y y Geotropismo Positivo: si los órganos de la planta van en dirección al centro de la tierra; tal es el caso de las El geotropismo es un tipo de tropismo, propio de las plantas, que se refleja en un El gravitropismo se ve definido por la concentración diferencial de auxina. fototropismo em plantas EFECTOS FISIOLÓGICOS DE LAS AUXINAS: FOTOTROPISMO Y GRAVITROPISMO Existen tres sistemas principales de control de.

Author: Tera Jugore
Country: Burkina Faso
Language: English (Spanish)
Genre: Health and Food
Published (Last): 17 August 2005
Pages: 470
PDF File Size: 7.96 Mb
ePub File Size: 7.52 Mb
ISBN: 643-1-30901-931-2
Downloads: 3826
Price: Free* [*Free Regsitration Required]
Uploader: Akinokora

Gravity sensing, a largely misunderstood trigger of plant orientated growth. In climbing plants, the growth regulators-induced decrease in both variables measuring total leaf area accumulation, could be ascribed to a reduced RLA rather than to a decrease in individual leaf area, since growth regulators sprays at any combination in comparison with untreated controls, did not significantly affect the latter. Spanish words that begin with fo.

Lower auxin levels in roots could in turn led to decreased root branching Pacurar et al.


All platas of each plant were sprayed to run-off at sunset with four indoleacetic acid IAA doses 7 days after transplanting and one week later, with four benzylaminopurine BAP concentrations, rendering 16 hormone combination treatments. Similarly, growth regulators-driven decrease in RGR of climbing plants was generally associated with a decrease in NAR, and conversely, the increase in RGR of growth regulators-treated creeping or lsa plants was associated with a significant increase in NAR.

On the other hand, IAA sprays on creeping plants significantly promoted total leaf area only at the lowest concentration tested 5 mg L -1 ; while on hanging plants, all IAA concentrations were similarly effective. Thus, inhibition of polar auxin transport in horizontally or downwardly oriented stems may ultimately result in a decreased whole-plant growth Keller, Conversely, most growth regulators combinations i.


In these works, BAP-driven growth promotion was associated with increased net assimilation rate NAR and net photosynthetic rate.

Gravitropismo by Isabella Linhares on Prezi

Plants were grown under climbing Acreeping B and hanging C training systems. In creeping plants, single BAP sprays at 5 or 50 mg L -1 resulted in increased values, being the concentration of mg L -1 supra-optimal, while in hanging plants all concentrations were promotive particularly the highest one. Pedaliaceae sob diferentes temperaturas. Solanaceae by the maned wolf, Chrysocyon brachyurus Illiger Mammalia, Canidae. These differences ultimately lead to a decreasing foliage production i.

The intercellular space fraction occupied a relatively low proportion of leaf cross-sections i. Leaf area and whole-plant biomass accumulation increased with relatively low BAP application mg L -1while mg L -1 BAP generally appeared as a supra optimal concentration. Lincoln Taiz, Eduardo Zeiger, Como citar este artigo.

The science of grapevines: Interaction involving plantaw in crop systems. Sin embargo, cualquiera puede observar en las plantas de su casa lo que se denomina fototropismo: Several conclusions can be drawn from the results of the present work.

Meaning of “fototropismo” in the Spanish dictionary

They suggested laas the morphological differences between climbing and free hanging plants represent thigmomorphogenic responses of climbing plants to a mechanical stimulus generated by the contact of the stem with the support surface. At 0, 60, 90, and days after transplanting, two plants per block treated with each combination of growth regulators under each training system were destructively sampled.

When plants grown in pots under commercial facilities are vertically supported, leaf size significantly increases in comparison to leaves from basket hanging plants Di Benedetto et al.

Thigmomorphogenesis and its interaction with gravity in climbing plants of Epipremnum aureum. Effect of Solanum glycoalkaloids on potato aphid, Macrosiphum euphorbiae.


No surfactants were used. Interactions of temperature and ferulic acid stress on grain sorghum and soybeans.

Since both creeping and climbing plants may be considered as thigmo-stimulated, differences in growth patterns between them may be solely attributed to gravity. In creeping plants, results were more variable: The root growth was more affected by the extracts, showing tip-necrosis, absence of root hairs, and formation of secondary roots. Variation in LAR was in general low, climbing plants tend to present higher values than either creeping or hanging ones.

Journal of Chemical Ecology In untreated controls, differences in RGR among training systems could be attributed more due to differences in NAR than to variation in LAR, although differences in NAR between climbing and creeping plants were not significant.

The present work was aimed at studying how exogenous auxins and cytokinins may influence growth of E. Golden Pothos varieties are among the most popular tropical ornamental hanging basket crops for interior landscape.

In the present study the effects of aqueous extracts of S. As reported before Di Benedetto et gravitrlpismo.

FOTOTROPISMO – Definition and synonyms of fototropismo in the Spanish dictionary

Exogenous growth regulators supply could then restore decreased endogenous hormonal levels in plants due to vine departure from vertical upward position.

The extracts did not affect the germinability but increased the average germination time in a dose-dependent manner at the three temperatures. Gravitropidmo cytokininpromotes Epipremnum aureum L.