Person:
Cobos Porras, Inmaculada Libertad

Profile Picture

Email Address

person.page.identifierURI

https://academica-e.unavarra.es/handle/2454/50863

Birth Date

Research Projects

Organizational Units

Job Title

Last Name

Cobos Porras

First Name

Inmaculada Libertad

person.page.departamento

Ciencias del Medio Natural

person.page.instituteName

IMAB. Research Institute for Multidisciplinary Applied Biology

ORCID

person.page.upna

811139

Name

Filters

20211
Reset filters

Settings

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    PublicationOpen Access
    Increased ascorbate biosynthesis does not improve nitrogen fixation nor alleviate the effect of drought stress in nodulated Medicago truncatula plants
    (Frontiers Media, 2021) Cobos Porras, Inmaculada Libertad; Rubia Galiano, María Isabel; Huertas, Raúl; Kum, David; Dalton, David A.; Udvardi, Michael; Arrese-Igor Sánchez, César; Larrainzar Rodríguez, Estíbaliz; Institute for Multidisciplinary Research in Applied Biology - IMAB; Gobierno de Navarra / Nafarroako Gobernua, PC112-113 LEGUSI
    Legume plants are able to establish nitrogen-fixing symbiotic relations with Rhizobium bacteria. This symbiosis is, however, affected by a number of abiotic constraints, particularly drought. One of the consequences of drought stress is the overproduction of reactive oxygen (ROS) and nitrogen species (RNS), leading to cellular damage and, ultimately, cell death. Ascorbic acid (AsA), also known as vitamin C, is one of the antioxidant compounds that plants synthesize to counteract this oxidative damage. One promising strategy for the improvement of plant growth and symbiotic performance under drought stress is the overproduction of AsA via the overexpression of enzymes in the Smirnoff-Wheeler biosynthesis pathway. In the current work, we generated Medicago truncatula plants with increased AsA biosynthesis by overexpressing MtVTC2, a gene coding for GDP-L-galactose phosphorylase. We characterized the growth and physiological responses of symbiotic plants both under well-watered conditions and during a progressive water deficit. Results show that increased AsA availability did not provide an advantage in terms of plant growth or symbiotic performance either under well-watered conditions or in response to drought.