Accumulation of hydroxamic acids during wheat germination

Copaja, Sylvia V.; Nicol, D.; Wratten, Stephen D.

doi:10.1016/s0031-9422(98)00479-8

Cited by 55 publications

(63 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…CO2 and soil water affected aphid population size partly through their effects on plant nutri ents. DIMBOA (cyclic hydroxamate) is one of the plant flavonoids and its aphid resistance role has attracted some attention (Argandona et al, 1980(Argandona et al, , 1981Copaja et al, 1999). We found that aphid population size was nega tively correlated with the foliar DIMBOA content under the 60%, 40% FWC and 700 ppm CO2 treatments.…”

Section: Discussionmentioning

confidence: 87%

Effects of different atmospheric CO2 concentrations and soil moistures on the populations of bird cherry-oat aphid (Rhopalosiphum padi) feeding on spring wheat

Zhang¹,

Xing²,

Liao³

et al. 2003

Eur. J. Entomol.

View full text Add to dashboard Cite

Abstract. Spring wheat plants were grown in pots at three CO2 concentrations (350, 550 and 700 ppm) and three soil water levels (40, 60 and 80% of field water capacity) in field open top chambers and were infested with bird cherry-oat aphids (Rhopalosiphum padi Linnaeus). Aphid population dynamics were recorded throughout the growing season and analysis of the chemical composition of spring wheat leaves was conducted at the same time. Results showed that: (1) Aphid populations increased with raised atmos pheric CO2 concentrations. (2) The aphid populations showed different responses to different CO2 concentrations. The population size, population growth rate and population density found under the 350 ppm CO2 treatment was far less than those recorded under the 550 and 700 ppm CO2 treatments. The population size, population growth rate and population density recorded under the 700 ppm CO2 treatment was slightly higher than those recorded under the 550 ppm CO2 treatment. (3) The effect of CO2 concentration on the aphid population was correlated with soil water level. The highest aphid population size was achieved under the 60% soil water treatment. (4) Atmospheric CO2 and soil moisture had significant effects on the chemical composition of the wheat leaves. (5) Aphid population size correlated positively with the concentration of leaf water content, soluble proteins, soluble carbohydrates and starch, while correlating negatively with the concentration of DIMBOA and tannin.

show abstract

Section: Discussionmentioning

confidence: 87%

Effects of different atmospheric CO2 concentrations and soil moistures on the populations of bird cherry-oat aphid (Rhopalosiphum padi) feeding on spring wheat

Zhang¹,

Xing²,

Liao³

et al. 2003

Eur. J. Entomol.

View full text Add to dashboard Cite

show abstract

“…Significant contributors to variation in benzoxazinoid levels are seasonal variability , the wheat cultivar, growth stage and plant age (Villagrasa et al, 2006), plant growth rate (Copaja et al, 1999), water stress, insect herbivory (Silva et al, 2006), light intensity (Ahman & Johansson, 1994), jasmonic acid signalling (Oikawa et al, 2001), and the presence of competitive weeds (Hasegawa et al, 2010).…”

Section: The Plant Tissue Concentrations Of Benzoxazinoidsmentioning

confidence: 99%

“…Levels of benzoxazolinones have been reported to be greater than 0.5 g Kg -1 in wheat shoots (Tang et al, 1975), and benzoxazinones concentrations in excess of 1.2 g Kg -1 were found in wheat root tissue (Copaja et al, 1999) and the entire plant (Krogh et al, 2006). Root tissue has the highest concentration of benzoxazolinones (Copaja et al, 1999), however root exudation of benzoxazolinones was shown to be cultivar specific (Wu et al, 2001). A ratio of 1:6 between the benzoxazolinones, BOA and MBOA respectively, in fresh tissue has been reported (Prinz et al, 2010).…”

Section: The Plant Tissue Concentrations Of Benzoxazinoidsmentioning

confidence: 99%

Degradation of the benzoxazolinone class of phytoalexins by Fusarium pseudograminearum, a pathogenic fungus of wheat

Kettle¹

View full text Add to dashboard Cite

The benzoxazolinone class of phytoalexins are released by wheat, maize and rye upon pathogen attack. Benzoxazolinones have antimicrobial activity, but certain fungi have evolved mechanisms to actively detoxify these compounds, which may contribute to the virulence of these pathogens. In many Fusarium spp. a cluster of genes is thought to be involved in the detoxification of benzoxazolinones. However, only one enzyme, Fusarium Detoxification of Benzoxazolinone 2 (Fdb2), encoded in the cluster has been unequi vocally assigned a role in this process. The FDB2 gene encodes a N-malonyltransferase and was identified in the maize pathogen F. verticillioides. In this thesis, through comparative genome analysis of several Fusarium species, a conserved genomic region has been identified around FDB2. Expression analyses demonstrated that a cluster of nine genes were responsive to exogenous benzoxazolinone in the important wheat pathogen Fusarium pseudograminearum.

show abstract

“…They are involved in plant defence against pests and diseases, and are thought to be primarily responsible for allelopathic weed suppression in rye and wheat (Niemeyer and Perez, 1995;Copaja et al, 1999;Wu et al, 2000;Sicker and Schulz, 2002). Friebe et al (1997) investigated the sensitivity of plasma membrane H + -ATPase from roots of Avena sativa to four benzoxazinoids (DIBOA, DIMBOA, MBOA, and BOA).…”

Section: (I) Biological Activity Of Multiple Allelochemicalsmentioning

confidence: 99%

Whole-Range Assessment: A Simple Method for Analysing Allelopathic Dose-Response Data

Pratley

Haig

et al. 2005

Nonlinearity in Biology, Toxicology, Medicine

View full text Add to dashboard Cite

show abstract

Accumulation of hydroxamic acids during wheat germination

Cited by 55 publications

References 29 publications

Effects of different atmospheric CO2 concentrations and soil moistures on the populations of bird cherry-oat aphid (Rhopalosiphum padi) feeding on spring wheat

Effects of different atmospheric CO2 concentrations and soil moistures on the populations of bird cherry-oat aphid (Rhopalosiphum padi) feeding on spring wheat

Degradation of the benzoxazolinone class of phytoalexins by Fusarium pseudograminearum, a pathogenic fungus of wheat

Whole-Range Assessment: A Simple Method for Analysing Allelopathic Dose-Response Data

Contact Info

Product

Resources

About