info:eu-repo/semantics/article
Root-Shoot Signaling crosstalk involved in the shoot growth promoting action of rhizospheric humic acids
Registro en:
Olaetxea, Maite; Mora, Maria Veronica; Calderin García, Andrés; Azevedo Santos, Leandro; Baigorri, Roberto; et al.; Root-Shoot Signaling crosstalk involved in the shoot growth promoting action of rhizospheric humic acids; Taylor & Francis; Plant Signaling and Behavior; 11; 4; 3-2016; 1-14
1559-2324
CONICET Digital
CONICET
Autor
Olaetxea, Maite
Mora, Maria Veronica
Calderin García, Andrés
Azevedo Santos, Leandro
Baigorri, Roberto
Fuentes, Marta Cecilia
Garnica, María
Louro Berbara, Ricardo Luis
Zamarreño, Angel Maria
Garcia Mina, Jose M.
Resumen
Numerous studies have shown the ability of humic substances to improve plant development. This action is normally reflected in an enhancement of crop yields and quality. However, the mechanisms responsible for this action of humic substances remain rather unknown. Our studies have shown that the shoot promoting action of sedimentary humic acids is dependent of its ability to increase root hydraulic conductivity through signaling pathways related to ABA, which in turn is affected in roots by humic acids in an IAA-NO dependent way. Furthermore, these studies also indicate that the primary action of humic acids in roots might also be physical, resulting from a transient mild stress caused by humic acids associated with a fouling-cleaning cycle of wall cell pores. Finally the role of alternative signal molecules, such as ROS, and corresponding signaling pathways are also discussed and modeled in the context of the above-mentioned framework. Fil: Olaetxea, Maite. Universidad de Navarra; España Fil: Mora, Maria Veronica. Universidad de Navarra; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina Fil: Calderin García, Andrés. Universidade Federal Rural do Rio de Janeiro; Brasil Fil: Azevedo Santos, Leandro. Universidade Federal Rural do Rio de Janeiro; Brasil Fil: Baigorri, Roberto. Universidad de Navarra; España Fil: Fuentes, Marta Cecilia. Universidad de Navarra; España Fil: Garnica, María. Universidad de Navarra; España Fil: Louro Berbara, Ricardo Luis. Universidade Federal Rural do Rio de Janeiro; Brasil Fil: Zamarreño, Angel Maria. Universidad de Navarra; España Fil: Garcia Mina, Jose M.. Universidad de Navarra; España
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