| 文 珂，刘文胜.锰胁迫对青葙种子萌发和幼苗生理的影响[J].广东农业科学,2017,44(6):78-83 |
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锰胁迫对青葙种子萌发和幼苗生理的影响 |
| Effects of Mn stress on seed germination and seedling physiological characteristics of Celosia argentea L. |
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| DOI：10.16768/j.issn.1004-874X.2017.06.011 |
| 中文关键词: 锰胁迫 青葙 种子萌发 幼苗生长 可溶性糖 |
| 英文关键词: manganese stress Celosia argentea seed germination seedling growth soluble sugar content |
| 基金项目:湖南省教育厅重点项目（14A156）；湖南省自然科学基金（2016JJ4120） |
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| 摘要点击次数: 1828 |
| 全文下载次数: 733 |
| 中文摘要: |
| 利用植物进行锰（Mn）污染治理之前，首先要探明胁迫对种子萌发及幼苗生长的影响。以
锰超富集植物青葙（Celosia argentea）为试验材料，在不同锰浓度（0.005、1.000、5.000、8.000、12.000、
15.000 mmol/L）下开展种子萌发试验，研究锰浓度与该植物种子萌发及幼苗生长的关系。结果表明，随着
锰浓度的升高，青葙种子发芽率、发芽势、发芽指数及活力指数均呈现出先升高后降低的趋势，青葙幼苗
的根长（r =-0.954，P =0.003）、芽长（r =-0.957，P =0.003）降低，幼苗总生物量（r =-0.941，P =0.005）
也随之下降；幼苗总淀粉酶活性随着锰浓度的升高而呈下降趋势（r =-0.643，P =0.169），可溶性糖含量则
呈先增加后下降的趋势。不同锰浓度下青葙总淀粉酶活性及可溶性糖含量的变化可能是导致该植物种子
萌发及幼苗生长发生改变的主要原因。 |
| 英文摘要: |
| Revealing the effects of heavy-metal stress on seed germination and seedling growth is the first
step for effective controlling manganese（Mn） population by using these plants. In the present paper，we studied
the relationship between Mn concentration and seed germination / and seedling growth of Celosia argentea
by conducting seed germination experiments under different Mn concentrations（ 0.005，1.000，5.000，
8.000，12.000 and 15.000 mmol/L）. The results showed that seed germination rate，germination potential，
germination index and vitality index all increased first and then decreased with Mn concentration increasing.
The length of root（ r =-0.954，P =0.003） and shoot（ r =-0.957，P =0.003） of seedlings both decreased with
Mn concentration rising when the Mn concentration ascended to a certain level. And the total biomass of seedling
（r =-0.941，P =0.005） showed the same trend. Total amylase activity of seedlings（ r =-0.643，P =0.169）
decreased with the increase of Mn concentration. And the soluble sugar content increased firstly and then decreased
with Mn concentration rising. The results illustrated that the changes of amylase activity and soluble sugar content
of seedlings under different Mn concentrations might be the most important reasons that causing the changes of
seed germination and seedling growth. |
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