Allelopathy effects of invasive alien <i>Ageratina adenophora</i> on native shrub species of chir pine forest in the central Himalaya, India

Kumar, Mukesh; Garkoti, Satish Chandra

doi:10.1080/13416979.2021.2002505

Cited by 13 publications

(7 citation statements)

References 38 publications

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“…Notably, their inhibitory effects on seedling growth were higher in root growth than hypocotyl growth. This difference is proposed to be because the roots directly had contact with the extracts, causing them to have a higher sensitivity to allelopathy [16][17][18]. Our study also showed that thermal treatment did not remove the allelopathic effect of the two conifer needles on root growth.…”

Section: Discussionmentioning

confidence: 55%

Volatile and Non-Volatile Allelopathic Characteristics in Thermally Processed Needles of Two Conifers

Gil

Hong

Duan

et al. 2022

Plants

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With allelopathic composts, potential merits for preventing initial weed infestations have been observed in crop transplantation. However, previous studies have rarely investigated whether high temperatures, generated during composting, decrease allelopathic ability. This study evaluated the thermal allelopathic effect of two coniferous plants (Pinus densiflora and P. koraiensis) on Brassica napus germination and seedling growth using their characterized allelochemical destinations. The 90 °C dry treatment of P. densiflora extract exhibited stronger inhibitory effect on germination than its 30 °C dry treatment. In a range from 0.25 to 1 mg mL−1, the germination rate was decreased to 38.1 and 64.3% of control with P. densiflora extract dried at 90 and 30 °C, respectively. However, P. koraiensis showed potent inhibition of the germination process with no statistical difference in inhibitory effects regardless of the dry temperature. Regarding B. napus seedling root growth, the allelopathic effects of aqueous extracts of both conifers were not reduced with the 90 °C treatment, but it was lost in seedling shoot growth. GC-MS/MS confirmed that high temperature treatment drastically decreased volatile contents to 53.2% in P. densiflora, resulting in reduced allelopathic abilities. However, a relatively lower decrease to 83.1% in volatiles of P. koraiensis accounts for less loss of the root-specific inhibitory effect on B. napus seedlings even after 90 °C treatment. Foliar tissues of both conifers with species-specific thermal resistance have potentially valuable functions regarding allelopathic use in horticultural compost processing ingredients, demonstrating their weed control ability during the early cultivation season where crops are transplanted in the facilitated area.

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Section: Discussionmentioning

confidence: 55%

Volatile and Non-Volatile Allelopathic Characteristics in Thermally Processed Needles of Two Conifers

Gil

Hong

Duan

et al. 2022

Plants

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“…EIP can incur significant phytotoxicity on the growth performance of adjacent species, particularly on seed germination and seedling growth, thus accelerating their further invasion process (Xie et al 2010;Cheng et al 2021;Wu et al 2021;Kumar and Garkoti 2022). This study showed that S. canadensis dramatically decreased seed germination and root length of L. sativa.…”

Section: Discussionmentioning

confidence: 73%

“…One of the major mechanisms for a successful invasion of EIP is the novel weapons hypothesis (Callaway and Ridenour 2004), which implies that numerous EIP can win the race for interspecific competition with adjacent species mainly via the release of secondary substances (known as allelochemicals). The generated allelochemicals by EIP can impose significant disadvantages on seed germination and seedling growth of adjacent species (Xie et al 2010;Cheng et al 2021;Wu et al 2021;Kumar and Garkoti 2022). Asteraceae supplies the largest number of EIP species in China currently at the family level, i.e., 92 EIP species belonging to Asteraceae in China, which accounts for about 17.86% of all EIP species (Yan et al 2014;Wang et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Drought stress intensifies the phytotoxicity of five Asteraceae exotic invasive plants

Zhong

et al. 2023

Israel J. Plant Sci.

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The phytotoxicity of exotic invasive plants (EIP) is vital for their successful invasion. At the family level, Asteraceae contains the largest number of EIP species in China. Drought stress may affect the phytotoxicity of EIP by altering the production and secretion of allelochemicals. Therefore, it is important to estimate the phytotoxicity of multiple EIP under drought stress. In this study, the phytotoxicity of five Asteraceae EIP, i.e., Solidago canadensis L., Aster subulatus Michx., Bidens pilosa L., Erigeron annuus (L.) Pers., and Conyza canadensis (L.) Cronq., were estimated using leaf extracts. Their effects on seed germination and seedling growth of the horticultural Asteraceae species Lactuca sativa L. under drought stress (simulated by polyethylene glycol-6000) were assessed. These five Asteraceae EIP, particularly S. canadensis, inhibited seed germination of L. sativa. Aster subulatus, B. pilosa, E. annuus, and C. canadensis increased seedling growth of L. sativa. The phytotoxicity of these five Asteraceae EIP decreased in the following order: S. canadensis > E. annuus > A. subulatus > B. pilosa ≈ C. canadensis. Drought stress intensified the phytotoxicity of all five Asteraceae EIP. The level of stress intensity mediated by these five Asteraceae EIP, particularly by S. canadensis, A. subulatus, and B. pilosa, increased with increasing degree of drought stress. Thus, an increasing growing degree of drought stress may accelerate the invasion process of these five Asteraceae EIP via the effects of intensified phytotoxicity on growth performance of adjacent species, particularly on seed germination and seedling growth.

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“…One of the important factors for the successful invasion of several invasive plants may be the allelopathic chemicals released by them, which can reduce the growth performance (especially seed germination and seedling growth; abbreviated later as Seger-Segro) of neighboring plants (Carvalho et al . 2021, Jeddi et al 2021, Kalisz et al 2021, Kumar and Garkoti 2022). So far, most allelopathy studies focus on only one invasive plant, but comparative analyses of the allelopathy of multiple invasive plants have not been performed.…”

Section: Introductionmentioning

confidence: 99%

Does Salt Stress Intensify the Allelopathic Effect of Four Asteraceae Invasive Plants?

Li,

Zhong

et al. 2024

Polish Journal of Ecology

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Allelopathy effects of invasive alien Ageratina adenophora on native shrub species of chir pine forest in the central Himalaya, India

Cited by 13 publications

References 38 publications

Volatile and Non-Volatile Allelopathic Characteristics in Thermally Processed Needles of Two Conifers

Volatile and Non-Volatile Allelopathic Characteristics in Thermally Processed Needles of Two Conifers

Drought stress intensifies the phytotoxicity of five Asteraceae exotic invasive plants

Does Salt Stress Intensify the Allelopathic Effect of Four Asteraceae Invasive Plants?

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