探讨IAA和褪黑素(MT)对三种植物缓解盐害对植物的协同作用,我们的目标是确定改善每个物种的盐度抗性的外源激素处理的最佳浓度。在这个实验中,三种沙漠植物,黄花梭菌,唐古托白刺,和蒙古羊水,这在乌海市很常见,用作植物材料。两个时间段(12小时,24h)的外源激素IAA(100μmol/L)和外源褪黑素浓度(0、100、200、300μmol/L)在不同的外源IAA和外源褪黑素条件下处理3种荒漠植物盐渍土。结果表明,在不同浓度的外源IAA和褪黑素下,三种荒漠植物在盐碱化土壤中的发芽率和活力均得到改善。然而,随着褪黑素浓度的增加,这些荒漠植物的发芽率和活力受到抑制。然而,植物高度,根长,叶长,鲜重,干重,在外源IAA和外源褪黑素的不同条件下,三种荒漠植物的根系活力得到了缓解。在两种外源激素的作用下,低浓度褪黑素降低了丙二醛含量,增加了脯氨酸含量。随着褪黑激素水平的增加,抗氧化酶的活性也最初上升,随后下降。这项研究强调了两种外源激素对三种荒漠植物中细胞渗透压调节剂和抗氧化酶活性的关键作用的协同作用。
To investigate the synergistic effect of
IAA and melatonin (MT) on three plants to alleviate the effects of salt damage on plants, we aim to determine the optimal concentrations of exogenous hormone treatments that improve salinity resistance for each species. In this experiment, three desert plants, Sarcozygium xanthoxylon, Nitraria tangutorum, and Ammopiptanthus mongolicus, which are common in Wuhai City, were used as plant materials. Two time periods (12 h,24 h) of exogenous hormone
IAA (100 μmol/L) and exogenous melatonin concentration (0, 100, 200, 300 μmol/L) were used to treat the three desert plants in saline soil under different conditions of exogenous
IAA and exogenous melatonin. The results indicate that under different concentrations of exogenous
IAA and melatonin, the germination rate and vigor of the three desert plant species in saline-alkaline soil improved. However, as the concentration of melatonin increased, the germination rate and vigor of these desert plants were inhibited. Whereas, plant height, root length, leaf length, fresh weight, dry weight, and root vigor of the three desert plants were alleviated under different conditions of exogenous
IAA and exogenous melatonin. under the action of two exogenous hormones, the low concentration of melatonin decreased their malondialdehyde content and increased their proline content. As melatonin levels increased, the activity of antioxidant enzymes also rose initially, followed by a subsequent decline. This study highlights the synergistic effects of two exogenous hormones on the critical role of cell osmomodulators and antioxidant enzyme activity in combating salinity damage in three desert plants.