Stable isotope natural abundances (δ13C and δ15N) and carbon-water relations as drought stress mechanism response of taro (Colocasia esculenta L. Schott)
Taro (Colocasia esculenta L. Schott) is an important staple food crop in tropical and developing countries, having high water requirements. The purpose of this study was to evaluate the feasibility of using carbon and nitrogen isotopic composition (δ13C and δ15N) as a physiological indicator of taro response to drought, and elucidation of the relationship between the water use efficiency (WUE) under drought conditions and carbon isotope discrimination (Δ13C). As an alternative to WUE determination, obtained by measuring plant growth and water loss during an entire vegetative cycle, we have used Δ13C to determine the tolerance of C3 taro plants to drought. Seven taro accessions from Madeira, Canary Islands and the Secretariat of the Pacific Community (Fiji) collections were grown under greenhouse conditions and subjected to different watering regimes during a one-year cycle. Total plant biomass (TPB), WUE and δ15N were determined at the whole-plant level (WP). Corms and shoots were evaluated separately for nitrogen content (N), δ13C, Δ13C and δ15N. WUE showed positive correlation with TPB (r = 0.4) and negative with Δ13C (r = −0.3); Corm δ15N showed positive correlations with WP δ15N (r = 0.6) and corm N (r = 0.3). Accordingly, the taro plants with enhanced WUE exhibited low Δ13C and δ15N values as a physiological response to drought stress. The approach used in the present study has developed new tools that could be used in further research on taro response to environmental stresses.
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Subjects: | F60 - Physiologie et biochimie végétale, P10 - Ressources en eau et leur gestion, taro, Colocasia esculenta, cycle du carbone, résistance à la sécheresse, cycle de l'azote, besoin en eau, plante alimentaire, http://aims.fao.org/aos/agrovoc/c_14791, http://aims.fao.org/aos/agrovoc/c_1765, http://aims.fao.org/aos/agrovoc/c_17299, http://aims.fao.org/aos/agrovoc/c_2392, http://aims.fao.org/aos/agrovoc/c_27938, http://aims.fao.org/aos/agrovoc/c_8323, http://aims.fao.org/aos/agrovoc/c_3017, http://aims.fao.org/aos/agrovoc/c_1241, |
Online Access: | http://agritrop.cirad.fr/591623/ http://agritrop.cirad.fr/591623/1/Gouveia%20stable%20isotopes%20et%20al%202019.pdf |
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dig-cirad-fr-5916232024-01-29T01:45:07Z http://agritrop.cirad.fr/591623/ http://agritrop.cirad.fr/591623/ Stable isotope natural abundances (δ13C and δ15N) and carbon-water relations as drought stress mechanism response of taro (Colocasia esculenta L. Schott). Gouveia Carla S.S., Ganança José F.T., Slaski Jan, Lebot Vincent, Pinheiro de Carvalho Miguel A.A.. 2019. Journal of Plant Physiology, 232 : 100-106.https://doi.org/10.1016/j.jplph.2018.11.024 <https://doi.org/10.1016/j.jplph.2018.11.024> Stable isotope natural abundances (δ13C and δ15N) and carbon-water relations as drought stress mechanism response of taro (Colocasia esculenta L. Schott) Gouveia, Carla S.S. Ganança, José F.T. Slaski, Jan Lebot, Vincent Pinheiro de Carvalho, Miguel A.A. eng 2019 Journal of Plant Physiology F60 - Physiologie et biochimie végétale P10 - Ressources en eau et leur gestion taro Colocasia esculenta cycle du carbone résistance à la sécheresse cycle de l'azote besoin en eau plante alimentaire http://aims.fao.org/aos/agrovoc/c_14791 http://aims.fao.org/aos/agrovoc/c_1765 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_27938 http://aims.fao.org/aos/agrovoc/c_8323 http://aims.fao.org/aos/agrovoc/c_3017 Canaries (îles) http://aims.fao.org/aos/agrovoc/c_1241 Taro (Colocasia esculenta L. Schott) is an important staple food crop in tropical and developing countries, having high water requirements. The purpose of this study was to evaluate the feasibility of using carbon and nitrogen isotopic composition (δ13C and δ15N) as a physiological indicator of taro response to drought, and elucidation of the relationship between the water use efficiency (WUE) under drought conditions and carbon isotope discrimination (Δ13C). As an alternative to WUE determination, obtained by measuring plant growth and water loss during an entire vegetative cycle, we have used Δ13C to determine the tolerance of C3 taro plants to drought. Seven taro accessions from Madeira, Canary Islands and the Secretariat of the Pacific Community (Fiji) collections were grown under greenhouse conditions and subjected to different watering regimes during a one-year cycle. Total plant biomass (TPB), WUE and δ15N were determined at the whole-plant level (WP). Corms and shoots were evaluated separately for nitrogen content (N), δ13C, Δ13C and δ15N. WUE showed positive correlation with TPB (r = 0.4) and negative with Δ13C (r = −0.3); Corm δ15N showed positive correlations with WP δ15N (r = 0.6) and corm N (r = 0.3). Accordingly, the taro plants with enhanced WUE exhibited low Δ13C and δ15N values as a physiological response to drought stress. The approach used in the present study has developed new tools that could be used in further research on taro response to environmental stresses. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/591623/1/Gouveia%20stable%20isotopes%20et%20al%202019.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1016/j.jplph.2018.11.024 10.1016/j.jplph.2018.11.024 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jplph.2018.11.024 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/j.jplph.2018.11.024 |
