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词汇 thigmotropism
释义

Definition of thigmotropism in English:

thigmotropism

noun ˌθɪɡmə(ʊ)ˈtrəʊpɪz(ə)mTHiɡməˈtrōpizəm
mass nounBiology
  • The turning or bending of a plant or other organism in response to a touch stimulus.

    〔生〕向触性

    Example sentencesExamples
    • One of the most common examples of thigmotropism is seen in tendrils, which wrap around any object with which they come in contact.
    • Negative thigmotropism is movement away from an object, such as a root away from a rock in the soil.
    • More recently, however, the Arabidopsis root movements were reinterpreted as the combined effect of essentially three processes, circumnuation, gravitropism and negative thigmotropism.
    • At first, mushroom primordia grow perpendicularly away from the surface from which they arise, independently of the direction of light or gravity, a response that may be some kind of negative thigmotropism or negative hydrotropism.
    • This paper focuses on the recent advances in four of the best-understood tropic responses and how each affects plant growth and development: phototropism, gravitropism, thigmotropism and hydrotropism.

Derivatives

  • thigmotropic

  • adjectiveˌθɪɡmə(ʊ)ˈtrɒpɪkˌθɪɡmə(ʊ)ˈtrəʊpɪk
    Biology
    • Most mushrooms have some kind of negative thigmotropic response, so that if a mushroom encounters an object as it is growing, responses such as stipe bending, bifurcation, or change in the pattern of pileus growth will cause the mushroom to grow out of the way of the object.
      Example sentencesExamples
      • If the shoot rubs against a support with the right shape, the rubbing induces a thigmotropic response (tropism induced by touch) and the shoot begins to curl around the support.
      • Later experiments proved that the thigmotropic response is possibly the strongest tropic response in plants.
      • Clematis petioles are positively thigmotropic and its fun to make your own observations of this phenomenon.
      • In the absence of this force, the root pattern will depend only on the circumnutating movement, since the negative thigmotropic reaction, dependent on gravitropism, will also be excluded.

Origin

Early 20th century: from Greek thigma 'touch' + tropism.

Definition of thigmotropism in US English:

thigmotropism

nounTHiɡməˈtrōpizəm
Biology
  • The turning or bending of a plant or other organism in response to a touch stimulus.

    〔生〕向触性

    Example sentencesExamples
    • One of the most common examples of thigmotropism is seen in tendrils, which wrap around any object with which they come in contact.
    • More recently, however, the Arabidopsis root movements were reinterpreted as the combined effect of essentially three processes, circumnuation, gravitropism and negative thigmotropism.
    • At first, mushroom primordia grow perpendicularly away from the surface from which they arise, independently of the direction of light or gravity, a response that may be some kind of negative thigmotropism or negative hydrotropism.
    • Negative thigmotropism is movement away from an object, such as a root away from a rock in the soil.
    • This paper focuses on the recent advances in four of the best-understood tropic responses and how each affects plant growth and development: phototropism, gravitropism, thigmotropism and hydrotropism.

Origin

Early 20th century: from Greek thigma ‘touch’ + tropism.

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