Imaging of Leaf Water Patterns of <i>Vitis vinifera</i> Genotypes Infected by <i>Plasmopara viticola</i>
The water status of plants is affected by abiotic and biotic environmental factors and influences the growth and yield formation of crops. Assessment of the leaf water content (LWC) of grapevine using hyperspectral imaging (1000–2500 nm) was investigated under controlled conditions for its potential...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
|
| Series: | Remote Sensing |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-4292/17/10/1788 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849719663032795136 |
|---|---|
| author | Erich-Christian Oerke Ulrike Steiner |
| author_facet | Erich-Christian Oerke Ulrike Steiner |
| author_sort | Erich-Christian Oerke |
| collection | DOAJ |
| description | The water status of plants is affected by abiotic and biotic environmental factors and influences the growth and yield formation of crops. Assessment of the leaf water content (LWC) of grapevine using hyperspectral imaging (1000–2500 nm) was investigated under controlled conditions for its potential to study the effects of the downy mildew pathogen <i>Plasmopara viticola</i> on LWC of host tissue in compatible and incompatible interactions. A calibration curve was established for the relationship between LWC and the Normalized Difference Leaf Water Index (NDLWI<sub>1937</sub>) that uses spectral information from the water absorption band and NIR for normalization. LWC was significantly lower for abaxial than for adaxial leaf sides, irrespective of grapevine genotype and health status. Reflecting details of leaf anatomy, vascular tissue exhibited effects reverse to intercostal areas. Effects of <i>P. viticola</i> on LWC coincided with the appearance of first sporangia on the abaxial side and increased during further pathogenesis. Continuous water loss ultimately resulted in tissue death, which progressed from the margins into central leaf areas. Tiny spots of brown leaf tissue related to the reaction of partial resistant cultivars could be monitored only at the sensor’s highest spatial resolution. Proximal sensing enabled an unprecedented spatial resolution of leaf water content in host–pathogen interactions and confirmed that resistance reactions may produce a combination of dead and still-living cells that enable the development of biotrophic <i>P. viticola.</i> |
| format | Article |
| id | doaj-art-82fd1c1c5d2d49c297fb4c08f67f2f66 |
| institution | DOAJ |
| issn | 2072-4292 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj-art-82fd1c1c5d2d49c297fb4c08f67f2f662025-08-20T03:12:05ZengMDPI AGRemote Sensing2072-42922025-05-011710178810.3390/rs17101788Imaging of Leaf Water Patterns of <i>Vitis vinifera</i> Genotypes Infected by <i>Plasmopara viticola</i>Erich-Christian Oerke0Ulrike Steiner1INRES–Plant Pathology, Rheinische Friedrich-Wilhelms-Universitaet Bonn, Nussallee 9, D-53115 Bonn, GermanyINRES–Plant Pathology, Rheinische Friedrich-Wilhelms-Universitaet Bonn, Nussallee 9, D-53115 Bonn, GermanyThe water status of plants is affected by abiotic and biotic environmental factors and influences the growth and yield formation of crops. Assessment of the leaf water content (LWC) of grapevine using hyperspectral imaging (1000–2500 nm) was investigated under controlled conditions for its potential to study the effects of the downy mildew pathogen <i>Plasmopara viticola</i> on LWC of host tissue in compatible and incompatible interactions. A calibration curve was established for the relationship between LWC and the Normalized Difference Leaf Water Index (NDLWI<sub>1937</sub>) that uses spectral information from the water absorption band and NIR for normalization. LWC was significantly lower for abaxial than for adaxial leaf sides, irrespective of grapevine genotype and health status. Reflecting details of leaf anatomy, vascular tissue exhibited effects reverse to intercostal areas. Effects of <i>P. viticola</i> on LWC coincided with the appearance of first sporangia on the abaxial side and increased during further pathogenesis. Continuous water loss ultimately resulted in tissue death, which progressed from the margins into central leaf areas. Tiny spots of brown leaf tissue related to the reaction of partial resistant cultivars could be monitored only at the sensor’s highest spatial resolution. Proximal sensing enabled an unprecedented spatial resolution of leaf water content in host–pathogen interactions and confirmed that resistance reactions may produce a combination of dead and still-living cells that enable the development of biotrophic <i>P. viticola.</i>https://www.mdpi.com/2072-4292/17/10/1788downy mildewhyperspectral imagingleaf anatomyleaf morphologywater balance |
| spellingShingle | Erich-Christian Oerke Ulrike Steiner Imaging of Leaf Water Patterns of <i>Vitis vinifera</i> Genotypes Infected by <i>Plasmopara viticola</i> Remote Sensing downy mildew hyperspectral imaging leaf anatomy leaf morphology water balance |
| title | Imaging of Leaf Water Patterns of <i>Vitis vinifera</i> Genotypes Infected by <i>Plasmopara viticola</i> |
| title_full | Imaging of Leaf Water Patterns of <i>Vitis vinifera</i> Genotypes Infected by <i>Plasmopara viticola</i> |
| title_fullStr | Imaging of Leaf Water Patterns of <i>Vitis vinifera</i> Genotypes Infected by <i>Plasmopara viticola</i> |
| title_full_unstemmed | Imaging of Leaf Water Patterns of <i>Vitis vinifera</i> Genotypes Infected by <i>Plasmopara viticola</i> |
| title_short | Imaging of Leaf Water Patterns of <i>Vitis vinifera</i> Genotypes Infected by <i>Plasmopara viticola</i> |
| title_sort | imaging of leaf water patterns of i vitis vinifera i genotypes infected by i plasmopara viticola i |
| topic | downy mildew hyperspectral imaging leaf anatomy leaf morphology water balance |
| url | https://www.mdpi.com/2072-4292/17/10/1788 |
| work_keys_str_mv | AT erichchristianoerke imagingofleafwaterpatternsofivitisviniferaigenotypesinfectedbyiplasmoparaviticolai AT ulrikesteiner imagingofleafwaterpatternsofivitisviniferaigenotypesinfectedbyiplasmoparaviticolai |