Chlorophyll index, photochemical reflectance index and chlorophyll fluorescence measurements of rice leaves supplied with different N levels
Rapid and non-destructive diagnosis of plant N status is highly required in order to optimise N fertilizer management and use-efficiency. Additionally to handheld devices for measurements of chlorophyll indices (e.g., SPAD meter) parameters of canopy reflectance via remote sensing approaches are int...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2012
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/42078 |
| _version_ | 1855541150832656384 |
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| author | Shrestha, S. Brueck H Asch, F. |
| author_browse | Asch, F. Brueck H Shrestha, S. |
| author_facet | Shrestha, S. Brueck H Asch, F. |
| author_sort | Shrestha, S. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Rapid and non-destructive diagnosis of plant N status is highly required in order to optimise N fertilizer management and use-efficiency. Additionally to handheld devices for measurements of chlorophyll indices (e.g., SPAD meter) parameters of canopy reflectance via remote sensing approaches are intensively investigated and the photochemical reflectance index (PRI) appears to be a reliable indicator for changes of the epoxidation state of xanthophyll cycle pigments. In order to assess the suitability of a handheld PRI as an additional tool for N diagnosis, rice plants were grown in a nutrient solution experiment with seven N-supply levels (0.18 5.71 mM) and CI (SPAD) and PRI values and chlorophyll fluorescence parameters measured 20 and 28 days after onset of treatments. N-supply had effects on both CI (SPAD) and PRI values with a more reliable differentiation between levels. Maximum quantum yield of PSII (Fv/Fm), actual efficiency of PSII photochemistry (?PSII) and regulated non-photochemical quenching (?NPQ) did not differ significantly between N levels. Non-photochemical quenching (NPQ) and fast- relaxing NPQ (NPQF) were significantly affected by N-supply. NPQ and NPQF, but not the slow-relaxing component (NPQS), were correlated with CI (SPAD) and PRI values. This finding which has not been reported for N-supply effects so far is indirect evidence that low N-supply induced xanthophyll cycle activity and that PRI values are able to indicate this at least in plants subject to severe N deficiency. |
| format | Journal Article |
| id | CGSpace42078 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace420782023-12-08T19:36:04Z Chlorophyll index, photochemical reflectance index and chlorophyll fluorescence measurements of rice leaves supplied with different N levels Shrestha, S. Brueck H Asch, F. agriculture climate chlorophylls nitrogen nitrogen fertilizers Rapid and non-destructive diagnosis of plant N status is highly required in order to optimise N fertilizer management and use-efficiency. Additionally to handheld devices for measurements of chlorophyll indices (e.g., SPAD meter) parameters of canopy reflectance via remote sensing approaches are intensively investigated and the photochemical reflectance index (PRI) appears to be a reliable indicator for changes of the epoxidation state of xanthophyll cycle pigments. In order to assess the suitability of a handheld PRI as an additional tool for N diagnosis, rice plants were grown in a nutrient solution experiment with seven N-supply levels (0.18 5.71 mM) and CI (SPAD) and PRI values and chlorophyll fluorescence parameters measured 20 and 28 days after onset of treatments. N-supply had effects on both CI (SPAD) and PRI values with a more reliable differentiation between levels. Maximum quantum yield of PSII (Fv/Fm), actual efficiency of PSII photochemistry (?PSII) and regulated non-photochemical quenching (?NPQ) did not differ significantly between N levels. Non-photochemical quenching (NPQ) and fast- relaxing NPQ (NPQF) were significantly affected by N-supply. NPQ and NPQF, but not the slow-relaxing component (NPQS), were correlated with CI (SPAD) and PRI values. This finding which has not been reported for N-supply effects so far is indirect evidence that low N-supply induced xanthophyll cycle activity and that PRI values are able to indicate this at least in plants subject to severe N deficiency. 2012-08 2014-08-15T12:13:22Z 2014-08-15T12:13:22Z Journal Article https://hdl.handle.net/10568/42078 en Limited Access Elsevier Shrestha S, Brueck H, Asch F. 2012. Chlorophyll index, photochemical reflectance index and chlorophyll fluorescence measurements of rice leaves supplied with different N levels. Journal of Photochemistry and Photobiology B: Biology 113:7-13. |
| spellingShingle | agriculture climate chlorophylls nitrogen nitrogen fertilizers Shrestha, S. Brueck H Asch, F. Chlorophyll index, photochemical reflectance index and chlorophyll fluorescence measurements of rice leaves supplied with different N levels |
| title | Chlorophyll index, photochemical reflectance index and chlorophyll fluorescence measurements of rice leaves supplied with different N levels |
| title_full | Chlorophyll index, photochemical reflectance index and chlorophyll fluorescence measurements of rice leaves supplied with different N levels |
| title_fullStr | Chlorophyll index, photochemical reflectance index and chlorophyll fluorescence measurements of rice leaves supplied with different N levels |
| title_full_unstemmed | Chlorophyll index, photochemical reflectance index and chlorophyll fluorescence measurements of rice leaves supplied with different N levels |
| title_short | Chlorophyll index, photochemical reflectance index and chlorophyll fluorescence measurements of rice leaves supplied with different N levels |
| title_sort | chlorophyll index photochemical reflectance index and chlorophyll fluorescence measurements of rice leaves supplied with different n levels |
| topic | agriculture climate chlorophylls nitrogen nitrogen fertilizers |
| url | https://hdl.handle.net/10568/42078 |
| work_keys_str_mv | AT shresthas chlorophyllindexphotochemicalreflectanceindexandchlorophyllfluorescencemeasurementsofriceleavessuppliedwithdifferentnlevels AT brueckh chlorophyllindexphotochemicalreflectanceindexandchlorophyllfluorescencemeasurementsofriceleavessuppliedwithdifferentnlevels AT aschf chlorophyllindexphotochemicalreflectanceindexandchlorophyllfluorescencemeasurementsofriceleavessuppliedwithdifferentnlevels |