Use of RGB vegetation indexes in assessing early effects of Verticillium Wilt of Olive in asymptomatic plants in high and low fertility scenarios
| Autor: | Jose A. Fernandez-Gallego, Jordi Bort, Joan Romanyà, Marc Sancho-Adamson, Maria Isabel Trillas |
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| Přispěvatelé: | Universitat de Barcelona |
| Předmět: |
0106 biological sciences
Mediterranean climate Stomatal conductance Verticillium dahliae biotrophic phase organic amendments olive mill waste compost plant nutrition Science Nutrició vegetal Fongs en l'agricultura Biology 01 natural sciences 03 medical and health sciences Plant nutrition Chlorophyll fluorescence 030304 developmental biology Fungi in agriculture 0303 health sciences Inoculation fungi food and beverages Vegetation biology.organism_classification Horticulture General Earth and Planetary Sciences Verticillium wilt 010606 plant biology & botany |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Remote Sensing, Vol 11, Iss 6, p 607 (2019) Dipòsit Digital de la UB Universidad de Barcelona Remote Sensing; Volume 11; Issue 6; Pages: 607 |
| Popis: | Verticillium Wilt of Olive, a disease caused by the hemibiotrophic vascular fungus Verticillium dahliae Kleb. presents one of the most important constraints to olive production in the world, with an especially notable impact in Mediterranean agriculture. This study evaluates the use of RGB vegetation indexes in assessing the effects of this disease during the biotrophic phase of host-pathogen interaction, in which symptoms of wilt are not yet evident. While no differences were detected by measuring stomatal conductance and chlorophyll fluorescence, results obtained from RGB indexes showed significant differences between control and inoculated plants for indexes Saturation, a*, b*, green Area (GA), normalized green-red difference index (NGRDI) and triangular greenness index (TGI), presenting a reduction in plant growth as well as in green and yellow color components as an effect of inoculation. These results were contrasted across two scenarios of mineral fertilization in soil and soil amended with two different olive mill waste composts, presenting a clear interaction between the host-pathogen relationship and plant nutrition and suggesting the effect of V. dahliae infection during the biotrophic phase was not related to plant water status. |
| Databáze: | OpenAIRE |
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