Hydrotropism Hy*drot"ro*pism, n. 1. (Bot.) A tendency towards moisture. [1913 Webster]

2. (Bot.) In a broader sense, any curvature or turning induced in certain growing plant organs under the influence of moisture.

Note: When the movement is toward the moisture, as is the case in most roots, the phenomenon is called {positive hydrotropism}; when away from the moisture, as in the case of hyphae of certain fungi, {negative hydrotropism}. [Webster 1913 Suppl.]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Hydrotropism — is a directional growth response in which the direction is determined by a stimuli/gradient in water concentration but a most common example is that of plant roots growing in humid air bending toward a higher relative humidity level. The process… …   Wikipedia

  • hydrotropism — [hī drä′trə piz΄əm] n. [ HYDRO + TROPISM] the positive, or negative, movement or growth, as of a plant root, toward, or away from, moisture hydrotropic [hī΄drə träp′ik] adj …   English World dictionary

  • hydrotropism — hidrotropizmas statusas T sritis ekologija ir aplinkotyra apibrėžtis Augalo dalių krypimas link drėgnesnės (teigiamasis hidrotropizmas) arba sausesnės (neigiamasis hidrotropizmas) aplinkos. atitikmenys: angl. hydrotropism vok. Hydrotropismus, m… …   Ekologijos terminų aiškinamasis žodynas

  • hydrotropism — noun Etymology: International Scientific Vocabulary Date: circa 1882 a tropism (as in plant roots) in which water or water vapor is the orienting factor • hydrotropic adjective …   New Collegiate Dictionary

  • hydrotropism — n. [Gr. hydor, water; tropos, turn] The response of an organism to water stimulus …   Dictionary of invertebrate zoology

  • hydrotropism — /huy dro treuh piz euhm/, n. Biol. oriented growth in response to water. [1880 85; HYDRO 1 + TROPISM] * * * …   Universalium

  • hydrotropism — noun The movement of a plant (or other organism) either towards or away from water …   Wiktionary

  • hydrotropism — The property in growing organisms of turning toward a moist surface (positive h.) or away from a moist surface (negative h.). [hydro + G. tropos, a turning] * * * hy·dro·tro·pism hī drä trə .piz əm; .hī drə trō .piz əm, trä n a tropism in which… …   Medical dictionary

  • hydrotropism — n. tendency to turn toward or be influenced by moisture (Botany) …   English contemporary dictionary

  • hydrotropism — [hʌɪ drɒtrəpɪz(ə)m] noun Botany the growth or turning of plant roots towards moisture …   English new terms dictionary

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