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Titre
Two cell wall Kunitz trypsin inhibitors in chickpea during seed germination and seedling growth
Autor(es)
Sujet
Cell wall
Cicer arietinum
Embryonic axes
Proteinase inhibitor
Seed germination
Vascular tissue
Fecha de publicación
2009
Resumen
Two Kunitz trypsin inhibitors TPI-1 and TPI-2, encoded by CaTPI-1 and CaTPI-2, previously identified and
characterized, have been detected in chickpea (Cicer arietinum L.) embryonic axes from seeds imbibed up
to 48 h. Their gene transcription commenced before germination sensu stricto was completed. The
transcript amount of CaTPI-1 remained high until 24 h after imbibition, when the epicotyls started to
grow, while CaTPI-2 mRNA, which appeared later, reached a maximum at 48 h. Both the temporal and the
spatial distribution of TPI-1 and TPI-2 proteins in the embryonic axes suggest that they perform different
functions. The early appearance of TPI-1 in imbibed seeds suggests that it plays a protective role, preventing
the premature degradation of the proteins stored in the embryonic axes. Its pattern of distribution
suggests that the protein is involved in the regulation of vascular tissue differentiation, protecting
the cells from some proteinases involved in programmed cell death. With regard to TPI-2, its later
synthesis after imbibition, together with its tissue distribution, indicates that it is mainly active following
germination, during elongation of the embryonic axes.
URI
ISSN
0981-9428
DOI
10.1016/j.plaphy.2008.11.009
Aparece en las colecciones
- GIPACYCV. Artículos [59]
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Nombre:
Kunitz seed_Plant Physiology Biochemistry 2009.pdfEmbargado hasta: 2099-09-09
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Artículo de investigación