This title appears in the Scientific Report :
2021
Detection of cold and salt stress responses in Capsicum by hyperspectral measurements
Detection of cold and salt stress responses in Capsicum by hyperspectral measurements
Suboptimal cultivation conditions like low temperature and high soil or irrigation salinity are limiting factors in horticultural production. Also in chilli and bell pepper production, cold and salt stress can lead to a considerable reduction of the fruit yield. It has been shown that hyperspectral...
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Personal Name(s): | Genzel, Franziska (Corresponding author) |
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Wiese-Klinkenberg, Anika (Collaboration author) | |
Contributing Institute: |
Bioinformatik; IBG-4 Pflanzenwissenschaften; IBG-2 |
Imprint: |
2021
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Conference: | Plant Biology Europe Congress, 2021, Turin (Italy), 2021-06-28 - 2021-07-01 |
Document Type: |
Poster |
Research Program: |
Biological and environmental resources for sustainable use |
Publikationsportal JuSER |
Suboptimal cultivation conditions like low temperature and high soil or irrigation salinity are limiting factors in horticultural production. Also in chilli and bell pepper production, cold and salt stress can lead to a considerable reduction of the fruit yield. It has been shown that hyperspectral measurements allow an early detection of plant stress responses, already before onset of visible stress symptoms. Leaf reflectances of a bell pepper and a chilli cultivar were strongly affected by cold stress with wavelengths around 558.5 nm and 699.2 nm being the most sensitive ones. Salt stress, however, had a much weaker effect on the leaf reflectance in both cultivars. Furthermore, the chilli cultivar showed a higher leaf reflectance sensitivity to the applied stresses than the bell pepper cultivar. This coincides with the stress-related growth reduction, which occurred stronger and earlier in the chilli than in the bell pepper cultivar. Selected reflectance indices were monitored throughout 14 days of stress treatment regarding their potential for an early detection of cold or salt stress responses. A clear, significant distinction between unstressed and cold-stressed plants could be already achieved after 4 days for chilli and after 11 days for the bell pepper cultivar through the RGI (red green index). The NDRE (normalized difference red edge index) was significantly decreased in leaves of plants treated with single cold and cold plus salt after 11 and 14 days in both cultivars. However, the selected reflectance indices allowed no distinct separation between unstressed and salt-stressed plants in either of the cultivars. Early detection of plant stress responses by hyperspectral leaf analyses can help to adjust bell pepper and chilli cultivation. Moreover, stress response quantification is a prerequisite for breeding crops with higher stress tolerance levels. |