中间锦鸡儿不同器官水浸提液对苜蓿种子萌发的影响  被引量:2

Allelopathic Effects of Aqueous Extracts From Different Organs of Caragana intermedia on Seed Germination of Alfalfa

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作  者:翟德苹 陈林[1] 杨新国[1] 宋乃平[1] 蒋齐[2] 

机构地区:[1]宁夏大学西北退化生态系统恢复与重建教育部重点实验室,西北土地退化与生态恢复省部共建国家重点实验室培育基地,西部生态与生物资源开发联合研究中心,宁夏银川750021 [2]宁夏农林科学院荒漠化治理研究所,宁夏银川750002

出  处:《北方园艺》2014年第9期67-70,共4页Northern Horticulture

基  金:国家重点基础科学("973"计划)研究前期专项资助项目(2012CB723206);宁夏高等学校科学研究资助项目(NGY2013027)

摘  要:以苜蓿为试材,研究了中间锦鸡儿根、茎、叶不同浓度水浸提液(0.5、1.0、5.0、10.0、25.0mg/mL)对苜蓿种子萌发及幼苗生长的化感作用。结果表明:中间锦鸡儿不同器官水浸提液均对苜蓿种子萌发表现出低促高抑的效应。中间锦鸡儿根、茎水浸提液对苜蓿胚根的生长表现为促进作用,且随水浸提液浓度的增大呈先增强后减弱的趋势;中间锦鸡儿根、茎水浸提液对苜蓿胚轴主要表现为抑制作用;中间锦鸡儿叶水浸提液对苜蓿胚根和胚轴的生长均表现出低促高抑的效应;中间锦鸡儿根、叶水浸提液对苜蓿幼苗干重的影响表现为低促高抑,而中间锦鸡儿茎水浸提液则以促进作用为主。总体来看,中间锦鸡儿各器官的水浸提液对苜蓿种子的萌发存在化感作用,建议今后在营造锦鸡儿-苜蓿人工复合系统时需考虑种间化感作用。Taking alfalfa as material,the allelopathic effect of aqueous extracts over a range of concentrations 0. 5,1.0,5. 0, 10. 0,25. 0 mg/mL from root, stem and leaf of Caragana intermedia on the seed germination and seedling growth of alfalfa were studied. The results showed that, all of the aqueous extracts from different organs of Caragana intermedia had allelopathic effects on the seed germination, and the aqueous extracts improved seed germination at low concentration,whereas inhibited at high concentration. Aqueous extracts from root and stem of Caragana intermedia had promotion effect on the growth of radicle and the promotion effect increased first and then decreased with the enrichment of aqueous extracts. Aqueous extracts from root and stem of Caragana intermedia had inhibition effect on the growth of hypocotyl. Aqueous extracts from stem of Caragana intermedia had promotion effect on the growth of radicle and hypocotyl at low concentration, whereas inhibition effect at high concentration. Aqueous extracts from root and leaf of Caragana intermedia had inhibition effect on dry weight of alfalfa seedling at low concentration,inhibition effect at high concentration,while aqueous extracts from stem mainly had promotion effect on it. In general, aqueous extracts from different organs of Caragana intermedia had allelopathic effects on the seed germination of alfalfa, and recommended that interspecific allelopathy should be taken into account in creating caragana-alfalfa artificial compound system.

关 键 词:中间锦鸡儿 苜蓿 化感作用 种子萌发 

分 类 号:S793.3[农业科学—林木遗传育种]

 

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