Weeds for weed control: Asteraceae essential oils as natural herbicides

Benvenuti, Stefano; Cioni, P. L.; Flamini, Guido; Pardossi, Alberto

doi:10.1111/wre.12266

Cited by 52 publications

(48 citation statements)

References 34 publications

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“…Phytotoxic compounds have diversified modes of action and affect the growth of undesired plants (Lipkus et al, 2008;Ullah, Haq, & Mirza, 2015). Thus, plant materials having phytotoxic potential are suggested as biological herbicides in agriculture (Benvenuti, Cioni, Flamini, & Pardossi, 2017;Gomaa & AbdElgawad, 2012). Many reports on the phytotoxicity of plants have already been documented to control weeds in agricultural practices (Islam, Ohno, Suenaga, & Kato-Noguchi, 2014;Mushtaq, Cheema, Khaliq, & Naveed, 2010;Suwitchayanon, Ohno, Suenaga, & Kato-Noguchi, 2017).…”

Section: Introductionmentioning

confidence: 99%

Isolation and identification of two phytotoxic compounds from the medicinal plant Cassia alata L.

Das

Iwasaki

Suenaga

et al. 2020

Weed Biology and Management

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Cassia alata (Caesalpiniaceae), an ornamental shrub, has many biological properties such as antifungal and antibacterial activities. Several bioactive and phytotoxic compounds have already been isolated from C. alata. Phytotoxic substances from plants have drawn attention as an alternative biological approach to control weeds. Thus, we conducted this research to explore other phytotoxic compounds in C. alata leaves. Aqueous methanol extracts of C. alata leaves strongly inhibited the seedling growth of broccoli, cabbage, cress, radish and rapeseed, in which the level of inhibition correlated with concentration. Two active compounds were isolated through chromatographies and identified using spectral data as (S)‐4‐(3‐hydroxybutyl)phenol [(+)‐rhododendrol] and (E)‐4‐((1R,4R)‐4‐hydroxy‐2,6,6‐trimethylcyclohex‐2‐en‐1‐yl)but‐3‐en‐2‐one [3‐hydroxy‐α‐ionone]. These two active compounds inhibited the growth of cress seedlings in a concentration‐dependent manner. The required concentrations for 50% growth inhibition (I50 value) of cress seedlings were 192.0–296.1 μM for (+)‐rhododendrol and 132.4–195.3 μM for 3‐hydroxy‐α‐ionone. These results indicate that the two phytotoxic compounds play a part in the phytotoxic activity of C. alata leaves.

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Section: Introductionmentioning

confidence: 99%

Isolation and identification of two phytotoxic compounds from the medicinal plant Cassia alata L.

Das

Iwasaki

Suenaga

et al. 2020

Weed Biology and Management

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“…Plant secondary metabolites with recognized ecological functions (i.e., allelochemicals) offer an unparalleled source of structural diversity, with little MOA overlap with existing herbicides [1,7]. Especially, volatile organic compounds (VOCs) have aroused great interest as natural herbicides [8,9]. Also, plant secondary metabolites are putatively more environmentally friendly and rapidly degrade [1,10,11].…”

Section: Introductionmentioning

confidence: 99%

Cytisus scoparius and Ulex europaeus Produce Volatile Organic Compounds with Powerful Synergistic Herbicidal Effects

