Molecular Evidence for the Fitness of Cotton Aphid, in Response to Elevated CO From the Perspective of Feeding Behavior Analysis

Overview

Journal Front Physiol

Date 2018 Nov 29

PMID 30483140

Citations 1

Authors

Shoulin Jiang

Yang Dai

Yongqing Lu

Shuqin Fan

Yanmin Liu

Muhammad Adnan Bodlah

Megha N Parajulee

Fajun Chen

Affiliations

Soon will be listed here.

Abstract

Rising atmospheric carbon dioxide (CO) concentration is likely to influence insect-plant interactions. Aphid, as a typical phloem-feeding herbivorous insect, has shown consistently more positive responses in fitness to elevated CO concentrations than those seen in leaf-chewing insects. But, little is known about the mechanism of this performance. In this study, the foliar soluble constituents of cotton and the life history of the cotton aphid and its mean relative growth rate (MRGR) and feeding behavior were measured, as well as the relative transcript levels of target genes related appetite, salivary proteins, molting hormone (MH), and juvenile hormone, to investigate the fitness of in response to elevated CO (800 ppm vs. 400 ppm). The results indicated that elevated CO significantly stimulated the increase in concentrations of soluble proteins in the leaf and sucrose in seedlings. Significant increases in adult longevity, lifespan, fecundity, and MRGR of were found under elevated CO in contrast to ambient CO. Furthermore, the feeding behavior of was significantly affected by elevated CO, including significant shortening of the time of stylet penetration to phloem position and significant decrease in the mean frequency of xylem phase. It is presumed that the fitness of can be enhanced, resulting from the increases in nutrient sources and potential increase in the duration of phloem ingestion under elevated CO in contrast to ambient CO. In addition, the qPCR results also demonstrated that the genes related to appetite and salivary proteins were significantly upregulated, whereas, the genes related to MH were significantly downregulated under elevated CO in contrast to ambient CO, this is in accordance with the performance of in response to elevated CO. In conclusion, rise in atmospheric CO concentration can enhance the fitness of by increasing their ingestion of higher quantity and higher quality of host plant tissues and by simultaneously upregulating the transcript expression of the genes related to appetite and salivary proteins, and then this may increase the control risk of under conditions of climate change in the future.

Citing Articles

Elevated Carbon Dioxide and Nitrogen Impact Wheat and Its Aphid Pest.

Carreras Navarro E, Lam S, Trebicki P Front Plant Sci. 2020; 11:605337.

PMID: 33335537 PMC: 7736075. DOI: 10.3389/fpls.2020.605337.

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