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F60 - Physiologie et biochimie végétale P10 - Ressources en eau et leur gestion taro Colocasia esculenta cycle du carbone résistance à la sécheresse cycle de l'azote besoin en eau plante alimentaire http://aims.fao.org/aos/agrovoc/c_14791 http://aims.fao.org/aos/agrovoc/c_1765 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_27938 http://aims.fao.org/aos/agrovoc/c_8323 http://aims.fao.org/aos/agrovoc/c_3017 http://aims.fao.org/aos/agrovoc/c_1241 F60 - Physiologie et biochimie végétale P10 - Ressources en eau et leur gestion taro Colocasia esculenta cycle du carbone résistance à la sécheresse cycle de l'azote besoin en eau plante alimentaire http://aims.fao.org/aos/agrovoc/c_14791 http://aims.fao.org/aos/agrovoc/c_1765 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_27938 http://aims.fao.org/aos/agrovoc/c_8323 http://aims.fao.org/aos/agrovoc/c_3017 http://aims.fao.org/aos/agrovoc/c_1241 |
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F60 - Physiologie et biochimie végétale P10 - Ressources en eau et leur gestion taro Colocasia esculenta cycle du carbone résistance à la sécheresse cycle de l'azote besoin en eau plante alimentaire http://aims.fao.org/aos/agrovoc/c_14791 http://aims.fao.org/aos/agrovoc/c_1765 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_27938 http://aims.fao.org/aos/agrovoc/c_8323 http://aims.fao.org/aos/agrovoc/c_3017 http://aims.fao.org/aos/agrovoc/c_1241 F60 - Physiologie et biochimie végétale P10 - Ressources en eau et leur gestion taro Colocasia esculenta cycle du carbone résistance à la sécheresse cycle de l'azote besoin en eau plante alimentaire http://aims.fao.org/aos/agrovoc/c_14791 http://aims.fao.org/aos/agrovoc/c_1765 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_27938 http://aims.fao.org/aos/agrovoc/c_8323 http://aims.fao.org/aos/agrovoc/c_3017 http://aims.fao.org/aos/agrovoc/c_1241 Gouveia, Carla S.S. Ganança, José F.T. Slaski, Jan Lebot, Vincent Pinheiro de Carvalho, Miguel A.A. Stable isotope natural abundances (δ13C and δ15N) and carbon-water relations as drought stress mechanism response of taro (Colocasia esculenta L. Schott) |
description |
Taro (Colocasia esculenta L. Schott) is an important staple food crop in tropical and developing countries, having high water requirements. The purpose of this study was to evaluate the feasibility of using carbon and nitrogen isotopic composition (δ13C and δ15N) as a physiological indicator of taro response to drought, and elucidation of the relationship between the water use efficiency (WUE) under drought conditions and carbon isotope discrimination (Δ13C). As an alternative to WUE determination, obtained by measuring plant growth and water loss during an entire vegetative cycle, we have used Δ13C to determine the tolerance of C3 taro plants to drought. Seven taro accessions from Madeira, Canary Islands and the Secretariat of the Pacific Community (Fiji) collections were grown under greenhouse conditions and subjected to different watering regimes during a one-year cycle. Total plant biomass (TPB), WUE and δ15N were determined at the whole-plant level (WP). Corms and shoots were evaluated separately for nitrogen content (N), δ13C, Δ13C and δ15N. WUE showed positive correlation with TPB (r = 0.4) and negative with Δ13C (r = −0.3); Corm δ15N showed positive correlations with WP δ15N (r = 0.6) and corm N (r = 0.3). Accordingly, the taro plants with enhanced WUE exhibited low Δ13C and δ15N values as a physiological response to drought stress. The approach used in the present study has developed new tools that could be used in further research on taro response to environmental stresses. |
format |
article |
topic_facet |
F60 - Physiologie et biochimie végétale P10 - Ressources en eau et leur gestion taro Colocasia esculenta cycle du carbone résistance à la sécheresse cycle de l'azote besoin en eau plante alimentaire http://aims.fao.org/aos/agrovoc/c_14791 http://aims.fao.org/aos/agrovoc/c_1765 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_27938 http://aims.fao.org/aos/agrovoc/c_8323 http://aims.fao.org/aos/agrovoc/c_3017 http://aims.fao.org/aos/agrovoc/c_1241 |
author |
Gouveia, Carla S.S. Ganança, José F.T. Slaski, Jan Lebot, Vincent Pinheiro de Carvalho, Miguel A.A. |
author_facet |
Gouveia, Carla S.S. Ganança, José F.T. Slaski, Jan Lebot, Vincent Pinheiro de Carvalho, Miguel A.A. |
author_sort |
Gouveia, Carla S.S. |
title |
Stable isotope natural abundances (δ13C and δ15N) and carbon-water relations as drought stress mechanism response of taro (Colocasia esculenta L. Schott) |
title_short |
Stable isotope natural abundances (δ13C and δ15N) and carbon-water relations as drought stress mechanism response of taro (Colocasia esculenta L. Schott) |
title_full |
Stable isotope natural abundances (δ13C and δ15N) and carbon-water relations as drought stress mechanism response of taro (Colocasia esculenta L. Schott) |
title_fullStr |
Stable isotope natural abundances (δ13C and δ15N) and carbon-water relations as drought stress mechanism response of taro (Colocasia esculenta L. Schott) |
title_full_unstemmed |
Stable isotope natural abundances (δ13C and δ15N) and carbon-water relations as drought stress mechanism response of taro (Colocasia esculenta L. Schott) |
title_sort |
stable isotope natural abundances (δ13c and δ15n) and carbon-water relations as drought stress mechanism response of taro (colocasia esculenta l. schott) |
url |
http://agritrop.cirad.fr/591623/ http://agritrop.cirad.fr/591623/1/Gouveia%20stable%20isotopes%20et%20al%202019.pdf |
work_keys_str_mv |
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