不同邻居物种的基因型多样性对冷蒿生长的影响
发布时间：2018-10-25 20:45
【摘要】：植物物种多样性与基因型多样性对群落的结构和功能具有重要的生态作用,近年来植物基因型多样性对植物间相互作用的影响已成为研究者关心的重要科学问题。实验选择退化草原优势种冷蒿(Artemisia frigida)为目标植物,稳定群落建群种羊草(Leymus chinensis)和群落伴生种洽草(Koeleria cristata)为邻居植物,来研究基因型多样性不同的邻居植物对冷蒿生长表现(株高、地上生物量、地下生物量和总生物量)的影响,并通过测量植物相对竞争强度及邻居植物性状变异来进一步探究邻居植物基因型多样性对目标植物影响的内在机制。结果表明:(1)邻居物种为羊草时,基因型多样性对冷蒿的生长表现影响显著,当邻居为6基因型时,冷蒿的株高、地上生物量以及总生物量显著低于单基因型和3基因型时的表现(P0.05),且相对竞争强度高于其他两种处理;而邻居物种为洽草时,基因型多样性对冷蒿所有观测指标以及相对竞争强度的影响均不显著(P0.05)。(2)利用主成分分析法来分析基因型多样性对自身性状变异的影响发现,邻居物种为羊草时,基因型多样性对性状变异响应显著,主要表现为3基因型时,羊草种群的株高、总生物量、地上生物量显著高于单基因型时的表现(P0.05);而邻居物种为洽草时,基因型多样性对性状变异影响不显著(P0.05)。(3)邻居物种为羊草时,羊草总生物量和比叶面积与冷蒿的地上生物量和总生物量呈显著负相关(P0.05);邻居物种为洽草时,洽草各性状与冷蒿性状间无显著相关性(P0.05)。实验结果揭示,基因型多样性对目标植物生长的效应受邻居植物种类的影响,稳定群落建群种羊草高基因型组合能显著抑制冷蒿的生长,这可能与羊草高基因型多样性种群性状变异大且对冷蒿有较高的相对竞争强度有关。所得结果为建群种基因型多样性影响种间相互作用提供了实验证据,为草原的合理利用和保护提供了理论指导。
[Abstract]:Plant species diversity and genotypic diversity play an important ecological role in community structure and function. In recent years, the influence of plant genotypic diversity on plant interaction has become an important scientific issue concerned by researchers. The dominant species of Artemisia frigida (Artemisia frigida) was selected as the target plant, the stable community (Leymus chinensis) and the associated species (Koeleria cristata) were selected as neighbor plants. To study the effects of neighbor plants with different genotypes on the growth performance (plant height, aboveground biomass, underground biomass and total biomass) of Artemisia frigida. By measuring the relative competition intensity of plants and the variation of neighbor plant traits, the internal mechanism of the influence of neighbor plant genotypic diversity on target plants was further explored. The results showed that: (1) when the neighbor species was Leymus chinensis, genotypic diversity had a significant effect on the growth performance of Artemisia frigida. The aboveground biomass and total biomass were significantly lower than those of single genotype and 3 genotype (P0.05), and the relative competitive intensity was higher than that of the other two treatments. And when the neighbor species is talking about grass, The effect of genotypic diversity on all observed indexes and relative competition intensity of Artemisia frigida was not significant (P0.05). (2). The effect of genotype diversity on variation of its own traits was analyzed by principal component analysis (P05). When the neighbor species was Leymus chinensis, the genotypic diversity was significantly responsive to the variation of traits. The plant height, total biomass and aboveground biomass of the population of Leymus chinensis were significantly higher than those of the single genotype (P0.05). However, when neighbor species were consistent with grass, genotype diversity had no significant effect on trait variation (P0.05). (3) when neighbor species was Leymus chinensis. The total biomass and specific leaf area of Artemisia chinensis were negatively correlated with the aboveground biomass and total biomass of Artemisia frigida (P0.05). There was no significant correlation between the characters of Artemisia officinalis and the characters of Artemisia frigida when the neighbor species was consistent (P0.05). The results showed that the effect of genotypic diversity on target plant growth was affected by neighbor plant species, and the high genotype combination of stable community could significantly inhibit the growth of Artemisia frigida. This may be related to the high genotypic diversity of Leymus chinensis and the high relative competitive intensity of Artemisia chrysanthemi. The results provided experimental evidence for the influence of genotypic diversity on interspecific interactions and provided theoretical guidance for the rational utilization and protection of grassland.
