to inhibitorio de ABA también es contrarrestado por giberelinas. Latencia de .. Se han descrito varias funciones biológicas de las poliaminas, entre ellas. parte giberelinas (gas). parte descubrimiento de las giberelinas. el También puede variar la citada estructura en función de la posición del grupo hidroxilo. GIBERELINAS Y CITOQUININAS. LUGAR DE BIOSÍNTESIS DE LA CITOQUININA. FUNCIONES.

Author: Goltikinos Zolot
Country: Kosovo
Language: English (Spanish)
Genre: Music
Published (Last): 14 December 2004
Pages: 42
PDF File Size: 5.59 Mb
ePub File Size: 16.37 Mb
ISBN: 198-6-73241-615-2
Downloads: 74863
Price: Free* [*Free Regsitration Required]
Uploader: Brajind

Physiological studies on the head formation in cabbage. Changes in the branching pattern of Pinus radiata derived from grafting are supported by variations in the hormonal content.

Mehler AH Studies on reactions of illuminated chloroplasts. Reproducido de Taiz y Zieger In the next chapter we are going to talk about the Enzymatic Antioxidants Defense Mechanisms. This group of metalloenzymes catalyzes the dismutation of superoxide radicals to H2O2 and O In these compartments the O2. In contrast to vitamin C, we can produce our own GSH, as long as we have the amino acids which compose it: Plant Signal Behav giberelinad Auxin regulation of cytokinin nbiosynthesis in Arabidopsis thaliana: Journal of Experimental Botany The role of mitochondrion in plant response to biotic stress.

Systemic cell death is elicited by the interaction of a single gene in Nicotiana and gene VI from cauliflower dunciones virus. Role of terminal bud in the head formation fubciones.

Most of the cacao plantations of Colombia are certainly old and need to be renewed due to low yield. Journal of General Virology 89, Services on Demand Article. Putrescine Putspermidine Spdand spermine Spm are the major PA pools commonly present in higher plants and known as active oxygen scavenging compounds being considered as mediators in protective reactions against different stresses Kovacs et al.


This effect resulted in a strong decrease in the redox state of ascorbate in NaCl-treated plants Table 1.

Acclimation of plants to changes in their environment requires a new state of cellular homeostasis achieved by a delicate balance between multiple pathways that reside in different cellular compartments.

Navegador de artículos

Barba-Espin G et al. Effect of gibberellic acid and 6-bencilaminopurine on bud development of cacao grafts Theobroma cacao L.

Effect of soaking seeds in some growth regulators and micronutrients on growth, some chemical constituents and yield of faba bean and cotton plants. Photos were taken 10 days after infection. Las dosis menores no fueron efectivas Sansberro et al. No significant change in oxidised glutathione GSSG was produced, but due to the negative effect of NaCl in GSH, a decrease in the redox state of glutathione was observed in salt-stressed grapevine plantlets Table 1.

In plants, ROS production is kept under tight control by an efficient antioxidative system, which includes both enzymatic and non-enzymatic compounds, that modulates intracellular ROS concentration setting the cellular redox homeostasis. Salinity is one of the most important stress factors which limits the growth and development of plants by altering their morphological, physiological and biochemical attributes. Mechanism of the reduction of oxygen and other Hill reagents.

Plant Cell 13, Sumado a lo anterior, Leite et al. Plant polyamines PAs have been suggested to play important roles in morphogenesis, growth, embryogenesis, organ development, leaf senescence, and abiotic and biotic stress responses Kusano et al.

Oxidative stress | antioxidantsgroup | Página 2

Plant Physiology Leaves from salt treated plantlets developed chlorotic symptoms in the leaf margins; this effect was more evident in the presence of both treatments Fig. How to cite this article.

Molecular Plant-Microbe Interaction 12, Scion height, length, diameter, number of leaves and foliar area were measured every three days. For example, in plants, ROS act as second messengers in vital processes as vegetative development gibwrelinas defence mechanisms.

Most Related  CRAM101 PDF

The observed resistance of transgenic lines to bacterial wild runciones seemed to be independent of tissue necrosis, as observed in other plant-pathogens interactions Kiraly et al.

Mutual interaction of auxin and cytokinins in regulating correlative dominance. In contrast, in the transgenic lines harboring both cyt sod and cyt giberelinad genes lines 35 and 39infected leaf tissue presented only a chlorotic area and localized necrosis occurred only occasionally Fig.

To mitigate and repair damage initiated by ROS, plants have developed a complex antioxidant defense system. It can detoxify lipid peroxides and 1 O 2 directly.

Las hormonas vegetales. by LoreEloMari PereCabePadi on Prezi

A synergistic effect on lipid peroxidation was observed in salt-treated plantlets grown in the presence of MGBG Fig. Because it seems that ROS signalling is responsible for the activation of different acclimation responses in plants, it is easy to understand why changes in ROS metabolism were found to cause enhanced tolerance or sensitivity to stress situation Miller et al.

For this reason, the present work takes on the massive production of high yielding scions, which, notwithstanding, have shown grafting problems, specifically regarding bud initiation and further growth. Gibereilnas anotar que las plantas de dichos ensayos no fueron cortadas o modificadas en su giberelinae. Salt treatment affected the PA contents in grapevine plantlets, especially the free and conjugate forms of agmatine Agm funviones Put. Auxin acts in xylem-associated or medullary cells to mediate apical dominance.

Las citoquininas inician el crecimiento de las yemas laterales Taiz y Zeiger,