Publication:
A proteomic approach reveals new actors of nodule response to drought in split-root grown pea plants

Date

2014

Director

Publisher

Wiley
Acceso abierto / Sarbide irekia
Artículo / Artikulua
Versión aceptada / Onetsi den bertsioa

Project identifier

MICINN//AGL2011-30386-C02-01/ES/recolecta
MICINN//AGL2011-23738/ES/recolecta

Abstract

Drought is considered the more harmful abiotic stress resulting in crops yield loss. Legumes in symbiosis with rhizobia are able to fix atmospheric nitrogen. Biological nitrogen fixation (SNF) is a very sensitive process to drought and limits legumes agricultural productivity. Several factors are known to regulate SNF including oxygen availability to bacteroids, carbon and nitrogen metabolisms; but the signalling pathways leading to SNF inhibition are largely unknown. In this work, we have performed a proteomic approach of pea plants grown in split-root-system where one half of the root was well-irrigated and the other was subjected to drought. Water stress locally provoked nodule water potential decrease that led to SNF local inhibition. The proteomic approach revealed 11 and 7 nodule proteins regulated by drought encoded by P. sativum and R. leguminosarum genomes respectively. Among these 18 proteins, three proteins related to flavonoid metabolism, two to sulphur metabolism and three RNA-binding proteins were identified. These proteins could be molecular targets for future studies focused on the improvement of legumes tolerance to drought. Moreover, this work also provides new hints for the deciphering of SNF regulation machinery in nodules.

Description

Keywords

Drought, Nodule response, Symbiotic nitrogen fixation, Split-root system, Pea plants, Proteomic approach

Department

Ciencias del Medio Natural / Natura Ingurunearen Zientziak

Faculty/School

Degree

Doctorate program

item.page.cita

Irar, S., González, E. M., Arrese-Igor, C., & Marino, D. (2014). A proteomic approach reveals new actors of nodule response to drought in split-root grown pea plants. Physiologia Plantarum, 152(4), 634-645.

item.page.rights

© 2014 Scandinavian Plant Physiology Society

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