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Duplication and expression of horizontally transferred polygalacturonase genes is associated with host range expansion of mirid bugs

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Duplication and expression of horizontally transferred polygalacturonase genes is associated with host range expansion of mirid bugs. / Xu, P.; Lu, B.; Liu, J.; Chao, J.; Donkersley, P.; Holdbrook, R.; Lu, Y.

In: BMC Evolutionary Biology, Vol. 19, No. 1, 12, 09.01.2019.

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@article{5e1288b13c9b44368d1fe86094bfa68a,
title = "Duplication and expression of horizontally transferred polygalacturonase genes is associated with host range expansion of mirid bugs",
abstract = "Background: Horizontal gene transfer and gene duplication are two major mechanisms contributing to the evolutionary adaptation of organisms. Previously, polygalacturonase genes (PGs) were independently horizontally transferred and underwent multiple duplications in insects (e.g., mirid bugs and beetles). Here, we chose three phytozoophagous mirid bugs (Adelphocoris suturalis, A. fasciaticollis, A. lineolatus) and one zoophytophagous mirid bug (Nesidiocoris tenuis) to detect whether the duplication, molecular evolution, and expression levels of PGs were related to host range expansion in mirid bugs. Results: By RNA-seq, we reported 30, 20, 19 and 8 PGs in A. suturalis, A. fasciaticollis, A. lineolatus and N. tenuis, respectively. Interestingly, the number of PGs was significantly positive correlation to the number of host plants (P = 0.0339) in mirid bugs. Most PGs (> 17) were highly expressed in the three phytozoophagous mirid bugs, while only one PG was relatively highly expressed in the zoophytophagous mirid bug. Natural selection analysis clearly showed that a significant relaxation of selection pressure acted on the PGs in zoophytophagous mirid bugs (K = 0.546, P = 0.0158) rather than in phytozoophagous mirid bugs (K = 1, P = 0.92), suggesting a function constraint of PGs in phytozoophagous mirid bugs. Conclusion: Taken together with gene duplication, molecular evolution, and expression levels, our results suggest that PGs are more strictly required by phytozoophagous than by zoophytophagous mirid bugs and that the duplication of PGs is associated with the expansion of host plant ranges in mirid bugs. {\textcopyright} 2019 The Author(s).",
keywords = "Expression, Gene duplication, Host range expansion, Molecular evolution, Polygalacturonase, Adelphocoris suturalis, Coleoptera, Hexapoda, Miridae",
author = "P. Xu and B. Lu and J. Liu and J. Chao and P. Donkersley and R. Holdbrook and Y. Lu",
year = "2019",
month = jan,
day = "9",
doi = "10.1186/s12862-019-1351-1",
language = "English",
volume = "19",
journal = "BMC Evolutionary Biology",
issn = "1471-2148",
publisher = "BIOMED CENTRAL LTD",
number = "1",

}

RIS

TY - JOUR

T1 - Duplication and expression of horizontally transferred polygalacturonase genes is associated with host range expansion of mirid bugs

AU - Xu, P.

AU - Lu, B.

AU - Liu, J.

AU - Chao, J.

AU - Donkersley, P.

AU - Holdbrook, R.

AU - Lu, Y.

PY - 2019/1/9

Y1 - 2019/1/9

N2 - Background: Horizontal gene transfer and gene duplication are two major mechanisms contributing to the evolutionary adaptation of organisms. Previously, polygalacturonase genes (PGs) were independently horizontally transferred and underwent multiple duplications in insects (e.g., mirid bugs and beetles). Here, we chose three phytozoophagous mirid bugs (Adelphocoris suturalis, A. fasciaticollis, A. lineolatus) and one zoophytophagous mirid bug (Nesidiocoris tenuis) to detect whether the duplication, molecular evolution, and expression levels of PGs were related to host range expansion in mirid bugs. Results: By RNA-seq, we reported 30, 20, 19 and 8 PGs in A. suturalis, A. fasciaticollis, A. lineolatus and N. tenuis, respectively. Interestingly, the number of PGs was significantly positive correlation to the number of host plants (P = 0.0339) in mirid bugs. Most PGs (> 17) were highly expressed in the three phytozoophagous mirid bugs, while only one PG was relatively highly expressed in the zoophytophagous mirid bug. Natural selection analysis clearly showed that a significant relaxation of selection pressure acted on the PGs in zoophytophagous mirid bugs (K = 0.546, P = 0.0158) rather than in phytozoophagous mirid bugs (K = 1, P = 0.92), suggesting a function constraint of PGs in phytozoophagous mirid bugs. Conclusion: Taken together with gene duplication, molecular evolution, and expression levels, our results suggest that PGs are more strictly required by phytozoophagous than by zoophytophagous mirid bugs and that the duplication of PGs is associated with the expansion of host plant ranges in mirid bugs. © 2019 The Author(s).

AB - Background: Horizontal gene transfer and gene duplication are two major mechanisms contributing to the evolutionary adaptation of organisms. Previously, polygalacturonase genes (PGs) were independently horizontally transferred and underwent multiple duplications in insects (e.g., mirid bugs and beetles). Here, we chose three phytozoophagous mirid bugs (Adelphocoris suturalis, A. fasciaticollis, A. lineolatus) and one zoophytophagous mirid bug (Nesidiocoris tenuis) to detect whether the duplication, molecular evolution, and expression levels of PGs were related to host range expansion in mirid bugs. Results: By RNA-seq, we reported 30, 20, 19 and 8 PGs in A. suturalis, A. fasciaticollis, A. lineolatus and N. tenuis, respectively. Interestingly, the number of PGs was significantly positive correlation to the number of host plants (P = 0.0339) in mirid bugs. Most PGs (> 17) were highly expressed in the three phytozoophagous mirid bugs, while only one PG was relatively highly expressed in the zoophytophagous mirid bug. Natural selection analysis clearly showed that a significant relaxation of selection pressure acted on the PGs in zoophytophagous mirid bugs (K = 0.546, P = 0.0158) rather than in phytozoophagous mirid bugs (K = 1, P = 0.92), suggesting a function constraint of PGs in phytozoophagous mirid bugs. Conclusion: Taken together with gene duplication, molecular evolution, and expression levels, our results suggest that PGs are more strictly required by phytozoophagous than by zoophytophagous mirid bugs and that the duplication of PGs is associated with the expansion of host plant ranges in mirid bugs. © 2019 The Author(s).

KW - Expression

KW - Gene duplication

KW - Host range expansion

KW - Molecular evolution

KW - Polygalacturonase

KW - Adelphocoris suturalis

KW - Coleoptera

KW - Hexapoda

KW - Miridae

U2 - 10.1186/s12862-019-1351-1

DO - 10.1186/s12862-019-1351-1

M3 - Journal article

VL - 19

JO - BMC Evolutionary Biology

JF - BMC Evolutionary Biology

SN - 1471-2148

IS - 1

M1 - 12

ER -