| 高丹草种子萌发和幼苗生长对模拟盐碱互作胁迫的响应 |
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| 引用本文： | 田,祺,张会慧,孙广玉.高丹草种子萌发和幼苗生长对模拟盐碱互作胁迫的响应[J].安徽农业科学,2014(6):1707-1710,1736. |
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| 作者姓名： | 田 祺 张会慧 孙广玉 |
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| 作者单位： | 东北林业大学生命科学学院,黑龙江哈尔滨150040 |
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| 基金项目： | 国家科技支撑项目（2011BAD08B02-3）;国家自然科学基金（31070307,30771746）. |
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| 摘 要： | 为限制盐碱地高丹草种子萌发和幼苗生长的主导影响因素,将2种中性盐(NaCl、Na2SO4)和2种碱性盐(NaHCO3、Na2CO3)按照不同比例混合,模拟出16种盐碱互作条件,研究盐碱互作胁迫对高丹草种子萌发和幼苗生长的影响。结果表明,高丹草种子萌发及幼苗生长参数与总盐浓度、pH以及CO2-3和HCO-3浓度的影响较大,而CO2-3和HCO-3浓度又是影响pH的主要因素,总盐浓度和pH可作为影响高丹草种子萌发及幼苗生长的主导因素。但是,反映种子萌发参数的发芽率(Gr)、发芽势(Gp)、发芽指数(Gi)等指标以及反映幼苗生长参数的芽长(GL)、根长(RL)和侧根数(LRN)等指标对盐浓度和pH胁迫的敏感性不同,在相同等盐浓度下,随着pH的增加,GL、RL和LRN降低幅度较Gr、Gp、Gi等参数的降低幅度更为明显,盐害系数之间也存在明显的差异,说明盐浓度对高丹草种子萌发的影响较大,而高pH胁迫则主要影响其幼苗生长。因此,盐碱地高丹草的种植过程中不仅要考虑土壤含盐量的因素,而且要考虑pH的影响。
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| 关 键 词： | 高丹草 盐碱互作 萌发 幼苗生长 |
Effects of Simulated Salt and Alkali Interaction Stress on the Germination and Seedlings Growth at Germination Stage of Sorghum bicolor × S.sudanense Seeds |
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| TIAN Qi,ZHANG Hui-hui,SUN Guang-yu.Effects of Simulated Salt and Alkali Interaction Stress on the Germination and Seedlings Growth at Germination Stage of Sorghum bicolor × S.sudanense Seeds[J].Journal of Anhui Agricultural Sciences,2014(6):1707-1710,1736. |
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| Authors: | TIAN Qi ZHANG Hui-hui SUN Guang-yu |
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| Institution: | 1.College of Life Science, Northeast Forest University, Harbin, Heilongjiang 150040;) |
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| Abstract: | To determine the dominant factors limiting the germination and seedlings growth at germination stage of Sorghum bicolor × S.sudanense seeds in saline-alkali soil,two kinds of neutral salts （NaC1,Na2SO4） and two kinds of alkaline salts （NaHCO3,Na2CO3） were mixed in different proportions,the authors simulated 16 salt and alkali interaction stresses,and studied the effect of salt and alkali interaction stress on the germination and seedlings growth at germination stage of Sorghum bicolor × S.sudanense seeds.The results showed that total salt concentration,pH and the concentration of CO32-and HCO3-had great influence on the germination and seedlings growth at germination stage of Sorghum bicolor × S.sudanense seeds,and the concentration of CO23-and HCO3-were the main factors influencing the pH value,so the total salt concentration and pH value could be assumed to be the dominant factors limiting the germination and seedlings growth at germination stage of Sorghum bicolor × S.sudanense seeds.However,germination parameters （G,）,germination potential （GP）,germination index （Gi） and other indicators which reflect the germination rate of seeds and germinal length （GL）,root length （PL）,lateral root number （LRN）and other indicators which reflect seedlings growth parameters had different sensitivity to salt concentration and pH stress.Under the same salt concentration,the reduction of GL,RL and LRN was more obvious than that of Gr,GP and Gi with the increase of pH value,there is also significant difference between the salt damage coefficient,it showed that salt concentration had great influence on the germination of Sorghum bicolor × S.sudanense seeds,and the high pH stress mainly affected the seedlings growth.Therefore,the process of Sorghum bicolor × S.sudanense planting in saline-alkali soil should consider both the factor of soil salinity and the pH value. |
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| Keywords: | Sorghum bicolor × S sudanense Salt and alkali interaction Germination Seedlings growth |
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