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Resource conservation strategy helps explain patterns of biological invasion in a low-N environment
Biochemical Systematics and Ecology ( IF 1.6 ) Pub Date : 2020-12-22 , DOI: 10.1016/j.bse.2020.104205
Guangqian Ren , Furong He , Jianfan Sun , Wenjie Hu , Ahmad Azeem , Shanshan Qi , Bin Yang , Miaomiao Cui , Kun Jiang , Daolin Du

Several studies have been conducted on the distribution of carbon (C) and nitrogen (N) in plant, however, there has been rare data linking Ecological Stoichiometry to plant invasion success, especially in a low-N environment. Accordingly, an experiment in this study was performed to explore the nutrition distribution and stoichiometry among various organs in plant, contributing to plant invasion. According to the results of this study, both invasive and native species exhibited a higher C, N concentration and lower C/N ratio in their leaf compared with stem and root overall (p < 0.05), the stem exhibited the lower N concentration, higher C concentration and C/N ratio compared with leaf and root overall (p < 0.05). In addition, C and N concentrations of invasive Solidago canadensis were significantly lower, while the C/N and Relative Growth Rate (RGR) were significantly higher than those of the native Artemisia argyi (p < 0.05). As revealed from the mentioned results, plant invasion success in low-N environmental conditions was dependent on the following: 1) Invasive used more conservative nutrients strategy (higher C/N ratio), instead of the high capacity to retain or resorb nutrients compared with natives; 2) Invasive species (higher RGR) had less N-limited growth as compared with natives. Furthermore, this study presented baseline information to describe the internal mechanism of plant invasion, thereby helping predict and control invasive species.



中文翻译:

资源节约策略有助于解释低氮环境中生物入侵的模式

关于植物中碳(C)和氮(N)的分布已经进行了一些研究,但是,很少有数据将生态化学计量学与植物入侵成功联系起来,尤其是在低氮环境中。因此,进行了本研究中的实验以探索植物中各个器官之间的营养分布和化学计量,从而有助于植物的入侵。根据这项研究的结果,与茎和根的整体相比,入侵物种和原生物种在其叶片中均表现出较高的C,N浓度和较低的C / N比(p  <0.05),茎部具有较低的N浓度,较高。碳浓度和碳氮比与叶和根的总体相比(p  <0.05)。另外,C和N浓度的侵入性加拿大一枝黄花显着降低,而C / N和相对生长率(RGR)显着高于天然艾蒿p  <0.05)。从上述结果可以看出,低氮环境条件下植物入侵的成功与否取决于:1)入侵植物采用了更为保守的养分策略(较高的碳氮比),而不是具有较高的保留或吸收养分的能力。本地人 2)与本地人相比,外来入侵物种(较高的RGR)具有较少的N限制生长。此外,这项研究提出了基准信息来描述植物入侵的内部机制,从而有助于预测和控制入侵物种。

更新日期:2020-12-23
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