Application of discriminant analysis to electrical penetration graphs of the aphid <i>Sitobion avenae</i> feeding on resistant and susceptible wheat

Caillaud, C. M.; Pietro, J. P. di; Chaubet, Bernard; Pierre, Jean‐Sébastien

doi:10.1111/j.1439-0418.1995.tb01252.x

Cited by 38 publications

(29 citation statements)

References 12 publications

(4 reference statements)

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“…Moreover, on leaves previously infested by heterospecific aphids, the number of probes and total duration of the pathway increased significantly. These are typical features of the behaviour of aphids feeding on resistant plants, as reported in EPG studies on aphid/plant systems (Campbell et al, 1982;van Helden & Tjallingii, 1993;Cole, 1994;Caillaud et al, 1995;Klingler et al, 1998;Ramirez & Niemeyer, 1999;Sauge et al, 2002). The modifications observed in the feeding behaviour of M. persicae tested on healthy leaves of previously infested potato plants led us to hypothesize that a mechanism of systemic resistance is induced by M. persicae and Ma.…”

Section: Discussionmentioning

confidence: 95%

Local and systemic responses induced by aphids in Solanum tuberosum plants

Dugravot

Brunissen

Létocart

et al. 2007

Entomologia Exp Applicata

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The aphids Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) (Homoptera: Aphididae) are serious pests of potato ( Solanum tuberosum L.) (Solanaceae), notably in transmitting several plant viruses. Heterospecific interactions may occur between these two species as they are often seen at the same time on the same potato plant in the field. As aphid infestation is known to induce both local and systemic changes, we conducted experiments to determine the effect of previous infestation on probing behaviour and feeding-related parameters. We used the DC electrical penetration graph technique to characterize the influence of previous infestation by conspecific M. persicae or by heterospecific Ma. euphorbiae on M. persicae feeding behaviour at both local and systemic levels, i.e., on previously infested leaves and on non-previously infested leaves of infested plants, respectively. Conspecific and heterospecific infestation led to similar modification of M. persicae feeding activities. However, the effects of previous infestation occurring at the local level were opposite to those observed at the systemic level. Myzus persicae food acceptance was slightly enhanced on previously infested leaves, whereas it was inhibited on non-infested leaves of infested plants, which indicated an induced resistance mechanism. Our results advance the understanding of the mechanisms involved in aphid-host plant acceptance and colonization processes on potato plants in conspecific and heterospecific situations.

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Section: Discussionmentioning

confidence: 95%

Local and systemic responses induced by aphids in Solanum tuberosum plants

Dugravot

Brunissen

Létocart

et al. 2007

Entomologia Exp Applicata

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“…susceptible/resistant) status, assessed in previous experiments [14,21]: Arminda is a very favourable T. aestivum cultivar (susceptible; S 1); Tm47 is the only favourable line of T. monococcum that has been described ($2); Tm46 and Tin44 are two unfavourable T. monococcum lines in which resistance mechanisms are different (resistant; respectively R1 and R2) [22]. Seedlings were used in the one-or twoqeaf stage, i.e.…”

Section: Methodsmentioning

confidence: 99%

Possible involvement of the phloem sealing system in the acceptance of a plant as host by an aphid

Caillaud

Niemeyer

1996

Experientia

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Abstract. Possible reasons for the rejection of some lines of Triticum monococcum (Tm44 and Tm46) by the aphid Sitobion avenae were explored. In all T. monococcum lines studied, whether unfavourable (non-host/resistant plant) or favourable (host/susceptible plant), the concentrations of hydroxamic acids, a family of aphid-resistance factors in cereals, were significantly lower than the levels in the favourable host-plant Triticum aestivum cv. Therefore, hydroxamic acids did not account for the host/non-host patterns observed. Phloem sap was collected by stylectomy from young seedlings of favourable and unfavourable plants. In non-aphid-resistant genotypes, the success in stylectomy, the proportion of amputated stylets resulting in long (> 1 rain) exudations, the average duration of exudation, and the final volume of sap exuded, were higher than in the aphid-resistant genotypes. It is concluded that aphid interference with the phloem sealing system of the plant is a likely mechanism of rejection of T. monococcum lines Tin44 and Tm46 as hosts by S. avenae.

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“…As aphid stylets are inserted within plant tissues during feeding, the information provided by direct observations is limited, whereas the Direct Current Electrical Penetration Graph (DC-EPG technique) gives information about the behaviour and the stylet tip position of the aphid during plant penetration (Tjallingii, 1978(Tjallingii, , 1988. susceptible versus resistant plants) are compared using either non-parametrically statistical tests or analysis of variance or multivariate methods (Caillaud et al, 1994). Nevertheless, data from EPG experiments are usually analyzed using nondynamic methods: a number of parameters are evaluated on each electrical recording (e.g.…”

Section: Introductionmentioning

confidence: 99%

Analysis of wheat resistance to the cereal aphidSitobion avenaeusing electrical penetration graphs and flow charts combined with correspondence analysis

Caillaud¹,

Pierre

Chaubet³

et al. 1995

Entomologia Exp Applicata

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The behaviour of Sitobion avenae (F.) was compared on resistant wheat lines of Triticum monococcum (L.) and a susceptible variety of Triticum aestivum (L.). Firstly, stylet penetration activities were monitored with the Electrical Penetration Graph (EPG) technique and subsequently analysed using flow charts combined with correspondence analysis. Plant resistance was shown to be associated with repeated penetrations without access to either the xylem or the phloem, and with numerous failures in starting a sustained sap ingestion (as represented by pattern E2). Access to sieve elements of the phloem did not seem to be much affected on resistant plants but it took the aphid three times as long to produce a sap ingestion pattern when maintained on the resistant line T. monococcum n o 44 (Tm44) as compared with aphids maintained on susceptible plants. As a result the total time spent in ingesting from sieve elements was reduced by 72% on Tm44. Secondly, direct observations of freely-moving apterous adults were performed. Aphids did not discriminate between resistant and susceptible wheat during the first 30 min of access to test leaves, but only 4 out of 25 aphids were still probing after eight hours on resistant Tm44.The relevance of these results to possible location of the resistance factor(s) are discussed. Although detection of plant resistance before sieve elements are reached can not be rigorously excluded, the factors involved in T. monococcum resistance to S. avenae undoubtedly occur within the phloem vessels.

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Application of discriminant analysis to electrical penetration graphs of the aphid Sitobion avenae feeding on resistant and susceptible wheat

Cited by 38 publications

References 12 publications

Local and systemic responses induced by aphids in Solanum tuberosum plants

Local and systemic responses induced by aphids in Solanum tuberosum plants

Possible involvement of the phloem sealing system in the acceptance of a plant as host by an aphid

Analysis of wheat resistance to the cereal aphidSitobion avenaeusing electrical penetration graphs and flow charts combined with correspondence analysis

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