INVESTIGADORES
MAIALE Santiago Javier
artículos
Título:
The alkaline tolerance in Lotus japonicus is associated with mechanisms of iron acquisition and modification of the architectural pattern of the root
Autor/es:
CAMPESTRE MARIA PAULA; ANTONELLI CRISTIAN; CALZADILLA PABLO; MAIALE SANTIAGO; RODRÍGUEZ ANDRÉS; RUIZ OSCAR
Revista:
JOURNAL OF PLANT PHYSIOLOGY
Editorial:
ELSEVIER GMBH
Referencias:
Año: 2016
ISSN:
0176-1617
Resumen:
The response offifty-four Lotus japonicus ecotypes, and of six selected ecotypes wasinvestigated under alkaline conditions. Sensitive, but not tolerant ecotypes, showed interveinal chlorosis under all alkalinity conditions and highmortality under extreme alkalinity. Interveinal chlorosis was associatedwith Fe deficiency, as a reduced Fe2+ shootcontent was observed in all sensitive ecotypes. In addition, some showed adecline in photosynthesis rate and PSII performance compared to the control. Incontrast, some tolerant ecotypes did not change these parameters betweentreatments. Alkaline tolerance could be explained by a mechanism of Feacquisition and a root structural modification. Thisconclusion was based on the fact that alltolerant, but not the sensitive ecotypes, presented high ferric reductase oxidase activity under alkaline stress compared to the control, and a Herringboneroot pattern modification. Onthis basis, the analysis of these mechanisms of alkaline tolerance could beused in screening programs for the selection of new tolerant genotypes in the Lotus genus.