| Autor: |
Noé Cochetel, Grant R. Cramer, Ryan Ghan, Felipe H. Barrios-Masias, Saied Habibsadeh, John P. Baggett, Haley S. Toups, M.L. Robinson |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
OENO One, Vol 55, Iss 4 (2021) |
| ISSN: |
2494-1271 |
| DOI: |
10.20870/oeno-one.2021.55.4.4795 |
| Popis: |
Moderate levels of Cl- have been associated with grapevine salt tolerance. The hypothesis to be tested in this work is: photosynthesis in grapevine is negatively correlated with foliar Cl- concentration. To further test this hypothesis, multiple mild salinity experiments on four different Vitis genotypes (Cabernet-Sauvignon, Riparia Gloire, Ramsey and SC2) were conducted and photosynthesis, ion concentrations and gene expression responses were quantified. The salt-tolerant rootstock Ramsey had greater Cl- exclusion capabilities than V. vinifera cultivars both during rooted cutting greenhouse experiments and three years of field-grafted experiments; SC2 also excluded Cl-. Differential gene expression indicated that salinity affected transcript abundance more in salt-sensitive genotypes (97.7 % of DEGs in the dataset), especially chloroplast-related transcripts. The transcript abundances of known anion transporters were determined and a family of putative B transporters was associated with the Cl- exclusion phenotype. Photosynthesis and growth were maintained in Ramsey and SC2 under mild salinity. However, photosynthesis declined in Cabernet-Sauvignon with isosmotic 20 mM salt concentrations of NaCl, KCl or NaNO3, independent of the salt type. While foliar Cl- concentrations did correlate with salt tolerance during control and NaCl conditions, it was not found to be the cause of photosynthetic decline in Vitis during mild salinity. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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