| Title: | Drought stress promotes the colonization success of a herbivorous mite that manipulates plant defenses |
| Author(s): | Ximenez-Embun MG; Glas JJ; Ortego F; Alba JM; Castanera P; Kant MR; |
| Address: | "Department of Environmental Biology, Centro de Investigaciones Biologicas, CSIC, Madrid, Spain. mgxe@cib.csic.es. Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands. Department of Environmental Biology, Centro de Investigaciones Biologicas, CSIC, Madrid, Spain" |
| DOI: | 10.1007/s10493-017-0200-4 |
| ISSN/ISBN: | 1572-9702 (Electronic) 0168-8162 (Print) 0168-8162 (Linking) |
| Abstract: | "Climate change is expected to bring longer periods of drought and this may affect the plant's ability to resist pests. We assessed if water deficit affects the tomato russet mite (TRM; Aculops lycopersici), a key tomato-pest. TRM thrives on tomato by suppressing the plant's jamonate defenses while these defenses typically are modulated by drought stress. We observed that the TRM population grows faster and causes more damage on drought-stressed plants. To explain this observation we measured several nutrients, phytohormones, defense-gene expression and the activity of defensive proteins in plants with or without drought stress or TRM. TRM increased the levels of total protein and several free amino acids. It also promoted the SA-response and upregulated the accumulation of jasmonates but down-regulated the downstream marker genes while promoting the activity of cysteine-but not serine-protease inhibitors, polyphenol oxidase and of peroxidase (POD). Drought stress, in turn, retained the down regulation of JA-marker genes and reduced the activity of serine protease inhibitors and POD, and altered the levels of some free-amino acids. When combined, drought stress antagonized the accumulation of POD and JA by TRM and synergized accumulation of free sugars and SA. Our data show that drought stress interacts with pest-induced primary and secondary metabolic changes and promotes pest performance" |
| Keywords: | "Animals *Droughts *Food Chain Herbivory Solanum lycopersicum/*chemistry/*physiology Mites/*physiology Population Dynamics Stress, Physiological Abiotic stress Aculops lycopersici Climate change Hormones Intermediary metabolism Tomato russet mite;" |
| Notes: | "MedlineXimenez-Embun, Miguel G Glas, Joris J Ortego, Felix Alba, Juan M Castanera, Pedro Kant, Merijn R eng Jae-Predoc_2011_00631/CSIC/ 20146754/CSIC/ GENOMITE 618105 FACCE Era Net Plus/INIA/ ALW-Meer Met Minder/847.13.005/NWO-ALW/ Netherlands 2017/12/01 Exp Appl Acarol. 2017 Dec; 73(3-4):297-315. doi: 10.1007/s10493-017-0200-4. Epub 2017 Nov 29" |
