Plants with phytotoxic potential: Wollemi pine (Wollemia nobilis)

Alexa Seal, James Pratley, Terrence Haig, Min An, Hanwen Wu

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Herbicide resistance in annual ryegrass (ARG, Lolium rigidum) threatens the quality and yield of winter wheat crops in Australia, prompting research to discover novel natural plant compounds with herbicidal properties. Due to its novel nature and potentially interesting chemistry, the Australian native, Wollemi pine (Wollemia nobilis), was tested for its ability to suppress ARG growth and its feasibility for use in weed control strategies. The leaf extract of Wollemi pine significantly inhibited the growth of ARG and wild radish (Raphanus raphanistrum) in laboratory bioassays at concentrations above 1% extract. In soil trials, the 100% extract (100 g dried plant material/L) inhibited the dry weight of ARG by 25%. The addition of a wetting agent to the extract increased the suppression of ARG to 80% which was as phytotoxic as a 4-fold increase in the extract concentration ('400%' extract). Using bioassay-guided fractionation, the most phytotoxic fraction was identified and further analysed via GC/MS. Several compounds not previously identified in Wollemi pine leaf extracts have been identified, namely, 2-propylphenol, 3,4-dimethoxyphenol, 2-methoxybenzoic acid, vanillyl alcohol and isovanillic acid. These results suggest that Wollemi pine is an important potential source of compounds for the control of ARG and wild radish in winter crops.
Original languageEnglish
Pages (from-to)52-57
Number of pages6
JournalAgriculture, Ecosystems and Environment
Volume135
Issue number1-2
DOIs
Publication statusPublished - Jan 2010

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bioassay
Pinus
crop
acid
winter
weed control
extracts
wetting
herbicide
alcohol
radishes
fractionation
leaf extracts
wheat
fold
herbicidal properties
bioassays
Raphanus raphanistrum
Lolium rigidum
herbicide resistance

Cite this

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title = "Plants with phytotoxic potential: Wollemi pine (Wollemia nobilis)",
abstract = "Herbicide resistance in annual ryegrass (ARG, Lolium rigidum) threatens the quality and yield of winter wheat crops in Australia, prompting research to discover novel natural plant compounds with herbicidal properties. Due to its novel nature and potentially interesting chemistry, the Australian native, Wollemi pine (Wollemia nobilis), was tested for its ability to suppress ARG growth and its feasibility for use in weed control strategies. The leaf extract of Wollemi pine significantly inhibited the growth of ARG and wild radish (Raphanus raphanistrum) in laboratory bioassays at concentrations above 1{\%} extract. In soil trials, the 100{\%} extract (100 g dried plant material/L) inhibited the dry weight of ARG by 25{\%}. The addition of a wetting agent to the extract increased the suppression of ARG to 80{\%} which was as phytotoxic as a 4-fold increase in the extract concentration ('400{\%}' extract). Using bioassay-guided fractionation, the most phytotoxic fraction was identified and further analysed via GC/MS. Several compounds not previously identified in Wollemi pine leaf extracts have been identified, namely, 2-propylphenol, 3,4-dimethoxyphenol, 2-methoxybenzoic acid, vanillyl alcohol and isovanillic acid. These results suggest that Wollemi pine is an important potential source of compounds for the control of ARG and wild radish in winter crops.",
keywords = "Annual ryegrass, Herbicide resistance, Phenolics, Phytotoxicity, Solvent extraction, Terpenes, Wollemi pine",
author = "Alexa Seal and James Pratley and Terrence Haig and Min An and Hanwen Wu",
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language = "English",
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Plants with phytotoxic potential : Wollemi pine (Wollemia nobilis). / Seal, Alexa; Pratley, James; Haig, Terrence; An, Min; Wu, Hanwen.

In: Agriculture, Ecosystems and Environment, Vol. 135, No. 1-2, 01.2010, p. 52-57.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Plants with phytotoxic potential

T2 - Wollemi pine (Wollemia nobilis)

AU - Seal, Alexa

AU - Pratley, James

AU - Haig, Terrence

AU - An, Min

AU - Wu, Hanwen

N1 - Imported on 12 Apr 2017 - DigiTool details were: month (773h) = Jan 2010; Journal title (773t) = Agriculture, Ecosystems and Environment. ISSNs: 0167-8809;

PY - 2010/1

Y1 - 2010/1

N2 - Herbicide resistance in annual ryegrass (ARG, Lolium rigidum) threatens the quality and yield of winter wheat crops in Australia, prompting research to discover novel natural plant compounds with herbicidal properties. Due to its novel nature and potentially interesting chemistry, the Australian native, Wollemi pine (Wollemia nobilis), was tested for its ability to suppress ARG growth and its feasibility for use in weed control strategies. The leaf extract of Wollemi pine significantly inhibited the growth of ARG and wild radish (Raphanus raphanistrum) in laboratory bioassays at concentrations above 1% extract. In soil trials, the 100% extract (100 g dried plant material/L) inhibited the dry weight of ARG by 25%. The addition of a wetting agent to the extract increased the suppression of ARG to 80% which was as phytotoxic as a 4-fold increase in the extract concentration ('400%' extract). Using bioassay-guided fractionation, the most phytotoxic fraction was identified and further analysed via GC/MS. Several compounds not previously identified in Wollemi pine leaf extracts have been identified, namely, 2-propylphenol, 3,4-dimethoxyphenol, 2-methoxybenzoic acid, vanillyl alcohol and isovanillic acid. These results suggest that Wollemi pine is an important potential source of compounds for the control of ARG and wild radish in winter crops.

AB - Herbicide resistance in annual ryegrass (ARG, Lolium rigidum) threatens the quality and yield of winter wheat crops in Australia, prompting research to discover novel natural plant compounds with herbicidal properties. Due to its novel nature and potentially interesting chemistry, the Australian native, Wollemi pine (Wollemia nobilis), was tested for its ability to suppress ARG growth and its feasibility for use in weed control strategies. The leaf extract of Wollemi pine significantly inhibited the growth of ARG and wild radish (Raphanus raphanistrum) in laboratory bioassays at concentrations above 1% extract. In soil trials, the 100% extract (100 g dried plant material/L) inhibited the dry weight of ARG by 25%. The addition of a wetting agent to the extract increased the suppression of ARG to 80% which was as phytotoxic as a 4-fold increase in the extract concentration ('400%' extract). Using bioassay-guided fractionation, the most phytotoxic fraction was identified and further analysed via GC/MS. Several compounds not previously identified in Wollemi pine leaf extracts have been identified, namely, 2-propylphenol, 3,4-dimethoxyphenol, 2-methoxybenzoic acid, vanillyl alcohol and isovanillic acid. These results suggest that Wollemi pine is an important potential source of compounds for the control of ARG and wild radish in winter crops.

KW - Annual ryegrass

KW - Herbicide resistance

KW - Phenolics

KW - Phytotoxicity

KW - Solvent extraction

KW - Terpenes

KW - Wollemi pine

U2 - 10.1016/j.agee.2009.08.009

DO - 10.1016/j.agee.2009.08.009

M3 - Article

VL - 135

SP - 52

EP - 57

JO - Agro-Ecosystems

JF - Agro-Ecosystems

SN - 0167-8809

IS - 1-2

ER -