Short term response of grapevine grown hydroponically to salinity: Mineral composition and growth parameters
Keywords:grapevine, salt tolerance, ion content, proline, total chlorophyll
The response of hydroponically grown four ownrooted table grape (Vitis vinifera L.) cultivars ('Red Rishbaba', 'Red Sahebi', 'Dastarchin' and 'Red Sultana') to different salt concentrations (0, 25, 50 and 100 mM NaCl) was studied under greenhouse condition. Growth parameters, total chlorophyll (a+b) and proline contents were determined in leaves and roots. Cl-, Na+, K+ and NO3 - concentrations were measured in lamina, petiole, stem and root. Shoot growth, total dry weight, total leaf chlorophyll (a+b), NO3 --N and K+ contents were significantly reduced (P≤0.05) under NaCl stress, whereas proline, Cl- and Na+ accumulation increased significantly with increasing salinity. 'Red Rishbaba' and 'Red Sahebi' showed a less decrease in total leaf chlorophyll, K+ and NO3 - contents, while proline accumulation in these cultivars was higher than that of 'Dastarchin' and 'Red Sultana'. Also, shoots of 'Red Sahebi' and 'Red Rishbaba' accumulated lower Cl- and Na+ than other cultivars. In conclusion, the overall results showed that 'Red Rishbaba' and 'Red Sahebi' were more tolerant than 'Dastarchin' and 'Red Sultana'.
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