Abstract:
:Tomato cell wall-associated kinase 1 (SlWAK1) has only been studied in biotic stress response and hence its function in abiotic stress remains unknown. In a screening under salinity of an insertional mutant collection of tomato (Solanum lycopersicum L.), a mutant exhibiting lower degree of leaf chlorosis than wild type (WT) together with reduced leaf Na+ accumulation was selected. Genetic analysis of the mutation revealed that a single T-DNA insertion in the SlWAK1 gene was responsible of the mutant phenotype. Slwak1 null mutant reduced its shoot growth compared with WT, despite its improved Na+ homeostasis. SlWAK1 disruption affected osmotic homeostasis, as leaf water content was lower in mutant than in WT under salt stress. In addition, Slwak1 altered the source-sink balance under salinity, by increasing sucrose content in roots. Finally, a significant fruit yield reduction was found in Slwak1 vs. WT under long-term salt stress, mainly due to lower fruit weight. Our results show that disruption of SlWAK1 induces a higher sucrose transport from source leaf to sink root, negatively affecting fruit, the main sink at adult stage.
journal_name
Int J Mol Scijournal_title
International journal of molecular sciencesauthors
Meco V,Egea I,Ortíz-Atienza A,Drevensek S,Esch E,Yuste-Lisbona FJ,Barneche F,Vriezen W,Bolarin MC,Lozano R,Flores FBdoi
10.3390/ijms21176308subject
Has Abstractpub_date
2020-08-31 00:00:00issue
17issn
1422-0067pii
ijms21176308journal_volume
21pub_type
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