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Physiological responses in genetically modified cotton and its isohybrid attacked by Aphis gossypii Glover (Hemiptera: Aphididae)

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Abstract

In Brazil, genetically modified cotton is increasing in most cultivated areas to manage insects, mainly Lepidoptera. Pests associated with cotton crops are diverse. Aphis gossypii Glover, 1877 (Hemiptera: Aphididae), one of the most important cotton pests, sucks photoassimilates from the phloem sap causing mold growth and damage to plant tissues. The interactions between Bt plants and non-target organisms and the impact of A. gossypii damage on these plants need further studies. Therefore, the objective was to evaluate the physiological stress caused by A. gossypii on Bt cotton and its isohybrid (same genetic background but not transgenic). The Bt cotton (Cotton Event 281-24-236/3006-210-23) and the isohybrid of this plant were planted in pots in a completely randomized design, as the treatments, with 30 replications in a greenhouse. The chlorophyll fluorescence parameters of the plants were evaluated by using a fluorometer. Regression models were adjusted for Bt cotton and the isohybrid, and the differences between treatments were evaluated through the model identity test. The photosynthetic parameters of Bt cotton and its isohybrid infested by this insect were similar.

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Fig. 1

Data availability

With the author Nermy Valadares—nermyrv@gmail.com.

Code availability

Not applicable.

Abbreviations

Bt:

Bacillus thuringiensis

FSII:

Photosystem II

Fv/Fm:

Variable and maximum fluorescence

Fo:

Initial fluorescence

Fm:

Maximum fluorescence

ETR:

Electron transport rate

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Acknowledgements

To the Brazilian agencies “Conselho Nacional de Desenvolvimento Cientifico e Tecnológico (CNPq)” and “Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)” for scholarships and financial support and all anonymous reviewers who contributed with suggestions for improving the research. This study was financed in part by the “Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES—Finance Code 001)”. Prof. Thomas Griggs of the University of Northern Colorado (USA) reviewed and edited this manuscript.

Funding

This study was supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES- Finance Code 001).

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Authors and Affiliations

Authors

Contributions

Conceptualization: NRV and MAS; methodology: NRV, MAS, EAF, VGMdS and JCZ; formal analysis: NRV, MAS, EAF, VGMdS, AMA and GLDL; investigation: NRV, MAS and EAF; resources: MAS, VGMdS and JCZ; supervision: MAS; project administration: MAS; funding acquisition,: MAS, VGMdS and JCZ; wrote the manuscript: NRV, MAS and JCZ. All authors have read and agreed to the published version of the manuscript.

Corresponding author

Correspondence to Marcus Alvarenga Soares.

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The authors declare that they have no conflict of interest.

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Handling Editor: Kerry Mauck.

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Valadares, N.R., Soares, M.A., Ferreira, E.A. et al. Physiological responses in genetically modified cotton and its isohybrid attacked by Aphis gossypii Glover (Hemiptera: Aphididae). Arthropod-Plant Interactions 17, 167–172 (2023). https://doi.org/10.1007/s11829-022-09943-8

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  • DOI: https://doi.org/10.1007/s11829-022-09943-8

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