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heliotropism
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heliotropism
heliotropism Bot. (hiːlɪˈɒtrəʊpɪz(ə)m) [mod. f. Gr. ἥλιος sun + -τροπος turning: see -ism. In F. héliotropisme (1832, De Candolle, Physiol. Végét. II. 844), mod.L. and Ger. heliotropismus.] The property, exhibited by growing parts of plants, of bending or turning in a particular manner under the inf...
Oxford English Dictionary
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Heliotropism
They demonstrated no diurnal heliotropism but strong seasonal heliotropism. Leaf heliotropism
Leaf heliotropism is the solar tracking behavior of plant leaves.
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Heliotrope
Heliotropium, a genus of flowering plants
Heliotrope may also refer to:
Natural science
Heliotrope (mineral), a variety of jasper or chalcedony
Heliotropism
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hydrotropism
hydrotropism Bot. (haɪˈdrɒtrəpɪz(ə)m) [f. as hydrotropic a. + -ism.] The property, exhibited by the growing parts (esp. the roots) of plants, of bending or turning under the influence of moisture. Cf. heliotropism.1882 F. Darwin in Nature 27 Apr. 600 Hydrotropism,—Roots have the power of bending tow...
Oxford English Dictionary
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apheliotropism
apheliotropism (əˌfiːlɪˈɒtrəpɪz(ə)m) [f. apheliotrop-ic + -ism.] The habit (in plants) of bending away from the light.1880 Darwin Movem. Plants 5 It is much more convenient to confine the word heliotropism to bending towards the light, and to designate as apheliotropism bending from the light. 1880 ...
Oxford English Dictionary
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Tropism
established direction
Gravitropism (sometimes referred to as geotropism): is movement or growth in response to gravity
Apogeotropism: negative geotropism
Heliotropism : the diurnal motion or seasonal motion of plant parts in response to the direction of the Sun, (e.g. the sunflower)
Apheliotropism: negative heliotropism
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tropism
tropism Biol. (ˈtrɒpɪz(ə)m, ˈtrəʊpɪz(ə)m) [The second element of heliotropism, geotropism, etc., used as an inclusive or generic term.] The turning of an organism, or a part of one, in a particular direction (either in the way of growth, bending, or locomotion) in response to some special external s...
Oxford English Dictionary
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Papaver radicatum
The plant also shows heliotropism where the flower grows to face the sunlight, and the petals reflect light towards the pistil.
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geotropism
geotropism Bot. (dʒiːˈɒtrəpɪz(ə)m) [f. as prec. + -ism. First used in Ger. form geotropismus by A. B. Frank Beitr. z. Pflanzenphysiol. (1868).] A collective term for the phenomena of irritability presented by various parts of plants in relation to the action of gravity. positive geotropism: the tend...
Oxford English Dictionary
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Ranunculus nivalis
It displays prevalent heliotropism, thus gaining an advantage in its harsh, cold environment through capturing more solar energy by following the sun.
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thigmotaxis
‖ thigmotaxis Biol. (θɪgməʊˈtæksɪs) [mod.L. f. Gr. θίγµα touch + τάξις arrangement, disposition.] The way in which an organism moves or disposes itself in response to a touch stimulus, i.e. by being attracted (positive thigmotaxis) or repelled (negative thigmotaxis).1900 B. D. Jackson Gloss. Bot. Te...
Oxford English Dictionary
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Ranunculus adoneus
Heliotropism
The flowers present heliotropism, a property that is often present in alpine and arctic plants.
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traumatropism
traumatropism Biol. (trɔːˈmætrəʊpɪz(ə)m) Also traumatotropism. [Short for *traumatotropism, f. Gr. τραῦµα wound, after geotropism, heliotropism, etc.] A peculiar growth or curvature of an organism (esp. a plant) resulting from a wound. traumaˈtropic a., of, pertaining to, or of the nature of traumat...
Oxford English Dictionary
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向日葵晚上在干嘛,跟着月亮吗?
Circadian regulation of sunflower heliotropism, floral orientation, and pollinator visits.
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Stacey Harmer
The sunflower's long stem made it easy to identify its heliotropism. Due to this deficiency, dw2 sunflowers have short stems and no heliotropism.
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