Ragab S Taha1, Mahmoud F Seleiman2,3, Ashwag Shami4, Bushra Ahmed Alhammad5, Ayman H A Mahdi6. 1. Botany Department, Faculty of Agriculture, Beni-Suef University, Beni Suef 62521, Egypt. 2. Plant Production Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia. 3. Department of Crop Sciences, Faculty of Agriculture, Menoufia University, Shibin El-Kom 32514, Egypt. 4. Biology Department, College of Sciences, Princess Nourah bint Abdulrahman University, Riyadh 11617, Saudi Arabia. 5. Biology Department, College of Science and Humanity Studies, Prince Sattam Bin Abdulaziz University, Al Kharj Box 292, Riyadh 11942, Saudi Arabia. 6. Agronomy Department, Faculty of Agriculture, Beni-Suef University, Beni Suef 62521, Egypt.
Abstract
Selenium (Se) and silicon (Si) are considered advantageous elements to induce plants' tolerance to various environmental stresses. Wheat yield is negatively affected by salinity stress, especially in dry and semi-dry areas. Therefore, the objective of the current study was to investigate the effects of Se, Si and their combinations (0 as control, Se15, Se30, Si15, Si30, Se15 + Si15, and Se30 + Si30 mM) in alleviating the deleterious effects of salinity stress (7.61 dS m-1, real field conditions) on anatomical characteristics as well as the physio-biochemical and productivity parameters of wheat plants. The selenium and silicon treatments and their combinations caused significant amelioration in growth, anatomical and physiological attributes, and grain yields of salinity-stressed wheat in comparison with the untreated plants (control treatment). The integrated application of Se30 + Si30 significantly increased plant growth (i.e., plant height 28.24%, number of tillers m-2 76.81%, fresh weight plant-1 80.66%, and dry weight plant-1 79.65%), Fv/Fm (44.78%), performance index (PI; 60.45%), membrane stability index (MSI; 36.39%), relative water content (RWC; 29.39%), total soluble sugars (TSS; 53.38%), proline (33.74%), enzymatic antioxidants (i.e., CAT activity by 14.45%, GR activity by 67.5%, SOD activity by 35.37% and APX activity by 39.25%) and non-enzymatic antioxidants (i.e., GSH content by 117.5%, AsA content by 52.32%), yield and its components (i.e., number of spikelets spike-1 29.55%, 1000-grain weight 48.73% and grain yield ha-1 26.44%). The anatomical traits of stem and leaves were improved in wheat plants treated with Se30 + Si30. These changes resulting from the exogenous applications of Se, Si or their combinations, in turn, make these elements prospective in helping wheat plants to acclimate successfully to saline soil.
pan class="Chemical">Selenium (pan class="Chemical">Se) and silicon (Si) are considered advantageous elements to induce plants' tolerance to various environmental stresses. Wheat yield is negatively affected by salinity stress, especially in dry and semi-dry areas. Therefore, the objective of the current study was to investigate the effects of Se, Si and their combinations (0 as control, Se15, Se30, Si15, Si30, Se15 + Si15, and Se30 +Si30 mM) in alleviating the deleterious effects of salinity stress (7.61 dS m-1, real field conditions) on anatomical characteristics as well as the physio-biochemical and productivity parameters of wheat plants. The selenium and silicon treatments and their combinations caused significant amelioration in growth, anatomical and physiological attributes, and grain yields of salinity-stressed wheat in comparison with the untreated plants (control treatment). The integrated application of Se30 +Si30significantly increased plant growth (i.e., plant height 28.24%, number of tillers m-2 76.81%, fresh weight plant-1 80.66%, and dry weight plant-1 79.65%), Fv/Fm (44.78%), performance index (PI; 60.45%), membrane stability index (MSI; 36.39%), relative water content (RWC; 29.39%), total soluble sugars (TSS; 53.38%), proline (33.74%), enzymatic antioxidants (i.e., CAT activity by 14.45%, GR activity by 67.5%, SOD activity by 35.37% and APX activity by 39.25%) and non-enzymatic antioxidants (i.e., GSH content by 117.5%, AsA content by 52.32%), yield and its components (i.e., number of spikelets spike-1 29.55%, 1000-grain weight 48.73% and grain yield ha-1 26.44%). The anatomical traits of stem and leaves were improved in wheat plants treated with Se30 +Si30. These changes resulting from the exogenous applications of Se, Si or their combinations, in turn, make these elements prospective in helping wheat plants to acclimate successfully to saline soil.
Authors: Ibrahim Al-Ashkar; Ali Alderfasi; Walid Ben Romdhane; Mahmoud F Seleiman; Rania A El-Said; Abdullah Al-Doss Journal: Plants (Basel) Date: 2020-02-25
Authors: Mahmoud F Seleiman; Wael M Semida; Mostafa M Rady; Gamal F Mohamed; Khaulood A Hemida; Bushra Ahmed Alhammad; Mohamed M Hassan; Ashwag Shami Journal: Plants (Basel) Date: 2020-12-16