| 空心莲子草浸提液对苏丹草根缘细胞的化感作用 |
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| 引用本文： | 王桂芹,王玉良.空心莲子草浸提液对苏丹草根缘细胞的化感作用[J].热带作物学报,2012,33(11):2085-2090. |
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| 作者姓名： | 王桂芹 王玉良 |
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| 作者单位： | 安徽科技学院生命科学学院,安徽凤阳,233100 |
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| 基金项目： | 安徽省教育厅自然科学基金资助项目（No. 200KJ165B，KJ2008B07ZC）和安徽科技学院专项基金资助项目（No. ZRC200436）。 |
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| 摘 要： | 采用悬空气培养法研究了入侵植物空心莲子草(Alternanthera phiLoxeroides Griseb)不同器官水浸提液对苏丹草根尖生长、根缘细胞活性和根冠果胶甲基酯酶(PME)的化感效应。结果表明:空心莲子草水溶性化感物质对苏丹草根尖的发育有明显的抑制及伤害作用,且随着处理浓度增加抑制作用显著增强;苏丹草根缘细胞存活率随着水浸提液浓度的升高而下降;苏丹草根冠果胶甲基酯酶(PME)活性与水浸提液处理浓度具有密切相关性,呈先上升后下降趋势(茎例外),经茎的水浸提液处理的苏丹草根冠PME活性则表现出与空心莲子草根、根状茎和叶相反的趋势;空心莲子草不同器官化感作用差异显著,其综合化感效应表现为:叶>根和根状茎>茎。化感作用是空心莲子草实现干扰性竞争的基础,也是排挤和绞杀土著物种迅速占领生态位的主要原因之一。
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| 关 键 词： | 空心莲子草 水浸提液 化感作用 根缘细胞 PME |
The allelopathic Effects of the Aqueous Extracts from Alternanthera philoxeroides.on the Root Border Cells of Sorghumsu danense (Piper) Stapf. |
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| WANG Guiqin and WANG Yuliang.The allelopathic Effects of the Aqueous Extracts from Alternanthera philoxeroides.on the Root Border Cells of Sorghumsu danense (Piper) Stapf.[J].Chinese Journal of Tropical Crops,2012,33(11):2085-2090. |
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| Authors: | WANG Guiqin and WANG Yuliang |
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| Institution: | Life science,Anhui Science and Technology University,Fengyang,Anhui 233100,China |
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| Abstract: | The air culture method was introduced here to investigate the allelopathic effect of the aqueous extracts from different organs of Alternanthera philoxeroides Griseb, the invasive plant, on the growth of the root, the activity of the root border cells and root cap pectin methyl esterase(PME)of Sorghumsu danense(Piper)Stapf. The results showed that the water-soluble components extracted from Alternanthera philoxeroides had an obvious inhibition and damage effect on the development of root tip of Sorghumsu danense(Piper)Stapf, and the inhibition effect significantly enhanced with the components concentration increased. The survival rate of the root border cells of the Sorghumsu danense(Piper)Stapf decreased with the aqueous extract concentration increased; the activity of PME had a close relationship with the aqueous extract concentration. With the exception of treated with stems extraction, the activity of PME showed a tendency of first increased and then downward, while the opposite trend was showed when treated with stem extraction. The allelopathic effects of aqueous extracts from different organs of Alternanthera philoxeroides Griseb differed significantly, and the allelopathic effects were: leaf>root and rhizome>stem. The allelopathic effect was the basic mechanism of Alternanthera philoxeroides to perform interference competition, and one of the main reasons to exclude and strangle native species in order to occupy ecological niche quickly. |
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| Keywords: | Alternanthera phiLoxeroides Griseb Aqueous extracts Allelopathic effects Root border cells PEM |
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