Role of reactive oxygen and nitrogen species in the response of Prunus spp. to bicarbonate


Autoria(s): Cellini, Antonio
Contribuinte(s)

Masia, Andrea

Data(s)

19/05/2010

Resumo

In calcareous soils, which are a large share of agricultural soils worldwide, iron availability is limited. Consequently, the whole plant physiology is affected, because of the key role of iron in redox metabolism, resulting in reduced crop yield and quality. Peach cultivation is economically important in northern Italy, and is easily subjected to iron chlorosis. The management of iron nutrition in peach includes grafting on bicarbonate-tolerant rootstocks; other forms of management may be expensive and environmentally impacting. Four genotypes, used as rootstocks for peach and characterized by different degrees of tolerance to chlorosis, were tested in vitro on optimal and bicarbonate-enriched medium. Their redox status and antioxidant responses were assayed; the production and possible roles of nitric oxide (NO) and related compounds were also studied. The most sensitive genotypes show a stronger reduction of the antioxidant enzymatic activities and an increased oxidative stress. A high production of NO was found to be associated to resistant genotypes, whereas sensitive genotypes reacted to stress by downregulating nitrosoglutathione reductase activity. Therefore, NO is proposed to improve the internal iron availability, or to stimulate iron intake.

Formato

application/pdf

Identificador

http://amsdottorato.unibo.it/2530/1/cellini_antonio_tesi.pdf

urn:nbn:it:unibo-1926

Cellini, Antonio (2010) Role of reactive oxygen and nitrogen species in the response of Prunus spp. to bicarbonate, [Dissertation thesis], Alma Mater Studiorum Università di Bologna. Dottorato di ricerca in Colture arboree ed agrosistemi forestali ornamentali e paesaggistici <http://amsdottorato.unibo.it/view/dottorati/DOT341/>, 22 Ciclo. DOI 10.6092/unibo/amsdottorato/2530.

Idioma(s)

en

Publicador

Alma Mater Studiorum - Università di Bologna

Relação

http://amsdottorato.unibo.it/2530/

Direitos

info:eu-repo/semantics/openAccess

Palavras-Chave #AGR/03 Arboricoltura generale e coltivazioni arboree
Tipo

Tesi di dottorato

NonPeerReviewed