Gibberellic acid and nitrogen efficiently protect early seedlings growth stage from salt stress damage in Sorghum

Abstract

Salinity one of environmental factor that limits the growth and productivity of crops. This research was done to investigate whether GA3 (0, 144.3, 288.7 and 577.5 μM) and nitrogen fertilizer (0, 90 and 135 kg N ha−1) could mitigate the negative impacts of NaCl (0, 100, and 200 mM NaCl) on emergence percentage, seedling growth and some biochemical parameters. The results showed that high salinity level decreased emergence percentage, seedling growth, relative water content, chlorophyll content (SPAD reading), catalase (CAT) and peroxide (POD), but increased soluble protein content, superoxide dismutase (SOD) activity and malondialdehyde (MDA) content. The SOD activity was decreased by nitrogen. However, the other measurements were increased by nitrogen. The interactive impact between nitrogen and salinity was significant in most parameters except EP, CAT and POD. The seedling length, dry weight, fresh weight, emergence percentage, POD, soluble protein and chlorophyll content were significantly affected by the interaction between GA3 and salinity. The GA3 and nitrogen application was successful mitigating the adverse effects of salinity. The level of 144.3 and 288.7 μm GA3 and the rate of 90 and 135 kg N ha−1 were most effective on many of the attributes studied. Our study suggested that GA3 and nitrogen could efficiently protect early seedlings growth from salinity damage.

Foliar Application of Salicylic Acid Improves Salt Tolerance of Sorghum (Sorghum bicolor (L.) Moench)

“…Salt stress reduces the contents of Chl a, Chl b, Chl a + b, and Car which causes a reduction in photosynthesis. In line with our results are other findings that salt stress reduces the chlorophyll content and inhibits chlorophyll biosynthesis in sorghum [55,56]. This happens by the inactivation of enzymes involved in the synthesis of photosynthetic pigments [57,58].…”

Effect of Saline-Nutrient Solution on Yield, Quality, and Shelf-Life of Sea Fennel (Crithmum maritimum L.) Plants

“…In our vision, sea fennel has the potential for more extensive cultivation and for the ready-to-eat market as a baby-leaf vegetable, due not only to its organoleptic characteristics but also to its richness in terms of health-promoting compounds and its suitability for cultivation in saline conditions, an important aspect for the Mediterranean environment. This aspect would be crucial since soil salinity is currently the most important environmental stress limiting crop production in arid and semi-arid areas [20], and, in the near future this trend is expected to worsen [21]. For this purpose, we evaluated the effect of the salinity level of the nutrient solution in a floating system on the growth, quality, and shelf-life of C. maritimum during a storage period.…”

The effect of salinity stress on germination parameters in Satureja thymbra L. (Lamiaceae)

“…Gibberellic acid is an important hormone in defending the plant against stress conditions (Alharby et al, 2021). Studies have shown that externally applied gibberellic acid can increase seed germination and salt tolerance of seeds (Chauhan et al, 2019;Oral et al, 2019;Ali et al, 2021). In this study, it was determined that the negative effect of salinity could be reduced by gibberellic acid pre-treatment.…”