Birhanie Ziggiju Mesenbet, Yang Dawei, Luan Mingbao, Xiao Aiping, Liu Liangliang, Zhang Chao, Biswas Ashok, Dey Susmita, Deng Yong, Li Defang
Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China.
Department of Plant Science, College of Agriculture and Natural Resources, Debre Markos University, Debre Markos 251269, Ethiopia.
Antioxidants (Basel). 2022 Oct 10;11(10):2005. doi: 10.3390/antiox11102005.
Salinity stress is a major environmental threat in agricultural systems. Kenaf is a promising crop for the future for cultivation in salinity-affected soils because of its high phytoremediation potential. The current study aimed to investigate the effects of salt stress using six different sodium chloride (NaCl) concentrations (0, 50, 100, 150, 200, and 250 mM) on the plant growth, physiological characteristics, bioactive constituents, and antioxidant capacity of . The results indicated that the NaCl stress induced significant reductions in plant height and in the dry and fresh weights of the leaf tissue. In addition, the K, Ca, Mg, and P concentrations in this tissue also decreased under NaCl stress treatment conditions. In contrast, the NaCl stress led to the accumulation of hydrogen peroxide (HO), superoxide anion (O), malondialdehyde (MDA), proline, total soluble sugar, and total soluble protein. Under NaCl stress, the levels of antioxidants, including phenolics and flavonoids, also increased. The gas chromatography-mass spectrometry (GC-MS) results showed that the volatile compounds, including heptacosane, 1-octadecanesulphonyl chloride, and tetratetracontane, were induced under the NaCl stress treatment. Furthermore, the salt stress significantly improved the antioxidant capacity of the leaf extracts. These findings may provide insight into how plants respond to salt stress and may help improve its medicinal value under salt stress.
盐分胁迫是农业系统中的主要环境威胁。红麻因其具有较高的植物修复潜力，是未来在受盐分影响土壤中种植的一种有前景的作物。当前研究旨在调查六种不同氯化钠（NaCl）浓度（0、50、100、150、200和250 mM）的盐胁迫对红麻植物生长、生理特性、生物活性成分和抗氧化能力的影响。结果表明，NaCl胁迫导致株高以及叶片组织干重和鲜重显著降低。此外，在NaCl胁迫处理条件下，该组织中的钾、钙、镁和磷浓度也降低。相反，NaCl胁迫导致过氧化氢（HO）、超氧阴离子（O）、丙二醛（MDA）、脯氨酸、总可溶性糖和总可溶性蛋白积累。在NaCl胁迫下，包括酚类和黄酮类在内的抗氧化剂水平也增加。气相色谱 - 质谱（GC - MS）结果表明，在NaCl胁迫处理下，包括二十七烷、1 - 十八烷磺酰氯和四十四烷在内的挥发性化合物被诱导产生。此外，盐胁迫显著提高了叶片提取物的抗氧化能力。这些发现可能为红麻植物如何应对盐胁迫提供见解，并可能有助于提高其在盐胁迫下的药用价值。
