Gavin Ash

University of Southern Queensland

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E. J. Cother

New South Wales Department of Primary Industries

John Harper

St. Jude Children's Research Hospital

Bree A.L. Wilson

University of Southern Queensland

Sandra Savocchia

Charles Sturt University

Benjamin J. Stodart

Charles Sturt University

Christopher Steel

Charles Sturt University

Farzad Jahromi

Charles Sturt University

Eric Cother

New South Wales Department of Primary Industries

Wayne Pitt

Wagga Wagga Base Hospital

V. M. Lanoiselet

Agriculture and Food

Cooperative Institutions

Charles Sturt University

New South Wales Department of Primary Industries

University of Southern Queensland

Commonwealth Scientific and Industrial Research Organisation

Wagga Wagga Base Hospital

Agricultural Institute

Agriculture and Food

University of Queensland

Wine Australia

Plant Biosecurity Cooperative Research Centre

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Comparison of two total cellular fatty acid analysis protocols to differentiateRhizoctonia oryzaeandR. oryzae-sativae

Mycologia (2005)

V. M. Lanoiselet E. J. Cother Norma J. Cother Gavin Ash John Harper

Two fatty acid analysis protocols (the MIDI and a modified MIDI method) were investigated for their utility to characterize and differentiate Rhizoctonia oryzae and R. oryzae-sativae isolates from four countries. Only the modified MIDI method permitted a clear differentiation between the two species, regardless of the isolates’ country of origin. The modified MIDI method gave the most consistent and reproducible fatty acid results. The failure of the MIDI method to differentiate between R. oryzae and R. oryzae-sativae isolates suggests that the 30 minutes saponification step is insufficient to completely break the cell wall of these two species. This study demonstrated that fatty acid profiles, obtained by the modified MIDI protocol, have the potential as a diagnostic tool for both R. oryzae and R. oryzae-sativae.

Rhizoctonia

MIDI

10.1080/15572536.2006.11832841

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Citations (7)

Kinetics of slow release of nitrogen fertiliser from multi-layered nanofibrous structures

Scientific Reports (2021)

Leila Javazmi Anthony Young Gavin Ash Tobias Low

Abstract Fertilisers are essential in modern agriculture to enhance plant growth, crop production and product quality. Recent research has focused on the development of delivery systems designed to prolong fertiliser release. This study introduces a new technology to encapsulate and release molecules of fertilisers by using multi-layered electrospun nanofibre as a carrier. Single-layer poly L-lactic acid (PLLA) nanofibres loaded with urea were fabricated using electrospinning. Triple-layer nanofibrous structures were produced by electrospinning polyhydroxybutyrate (PHB) nanofibres as external layers with PLLA nanofibres impregnated with urea fertiliser as the middle layer. Scanning electron microscopy (SEM) and Fourier transform infrared spectrophotometry (FTIR) were employed to characterize the morphology of electrospun nanofibres. Urea release dynamic was analysed using a total nitrogen instrument (TNM-1). The results indicated that triple-layered urea-impregnated nanofibrous structures led to lower initial rate of nitrogen release and slower release rate of cumulative nitrogen which extended for more than three months. It is concluded that triple-layer nanofibrous structures have the potential for slow release delivery of fertilisers.

Electrospinning

Polyhydroxybutyrate

10.1038/s41598-021-84460-x

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Citations (18)

Phomentrioloxin, a Fungal Phytotoxin with Potential Herbicidal Activity, and its Derivatives: A Structure–Activity Relationship Study

Journal of Agricultural and Food Chemistry (2013)

Alessio Cimmino Anna Andolfi Maria Chiara Zonno Angela Boari Ciro Troise

Phomentrioloxin is a phytotoxic geranylcyclohexenetriol produced in liquid culture by Phomopsis sp. (teleomorph: Diaporthe gulyae), a potential mycoherbicide proposed for the control of the annual weed Carthamus lanatus. In this study, seven derivatives obtained by chemical modifications of the toxin were assayed for phytotoxic, antimicrobial, and zootoxic activities, and the structure-activity relationships were examined. Each compound was tested on nonhost weedy and agrarian plants, fungi, Gram+ and Gram- bacteria, and on brine shrimp larvae. The results provide insights into an investigation of the structural requirements for activity. The hydroxy groups at C-2 and C-4 appeared to be important features for the phytotoxicity, as well as an unchanged cyclohexentriol ring. A role seemed also to be played by the unsaturations of the geranyl side chain. These findings could be useful for understanding the mechanisms of action of new natural products, for identifying the active sites, and possibly in devising new herbicides of natural origin.

Phytotoxin

Phytotoxicity

Brine shrimp

Achene

10.1021/jf4030618

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Citations (22)

Sataus and future for biological control of aquatic weeds of rice in Australia

Gavin Ash Eric Cother Farzad Jahromi Wayne Pitt V. Lanoiselet

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Bacteria associated with sheath browning and grain discoloration of rice in East Timor and implications for Australia’s biosecurity

Australasian Plant Disease Notes (2013)

Dante Adorada Benjamin J. Stodart Roni P. Tpoi Severino S. Costa Gavin Ash

Biosecurity

10.1007/s13314-013-0092-z

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Citations (9)

The science, art and business of successful bioherbicides

Biological Control (2009)

Gavin Ash

Bioherbicide

Identification

Isolation

10.1016/j.biocontrol.2009.08.007

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Citations (95)

Localisation of Loci Involved in Resistance to Diaporthe toxica and Pleiochaeta setosa in White Lupin (Lupinus albus L.)

Open Journal of Genetics (2014)

Rosy Raman Cina Ann Vipin David J. Luckett Raymond B. Cowley Gavin Ash

L. albus is an annual grain-legume crop mainly grown for high-protein fodder worldwide but also to produce large seeds for human consumption as a snack-food. In order to make genetic gains in grain yield, assessment of the genetic variation in the germplasm and identification of loci associated with agronomic traits are essential. Phomopsis blight (PB) and Pleiochaeta root rot (PRR), caused by the fungal pathogens Diaporthe toxica and, Pleiochaeta setosa respectively, are two major yield-limiting diseases of the L. albus crop. The extent of genetic diversity in 94 accessions of L. albus comprising: Australian and exotic cultivars, advanced breeding lines, and landraces originating from 26 different countries was determined utilizing PCR-based genic, and microarray-based Diversity Arrays Technology (DArT™), markers. All accessions were evaluated for resistance to PB in two plant tissues (leaves and stems) using either sprayed or injected spore inoculum. A subset of 58 accessions was further evaluated for resistance to PRR by growing seedlings in spore-infested potting mix. The combined data of 724 (50 genic- and 674 DArT) markers were used for cluster analysis. A subset of 324 markers with call rate ≥95% and predicted disease scores of different genotypes were used to identify marker loci accounting for phenotypic variation in PB and PRR resistance using linear regression analysis. Several markers showed significant association with PB or PRR resistance at P

Germ plasm

10.4236/ojgen.2014.43022

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Citations (3)

Standardizing resistance screening to Pseudomonas fuscovaginae and evaluation of rice germplasm at seedling and adult plant growth stages

Euphytica (2012)

Dante Adorada Benjamin J. Stodart Casiana Vera Cruz Glenn B. Gregorio Ireneo B. Pangga

Germ plasm

Panicle

10.1007/s10681-012-0804-z

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Citations (13)