The potential of stable carbon isotope ratios and leaf temperature as proxies for drought stress in banana under field conditions
Drought stress is a major limiting factor for banana production and the incidence of drought spells is expected to increase with climate change. Climate smart practices and varieties are needed, but evaluation in the field is hampered by a lack of reliable physiological drought stress indicators. We...
| Autores principales: | , , , , , |
|---|---|
| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2022
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/118152 |
| _version_ | 1855535881915465728 |
|---|---|
| author | Vantyghem, M. Merckx, Roel Stevens, B. Hood-Nowotny, R. Swennen, Rony L. Dercon, G. |
| author_browse | Dercon, G. Hood-Nowotny, R. Merckx, Roel Stevens, B. Swennen, Rony L. Vantyghem, M. |
| author_facet | Vantyghem, M. Merckx, Roel Stevens, B. Hood-Nowotny, R. Swennen, Rony L. Dercon, G. |
| author_sort | Vantyghem, M. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Drought stress is a major limiting factor for banana production and the incidence of drought spells is expected to increase with climate change. Climate smart practices and varieties are needed, but evaluation in the field is hampered by a lack of reliable physiological drought stress indicators. We investigated the potential of using stable carbon isotope ratios (δ13C) and leaf temperature and its derived DANS (Degrees above Non-Stressed Canopy) index as proxies for drought stress in banana. Leaf samples were taken for δ13C analysis and leaf temperature was monitored throughout the day in a field trial with different banana plant stages (mother and daughter plants) under two irrigation treatments (rainfed and irrigated) during the dry season in Arusha, Tanzania. We found that δ13C, leaf temperature and DANS were highly sensitive proxies for drought stress in banana. Soil volumetric water content had a significant effect on both δ13C values and DANS. There was a significant difference in δ13C (1.5 ± 0.1‰, p < 0.01) and afternoon leaf temperature (7 ± 1 °C, p < 0.01) between the rainfed and irrigated treatment. To deal with variability in δ13C within the leaf, we developed a banana tailored sampling method. This study also revealed the complexity of carbon isotope dynamics in the intertwined system of mother and daughter plants. Daughter plants had more negative δ13C values (−1.9 ± 0.1‰, p < 0.01) and lower temperatures (4 ± 1 °C) than mother plants. This indicates less stress, but interpretation of the δ13C ratio is complicated by the potential carbon flux from mother to daughter plant. Once we have a full understanding of these complexities within the plant, the δ13C and leaf temperature based methods we developed, can be directly implemented for both mother and daughter plants under various field conditions. |
| format | Journal Article |
| id | CGSpace118152 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace1181522025-10-26T13:02:31Z The potential of stable carbon isotope ratios and leaf temperature as proxies for drought stress in banana under field conditions Vantyghem, M. Merckx, Roel Stevens, B. Hood-Nowotny, R. Swennen, Rony L. Dercon, G. canopy temperature carbon infrared thermometry musa water stress drought stress bananas climate change Drought stress is a major limiting factor for banana production and the incidence of drought spells is expected to increase with climate change. Climate smart practices and varieties are needed, but evaluation in the field is hampered by a lack of reliable physiological drought stress indicators. We investigated the potential of using stable carbon isotope ratios (δ13C) and leaf temperature and its derived DANS (Degrees above Non-Stressed Canopy) index as proxies for drought stress in banana. Leaf samples were taken for δ13C analysis and leaf temperature was monitored throughout the day in a field trial with different banana plant stages (mother and daughter plants) under two irrigation treatments (rainfed and irrigated) during the dry season in Arusha, Tanzania. We found that δ13C, leaf temperature and DANS were highly sensitive proxies for drought stress in banana. Soil volumetric water