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Metabolic analysis revealed altered amino acid profiles in Lupinus albus organs due to boron deficiency.
MedLine Citation:
PMID:  21338372     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
We analysed the changes in the metabolites of Lupinus albus organs (leaf-blades, petioles, apexes, hypocotyls and roots) as a consequence of B deficiency. The deficiency did not affect malate concentration and induced only minor changes in the sugars content, suggesting that the carbohydrate metabolism is little affected by the deficiency. Contrarily, marked changes in the content of free amino acids were observed, with some specific variations associated with the different organs. These changes indicate that various aspects of metabolism implicated in the amino acid accumulation were affected by B deficiency. Most of the detected changes appear to have implications with some stress responses or signalling processes. Asparagine and proline that increase in many stresses also accumulated in petioles, apexes and hypocotyls. Accumulation of GABA shunt amino acids, indicative of production of reactive oxygen species, occurs in the same three organs and also roots. The increase in the branched-chain amino acids, observed in all organs, suggests the involvement of B with the cytoskeleton, while glycine decrease in leaf-blades and active growing organs (apexes and roots) could be associated with the proposed role of this amino acids in plant signalling in processes that might be associated with the decreased growth rates observed in B deficiency. Despite the admitted importance of free amino acids in plant metabolism, the available information on this matter is scarce. So our results bring new information concerning the effects of B deficiency in the metabolism of the several L. albus organs.
Authors:
Marta Alves; Paula Chicau; Helena Matias; José Passarinho; Carla Pinheiro; Cândido Pinto Ricardo
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-2-21
Journal Detail:
Title:  Physiologia plantarum     Volume:  -     ISSN:  1399-3054     ISO Abbreviation:  -     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-2-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  1256322     Medline TA:  Physiol Plant     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © Physiologia Plantarum 2011.
Affiliation:
Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal Instituto Nacional de Recursos Biológicos/L-INIA, Av. da República, 2784-505 Oeiras, Portugal.
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