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铝胁迫对入侵植物北美车前生长特性和生物量分配的影响

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2011年04期
页码:
507
栏目:
植物生态学与环境生物学
出版日期:
2011-07-25

文章信息/Info

Title:
Effects of aluminum stress on growth characteristics and biomass allocation of Plantago virginica
作者:
陈香1 陆耀东1* 黄伟2 胡雪华2
1.佛山市林业科学研究所, 广东 佛山 528222; 2.井冈山大学 生命科学学院, 江西 吉安 343009
Author(s):
CHEN Xiang1 LU YaoDong1* HUANG Wei2 HU XueHua2
1.Forestry Institute of Foshan, Fuoshan 528222, China; 2.School of Life Sciences, Jinggangshan University, Ji’an 343009, China
关键词:
铝胁迫 生长特性 生物量分配 北美车前
Keywords:
aluminum stress growth characteristics biomass allocation Plantago virginica
分类号:
S685.14
DOI:
-
文献标识码:
A
摘要:
探讨了铝胁迫对入侵植物北美车前生长特性和生物量分配的影响。结果表明:低浓度( 100 mg/L)的铝胁迫处理对北美车前的生长无显著影响,高浓度(2 000 mg/L)使植株叶片数减少、叶面积变小;短时间高浓度铝胁迫促进北美车前的抽穗数,长时间(30 d)铝胁迫处理后穗生长受到抑制,这种抑制作用在高浓度铝胁迫处理下表现尤其明显。随着铝胁迫程度的加剧,生物量分配存在由地下部转移至地上部的趋势。北美车前在高浓度铝胁迫下形成一种“集中抽穗”模式,这可能是其在生存过程中对不利环境的一种适应行为。
Abstract:
The objective of the present investigation is to observe the effects of different Al3+ concentration (100,500,800,2 000 mg/L) along with different duration times (10,20,30 d) on growth characteristics and biomass allocation of the invasive plant P.virginica. The results showed that 100 mg/L of Al3+ had little effect on the growth of P.virginica. Under 2 000 mg/L of Al3+,both leaf areas and leaf numbers of P.virginica decreased. Spike number of P.virginica was promoted under 2 000 mg/L Al3+ stress for a short treatment time,but its growth velocity was inhibited over a long period 2 000 mg/L. With aggravating Al3+ stress,a trend was found that its biomass allocation prefered aboveground to underground. The proportion of its spikes increased rapidly to a peak and then declined rapidly over the subsequent days under high concentration of Al3+,revealing an adaptive strategy for its reproducing during unfavorable circumstances.

参考文献/References

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2011-07-25