GIBERELINAS FUNCIONES PDF

Las concentraciones de AIA en miligramos por litro se indican junto con las curvas 0, 1, 4 y La cinetina sola tiene poco efecto en el crecimiento del tejido indiferenciado de tabaco en cultivo un callo. El floema y el xilema se desarrollan en presencia de giberelinas y auxinas. Las plantas capaces de detectarlo exhiben fotoperiodicidad. Pr y Pfr son fotointerconvertibles. Cuando amanece o cuando la noche es interrumpida con un breve pulso de luz roja, la mayor parte del fitocromo Pr se convierte en la forma Pfr.

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Se detallan las principales funciones a nivel del metabolismo vegetal y sus posibles interacciones intra e intercelular. Estudiante de Facultad de Ciencias de la Salud. Universidad Nacional. Costa Rica. Universidad Distrital. Johan Steven Alcantara Cortes. Jovanna Acero Godoy.

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Respuestas vegetales

Thus plants often face the challenge of grow under stressful conditions such as water or light deficit or excess, low or high temperature, pathogen attackā€¦ These stresses exert adverse effects on plant growth and development by inducing many metabolic changes, such as the occurrence of an oxidative stress Diaz-Vivancos et al. 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. 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. Under optimal growth conditions, ROS are mainly produced at a low level, being their rate of production drastically increased when plants are exposed to environmental stresses. The next question is obvious, which ROS is the most suitable to be messenger? The oxidative stress that accompanies environmental stresses appears now to be a key component in plant cell signalling.

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Principales reguladores hormonales y sus interacciones en el crecimiento vegetal

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