Cellular evidence of allelopathic interference of benzoic acid to mustard (Brassica juncea L.) seedling growth

被引:56
作者
Kaur, H
Inderjit [1 ]
Kaushik, S
机构
[1] Univ Delhi, Dept Bot, Delhi 110007, India
[2] Panjab Univ, Dept Bot, Chandigarh 160014, India
关键词
allelopathy; benzoic acid; mustard; root growth inhibition; transmission electron microscopy;
D O I
10.1016/j.plaphy.2004.12.007
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Cellular changes in the roots of mustard (Brassica juncea L.) grown in soil treated with 1.09, 1.46 and 1.83 mg benzoic acid per g soil, a known allelochemical, were analyzed after 7 days. The recoverable concentration of 1.09, 1.46 and 1.8 mg benzoic acid per g soil (measured by high performance liquid chromatography) was 68, 150 and 250 mu g benzoic acid per g soil, respectively. The benzoic acid treatments suppressed root growth by 30.5%, 58.8% and 81.1% with increasing concentrations. Transmission electron microscopy studies of roots showed irregular shaped cells arranged in a disorganized manner and disruption of cell organelles at cellular level. Root cells showed dissolution of middle lamella (at 68 and 150 mu g benzoic acid per g soil) but intact middle lamella with increased wall deposits was observed with 250 mu g benzoic acid per g soil. Damage to the mustard root at cellular level was evidenced by the changes in cell morphology and internal organization. (c) 2005 Elsevier SAS. All rights reserved.
引用
收藏
页码:77 / 81
页数:5
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