contractile vacuoles 2, anterior, and several others randomly distributed; asexual reproduction with plakeal stage and inversion to form daughter colonies within transparent vesicles in the parental gelatinous matrix, smaller cells often not undergoing division if colony contains different sizes of cells; sexual reproduction anisogamous, homothallic or heterothallic, with large, biflagellate female gametes (eggs) and packets of small, biflagellate male gametes (sperm); male gametes with a slender cytoplasmic protrusion at base of flagella; zygotes spherical, smooth-walled, often with reddish contents; on germination, one or two biflagellate gone cells escaping from zygote wall and dividing into a gone colony; aplanospores observed; nutrition possibly obligately phototrophic; freshwater, widely distributed in pools, ditches, plankton of softwater lakes.
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Eudorina

provided by wikipedia EN

Eudorina is a paraphyletic genus in the volovocine green algae clade.[1] Eudorina colonies consist of 16, 32 or 64 individual cells grouped together. Each individual cell contains flagella which allow the colony to move as a whole when the individual cells beat their flagella together. Description by GM Smith (1920, p 95):[2]

Description

Eudorina colonies typically consist of 16, 32 or 64 cells, each of which is similar to Chlamydomonas reinhardtii. These cells are bedded within an extracellular matrix composed of glycoproteins. Colonies are spherical and motile, with motiity derived from the flagellated individual cells. Eudorina is facultatively sexual, meaning colonies can reproduce either sexually or asexually.[3] During development, each Chlamydomonas-like cell undergoes several rounds of division to form plakeas, which then invert to form daughter colonies before hatching out of the mother colony.[4]

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Eudorina elegans

References

  1. ^ See the NCBI webpage on Eudorina. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""'"'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
  2. ^ Smith, GM. Phytoplankton of Inland Lakes of Wisconsin, Part I, Wisconsin Geological and Natural History Survey, Madison, WI. (1920).
  3. ^ Coleman, AW (2012). "A COMPARATIVE ANALYSIS OF THE VOLVOCACEAE (CHLOROPHYTA)". Journal of Phycology. 48 (3): 491–513. doi:10.1111/j.1529-8817.2012.01168.x.
  4. ^ Gottlieb; Goldstein (1977). "Colony development in Eudorina elegans". Journal of Phycology. 13: 358–364. doi:10.1111/j.1529-8817.1977.tb02942.x.

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Eudorina: Brief Summary

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Eudorina is a paraphyletic genus in the volovocine green algae clade. Eudorina colonies consist of 16, 32 or 64 individual cells grouped together. Each individual cell contains flagella which allow the colony to move as a whole when the individual cells beat their flagella together. Description by GM Smith (1920, p 95):

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