QTL analysis for sugar‐regulated leaf senescence supports flowering‐dependent and ‐independent senescence pathways - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue New Phytologist Année : 2009

QTL analysis for sugar‐regulated leaf senescence supports flowering‐dependent and ‐independent senescence pathways

Résumé

P>The aim of this work was to determine the genetic basis of sugar-regulated senescence and to explore the relationship with other traits, including flowering and nitrogen-use efficiency. Quantitative trait loci (QTLs) for senescence were mapped in the Arabidopsis Bay-0 x Shahdara recombinant-inbred line (RIL) population after growth on glucose-containing medium, which accelerates senescence. The extent of whole-rosette senescence was determined by imaging the maximum quantum yield of photosystem II (F-v/F-m). A major QTL on the top of chromosome 4 colocalized with FRI, a major determinant of flowering. This QTL interacted epistatically with a QTL on chromosome 5, where the floral repressor FLC localizes. Vernalization accelerated senescence in late-flowering lines with functional FRI and FLC alleles. Comparison with previous results using the Bay-0 x Shahdara population showed that rapid rosette senescence on glucose-containing medium was correlated with early flowering and high sugar content in compost-grown plants. In addition, correlation was found between the expression of flowering and senescence-associated genes in Arabidopsis accessions. However, an additional QTL on chromosome 3 was not linked to flowering, but to nitrogen-use efficiency. The results show that whole-rosette senescence is genetically linked to the vernalization-dependent control of flowering, but is also controlled by flowering-independent pathways.

Dates et versions

hal-04495825 , version 1 (21-03-2024)

Identifiants

Citer

Astrid Wingler, Sarah Jane Purdy, Sally‐anne Edwards, Fabien Chardon, Céline Masclaux‐daubresse. QTL analysis for sugar‐regulated leaf senescence supports flowering‐dependent and ‐independent senescence pathways. New Phytologist, 2009, 185, pp.420 - 433. ⟨10.1111/j.1469-8137.2009.03072.x⟩. ⟨hal-04495825⟩

Collections

INRA INRAE
0 Consultations
1 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More