Early growth stage characterization and the biochemical responses for salinity stress in tomato
KAUST DepartmentBiological and Environmental Science and Engineering (BESE) Division
Center for Desert Agriculture
The Salt Lab
Permanent link to this recordhttp://hdl.handle.net/10754/668711
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AbstractSalinity is one of the most significant environmental stresses for sustainable crop production in major arable lands of the globe. Thus, we conducted experiments with 27 tomato genotypes to screen for salinity tolerance at seedling stage, which were treated with non-salinized (S1) control (18.2 mM NaCl) and salinized (S2) (200 mM NaCl) irrigation water. In all genotypes, the elevated salinity treatment contributed to a major depression in morphological and physiological character-istics; however, a smaller decrease was found in certain tolerant genotypes. Principal component analyses (PCA) and clustering with percentage reduction in growth parameters and different salt tolerance indices classified the tomato accessions into five key clusters. In particular, the tolerant genotypes were assembled into one cluster. The growth and tolerance indices PCA also showed the order of salt-tolerance of the studied genotypes, where Saniora was the most tolerant genotype and P.Guyu was the most susceptible genotype. To investigate the possible biochemical basis for salt stress tolerance, we further characterized six tomato genotypes with varying levels of salinity tolerance. A higher increase in proline content, and antioxidants activities were observed for the salt-tolerant genotypes in comparison to the susceptible genotypes. Salt-tolerant genotypes identified in this work herald a promising source in the tomato improvement program or for grafting as scions with improved salinity tolerance in tomato.
CitationAlam, M. S., Tester, M., Fiene, G., & Mousa, M. A. A. (2021). Early Growth Stage Characterization and the Biochemical Responses for Salinity Stress in Tomato. Plants, 10(4), 712. doi:10.3390/plants10040712
SponsorsThe research was supported by Deanship of Graduate Studies of King Abdulaziz University, Jeddah, and Ministry of Education of Kingdom of Saudi Arabia. This research received no external funding.
The authors acknowledge the study and research support from International Post-Graduate Scholarship (student id 1801817) of King Abdulaziz University, Jeddah, Saudi Arabia, and research support from King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia. Technical support from Md Arfan Ali, Farooq Abdul Sattar, Md Golap Hossain, and Md Nurul Huda of the Department of Arid Land Agriculture, KAU, are gratefully acknowledged.
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