Consequences of mite feeding injury to beans on the fecundity and survivorship of the two-spotted spider mite (Acari: Tetranychidae)

English-Loeb, Greg; Karban, Richard

doi:10.1007/bf01246085

Cited by 13 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, no such alternative defense strategy has yet been described for lima bean. In its close relative, P. vulgaris , English-Loeb and Karban ( 1991 ) did not find evidence for induced direct resistance to spider mites. However, the protective effect of a direct defense, which in our long-term experiment could have been induced after JA application, cannot be excluded.…”

Section: Discussionmentioning

confidence: 94%

The Defensive Role of Volatile Emission and Extrafloral Nectar Secretion for Lima Bean in Nature

Kost

Heil

2007

J Chem Ecol

View full text Add to dashboard Cite

Lima bean (Phaseolus lunatus) features two indirect anti-herbivore defenses-emission of volatile organic compounds (VOCs) and secretion of extrafloral nectar (EFN)-which are both inducible upon herbivore damage. In a previous field study, Lima bean benefited from the simultaneous induction of the two defenses, yet it remained unclear whether both had contributed to plant protection. Our experimental approach aimed at studying the defensive role of both indirect defenses simultaneously. Tendrils were sprayed with jasmonic acid (JA) to induce both defenses, and performance was compared to that of others that were treated with a synthetic blend of either EFN or VOCs. Confirming earlier results, JA treatment and application of the VOC mixture induced EFN secretion in treated tendrils in quantitatively similar amounts. The composition of the applied synthetic blend of EFN was adjusted to match the concentration of EFN secreted from JA-and VOC-treated tendrils. Repeated application of either enhanced the performance of several fitness-relevant plant parameters such as growth rate and flower production. Tendrils treated with JA showed a similar trend, yet some fitness-related parameters responded less to this treatment. This suggests a minor importance of any putative JAdependent direct defense traits or higher costs of JA-elicited responses as compared to VOCS and EFN, as otherwise JA-treated tendrils should have outperformed VOC-and EFN-treated tendrils. Moreover, the beneficial effect of applying synthetic EFN alone equaled or exceeded that of VOCs and JA. Ants were by far the dominant group among the arthropods that was attracted to JA-, VOC-, or EFNtreated tendrils. The results suggest that EFN plays a more important role as an indirect defense of lima bean than VOCs or any other JA-responsive trait.

show abstract

Section: Discussionmentioning

confidence: 94%

The Defensive Role of Volatile Emission and Extrafloral Nectar Secretion for Lima Bean in Nature

Kost

Heil

2007

J Chem Ecol

View full text Add to dashboard Cite

show abstract

“…Although induced susceptibility without induced resistance has been observed in a variety of systems (e.g., Kielkiewicz 1988;English-Loeb and Karban 1991;Strauss 1991;Karban and Baldwin 1997), most previous experimental studies of the time course of induced resistance stopped when resistance returned to constitutive levels (e.g., Green and Ryan 1972;Baldwin 1988;McCloud et al 1995;Zangerl and Berenbaum 1995) ± too soon to know whether induced susceptibility would have followed resistance. Only one other study to date has reported susceptibility following resistance (Roland and Myers 1987;and see Seldal et al 1994).…”

Section: Discussionmentioning

confidence: 98%

The timing of induced resistance and induced susceptibility in the soybean-Mexican bean beetle system

Underwood

1998

Oecologia

View full text Add to dashboard Cite

Induced plant responses to herbivory have been demonstrated in many systems. It has been suggested that the timing of these responses may influence the impact of induced resistance on herbivore populations, and may affect the evolution of induced defenses. This study used a bioassay to characterize the time course of systemic induced responses to Mexican bean beetle herbivory in four genotypes of soybeans. The results suggest that the time course of induced responses in this system is more complex than most previous studies have indicated. Herbivory provoked both rapid induced resistance and subsequent induced susceptibility to beetle feeding. All four genotypes of soybean induced significant resistance to beetle damage (beetles preferred undamaged to damaged plants) by 3 days after damage. By 15 days after damage, this resistance had decayed (beetles showed no preference for undamaged over damaged plants), and by 20 days after damage, all four genotypes exhibited significant induced susceptibility (beetles preferred previously damaged plants over undamaged plants). The magnitude of induced resistance in each genotype correlated strongly with the magnitude of induced susceptibility in that genotype.

show abstract

“…Direct chemical defences are often induced via the octadecanoid pathway (Karban & Baldwin 1997) and can significantly benefit plants under natural growing conditions (Agrawal 1998; Baldwin 1998). A study on Phaseolus vulgaris found no evidence for induced direct resistance to spider mites (English‐Loeb & Karban 1991) but, although such direct defences have not yet been described in Lima bean, they might have played a role. The natural history behind the observed defensive effects, e.g.…”

Section: Discussionmentioning

confidence: 99%

Induction of two indirect defences benefits Lima bean (Phaseolus lunatus, Fabaceae) in nature

2004

View full text Add to dashboard Cite

Summary1 Herbivore damage often induces the release of herbivore-induced plant volatiles (HIPVs) or the secretion of extrafloral nectar (EFN). The purpose of this study was to induce such proposed indirect defence responses in plants growing in their natural environment and to monitor the effects on vegetative and generative traits such as herbivory, plant growth and fruit set. 2 I tested whether mature wild Lima beans ( Phaseolus lunatus , Fabaceae) growing in Mexico could be reliably induced to produce HIPVs and EFN in response to application of the phytohormone, jasmonic acid (JA), and investigated whether this treatment leads to any benefit to the plants. 3 Eleven HIPVs were released from JA-treated leaves at significantly higher amounts than from control leaves, and only one (methylsalicylate) at significantly lower amounts than from controls. Treatment with JA increased EFN secretion on leaves on average by more than 30 times and on bracts by more than 20 times. EFN production, which has not previously been described in Lima bean, represents a second induced indirect resistance trait of this species. 4 JA treatment reduced both the number of dead shoot tips and leaf damage by herbivores. Treated tendrils grew faster and produced more leaves than controls. At the end of the experiment, treated tendrils bore c . two times more inflorescences and three times more fruits than controls. 5 Repeated treatment with JA resulted in a combined induction of HIPVs and EFN and strongly benefited wild Lima beans. The plants suffered less from the consequences of herbivore attack, supporting the use of the term 'induced defences' for these traits. JA-induced defences thus can significantly benefit Lima bean under natural conditions.

show abstract

Consequences of mite feeding injury to beans on the fecundity and survivorship of the two-spotted spider mite (Acari: Tetranychidae)

Cited by 13 publications

References 25 publications

The Defensive Role of Volatile Emission and Extrafloral Nectar Secretion for Lima Bean in Nature

The Defensive Role of Volatile Emission and Extrafloral Nectar Secretion for Lima Bean in Nature

The timing of induced resistance and induced susceptibility in the soybean-Mexican bean beetle system

Induction of two indirect defences benefits Lima bean (Phaseolus lunatus, Fabaceae) in nature

Contact Info

Product

Resources

About