| 黄花棘豆水提液对燕麦的化感作用及其机理研究 |
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| 引用本文： | 李翔,杨顺义,沈慧敏,郭金梅.黄花棘豆水提液对燕麦的化感作用及其机理研究[J].西北植物学报,2011,31(7):1367-1375. |
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| 作者姓名： | 李翔 杨顺义 沈慧敏 郭金梅 |
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| 作者单位： | 甘肃农业大学,草业学院,兰州,730070 |
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| 基金项目： | 教育部省部共建重点实验室资助项目(CY-GG-2006-05) |
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| 摘 要： | 以燕麦种子和幼苗为受体,采用室内培养皿法、室内盆栽法和生化分析法,研究了甘肃天祝草地有毒植物黄花棘豆水浸提液对燕麦种子、幼苗的化感作用及其作用机理.结果表明:(1)黄花棘豆水提液均可抑制燕麦种子萌发和幼苗生长,且化感抑制作用随着水提液浓度的增大显著增强;燕麦幼苗根在高浓度的黄花棘豆水提液作用下表现出畸形.(2)随着水提液浓度的增大,根尖有丝分裂逐渐减弱及分裂高峰时间逐渐推迟,种子淀粉酶活性也逐渐下降.(3)燕麦幼苗茎叶部和根部的可溶性糖、可溶性蛋白和叶绿素的含量随着水提液浓度的增大以及作用时间的延长逐渐降低,丙二醛含量则逐渐升高.(4)随着黄花棘豆水提液浓度的增大,其对燕麦幼苗过氧化物酶(POD)、过氧化氢酶(CAT)和超氧化物歧化酶(SOD)活性的抑制作用逐渐增强,随着作用时间的延长抑制作用逐渐减弱.研究发现,黄花棘豆水提液通过降低燕麦幼苗渗透调节物质含量,抑制保护性酶活性,增加膜脂过氧化伤害,导致根尖细胞分裂缓慢,抑制燕麦种子萌发和幼苗生长,从而表现出化感作用,且化感作用随着浓度的增加而增强.
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| 关 键 词： | 黄花棘豆 水浸提液 燕麦 化感作用 |
Allelopathy and Its Mechanism of Extract Solution ofOxytropis ochrocephala on Avena sativa |
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| LI Xiang,YANG Shun-yi,SHEN Hui-min,GUO Jin-mei.Allelopathy and Its Mechanism of Extract Solution ofOxytropis ochrocephala on Avena sativa[J].Acta Botanica Boreali-Occidentalia Sinica,2011,31(7):1367-1375. |
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| Authors: | LI Xiang YANG Shun-yi SHEN Hui-min GUO Jin-mei |
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| Institution: | LI Xiang,YANG Shun-yi,SHEN Hui-min,GUO Jin-mei(College of Prataculture,Gansu Agricultural University,Lanzhou 730070,China) |
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| Abstract: | By means of indoor Petri dish bioassay and pot-culture method and biochemical analysis,we studied the allelopathy and its mechanism of extract solution of poisonous plant Oxytropis ochrocephala collected from natural grassland in Gansu on Avena sativa.The results showed that the water extract of O.ochrocephala remarkably inhibited the seed germination and the growth of A.sativa seedlings,and the inhibition increased with increasing concentration of the extract;100 g/L water extract of O.ochrocephala lead th... |
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| Keywords: | Oxytropis ochrocephala water extract solution Avena sativa allelopathy |
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