Shandong Key Laboratory of Eco-Environmental Science for Yellow River Delta, Binzhou University, Binzhou, P.R. China.
PLoS One. 2019 Jul 30;14(7):e0220340. doi: 10.1371/journal.pone.0220340. eCollection 2019.
Soil salinization is a serious problem that affects the seedling growth in many regions. A greenhouse experiment was carried to investigate the adaptation ability of seedlings (Sorghum bicolor (L.) Moench.) in coastal saline alkaline environment. Seedlings of sorghum were treated by different salt and alkali stress (NaCl: Na2SO4: NaHCO3 were 2:1:0, 2:1:1, 2:1:2). The treatments consisted of three levels of salinity (100, 200 and 300 mmol/L) and pH values were 7.08, 8.78 and 9.04. The results showed that the seedlings of sorghum have good adaptability to salt stress under low pH (pH ≤7.08). The plant height, the maximum leave areas of seedlings all dropped and root length first ascended and then descended with the increasing of salt and alkali stress. The contents of Chlorophyll b degraded significantly under salt and alkali stress. Salt and alkali stress stimulated the accumulation of organic solutes (proline and protein) and inorganic ions (Na+, Cl-, SO42-). Our results showed that salt and alkali stress have significant effect on growth indexes except root length and the interaction effect has significantly on physiology.
土壤盐渍化是影响许多地区幼苗生长的一个严重问题。本温室实验旨在研究滨海盐碱性环境下幼苗（高粱）的适应能力。高粱幼苗受到不同盐碱性胁迫（NaCl: Na2SO4: NaHCO3 为 2:1:0、2:1:1、2:1:2）的处理。处理包括三个盐度水平（100、200 和 300 mmol/L）和 pH 值分别为 7.08、8.78 和 9.04。结果表明，在低 pH（pH≤7.08）条件下，高粱幼苗对盐胁迫具有良好的适应性。植株高度和最大叶片面积随着盐碱性胁迫的增加而下降，根长先上升后下降。叶绿素 b 在盐碱性胁迫下明显降解。盐碱性胁迫刺激了有机溶质（脯氨酸和蛋白质）和无机离子（Na+、Cl-、SO42-）的积累。我们的结果表明，盐碱性胁迫对生长指标有显著影响，除根长外，互作效应对生理指标也有显著影响。
