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Hydroponic assessment of tomato genotypes against salt stress


The International Journal of Biological Research (TIJOBR)

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Submitted Accepted Published
Jun 05,2018 Jan 02,2019 Jan 27,2019

2019 / Vol: 2 / Issue: 1


Abstract


The present study was performed for the assessment of tomato genotypes under normal and saline conditions in hydroponic culture. Six genotypes viz Naqeeb, Marmande, SP-5, SP-6, LA2661 and Nagina were used in this experiment. Two replication of each genotype was used in different water tubs. Three treatments (T0= Controlled, T1=150Mm NaCl, T2= 300Mm NaCl) was used in hydroponic system. For this purpose, Tomato genotypes were transplanted in water tubs each having capacity of 200 liters. Hoagland’s solution was set in distilled water which was used to give nutrient to tomato genotypes. The data was recorded after 90 days of seedling transplantation for plant height, number of nodes, number of fruits, fresh weight of root and shoot, lycopene, beta carotene, chlorophyll a and b. Analysis of variance of all the traits showed significant differences, which revealed that different genotypes showed variations against salinity stress. For plant height the maximum plant height was shown by LA2661 (172 cm) in control, Marmande (172.9 cm and180.25 cm) at 150 mM and 300mM saline conditions respectively. LA2661 showed higher number of nodes under normal and saline conditions (31.5, 33.5 & 31.5 at T0, T1 & T2 respectively). The genotype Marmande showed maximum number of fruits (16.5) in control conditions, LA2661 showed maximum number of fruits 9.5 at 150 mM NaCl and SP-5 showed higher number of fruits 11.5 at 300mM saline conditions. The genotype LA2661 showed higher fresh shoot weight (70.5 g) at T0, SP-6 showed maximum fresh shoot weight 77.5 g at T1, Nagina showed higher fresh shoot weight 69.5 g at T2 respectively. Over all LA2661 higher fresh shoot weight under all treatments. The genotype Nagina showed higher fresh root weight (60.90, 62.5, 70.1 g at T0, T1 & T2) respectively. For chlorophyll a  Nagina showed higher chlorophyll a (0.315) followed by LA2661 (0.155). The genotype Marmande showed lower chlorophyll a (0.015) under control conditions.  At 150 mM NaCl the genotype Marmande showed maximum chlorophyll a (0.235) followed by SP-6 (0.16).  The genotype Naqeeb showed lower chlorophyll a (0.015) under 150 mM saline conditions. The genotype Naqeeb showed higher chlorophyll 0.235 and SP-6 showed lower chlorophyll a (0.035) at 300mM saline conditions. In control conditions the genotype Marmande showed higher chlorophyll b (0.73).  At 150 mM NaCl the genotype LA2661 showed maximum chlorophyll b (0.5) and Naqeeb showed lower chlorophyll b (0.015) content. The genotype Naqeeb showed higher chlorophyll b 0.447 and SP-6 showed lower chlorophyll b (0.059) at 300mM saline conditions. In control conditions the genotype SP-5 showed higher lycopene (0.345) and Marmande showed lower lycopene content (0.0435) under control conditions. The genotype Marmande showed maximum lycopene (0.6045) and LA2661 showed lower lycopene (0.0244) under 150 mM saline conditions. The genotype SP-6 and Nagina showed higher lycopene 0.3025 and Marmande showed lower lycopene content (0.0625) at 300mM saline conditions. In control conditions the genotype LA2661 showed higher β carotene (0.1527) and SP-5 showed lower β carotene (0.003) under control conditions.  At 150 mM NaCl the genotype SP-5 showed maximum β carotene (0.656) and LA2661 and Naqeeb showed lower β carotene (0.0069) under 150 mM saline conditions. The genotype Naqeeb showed higher β carotene 0.2125 and Nagina showed lower β carotene content (0.0125) at 300mM saline conditions.

Key words: salinity, tomato growth, hydroponic culture


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