Bellache Manel, Torres-Pagan Natalia, Verdeguer Mercedes, Llinares Josep V, Benfekih Leila Allal, Sestras Radu E, Vicente Oscar, Sestras Adriana F, Boscaiu Monica
Mediterranean Agroforestry Institute, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain.
Laboratory for Research on Medicinal and Aromatic Plants, Faculty of Nature and Life Sciences, Department of Biotechnology, Université Saad Dahlab de Blida 1, Blida 09000, Algeria.
Plants (Basel). 2022 Aug 6;11(15):2059. doi: 10.3390/plants11152059.
and are two noxious weeds present in many parts of the world. Their tolerance to salinity and water deficit was analysed at the seed germination stage and during vegetative development. Seed germination was tested in solutions with different concentrations of NaCl and polyethylene glycol (PEG). Growth parameters, photosynthetic pigments, ion accumulation, and antioxidant mechanisms were analysed in plants that were subjected to increasing NaCl solutions, or severe water deficit by completely restricting irrigation. Seed germination was mostly affected by NaCl, but less by PEG in both species. had a faster germination in all treatments and maintained a higher percentage of germination under the highest concentration of salt applied. Growth responses were similar in the two species, both being more affected by higher salt concentrations than by water deficit. The main differences in the responses of the two species to stress regard K and proline concentration. K in roots decreased under salt stress in , but remained constant in leaves, whereas in increased in roots and leaves in salt-stressed plants. Proline concentration increased in all plants under salt stress, but only in those under the highest salt concentration in . The results obtained indicate that the two species are relatively tolerant to water deficit and medium salinity but are susceptible to high NaCl concentrations.
[植物名称1]和[植物名称2]是世界许多地区存在的两种有害杂草。在种子萌发阶段和营养生长期间分析了它们对盐分和水分亏缺的耐受性。在含有不同浓度氯化钠（NaCl）和聚乙二醇（PEG）的溶液中测试种子萌发情况。对用逐渐增加的NaCl溶液处理或通过完全限制灌溉造成严重水分亏缺的植株，分析其生长参数、光合色素、离子积累和抗氧化机制。两种植物的种子萌发大多受NaCl影响，但受PEG的影响较小。在所有处理中，[植物名称1]的萌发速度更快，并且在施加的最高盐浓度下保持较高的萌发率。两种植物的生长反应相似，相比水分亏缺，它们受较高盐浓度的影响更大。两种植物对胁迫反应的主要差异在于钾（K）和脯氨酸浓度。在盐胁迫下，[植物名称1]根中的K含量下降，但叶片中保持不变，而在[植物名称2]中，盐胁迫植株的根和叶中的K含量增加。在盐胁迫下，所有[植物名称1]植株中的脯氨酸浓度都增加，但在[植物名称2]中只有在最高盐浓度下的植株中脯氨酸浓度才增加。所得结果表明，这两种植物对水分亏缺和中等盐分相对耐受，但对高浓度NaCl敏感。
