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http://hdl.handle.net/1843/37197
Tipo: | Artigo de Periódico |
Título: | Are calcium oxalate crystals a dynamic calcium store in plants? |
Autor(es): | Elder Antônio Sousa e Paiva |
Resumo: | Calcium oxalate (CaOx) crystals occur as intravacuolar deposits in most angiosperm species. Different functions have been attributed to these crystals, some of which are very speculative, until now. Calcium regulation and homeostasis seem to be the most widespread function of CaOx crystals. Being rich in calcium, these crystals constitute a reserve of calcium for plants. However, despite being bioavailable, this reserve is functional in just a few situations due to the low mobility of calcium for phloem translocation. Therefore,CaOxcrystals as a calcium reserve is a paradox because in most cases the reserve cannot be used. However, in most plants, these crystals occur in organs or tissues that will be discarded, which allows the elimination of excess calcium. This suggests that CaOx crystals have a functional role in excess calcium excretion. There is some evidence that, for calcium, this excretory function is relevant for plants since they lack an excretory system dedicated to discarding solid wastes, such as calcium salts. |
Assunto: | Oxalato de cálcio Floema Magnoliopsida |
Idioma: | eng |
País: | Brasil |
Editor: | Universidade Federal de Minas Gerais |
Sigla da Instituição: | UFMG |
Departamento: | ICB - DEPARTAMENTO DE BOTÂNICA |
Tipo de Acesso: | Acesso Aberto |
Identificador DOI: | https://doi.org/10.1111/nph.15912 |
URI: | http://hdl.handle.net/1843/37197 |
Data do documento: | 2019 |
metadata.dc.relation.ispartof: | New phytologist |
Aparece nas coleções: | Artigo de Periódico |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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Are calcium oxalate crystals a dynamic calcium store in plants.pdf | 313.79 kB | Adobe PDF | Visualizar/Abrir |
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