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tropism    
n. 向性,趋性,屈性

向性,趋性,屈性

tropism
n 1: an involuntary orienting response; positive or negative
reaction to a stimulus source

Tropism \Tro"pism\ (tr[=o]"p[i^]z'm), n. [Gr. troph` a turning,
tre`pein to turn -ism.] (Physiol.)
Modification of the direction of growth, caused by some
external influence, such as light; -- sometimes used for
motion of an organism toward or away from an external
stimulus, more properly called {taxis}.
[Webster 1913 Suppl. PJC]


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  • TROPISM Definition Meaning - Merriam-Webster
    The meaning of TROPISM is involuntary orientation by an organism or one of its parts that involves turning or curving by movement or by differential growth and is a positive or negative response to a source of stimulation
  • Tropism - Wikipedia
    Viruses and other pathogens affect what is called "host tropism", "tissue tropism", or "cell tropism"; in which case tropism refers to the way in which different viruses pathogens have evolved to preferentially target specific host species, specific tissue, or specific cell types within those species
  • Tropism - Definition, Types, Mechanism, Examples, Importance
    What is Tropism? Tropism refers to the inherent capability of an organism, predominantly plants, to orient or move in reaction to an external stimulus This response is not learned but is an innate, genetically encoded behavior
  • Tropism | Phototropism, Geotropism Chemotropism | Britannica
    Tropism, response or orientation of a plant or certain lower animals to a stimulus that acts with greater intensity from one direction than another It may be achieved by active movement or by structural alteration
  • Tropism - Definition, Types and Examples | Biology Dictionary
    A tropism is the innate ability of an organism to turn or move in response to a stimulus As opposed to a learned ability, innate reactions are genetically programmed
  • 4. 2. 1: Tropisms - Biology LibreTexts
    A tropism is directional growth in response to a stimulus A positive tropism occurs when a plant (or a part of the plant) grows towards the stimulus, and a negative tropism is growth away from the stimulus
  • Plant Tropisms: Phototropism, Thigmotropism, and More
    Tropism in plants is a growth response to environmental stimuli, such as light (phototropism) or gravity (gravitropism), allowing plants to thrive
  • tropism - Wiktionary, the free dictionary
    The capacity of a virus to selectively infect cells in particular organs is referred to as tropism […] Viral tropism depends on viral and host factors
  • TROPISM | English meaning - Cambridge Dictionary
    ˈtrəʊ pɪ z ə m us ˈtroʊ pɪ z ə m the fact of living things turning towards or away from something, for example light (Definition of tropism from the Cambridge Advanced Learner's Dictionary Thesaurus © Cambridge University Press)
  • Understanding Plant Tropisms: Phototropism, Gravitropism, and More
    Plants are constantly moving, just too slowly for most of us to notice Every stem curving toward a window, every root drilling downward through soil, and every vine coiling around a fence post is executing a directed growth response called a tropism





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