| Title: | Plant manipulation through gall formation constrains amino acid transporter evolution in sap-feeding insects |
| Address: | "Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA, 92521, USA. Department of Botany and Plant Sciences, University of California, Riverside, 900 University Avenue, Batchelor Hall room 2140, Riverside, CA, 92521, USA. pauln@ucr.edu" |
| DOI: | 10.1186/s12862-017-1000-5 |
| ISSN/ISBN: | 1471-2148 (Electronic) 1471-2148 (Linking) |
| Abstract: | "BACKGROUND: The herbivore lifestyle leads to encounters with plant toxins and requires mechanisms to overcome suboptimal nutrient availability in plant tissues. Although the evolution of bacterial endosymbiosis alleviated many of these challenges, the ability to manipulate plant nutrient status has evolved in lineages with and without nutritional symbionts. Whether and how these alternative nutrient acquisition strategies interact or constrain insect evolution is unknown. We studied the transcriptomes of galling and free-living aphidomorphs to characterize how amino acid transporter evolution is influenced by the ability to manipulate plant resource availability. RESULTS: Using a comparative approach we found phylloxerids retain nearly all amino acid transporters as other aphidomorphs, despite loss of nutritional endosymbiosis. Free living species show more transporters than galling species within the same genus, family, or infraorder, indicating plant hosts influence the maintenance and evolution of nutrient transport within herbivores. Transcript profiles also show lineage specificity and suggest some genes may facilitate life without endosymbionts or the galling lifestyle. CONCLUSIONS: The transcript abundance profiles we document across fluid feeding herbivores support plant host constraint on insect amino acid transporter evolution. Given amino acid uptake, transport, and catabolism underlie the success of herbivory as a life history strategy, this suggests that plant host nutrient quality, whether constitutive or induced, alters the selective environment surrounding the evolution and maintenance of endosymbiosis" |
| Keywords: | "Amino Acid Transport Systems/*genetics Animals Aphids/classification/*genetics/physiology *Evolution, Molecular Gene Expression Profiling *Herbivory Insect Proteins/*genetics Phylogeny Plant Physiological Phenomena Plant Tumors Symbiosis Aphid Effector En;" |
| Notes: | "MedlineZhao, Chaoyang Nabity, Paul D eng England 2017/06/29 BMC Evol Biol. 2017 Jun 27; 17(1):153. doi: 10.1186/s12862-017-1000-5" |
