Inhibitory effect of July-cuytting on the translocation to subterranean part of an invasive species, <i>Rudbeckia laciniata</i> L.

Toshihiro SUGIURA; Aimi KOBAYASHI; Chihiro TATSUMI; Mitsuhisa BABA; Yuma SHIMAMOTO

doi:10.7211/jjsrt.46.91

Inhibitory effect of July-cuytting on the translocation to subterranean part of an invasive species, Rudbeckia laciniata L.

Journal of the Japanese Society of Revegetation Technology ◽

10.7211/jjsrt.46.91 ◽

2020 ◽

Vol 46 (1) ◽

pp. 91-94

Author(s):

Toshihiro SUGIURA ◽

Aimi KOBAYASHI ◽

Chihiro TATSUMI ◽

Mitsuhisa BABA ◽

Yuma SHIMAMOTO

Keyword(s):

Invasive Species ◽

Inhibitory Effect ◽

Rudbeckia Laciniata

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The combined treatments of Canada goldenrod leaf extracts and cadmium pollution confer an inhibitory effect on seed germination and seedling development of lettuce

Australian Journal of Botany ◽

10.1071/bt18046 ◽

2018 ◽

Vol 66 (4) ◽

pp. 331 ◽

Cited By ~ 11

Author(s):

Congyan Wang ◽

Kun Jiang ◽

Bingde Wu ◽

Jiawei Zhou

Keyword(s):

Heavy Metals ◽

Invasive Species ◽

Seed Germination ◽

Native Species ◽

Inhibitory Effect ◽

Seedling Development ◽

Combined Treatments ◽

High Concentration ◽

Leaf Extracts ◽

Allelopathic Effects

Increasing levels of heavy metals are released into ecosystems. The influence of heavy metal pollution on successful invasive species has raised considerable interest, particularly regarding potential allelopathic effects on seed germination and seedling development of native species. Adding heavy metals may alter or even enhance such allelopathic effects of invasive species. The aim of the present study was to address the combined treatments of the invasive species Canada goldenrod (Solidago canadensis L.) leaf extracts and cadmium (Cd) pollution on seed germination and seedling development of the homologous native species lettuce (Lactuca sativa L.). Results showed that the combined treatments of Canada goldenrod leaf extracts and Cd pollution significantly decreased seed germination and seedling development of lettuce compared with the control. In addition, the indices of allelopathic effects for all seed germination and seedling development indices of lettuce were less than zero under the combined treatments of high concentration of Canada goldenrod leaf extracts and Cd pollution (regardless of concentration). Thus, the combined treatments of high concentration of Canada goldenrod leaf extracts and Cd pollution pose an inhibitory effect on seed germination and seedling development of lettuce. Further, the combined treatments of high concentration of Canada goldenrod leaf extracts and Cd pollution (regardless of concentration) cause more toxic effects than the combined treatments of low concentration of Canada goldenrod leaf extracts and Cd pollution (regardless of concentration) on all seed germination and seedling development indices of lettuce. Thus, the inhibitory effects of Canada goldenrod on the seed germination and seedling development of co-occurring native species may be intensified at heavy invasion degrees under increased heavy metal pollution. Subsequently, the competitiveness and fitness of native species may be notably decreased via the reduced seed germination and seedling development and then the notorious invader can establish progressively-growing populations in the colonised ecosystems.

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