Bello Adewale Suraj, Ben-Hamadou Radhouane, Hamdi Helmi, Saadaoui Imen, Ahmed Talaat
Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, Doha P.O. Box 2713, Qatar.
Center for Sustainable Development, Qatar University, Doha P.O. Box 2713, Qatar.
Plants (Basel). 2021 Dec 30;11(1):104. doi: 10.3390/plants11010104.
Salinity is one of the abiotic stresses that affect crop growth and productivity in arid and semi-arid regions. Unfortunately, there are few known methods to mitigate the deleterious impacts of salt stress on the development and yield of vegetable crops. Blue-green algae (cyanobacteria) are endowed with the potential to curb the negative impacts of salt stress as they are characterized by biostimulant properties. The present work aimed to investigate the effects of sp. as a foliar extract on the growth characteristics, physiological and biochemical responses of bell pepper ( L.) plants under varying levels of salinity conditions. A soilless water experiment was carried out in a greenhouse where bell pepper seedlings were grown under five salt concentrations (0, 50, 200, 150, and 200 mM of NaCl). Growth characteristics, pigments content, relative water content, and antioxidant activity (CAT) were determined. Our results showed that growth parameters, relative water content (RWC), chlorophyll a & b concentrations under salinity conditions were negatively affected at the highest concentration (200 mM). Interestingly, the application of sp. foliar extract enhanced the plant growth characteristics as shoot length increased by 17.014%, fresh weight by 39.15%, dry and weight by 31.02%, at various salt treatments. Moreover, chlorophyll a and b increased significantly compared with seedlings sprayed with water. Similarly, RWC exhibited a significant increase (92.05%) compared with plants sprayed with water. In addition, antioxidants activities and accumulation of proline were improved in sp. extract foliar sprayed seedlings compared to the plants foliar sprayed with water. Conclusively, at the expiration of our study, the sp. extract-treated plants were found to be more efficient in mitigating the deleterious effects caused by the salinity conditions which is an indication of an enhancement potential of tolerating salt-stressed plants when compared to the control group.
盐度是影响干旱和半干旱地区作物生长和生产力的非生物胁迫之一。不幸的是，目前已知的减轻盐胁迫对蔬菜作物发育和产量有害影响的方法很少。蓝藻（蓝细菌）具有抑制盐胁迫负面影响的潜力，因为它们具有生物刺激特性。本研究旨在探讨[具体蓝藻种类]作为叶面提取物对不同盐度条件下甜椒（[甜椒学名]）植株生长特性、生理和生化反应的影响。在温室中进行了无土水培实验，将甜椒幼苗种植在五种盐浓度（0、50、100、150和200 mM的NaCl）下。测定了生长特性、色素含量、相对含水量和抗氧化活性（CAT）。我们的结果表明，在最高浓度（200 mM）下，盐度条件下的生长参数、相对含水量（RWC）、叶绿素a和b浓度受到负面影响。有趣的是，在各种盐处理下，喷施[具体蓝藻种类]叶面提取物提高了植株生长特性，茎长增加了17.014%，鲜重增加了39.15%，干重增加了31.02%。此外，与喷水处理的幼苗相比，叶绿素a和b显著增加。同样，与喷水处理的植株相比，RWC显著增加（92.05%）。此外，与喷水处理的植株相比，喷施[具体蓝藻种类]提取物的幼苗抗氧化活性和脯氨酸积累有所提高。总之，在我们的研究结束时，发现喷施[具体蓝藻种类]提取物的植株在减轻盐度条件造成的有害影响方面更有效，这表明与对照组相比，其具有增强耐盐胁迫植物的潜力。
