Photosynthetica, 2014 (vol. 52), issue 1

Photosynthetica 2014, 52(1):57-62 | DOI: 10.1007/s11099-014-0007-z

Application of chlorophyll fluorescence to screen eggplant (Solanum melongena L.) cultivars for salt tolerance

S. Hanachi1,2, M. C. Van Labeke2,*, T. Mehouachi1
1 High Institute of Agriculture of Chott Meriam, Sousse, Tunisia
2 Department of Plant Production, Ghent University, Ghent, Belgium

The objective of this study was to investigate the relative salt tolerance of four eggplant cultivars (Solanum melongena L.) by studying chlorophyll (Chl) fluorescence parameters during the vegetative growth stage under increasing salinity levels. The plants were grown in pots filled with peat under controlled conditions and were subjected to the salt stress ranging from 0 (control), 20, 40, 80, and 160 mM NaCl for 25 days. The results showed that the increasing NaCl concentration affected hardly the maximum quantum yield of photosystem (PS) II. The quantum yield of PSII (ΦPSII) decreased significantly in 'Adriatica' and 'Black Beauty' under the salt stress. The photochemical quenching decreased in 'Black Beauty' and nonphotochemical quenching increased in 'Adriatica' under the salt stress. The Chl fluorescence parameters did not change significantly under the salt stress in 'Bonica' and 'Galine', revealing their tolerance to salinity. After 25 days of the salt stress, the plant growth was reduced in all cultivars, however, this decline was more pronounced in 'Adriatica' and 'Black Beauty'. Additionally, a significant correlation between the biomass and ΦPSII was observed in 'Adriatica' and 'Black Beauty'. Our results suggest that ΦPSII can be used as a diagnostic tool to identify salt-tolerant egg-plant cultivars.

Keywords: salt stress; biomass; photosystem II

Received: July 6, 2012; Accepted: June 11, 2013; Published: March 1, 2014Show citation

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Hanachi, S., Labeke, M.C., & Mehouachi, T. (2014). Application of chlorophyll fluorescence to screen eggplant (Solanum melongena L.) cultivars for salt tolerance. Photosynthetica, 52(1), 57-62. doi: 10.1007/s11099-014-0007-z.
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