Allelopathic effects of Egeria densa on the growth and morphology of Chlorella vulgaris

IF 0.9 4区环境科学与生态学 Q4 LIMNOLOGY

Annales De Limnologie-international Journal of Limnology Pub Date : 2023-01-01 DOI:10.1051/limn/2023004

Dujuan Dai, Yue Yang, Feihu Wang, Yang Zhang, Man Zhang, Yunni Gao, Xiao-Bing Gao, Jing Dong, Xuejun Li, Mengyang Chang

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引用次数: 0

Abstract

Interspecific interaction between submerged macrophytes and phytoplankton is of great significance in sustaining ecological balance and restoring eutrophic water regions. In consideration of the diversified algal density and macrophytes biomass, the present study selected two biomass levels of Egeria densa and gradient densities of Chlorella vulgaris for simulated cultivation experimentation. E. densa could significantly suppress the growth and affect the morphology of C. vulgaris. The allelopathically inhibitory growth of C. vulgaris was suggested to increase with increasing biomass of E. densa and decreased with the elevating density of C. vulgaris. Higher amount of colonies and bigger colony size of C. vulgaris were detected after the treatment with 5 g/L of E. densa together with C. vulgaris (OD680 = 0.2) and treatment with 10 g/L E. densa together with C. vulgaris (OD680 = 0.05). Elevated extracellular and intracellular polysaccharides were detected, which possibly contributed to the morphological changes of C. vulgaris induced by E. densa.

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密叶草对小球藻生长和形态的化感作用

沉水植物与浮游植物的种间相互作用对维持生态平衡和恢复水体富营养化具有重要意义。考虑到藻类密度和大型植物生物量的多样性，本研究选择了小球藻(Egeria densa)和梯度密度小球藻(Chlorella vulgaris)两种生物量水平进行模拟栽培试验。密叶菊能显著抑制黄颡鱼的生长并影响其形态。化感抑制生长随密度的增加而增加，随密度的升高而降低。5 g/L赤霉病菌与赤霉病菌(OD680 = 0.2)和10 g/L赤霉病菌与赤霉病菌(OD680 = 0.05)处理后，赤霉病菌的菌落数量较多，菌落大小较大。胞外和胞内多糖含量均有升高，这可能与赤霉病菌引起的赤霉病菌形态变化有关。

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来源期刊

Annales De Limnologie-international Journal of Limnology 地学-湖沼学

CiteScore

2.20

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Annales de Limnologie - International Journal of Limnology publishes papers on the ecology of freshwater systems, ranging from studies of aquatic organisms, physical and chemical works which relate to the biological environment, to ecological applications and frameworks for water management directives. Main topics: Ecology of freshwater systems ; biodiversity, taxonomy, distribution patterns in space and time, biology of animals and plants ; experimental and conceptual studies which integrate laboratory and/or field work on physiology, population dynamics, biogeochemistry and nutrient dynamics, management, mathematical modelling ; techniques for sampling and chemical analyses, ecological applications, procedures which provide frameworks for environmental legislation.