Nickel toxicity pretreatment attenuates salt stress by activating antioxidative system and ion homeostasis in tomato (Solanum lycopersicon L.): an interplay from mild to severe stress
- 8 August 2022
- journal article
- research article
- Published by Springer Science and Business Media LLC in Environmental Geochemistry and Health
- Vol. 45 (1), 227-246
- https://doi.org/10.1007/s10653-022-01336-3
Abstract
Plants antioxidative system is the first line of defense against oxidative stress caused secondarily by toxic ions under salinity. Plants with pre-activated antioxidative system can better adapt to salinity and can result in higher growth and yield. The current experiment was conducted to assess the adaptation of two tomato genotypes (Riogrande and Green Gold) with pre-activated antioxidative enzymes against salt stress. Tomato seedlings were exposed to mild stress (Ni: 0, 15 and 30 mg L−1) for three weeks to activate the antioxidative enzymes. The seedlings with pre-activated antioxidative enzymes were then grown under severe stress in hydroponics (0, 75 and 150 mM NaCl) and soil (control, 7.5 and 15 dS m−1) to check the adaptation, growth and yield. The results showed that Ni toxicity significantly enhanced activities of antioxidant enzymes (SOD, CAT, APX and POX) in both the genotypes and reduced growth with higher values in genotype Riogrande than Green Gold. The seedlings with pre-activated antioxidant enzymes showed better growth, low Na+ and high K+ uptake and maintained higher antioxidative enzymes activity than non-treated seedlings after four weeks of salt stress treatment in hydroponics. Similarly, the results in soil salinity treatment of the Ni pretreated seedlings showed higher yield characteristics (fruit yield per plant, average fruit weight and fruit diameter) than non-treated seedlings. However, Ni pretreatment had nonsignificant effect on tomato fruit quality characteristics like fruit dry matter percentage, total soluble solids, fruit juice pH and titratable acidity. The genotype Riogrande showed better growth, yield and fruit quality than Green Gold due to higher activity of antioxidant enzymes and better ion homeostasis as a result of Ni pretreatment. The results suggest that pre-activation antioxidant enzymes by Ni treatment proved to be an effective strategy to attenuate salt stress for better growth and yield of tomato plants.Keywords
This publication has 36 references indexed in Scilit:
- The interaction of plant biotic and abiotic stresses: from genes to the fieldJournal of Experimental Botany, 2012
- Oxidative stress protection and stomatal patterning as components of salinity tolerance mechanism in quinoa (Chenopodium quinoa)Physiologia Plantarum, 2012
- Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) plants grown at various salinity levelsJournal of Experimental Botany, 2010
- Functions and Toxicity of Nickel in Plants: Recent Advances and Future ProspectsCLEAN - Soil, Air, Water, 2009
- Relationship between salt tolerance and photosynthetic machinery performance in citrusEnvironmental and Experimental Botany, 2008
- Relationship between the photosynthetic activity and the performance of Cakile maritima after long‐term salt treatmentPhysiologia Plantarum, 2008
- Salt stress response in tomato beyond the salinity tolerance thresholdEnvironmental and Experimental Botany, 2007
- Differences in antioxidant activity in response to salinity stress in tolerant and susceptible wheat genotypesBiologia plantarum, 2005
- Contrasting adaptations to drought stress in field-grown Ziziphus mauritiana and Prunus persica trees: water relations, osmotic adjustment and carbon isotope compositionFunctional Plant Biology, 2000
- Structure and function of the TRP3 gene of Saccharomyces cerevisiae: Analysis of transcription, promoter sequence, and sequence coding for a glutamine amidotransferaseCurrent Genetics, 1984