Comparative Studies on the Physiobiochemical, Enzymatic, and Ionic Modifications in Salt-tolerant and Salt-sensitive Citrus Rootstocks under NaCl Stress

• DOI: 10.21273/jashs.137.2.86
• Publication Date: 2019-01-31T18:51:29Z
• Authors: Rashad M. Balal; Muhammad M. Khan; Muhammad A. Shahid; Neil S. Mattson; Tahira Abbas; Muhammad Ashfaq; Franscisco Garcia...; Usman Ghazanfer; Vicente Gimeno; Zafar Iqbal
• Keywords: Stomatal Conductance

A study was conducted to investigate the morphological, physiobiochemical, enzymatic, and ionic differences among four cultivated citrus ( Citrus sp.) rootstocks with different salt tolerances. Two salt-tolerant [Rangpur lime C. limonia ) Rubidoux trifoliata )] two salt-sensitive [Carrizo citrange sinensis × Sanchton citrumello paradisi )], were subjected NaCl stress in greenhouse conditions. The 9-month-old plants exposed levels (0, 30, 60, or 90 m sand culture for 3 months. Plant biomass (fresh weight, dry root length, shoot leaf thickness), physiological attributes [number of stomata, stomatal size, number epidermal cells, photosynthesis rate, conductance g S ), water use efficiency, transpiration rate]. ion content (Na + , K Ca +2 Mg Cl – adversely affected by stress, but cultivars comparatively less affected. Salt also enhanced antioxidant enzyme activity (superoxide dismutase, catalase, peroxidase), particularly cultivars. accumulated greatest Na their leaves, whereas roots, an adaptation combat highly saline Overall, it concluded that tolerance is associated a greater differing accumulation patterns leaves roots; these can be considered potential indicators cultivar's sensitivity stress.