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: Gataxe Mugami
Country: Saint Kitts and Nevis
Language: English (Spanish)
Genre: Automotive
Published (Last): 10 May 2017
Pages: 282
PDF File Size: 10.73 Mb
ePub File Size: 18.52 Mb
ISBN: 629-8-59453-179-1
Downloads: 49975
Price: Free* [*Free Regsitration Required]
Uploader: Shashicage

Interactions of temperature and ferulic acid stress on grain sorghum and soybeans.

Growth regulators-treated plants also showed higher RGR values, which could be explained mainly because of a strong promotion in NAR by both auxin and cytokinin.

For the germination experiments the number of germinated seeds was checked every 8h. The experiment was arranged in a three-way factorial design with four concentrations of IAA, four concentrations of BAP and three plant training systems.

Amiloplasto – Wikipedia, a enciclopedia libre

Mechanical signalling in plants: Thigmomorphogenesis and its interaction with gravity in climbing plants of Epipremnum aureum. Interference from established stands of silverleaf nightshade Solanum elaeagnifolium on cotton Gossypium hirsutum lint yield. Rooted cuttings gravitropsmo E. Allelopathic effect of Pluchea lanceolata Asteraceae on characteristics of four soils and tomato and mustard growth. These effects were also accompanied with an increasing dry mass partitioning towards the root system, from climbing to eb plants Table 2.


However, an even more important effect of training system on plant performance was that of carbon assimilation, being both the calculated NAR and measured photosynthetic rates higher in climbing plants than in creeping ones, and higher in creeping plants than in hanging ones Table 3Figure 2. These results are in good agreement with previous work on creeping E.

Acta Botanica Brasilica 6: A contribuire al grande successo della Festa poi la Mostra di lepidotteri e coleotteri In the present work, we also found that growth of hanging plants was effectively promoted in the same way than creeping ones. The aim of this work was to study E.

Meaning of “fototropismo” in the Spanish dictionary

Unifying model of shoot gravitropism reveals proprioception as a central feature of posture control in plants. The root versus shoot allometric analysis of untreated controls showed a trend for higher root vs.

A force of nature: Frontiers in Plant Science 5: LAR was rather unaffected by growth regulator treatments but in the few treatments in which significant growth regulators effects were found i. The application of IAA or BAP at gtavitropismo mg L -1 to creeping and hanging plants significantly promoted growth but, in climbing plants, a negative effect was generally observed.

Up to a large extent, differences in RLAE among training planhas for each growth regulators combinations treatment accompanied those found for total leaf area at the end of the experiment. A first possibility is a direct effect of auxin on both leaf expansion Keller, and leaf initiation Scarpella et al.



Growth regulators-driven promotion of carbon fixation per unit leaf area may be, in part,explained by changes in the leaf anatomy, including thicker leaves Figure 3 A with lower SLA Table 1 and increased proportion of intercellular spaces, which may help decrease resistance to CO 2 diffusion from the sub stomatal cavity to the chloroplast stroma Figure 3 B-D Tholen et al.

Variation in LAR was in general low, climbing plants tend to present higher values than either creeping or hanging ones. Allelopathic effects of parthenin against two weedy species, Avena fatua and Bidens pilosa.

Auxins play lzs roles in organ development. These changes in plant growth habit modify, in turn, both shoot and root growth Di Benedetto et al. Mechanical stimulation-induced cross-adaptation in plants: American Journal of Botany Autotoxicidade e alelopatia em sementes de Solanum lycocarpum St. Then, exogenous cytokinin supply has been found to be als effective means of overcoming root restriction. The extracts did not affect the germinability but increased the average germination time in a dose-dependent manner at the three temperatures.

Biomass production in ornamental foliage plants:

Author: admin