Inmunolocalización de proteasas y cambios anatómicos asociados a los procesos de senescencia o fructificación en tomate
Flower anthesis is a crucial stage for the ovary´s fate because endogenous stimuli -pollination or high hormonal level- or exogenous ones -hormonal application- induce the fruit set. In the absence of these stimuli, the ovary stops growing and starts the senescence process. It has previously o...
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| Publicado en: | Revista de la Facultad de Ciencias Agrarias |
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| Autores principales: | , , |
| Materias: | |
| Acceso en línea: | https://bdigital.uncu.edu.ar/fichas.php?idobjeto=2675 |
| Sumario: | Flower anthesis is a crucial stage for the
ovary´s fate because endogenous stimuli -pollination
or high hormonal level- or exogenous
ones -hormonal application- induce the fruit set.
In the absence of these stimuli, the ovary stops
growing and starts the senescence process. It
has previously observed that, in unpollinated
ovaries, the senescence goes together with the
increase in the activity/expression of certain
thiolproteases, parameters that decrease
during the early stage of fruit development. The
objective was to analyze the location of
proteases and anatomic changes associated
with the fruit set or ovary senescence processes
that take place during the early stage of the
tomato fruit development obtained by natural
pollination or by treatment with GA3. During
the period in which the unpollinated ovaries
keep their sensitivity to the hormone application,
an accumulation of polypeptides related
antigenically with papain thiolprotease was
observed, mainly in the epidermis of the
pericarp, showing no signs of alterations in the
tissue integrity. Fruits of 8 days of development
obtained with GA3, compared to the pollinated
ones, showed an increase in the thickness of
the pericarp related mainly with a higher
enlargement of the mesocarp cells.
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