obligate

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obligate

[′äb·lə·gət]
(biology)
Restricted to a specified condition of life, as an obligate parasite.
References in periodicals archive ?
Ephedra species are not obligately insect-pollinated, as wind pollination may also occur at the same time (Karl Niklas, this volume).
GS-15 (an obligately anaerobic, gram-negative rod) oxidized simple organic compounds such as acetate, butyrate, and ethanol to carbon dioxide with Fe (III) or Mn (IV) as the sole electron acceptor [53, 95].
rosaceus has an egg size intermediate between that of small-egged obligately planktotrophic and large-egged lecithotropic echinoids (Emlet, 1986).
To the Editor: Bulleidia extructa is an obligately anaerobic, nonmotile, non-spore-forming gram-positive bacillus first described in 2000 by Downes et al.
Mycorrhizal dependence of a plant species is one of its constitutive features, allowing plant classification as facultative or obligately mycotrophic.
While not obligately mycorrhizal, Ammophila from the Atlantic coast of the US have been shown to benefit from AMF colonization under field and greenhouse conditions (Gemma and Koske, 1997; Koske and Gemma, 1997).
Human monocytotropic ehrlichiosis (HME) is an emerging tick-borne disease caused by the obligately intracellular pathogen Ehrlichia chaffeensis that resides in mononuclear phagocytes.
DISCUSSION: The family Hermatobatidae is one of the few obligately marine insect groups on the planet, and specimens are rarely collected except by a few individual researchers who understand the specialized habits and ecology of this group.
A revision of the taxonomy of the obligately foliicolous lichenized fungi.
Acidithiobacillus thiooxidans is a chemolithotrophic acidophilic, obligately autotrophic bacterium which derives its energy by oxidizing reduced or partially reduced sulfur compounds and obtains its carbon by fixing carbon dioxide from the atmosphere [16].