Different adaptation strategies of two citrus scion/rootstock combinations in response to drought stress
Citrus
http://aims.fao.org/aos/agrovoc/c_1647
F60 - Physiologie et biochimie végétale
Science
http://aims.fao.org/aos/agrovoc/c_27639
Plant Roots
F30 - Génétique et amélioration des plantes
http://aims.fao.org/aos/agrovoc/c_6653
Polyploidy
03 medical and health sciences
http://aims.fao.org/aos/agrovoc/c_2392
Gene Expression Regulation, Plant
http://aims.fao.org/aos/agrovoc/c_6857
Protein Interaction Maps
métabolisme
Plant Proteins
2. Zero hunger
0303 health sciences
http://aims.fao.org/aos/agrovoc/c_24993
http://aims.fao.org/aos/agrovoc/c_1637
Gene Expression Profiling
Q
http://aims.fao.org/aos/agrovoc/c_4769
R
greffon
15. Life on land
adaptation physiologique
http://aims.fao.org/aos/agrovoc/c_27527
Adaptation, Physiological
6. Clean water
résistance à la sécheresse
Droughts
porte greffe
http://aims.fao.org/aos/agrovoc/c_1070
Medicine
H50 - Troubles divers des plantes
Citrus sinensis
expression des gènes
stress dû à la sécheresse
Research Article
DOI:
10.1371/journal.pone.0177993
Publication Date:
2017-05-18T19:17:02Z
AUTHORS (7)
ABSTRACT
Scion/rootstock interaction is important for plant development and for breeding programs. In this context, polyploid rootstocks presented several advantages, mainly in relation to biotic and abiotic stresses. Here we analyzed the response to drought of two different scion/rootstock combinations presenting different polyploidy: the diploid (2x) and autotetraploid (4x) Rangpur lime (Citrus limonia, Osbeck) rootstocks grafted with 2x Valencia Delta sweet orange (Citrus sinensis) scions, named V/2xRL and V/4xRL, respectively. Based on previous gene expression data, we developed an interactomic approach to identify proteins involved in V/2xRL and V/4xRL response to drought. A main interactomic network containing 3,830 nodes and 97,652 edges was built from V/2xRL and V/4xRL data. Exclusive proteins of the V/2xRL and V/4xRL networks (2,056 and 1,001, respectively), as well as common to both networks (773) were identified. Functional clusters were obtained and two models of drought stress response for the V/2xRL and V/4xRL genotypes were designed. Even if the V/2xRL plant implement some tolerance mechanisms, the global plant response to drought was rapid and quickly exhaustive resulting in a general tendency to dehydration avoidance, which presented some advantage in short and strong drought stress conditions, but which, in long terms, does not allow the plant survival. At the contrary, the V/4xRL plants presented a response which strong impacts on development but that present some advantages in case of prolonged drought. Finally, some specific proteins, which presented high centrality on interactomic analysis were identified as good candidates for subsequent functional analysis of citrus genes related to drought response, as well as be good markers of one or another physiological mechanism implemented by the plants.
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CITATIONS (27)
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