positive hydrotropism
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 — 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… …   The Collaborative International Dictionary of English

  • 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 — 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

  • negative hydrotropism — 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… …   The Collaborative International Dictionary of English

  • Chemotropism — is growth of organisms (or parts of organism) such as bacteria and plants, navigated by chemical stimulus from outside of the organism. The response by the plant is termed ‘positive’ if the growth is towards the stimulus or ‘negative’ if the… …   Wikipedia

  • hydropositive — | ̷ ̷ ̷ ̷ at hydro + adjective Etymology: hydr + positive biology : characterized by positive hydrotaxis or hydrotropism …   Useful english dictionary

  • Tropism — A tropism (from Greek, tropos , to turn) is a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus. In tropisms, this response is dependent on the… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”