摘要
试验研究了不同浓度烤烟根系分泌物对烤烟幼苗生长、干物质积累、叶绿素含量、根系活力和烟苗叶片酶活的影响。结果表明,随着根系分泌物浓度的增加,幼苗的株高、最大叶长、最大叶宽、根系总表面积、分枝数、根系平均直径、根尖数、叶绿素a含量、叶绿素b含量、类胡萝卜素含量以及根系活力总体表现出先促进后抑制的趋势;MDA浓度在不同浓度烤烟根系分泌物处理下表现出一直促进的趋势;根冠比、超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性在不同浓度烤烟根系分泌物处理下表现出一直抑制的趋势,且浓度越大抑制趋势越明显。
The effects of different concentration flue-cured tobacco root exudates on the growth of flue-cured tobacco seedlings,dry matter accumulation,chlorophyll content,root activities and enzyme activities of tobacco were studied.Results showed that with the increase of root exudates concentration,seedling height,the maximum leaf length,the maximum leaf width,the total root surface area,the number of branches,the root average diameter,the number of root tip,the content of chlorophyll A and chlorophyll B,the content of carotenoids and root activity were first stimulated and then inhibited on the whole.The fresh-dry ratio,MDA content performed with the trend of increase.The root-top ratio,activity of SOD and POD performed with the trend of inhibition.The inhibition of higher concentration of flue-cured tobacco root exudates was more obvious.
出处
《湖北农业科学》
北大核心
2013年第19期4698-4702,共5页
Hubei Agricultural Sciences
基金
贵州省烟草专卖局科技项目[黔烟科(2011)02号]
中国烟草总公司贵州省烟草公司项目(201232)
中国烟草总公司项目(11020100219)
关键词
烤烟
根系分泌物
农艺性状
酶活性
叶绿素
tobacco
root exudates
agronomic trait
enzyme activity
chlorophyll