2019

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New herbicides based on natural products are claimed to address weed resistance and environmental concerns related to synthetic herbicides. In our previous studies, certain volatile organic compounds (VOCs) produced by Ulex europaeus and Cytisus scoparius were argued to be responsible for the phytotoxicity of both shrub species. Interactions among VOCs were hypothesized to explain the inconsistency between the effects of the identified pure compounds and those naturally emitted from fresh plant material. In this work, eugenol, verbenone, terpinen-4-ol, α-terpineol, and linalool were assayed as binary mixtures of Amaranthus retroflexus and Digitaria sanguinalis. Powerful synergistic inhibitory effects were revealed for germination and early growth. Only 3.1 ppm of verbenone was enough to inhibit A. retroflexus germination when paired to other VOCs. Eugenol was capable of exacerbating the effects of terpinen-4-ol on A. retroflexus, even though it was innocuous when acting alone at 12.5 ppm. The verbenone and linalool pair produced very significant synergistic effects in terms of D. sanguinalis germination. The synergistic effects were predominantly irreversible for D. sanguinalis, since seeds exposed to paired VOCs were unable to recover their germination capacity after removing the phytotoxins or produced damaged seedlings. Both shrub species have been revealed as sources of natural herbicide molecules, with promising synergistic modes of action that deserve to be studied in depth.

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“…Such plant materials are suggested to have potential as sources of mulches and herbicides to reduce weeds (Weston ; Prasanta & Inderjit ; Benvenuti et al . ). Therefore, investigating phytotoxic activity and substances of more plant materials may be helpful in developing weed control options (Weston ; Prasanta & Inderjit ; Benvenuti et al .…”

mentioning

confidence: 97%

“…Therefore, investigating phytotoxic activity and substances of more plant materials may be helpful in developing weed control options (Weston ; Prasanta & Inderjit ; Benvenuti et al . ).…”

mentioning

confidence: 97%

“…Certain plant materials exhibit phytotoxic activity as well, and contain many kinds of phytotoxic substances (Prasanta & Inderjit 2003;Macias et al 2007). Such plant materials are suggested to have potential as sources of mulches and herbicides to reduce weeds (Weston 1996;Prasanta & Inderjit 2003;Benvenuti et al 2017). Therefore, investigating phytotoxic activity and substances of more plant materials may be helpful in developing weed control options (Weston 1996;Prasanta & Inderjit 2003;Benvenuti et al 2017).…”

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confidence: 99%

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Phytotoxic activity of Chinese violet (Asystasia gangetica (L.) T. Anderson) and two phytotoxic substances

Suzuki

Chozin

Iwasaki

et al. 2019

Weed Biology and Management

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Chinese violet (Asystasia gangetica (L.) T. Anderson) is a perennial invasive weed belonging to Acanthaceae. Leaves of this weed have been suggested to possess phytotoxic activity. However, phytotoxic substances in this weed have not yet been reported. Therefore, the present study investigated phytotoxic activity of Chinese violet extracts and phytotoxic substances. The extracts of Chinese violet leaves inhibited the root and shoot growth of cress, lettuce, alfalfa, barnyard grass, ryegrass, and timothy, where the level of inhibition increased with increasing extract concentrations. Bioassay‐guided separations of the extracts led to isolation of two phytotoxic substances, indole‐3‐carboxaldehyde and (6R,9S)‐3‐oxo‐α‐ionol. Indole‐3‐carboxaldehyde significantly inhibited the root and shoot growth of cress at concentrations ≥100 and 30 μmol L−1, respectively, and concentrations of the substance required for 50% growth inhibition were 210 and 127 μmol L−1 for cress roots and shoots, respectively. The other substance, (6R,9S)‐3‐oxo‐α‐ionol, was reported to have strongly inhibited cress roots and shoots. The present results suggest that Chinese violet contains two phytotoxic substances indole‐3‐carboxaldehyde and (6R,9S)‐3‐oxo‐α‐ionol, and those substances may play an important role in the phytotoxic activity of Chinese violet.

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Weeds for weed control: Asteraceae essential oils as natural herbicides

Cited by 52 publications

References 34 publications

Isolation and identification of two phytotoxic compounds from the medicinal plant Cassia alata L.

Isolation and identification of two phytotoxic compounds from the medicinal plant Cassia alata L.

Cytisus scoparius and Ulex europaeus Produce Volatile Organic Compounds with Powerful Synergistic Herbicidal Effects

Phytotoxic activity of Chinese violet (Asystasia gangetica (L.) T. Anderson) and two phytotoxic substances

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