content had a significant effect on both δ13C values and DANS. There was a significant difference in δ13C (1.5 ± 0.1‰, p < 0.01) and afternoon leaf temperature (7 ± 1 °C, p < 0.01) between the rainfed and irrigated treatment. To deal with variability in δ13C within the leaf, we developed a banana tailored sampling method. This study also revealed the complexity of carbon isotope dynamics in the intertwined system of mother and daughter plants. Daughter plants had more negative δ13C values (−1.9 ± 0.1‰, p < 0.01) and lower temperatures (4 ± 1 °C) than mother plants. This indicates less stress, but interpretation of the δ13C ratio is complicated by the potential carbon flux from mother to daughter plant. Once we have a full understanding of these complexities within the plant, the δ13C and leaf temperature based methods we developed, can be directly implemented for both mother and daughter plants under various field conditions. 2022-02 2022-02-17T11:19:30Z 2022-02-17T11:19:30Z Journal Article https://hdl.handle.net/10568/118152 en Open Access Elsevier Vantyghem, M., Merckx, R., Stevens, B., Hood-Nowotny, R., Swennen, R. & Dercon, G. (2022). The potential of stable carbon isotope ratios and leaf temperature as proxies for drought stress in banana under field conditions. Agricultural Water Management, 260, 107247: 1-12. |
| spellingShingle | canopy temperature carbon infrared thermometry musa water stress drought stress bananas climate change Vantyghem, M. Merckx, Roel Stevens, B. Hood-Nowotny, R. Swennen, Rony L. Dercon, G. The potential of stable carbon isotope ratios and leaf temperature as proxies for drought stress in banana under field conditions |
| title | The potential of stable carbon isotope ratios and leaf temperature as proxies for drought stress in banana under field conditions |
| title_full | The potential of stable carbon isotope ratios and leaf temperature as proxies for drought stress in banana under field conditions |
| title_fullStr | The potential of stable carbon isotope ratios and leaf temperature as proxies for drought stress in banana under field conditions |
| title_full_unstemmed | The potential of stable carbon isotope ratios and leaf temperature as proxies for drought stress in banana under field conditions |
| title_short | The potential of stable carbon isotope ratios and leaf temperature as proxies for drought stress in banana under field conditions |
| title_sort | potential of stable carbon isotope ratios and leaf temperature as proxies for drought stress in banana under field conditions |
| topic | canopy temperature carbon infrared thermometry musa water stress drought stress bananas climate change |
| url | https://hdl.handle.net/10568/118152 |
| work_keys_str_mv | AT vantyghemm thepotentialofstablecarbonisotoperatiosandleaftemperatureasproxiesfordroughtstressinbananaunderfieldconditions AT merckxroel thepotentialofstablecarbonisotoperatiosandleaftemperatureasproxiesfordroughtstressinbananaunderfieldconditions AT stevensb thepotentialofstablecarbonisotoperatiosandleaftemperatureasproxiesfordroughtstressinbananaunderfieldconditions AT hoodnowotnyr thepotentialofstablecarbonisotoperatiosandleaftemperatureasproxiesfordroughtstressinbananaunderfieldconditions AT swennenronyl thepotentialofstablecarbonisotoperatiosandleaftemperatureasproxiesfordroughtstressinbananaunderfieldconditions AT dercong thepotentialofstablecarbonisotoperatiosandleaftemperatureasproxiesfordroughtstressinbananaunderfieldconditions AT vantyghemm potentialofstablecarbonisotoperatiosandleaftemperatureasproxiesfordroughtstressinbananaunderfieldconditions AT merckxroel potentialofstablecarbonisotoperatiosandleaftemperatureasproxiesfordroughtstressinbananaunderfieldconditions AT stevensb potentialofstablecarbonisotoperatiosandleaftemperatureasproxiesfordroughtstressinbananaunderfieldconditions AT hoodnowotnyr potentialofstablecarbonisotoperatiosandleaftemperatureasproxiesfordroughtstressinbananaunderfieldconditions AT swennenronyl potentialofstablecarbonisotoperatiosandleaftemperatureasproxiesfordroughtstressinbananaunderfieldconditions AT dercong potentialofstablecarbonisotoperatiosandleaftemperatureasproxiesfordroughtstressinbananaunderfieldconditions |