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Mineral accumulation in vegetative and reproductive tissues during seed development in Medicago truncatula

Enhancing nutrient density in legume seeds is one of several strategies being explored to improve the nutritional quality of the food supply. In order to develop crop varieties with increased seed mineral concentration, a more detailed understanding of mineral translocation within the plant is requi...

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Autores principales: Garcia, Christina B., Grusak, Michael A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4536387/
https://www.ncbi.nlm.nih.gov/pubmed/26322063
http://dx.doi.org/10.3389/fpls.2015.00622
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author Garcia, Christina B.
Grusak, Michael A.
author_facet Garcia, Christina B.
Grusak, Michael A.
author_sort Garcia, Christina B.
collection PubMed
description Enhancing nutrient density in legume seeds is one of several strategies being explored to improve the nutritional quality of the food supply. In order to develop crop varieties with increased seed mineral concentration, a more detailed understanding of mineral translocation within the plant is required. By studying mineral accumulation in different organs within genetically diverse members of the same species, it may be possible to identify variable traits that modulate seed mineral concentration. We utilized two ecotypes (A17 and DZA315.16) of the model legume, Medicago truncatula, to study dry mass and mineral accumulation in the leaves, pod walls, and seeds during reproductive development. The pod wall dry mass was significantly different between the two ecotypes beginning at 12 days after pollination, whereas there was no significant difference in the average dry mass of individual seeds between the two ecotypes at any time point. There were also no significant differences in leaf dry mass between ecotypes; however, we observed expansion of A17 leaves during the first 21 days of pod development, while DZA315.16 leaves did not display a significant increase in leaf area. Mineral profiling of the leaves, pod walls, and seeds highlighted differences in accumulation patterns among minerals within each tissue as well as genotypic differences with respect to individual minerals. Because there were differences in the average seed number per pod, the total seed mineral content per pod was generally higher in A17 than DZA315.16. In addition, mineral partitioning to the seeds tended to be higher in A17 pods. These data revealed that mineral retention within leaves and/or pod walls might attenuate mineral accumulation within the seeds. As a result, strategies to increase seed mineral content should include approaches that will enhance export from these tissues.
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spelling pubmed-45363872015-08-28 Mineral accumulation in vegetative and reproductive tissues during seed development in Medicago truncatula Garcia, Christina B. Grusak, Michael A. Front Plant Sci Plant Science Enhancing nutrient density in legume seeds is one of several strategies being explored to improve the nutritional quality of the food supply. In order to develop crop varieties with increased seed mineral concentration, a more detailed understanding of mineral translocation within the plant is required. By studying mineral accumulation in different organs within genetically diverse members of the same species, it may be possible to identify variable traits that modulate seed mineral concentration. We utilized two ecotypes (A17 and DZA315.16) of the model legume, Medicago truncatula, to study dry mass and mineral accumulation in the leaves, pod walls, and seeds during reproductive development. The pod wall dry mass was significantly different between the two ecotypes beginning at 12 days after pollination, whereas there was no significant difference in the average dry mass of individual seeds between the two ecotypes at any time point. There were also no significant differences in leaf dry mass between ecotypes; however, we observed expansion of A17 leaves during the first 21 days of pod development, while DZA315.16 leaves did not display a significant increase in leaf area. Mineral profiling of the leaves, pod walls, and seeds highlighted differences in accumulation patterns among minerals within each tissue as well as genotypic differences with respect to individual minerals. Because there were differences in the average seed number per pod, the total seed mineral content per pod was generally higher in A17 than DZA315.16. In addition, mineral partitioning to the seeds tended to be higher in A17 pods. These data revealed that mineral retention within leaves and/or pod walls might attenuate mineral accumulation within the seeds. As a result, strategies to increase seed mineral content should include approaches that will enhance export from these tissues. Frontiers Media S.A. 2015-08-14 /pmc/articles/PMC4536387/ /pubmed/26322063 http://dx.doi.org/10.3389/fpls.2015.00622 Text en Copyright © 2015 Garcia and Grusak. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Garcia, Christina B.
Grusak, Michael A.
Mineral accumulation in vegetative and reproductive tissues during seed development in Medicago truncatula
title Mineral accumulation in vegetative and reproductive tissues during seed development in Medicago truncatula
title_full Mineral accumulation in vegetative and reproductive tissues during seed development in Medicago truncatula
title_fullStr Mineral accumulation in vegetative and reproductive tissues during seed development in Medicago truncatula
title_full_unstemmed Mineral accumulation in vegetative and reproductive tissues during seed development in Medicago truncatula
title_short Mineral accumulation in vegetative and reproductive tissues during seed development in Medicago truncatula
title_sort mineral accumulation in vegetative and reproductive tissues during seed development in medicago truncatula
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4536387/
https://www.ncbi.nlm.nih.gov/pubmed/26322063
http://dx.doi.org/10.3389/fpls.2015.00622
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