| 酸、铝胁迫对苜蓿种子发芽和幼苗生长的影响 |
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| 引用本文： | 杨丹娜,骆夜烽,谢家琪,张钦,杨烈.酸、铝胁迫对苜蓿种子发芽和幼苗生长的影响[J].草业学报,2015,24(8):103-109. |
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| 作者姓名： | 杨丹娜 骆夜烽 谢家琪 张钦 杨烈 |
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| 作者单位： | 1.安徽农业大学农学院,安徽 合肥 230036; 2.安徽农业大学林学与园林学院,安徽 合肥 230036 |
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| 基金项目： | 国家自然科学基金，安徽省高等教育省级振兴计划项目“作物学科高水平教师团队建设”，安徽省省级学科建设重大项目-草学，安徽农业大学2014年度“学科骨干培育计划”资助。 |
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| 摘 要： | 本试验采用水培法,以金皇后品种的紫花苜蓿为材料,探讨了酸(pH 3.0,4.5,6.0,7.5)、Al3+(0,50,100,200 mg/L)胁迫处理对苜蓿种子发芽和幼苗生长的影响。结果表明,随着酸度的增加对苜蓿种子发芽和幼苗生长的抑制作用增强,微酸(pH 6.0)环境下几乎没有抑制作用,甚至有促进作用。溶液铝含量在0,50 mg/L时,苜蓿生长正常,发芽率、发芽势、发芽指数、茎长、根长等均明显高于其他处理(P<0.05);当铝含量在100~200 mg/L时,苜蓿种子发芽和幼苗生长受到严重抑制,发芽率、发芽势、发芽指数、茎长、根长等均显著低于(P<0.05)其他处理。酸、铝共同胁迫对苜蓿种子发芽和幼苗生长的影响大于单一胁迫对它的影响,当pH<4.5、Al3+浓度达到50 mg/L以上时,即可对苜蓿芽苗的生长产生明显的抑制作用。
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| 关 键 词： | 苜蓿 酸胁迫 铝胁迫 种子发芽 幼苗生长 |
Effects of acidity and/or aluminum stress on seed germination and seedling growth of alfalfa |
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| YANG Dan-Na,LUO Ye-Feng,XIE Jia-Qi,ZHANG Qin,YANG Lie.Effects of acidity and/or aluminum stress on seed germination and seedling growth of alfalfa[J].Acta Prataculturae Sinica,2015,24(8):103-109. |
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| Authors: | YANG Dan-Na LUO Ye-Feng XIE Jia-Qi ZHANG Qin YANG Lie |
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| Institution: | 1.Agronomy College, Anhui Agricultural University, Hefei 230036, China; 2.School of Forestry Landscape Architecture, Anhui Agricultural University, Hefei 230036, China |
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| Abstract: | Alfalfa seeds (cv.Golden empress)were treated with acidic (pH 3.0,4.5,6.0,7.5)and aluminum (0,50,100,200 mg/L Al3 + )solutions to study the effects of pH and Al3 + stresses on seed germination and seedling growth.The results showed that acidity significantly inhibited germination and seedling growth of al-falfa;lower pH had a greater effect than higher pH.Germination rate,germination potential,germination in-dex,stem length and root length of untreated seeds (control)and seeds treated with 50 mg/L Al3 + were signif-icantly higher (P <0.05)than all other treatments.Germination and seedling growth were seriously reduced by higher Al3 + treatments (100 mg/L or 200 mg/L)which resulted in a significant decrease in the growth index (P <0.05).The combination of acidity and aluminum stress on germination and seedling growth of alfalfa were greater than those of either stress in isolation.Even the treatment of pH<4.5 and Al3 + >50 mg/L had a sig-nificant negative effect on seed germination and growth. |
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| Keywords: | alfalfa acid stress aluminum stress germination seedling growth |
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