Susceptibility of Cultivars to Biotic Stresses

Iannotta, N.; Scalercio, Stefano

doi:10.5772/52036

Cited by 10 publications

(10 citation statements)

References 38 publications

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“…This result was also confirmed in fruits of the cultivar Coratina, where ethylene increased approximately 10 fold in infested fruits (Figure B). Coratina is considered a more susceptible variety to olive fly attack compared with Leccino (Iannotta and Scalercio ), and based on these results, increased susceptibility may be associated with differences in the ethylene induction levels (see Discussion).…”

Section: Resultsmentioning

confidence: 97%

Olive fruits infested with olive fly larvae respond with an ethylene burst and the emission of specific volatiles

Alagna

Kallenbach

Pompa

et al. 2015

JIPB

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Olive fly (Bactrocera oleae R.) is the most harmful insect pest of olive (Olea europaea L.) which strongly affects fruits and oil production. Despite the expanding economic importance of olive cultivation, up to now, only limited information on plant responses to B. oleae is available. Here, we demonstrate that olive fruits respond to B. oleae attack by producing changes in an array of different defensive compounds including phytohormones, volatile organic compounds (VOCs), and defense proteins. Bactrocera oleaeinfested fruits induced a strong ethylene burst and transcript levels of several putative ethylene-responsive transcription factors became significantly upregulated. Moreover, infested fruits induced significant changes in the levels of 12-oxophytodienoic acid and C 12 derivatives of the hydroperoxide lyase. The emission of VOCs was also changed quantitatively and qualitatively in insect-damaged fruits, indicating that B. oleae larval feeding can specifically affect the volatile blend of fruits. Finally, we show that larval infestation maintained high levels of trypsin protease inhibitors in ripe fruits, probably by affecting post-transcriptional mechanisms. Our results provide novel and important information to understand the response of the olive fruit to B. oleae attack; information that can shed light onto potential new strategies to combat this pest.

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Section: Resultsmentioning

confidence: 97%

Olive fruits infested with olive fly larvae respond with an ethylene burst and the emission of specific volatiles

Alagna

Kallenbach

Pompa

et al. 2015

JIPB

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show abstract

“…oleae [ 14 , 15 , 37 ]. Beta-glucosidases promote the formation of toxic glutaraldehyde-like structure from oleuropein, a phenolic compound that has been linked to the different susceptibility of olive cultivars [ 16 ]. DEGs were also involved in the production or response to phytohormones and molecules involved in pest response (e.g., jasmonic acid and ROS).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Olive varieties can have different levels of tolerance to the olive fruit fly [ 4 , 16 ]. In a comparison of different cultivars, the percentage of infestation ranged from less than 10% to up to 31% [ 16 ]. This difference is significant because a percentage of exit holes lower than 10% is compatible with a production of high quality olive oil in absence of chemical control methods, if adequate harvesting and storing procedures are followed [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…This difference is significant because a percentage of exit holes lower than 10% is compatible with a production of high quality olive oil in absence of chemical control methods, if adequate harvesting and storing procedures are followed [ 7 ]. A different tolerance to the olive fruit fly is evident not only comparing cultivars of different origins but also analysing regional germplasm [ 16 , 17 ]. For instance, among the twenty varieties that constitute the olive germplasm of the Campania region (Southern Italy) [ 18 ], the ‘Ortice’ and ‘Ruveia’ are reported to be highly susceptible and tolerant, respectively [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

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The transcriptional response to the olive fruit fly (Bactrocera oleae) reveals extended differences between tolerant and susceptible olive (Olea europaea L.) varieties

et al. 2017

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The olive fruit fly Bactrocera oleae (Diptera: Tephritidae) is the most devastating pest of cultivated olive (Olea europaea L.). Intraspecific variation in plant resistance to B. oleae has been described only at phenotypic level. In this work, we used a transcriptomic approach to study the molecular response to the olive fruit fly in two olive cultivars with contrasting level of susceptibility. Using next-generation pyrosequencing, we first generated a catalogue of more than 80,000 sequences expressed in drupes from approximately 700k reads. The assembled sequences were used to develop a microarray layout with over 60,000 olive-specific probes. The differential gene expression analysis between infested (i.e. with II or III instar larvae) and control drupes indicated a significant intraspecific variation between the more tolerant and susceptible cultivar. Around 2500 genes were differentially regulated in infested drupes of the tolerant variety. The GO annotation of the differentially expressed genes implies that the inducible resistance to the olive fruit fly involves a number of biological functions, cellular processes and metabolic pathways, including those with a known role in defence, oxidative stress responses, cellular structure, hormone signalling, and primary and secondary metabolism. The difference in the induced transcriptional changes between the cultivars suggests a strong genetic role in the olive inducible defence, which can ultimately lead to the discovery of factors associated with a higher level of tolerance to B. oleae.

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Genetic Control of Bactrocera oleae Gmelin (Diptera: Tephritidae) for Climate Change Mitigation

Nacimi,

Hmouni,

Ouguas

2024

Springer Climate

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Susceptibility of Cultivars to Biotic Stresses

Cited by 10 publications

References 38 publications

Olive fruits infested with olive fly larvae respond with an ethylene burst and the emission of specific volatiles

Olive fruits infested with olive fly larvae respond with an ethylene burst and the emission of specific volatiles

The transcriptional response to the olive fruit fly (Bactrocera oleae) reveals extended differences between tolerant and susceptible olive (Olea europaea L.) varieties

Genetic Control of Bactrocera oleae Gmelin (Diptera: Tephritidae) for Climate Change Mitigation

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