Search results for "M. truncatula"

Impact of endopolyploidy on seed coat development and cell expansion in Medicago truncatula

2013

Growth of the seed coat is regulated by genetic interactions between maternal and filial tissues that ultimately establish seed size. However, endopolyploidy is one of the welldocumented factors controlling organ size. During seed development, the arrest of cell division at 4 DAP in the expanding seed coat is compensated for by cell elongation. Thus, the ploidy status of seed coat nuclei was assessed in order to determine if there is any correlation of endopolyploidy with cell elongation. In 10 DAP seed sections, the DAPI-integrated fluorescence, which correlates to DNA quantity, was measured in the seed coat parenchyma nuclei using the diploid embryo nuclei as internal control. Significant…

Cadmium stress alleviation by arbuscular mycorrhizal symbiosis: proteomic studies of the mechanisms involved in shoots of M. truncatula

2009

Déterminisme génétique de la plasticité de la composition protéique des graines de légumineuses vis-à-vis de l'environnement : rôle du métabolisme du…

2021

The renewed interest in plant proteins has stimulated research aimed at developing markers to aid in the selection of legume varieties better adapted to nutritional needs. Among the traits to be improved and stabilized is the amino acid balance of seeds, the essential amino acids methionine and tryptophan being particularly under-represented in legume seeds. This thesis focuses on seed protein composition, which is a major determinant of the seed amino acid balance. The objective was to explore the genetic and environmental variability in this trait and to identify genes potentially involved in its plasticity when subjected to environmental stresses. In the first part of the thesis, the pro…

Sulfate transporters in the plant’s response to drought and salinity: regulation and possible functions

2014

International audience; Drought and salinity are two frequently combined abiotic stresses that affect plant growth, development, and crop productivity. Sulfate, and molecules derived from this anion such as glutathione, play important roles in the intrinsic responses of plants to such abiotic stresses. Therefore, understanding how plants facing environmental constraints re-equilibrate the flux of sulfate between and within different tissues might uncover perspectives for improving tolerance against abiotic stresses. In this review, we took advantage of genomics and post-genomics resources available in Arabidopsis thaliana and in the model legume species Medicago truncatula to highlight and …