| Title: | "Gas exchange, biomass and non-structural carbohydrates dynamics in vines under combined drought and biotic stress" |
| Author(s): | Savi T; Garcia Gonzalez A; Herrera JC; Forneck A; |
| Address: | "Department of Integrative Biology and Biodiversity Research, University of Natural Resources and Life Sciences, Vienna (BOKU), Institute of Botany, Gregor-Mendel-Strasse 33, 1190, Vienna, Austria. tadeja.savi@boku.ac.at. Department of Crop Sciences, University of Natural Resources and Life Sciences, Vienna (BOKU), Institute of Viticulture and Pomology, Konrad Lorenz Strasse 24, A-3430, Tulln, Austria. tadeja.savi@boku.ac.at. Department of Crop Sciences, University of Natural Resources and Life Sciences, Vienna (BOKU), Institute of Viticulture and Pomology, Konrad Lorenz Strasse 24, A-3430, Tulln, Austria" |
| DOI: | 10.1186/s12870-019-2017-2 |
| ISSN/ISBN: | 1471-2229 (Electronic) 1471-2229 (Linking) |
| Abstract: | "BACKGROUND: Intensity of drought stress and pest attacks is forecasted to increase in the near future posing a serious threat to natural and agricultural ecosystems. Knowledge on potential effects of a combined abiotic-biotic stress on whole-plant physiology is lacking. We monitored the water status and carbon metabolism of a vine rootstock with or without scion subjected to water shortening and/or infestation with the sucking insect phylloxera (Daktulosphaira vitifoliae Fitch). We measured non-structural carbohydrates and biomass of different plant organs to assess the stress-induced responses at the root, stem, and leaf level. Effects of watering on root infestation were also addressed. RESULTS: Higher root infestation was observed in drought-stressed plants compared to well-watered. The drought had a significant impact on most of the measured functional traits. Phylloxera further influenced vines water and carbon metabolism and enforced the sink strength of the roots by stimulating photosynthates translocation. The insect induced carbon depletion, reprogramed vine development, while preventing biomass compensation. A synergic effect of biotic-abiotic stress could be detected in several physiological and morphological traits. CONCLUSIONS: Our results indicate that events of water shortage favour insects' feeding damage and increase the abundance of root nodosities. Root phylloxera infestation imposes a considerable stress to the plants which might exacerbate the negative effects of drought" |
| Keywords: | "Animals Biomass *Droughts Herbivory Insecta/pathogenicity Plant Roots/parasitology/physiology Stress, Physiological/physiology Vitis/parasitology/*physiology Abiotic stress Phylloxera Riesling Vitis vinifera Water status;" |
| Notes: | "MedlineSavi, Tadeja Garcia Gonzalez, Almudena Herrera, Jose Carlos Forneck, Astrid eng England 2019/09/20 BMC Plant Biol. 2019 Sep 18; 19(1):408. doi: 10.1186/s12870-019-2017-2" |
