植物生态学报 ›› 2007, Vol. 31 ›› Issue (4): 599-606.DOI: 10.17521/cjpe.2007.0076
蔡颖1,2, 关保华1,2, 安树青1,2,*(), 申瑞玲2, 蒋金辉2, 董蕾3
收稿日期:
2006-07-19
接受日期:
2007-01-05
出版日期:
2007-07-19
发布日期:
2007-07-30
通讯作者:
安树青
作者简介:
* E-mail: anshq@nju.edu.cn基金资助:
CAI Ying1,2, GUAN Bao-Hua1,2, AN Shu-Qing1,2,*(), SHEN Rui-Ling2, JIANG Jin-Hui2, DONG Lei3
Received:
2006-07-19
Accepted:
2007-01-05
Online:
2007-07-19
Published:
2007-07-30
Contact:
AN Shu-Qing
摘要:
植物,尤其是克隆植物,能够通过表型变化来缓解外界压力,提高对环境的适应能力。该文研究了水生克隆植物乌菱(Trapa bicornis)对底泥磷含量(Sediment phosphorus concentration, SP)、植株密度(Plant density, PD) 及两者间交互作用的可塑性响应,探讨可塑性是否能促进其在富营养化环境中的生长。结果显示,底泥磷含量对乌菱的主菱盘叶数、同化根比根长、吸收根比根长以及叶、茎、同化根、吸收根与植株总磷含量等都有显著影响 (p<0.05),而植株密度对乌菱各生长及生理生态参数均无显著作用 (p>0.05);SP与PD的交互作用弱化了底泥磷含量对乌菱的效应。底泥磷含量和植株密度甚至改变了同化根、吸收根、茎、叶与总生物量之间的异速生长关系。研究结果表明:乌菱的表型可塑性变化主要受底泥磷含量的影响,乌菱通过器官生物量分配、形态结构及生理生态特征的调整来响应底泥磷含量的变化;同时,高的植株密度也可以提高其在富营养化生境下的生态适应性。
蔡颖, 关保华, 安树青, 申瑞玲, 蒋金辉, 董蕾. 克隆植物乌菱对底泥磷含量及植株密度的表型可塑性响应. 植物生态学报, 2007, 31(4): 599-606. DOI: 10.17521/cjpe.2007.0076
CAI Ying, GUAN Bao-Hua, AN Shu-Qing, SHEN Rui-Ling, JIANG Jin-Hui, DONG Lei. PHENOTYPIC PLASTICITY OF THE CLONAL PLANT TRAPA BICORNIS IN RESPONSE TO SEDIMENT PHOSPHORUS CONCENTRATION AND PLANT DENSITY. Chinese Journal of Plant Ecology, 2007, 31(4): 599-606. DOI: 10.17521/cjpe.2007.0076
植株密度 Plant density (PD) | 底泥磷含量(SP) Sediment phosphorus concentration (SP) (mg·g-1) | ||
---|---|---|---|
低磷SP Low SP (LSP) 27.56 ± 0.78 | 中磷SP Median SP (MSP) 52.85 ± 1.30 | 高磷SP High SP (HSP) 115.61 ± 2.72 | |
4株/箱4 individuals per container (PD4) | LSP-PD4 | MSP-PD4 | HSP-PD4 |
8株/箱8 individuals per container (PD8) | LSP-PD8 | MSP-PD8 | HSP-PD8 |
12株/箱12 individuals per container (PD12) | LSP-PD12 | MSP-PD12 | HSP-PD12 |
表1 底泥磷含量和植株密度设置
Table 1 Experimental setup of sediment phosphorus concentration and plant density
植株密度 Plant density (PD) | 底泥磷含量(SP) Sediment phosphorus concentration (SP) (mg·g-1) | ||
---|---|---|---|
低磷SP Low SP (LSP) 27.56 ± 0.78 | 中磷SP Median SP (MSP) 52.85 ± 1.30 | 高磷SP High SP (HSP) 115.61 ± 2.72 | |
4株/箱4 individuals per container (PD4) | LSP-PD4 | MSP-PD4 | HSP-PD4 |
8株/箱8 individuals per container (PD8) | LSP-PD8 | MSP-PD8 | HSP-PD8 |
12株/箱12 individuals per container (PD12) | LSP-PD12 | MSP-PD12 | HSP-PD12 |
图1 乌菱的主要生长指标对底泥磷含量与植株密度的响应
Fig.1 The responses of the main growth variables of Trapa bicornis to sediment phosphorus concentration and plant density 平均值 ± 标准差Mean ± SE LSP:低底泥磷含量Low sediment phosphorus concentration MSP:中底泥磷含量Median sediment phosphorus concentration HSP:高底泥磷含量High sediment phosphorus concentration PD4:每箱4株4 individuals per container PD8:每箱8株8 individuals per container PD12:每箱12株12 individuals per container 图中上方不同的字母表示不同处理之间通过Duncan法进行多重检验得出的显著性差异 Different upper letters indicate significant differences between treatments according to the results of post-hoc with Duncan test
图2 乌菱磷含量对底泥磷含量和植株密度的响应 图注见图1
Fig.2 The responses of plant P concentration of Trapa bicornis to sediment phosphorus concentration and plant density Notes see Fig. 1
图3 乌菱生物量异速生长关系分析 图中排在横行的变量为x轴,纵行排列的为y轴,所有数据都在做相关性分析前采用以10为底数的对数处理。图的下方列出线性回归方程,随后为回归系数及相关显著性p,*: p<0.05; **: p<0.01; ***: p<0.001见图1
Fig.3 The mass-mass allometric relationships of Trapa bicornis Variables listed in the row were viewed as x-axis, while the variables listed in column were viewed as y-axis. Data were logged. Linear regression formulae are shown, followed with regression coefficients and statistical significance values of p. *: p<0.05; **: p<0.01; ***: p<0.001 LSP、MSP、HSP、PD4、PD8、PD12: See Fig. 1
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