Effect of Sodium Chloride on Soluble Protein, Nitrate Reductase Activity, Proline and Catalase Enzyme Activity of Green Gram Cultivars (Co6 And Co8)

Karuppasamy, Krishna Surendar; Kumar, Surendra; Krishnakumar, Subramanian; Varshini, V.; Susithra, N.; Kavitha, S.; Rajendran, V.

doi:10.5376/lgg.2014.05.0005

Cited by 1 publication

(1 citation statement)

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“…Plants exposed to high concentrations of salt experience osmotic stress, which leads to water deficits and unhealthy growth. These factors negatively affect the physiological and metabolic processes of plants, such as photosynthesis, respiration, and cell division [20][21][22][23]. The accumulation of sodium (Na + ) and chloride (Cl − ) in plants prevents the intake of nutrients (K + , Ca ++ , Mg ++ , and NO 3− ) and leads to reductions in vegetative growth and yield [24,25].…”

Section: Introductionmentioning

confidence: 99%

The Impact of Salinity and Nutrient Regimes on the Agro-Morphological Traits and Water Use Efficiency of Tomato under Hydroponic Conditions

Madugundu,

Al-Gaadi,

Tola

et al. 2023

Applied Sciences

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The effects of saline water on three greenhouse tomato cultivars (Feisty-Red, Ghandowra-F1, and Valouro-RZ) under three salinity concentrations (S1, ~2.5 dS m−1; S2, ~6.0 dS m−1; and ~9.0 dS m−1) and four nutrient regimes (N1–N4) were studied by evaluating the vegetative growth, chlorophyll content, leaf area, water use efficiency (WUE), and fruit yield of the cultivars. Vegetative growth parameters, such as plant height, leaf area, and stem diameter, were negatively correlated with increased levels of salinity. Also, the lowest WUE was noted for the high-salinity (~9.0 dS m−1) treatments. The Valouro-RZ cultivar performed better in terms of vegetative growth parameters when compared to both the Ghandowra-F1 and Feisty-Red cultivars. The plants grafted onto Maxifort rootstock showed more tolerance to salinity stress, with significant differences in plant growth, tomato yield, and WUE when compared with the non-grafted plants. The use of a modified nutrient solution (N2) in combination with moderately saline water (S2, ~6.0 dS m−1) resulted in a high mean yield (30.7 kg m−2), with a reduction of about ~1.6% compared with the mean yield of the control (i.e., the combination of S1 and N1), which was estimated to be about 31.2 kg m−2. High salinity significantly affected the mean WUE, which was the highest at 31.3 kg m−3 for the control plants (low salinity—S1), followed by the moderate-salinity (S2) plants at 30.4 kg m−3, and the lowest mean WUE was recorded for the high-salinity (S3) plants at 17.7 kg m−3. These results indicate that a combination of grafting onto rootstocks and using an appropriate nutrient recipe (i.e., N2 in this study) can mitigate the negative effects of salt stress on tomato plants grown under hydroponic conditions.

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