【作者单位】： 南开大学生命科学学院;
【基金】：国家自然科学基金项目(31570427)
【分类号】：Q948
本文编号：2294789
[Abstract]:Plant species diversity and genotypic diversity play an important ecological role in community structure and function. In recent years, the influence of plant genotypic diversity on plant interaction has become an important scientific issue concerned by researchers. The dominant species of Artemisia frigida (Artemisia frigida) was selected as the target plant, the stable community (Leymus chinensis) and the associated species (Koeleria cristata) were selected as neighbor plants. To study the effects of neighbor plants with different genotypes on the growth performance (plant height, aboveground biomass, underground biomass and total biomass) of Artemisia frigida. By measuring the relative competition intensity of plants and the variation of neighbor plant traits, the internal mechanism of the influence of neighbor plant genotypic diversity on target plants was further explored. The results showed that: (1) when the neighbor species was Leymus chinensis, genotypic diversity had a significant effect on the growth performance of Artemisia frigida. The aboveground biomass and total biomass were significantly lower than those of single genotype and 3 genotype (P0.05), and the relative competitive intensity was higher than that of the other two treatments. And when the neighbor species is talking about grass, The effect of genotypic diversity on all observed indexes and relative competition intensity of Artemisia frigida was not significant (P0.05). (2). The effect of genotype diversity on variation of its own traits was analyzed by principal component analysis (P05). When the neighbor species was Leymus chinensis, the genotypic diversity was significantly responsive to the variation of traits. The plant height, total biomass and aboveground biomass of the population of Leymus chinensis were significantly higher than those of the single genotype (P0.05). However, when neighbor species were consistent with grass, genotype diversity had no significant effect on trait variation (P0.05). (3) when neighbor species was Leymus chinensis. The total biomass and specific leaf area of Artemisia chinensis were negatively correlated with the aboveground biomass and total biomass of Artemisia frigida (P0.05). There was no significant correlation between the characters of Artemisia officinalis and the characters of Artemisia frigida when the neighbor species was consistent (P0.05). The results showed that the effect of genotypic diversity on target plant growth was affected by neighbor plant species, and the high genotype combination of stable community could significantly inhibit the growth of Artemisia frigida. This may be related to the high genotypic diversity of Leymus chinensis and the high relative competitive intensity of Artemisia chrysanthemi. The results provided experimental evidence for the influence of genotypic diversity on interspecific interactions and provided theoretical guidance for the rational utilization and protection of grassland.
【作者单位】： 南开大学生命科学学院;
【基金】：国家自然科学基金项目(31570427)
【分类号】：Q948
【相似文献】
相关期刊论文 前4条
1 宛涛;孙启忠;蔡萍;孟显国;伊卫东;王伟;;内蒙古不同生态区冷蒿染色体核型观察[J];西北植物学报;2011年03期
2 杜占池 ,杨宗贵;温度对冷蒿枝条光合和暗呼吸作用的影响[J];植物学通报;1993年S1期
3 赵爱芬,周海燕;沙地冷蒿种群的耐牧机理研究初报[J];中国沙漠;1999年S1期
4 王静,杨持,韩文权,刘美玲;刈割强度对冷蒿可溶性碳水化合物的影响[J];生态学报;2003年05期
相关硕士学位论文 前2条
1 贾丽;冷蒿抗氧化防御系统对机械损伤的响应机制[D];浙江农林大学;2015年
2 左照江;冷蒿VOCs成分分析及其对植物生长发育的影响[D];内蒙古农业大学;2009年
，本文编号：2294789
本文链接：https://www.wllwen.com/kejilunwen/jiyingongcheng/2294789.html
最近更新
教材专著
