Salinity thresholds and genotypic variability of cabbage (Brassica oleracea L.) grown under saline stress

Abstract

Higher antioxidative enzymatic activities in Savoy versus White cabbage after treatment with 100 mmol L(-1) NaCl were associated with improved water relations, thus suggesting a possible physiological pathway for alleviating perceived salt stress.

Nutritional, Biophysical and Physiological Characteristics of Wild Rocket Genotypes As Affected by Soilless Cultivation System, Salinity Level of Nutrient Solution and Growing Period

“…However, in agreement with similar experiments on sage (Taârit et al, 2012), cabbage (Sanoubar et al, 2016), and tomato (Krauss et al, 2006), we observed a positive relationship between antioxidant compound levels and medium EC, only up to a threshold (EC3.5) with no further improvements with the highest salinity (EC4.5) (Tables 2, 3), probably due to the concomitant increase in leaf chloride content (Table 2). …”

Leaf sodium accumulation facilitates salt stress adaptation and preserves photosystem functionality in salt stressed Ocimum basilicum

“…Higher Polyphenol Oxidase concentrations, for example, could facilitate ROS scavenging, which in turn would not act as stress signal for ABA production. This possibility has been also proposed by Sanoubar et al (2016). A constitutive higher concentration of antioxidants in GEN vs. other basil cultivars has been also documented by Nguyen et al (2010).…”

Comparative Performance of Multivariable Agro-Physiological Parameters for Detecting Salt Tolerance of Wheat Cultivars under Simulated Saline Field Growing Conditions

“…Since stomata are the main entrance points for CO 2 uptake for photosynthesis and water evaporation from the leaves (transpiration), disturbed stomatal conductance leads to trouble in rates of photosynthesis and transpiration (Vysotskaya et al, 2010; Saqib et al, 2013). Because of this closed circuit between these physiological process, most parameters related to leaf water relations and photosynthesis have been routinely and effectively used as selection criteria for evaluating salt tolerance in a number of crops, such as wheat (Ashraf and Shahbaz, 2003; El-Hendawy et al, 2007; Munns and Tester, 2008; Saqib et al, 2013; Ashraf and Ashraf, 2015; Oyiga et al, 2016), barley and faba bean (Jiang et al, 2006; Tavakkoli et al, 2010; Vysotskaya et al, 2010), chickpea (Flowers et al, 2010), rice (Sanni et al, 2012), quinoa (Razzaghi et al, 2011), brassica (Singh et al, 2010), sunflower (Siddiqi and Ashraf, 2008), and cotton (Zhang et al, 2014). In this study, mild and moderate salinity levels induced a significant reduction in leaf water and osmotic potentials (the values of both parameters becoming more negative), stomatal conductance, photosynthesis rate, and transpiration rate.…”

“…Therefore, the success of genotypes in adapting to low soil water potential is associated with their ability to lower the leaf water potential sufficiently to increase water uptake. The genotypes can reduce their water potential by decreasing the leaf osmotic potential, either through the accumulation of inorganic ions, or through the synthesis of organic osmolytes (Hasegawa et al, 2000; Nawaz et al, 2010; Singh et al, 2010). Active accumulation of osmotic adjustment components under salt stress helps the plant to maintain higher leaf turgor, which is one of the main mechanisms for ensuring water uptake and enhancing plant growth under salinity conditions (Pérez-López et al, 2009; Ashraf and Ashraf, 2015).…”