Quantitation of oxalates in corms and shoots of Colocasia esculenta (L.) Schott under drought conditions
Oxalate (calcium oxalate) accumulation in taro plants (Colocasia esculenta (L.) Schott) impacts their nutritional quality, producing acridity, causing lips, mouth and throat tissues swelling if consumed fresh. The oxalate content is related to photosynthesis, through the glycolate–glyoxylate oxidation pathway. The plant's photosynthetic rate usually increases in non-stressed conditions. Differences in photosynthetic rate are indirectly related to the chlorophyll content index. Protein accumulation and starch variation are also important traits to understand the taro oxalate synthesis caused by drought and how they affect corm quality. The purpose of this study was to quantitate oxalates in taro corms and shoots submitted to drought conditions and to evaluate how stress response can affect the nutritional quality of taro whole-plant. Seven taro genotypes from Madeira, Canaries and Pacific Community (SPC) collections were grown in greenhouse conditions and submitted to different watering regimes for drought tolerance screening. Corms and shoots were harvested and evaluated for oxalates (soluble, insoluble and total), chlorophyll content index (CCI), crude protein, starch, starch solubility in water and starch swelling power. All accessions had very high calcium oxalate content. Drought-tolerant genotypes showed good osmotic response by oxalate precipitation and mobilization through shoot to corm tissues, photosynthesis adaptation by increase of CCI, protein accumulation, and very low starch hydrolysis. Sensitive-drought genotypes showed less mobilization of calcium oxalate, decreased photosynthetic rate and protein synthesis, and slight increase of starch hydrolysis. Variation in taro oxalate content is consistent and significantly correlated with the photosynthetic rate, carbohydrate metabolism and protein synthesis.
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Subjects: | Q03 - Contamination et toxicologie alimentaires, F60 - Physiologie et biochimie végétale, F30 - Génétique et amélioration des plantes, Colocasia esculenta, taro, http://aims.fao.org/aos/agrovoc/c_1765, http://aims.fao.org/aos/agrovoc/c_14791, http://aims.fao.org/aos/agrovoc/c_4511, http://aims.fao.org/aos/agrovoc/c_1241, http://aims.fao.org/aos/agrovoc/c_5493, |
Online Access: | http://agritrop.cirad.fr/589618/ http://agritrop.cirad.fr/589618/1/Gouveia2018_Article_QuantitationOfOxalatesInCormsA.pdf |
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dig-cirad-fr-5896182024-01-29T01:22:31Z http://agritrop.cirad.fr/589618/ http://agritrop.cirad.fr/589618/ Quantitation of oxalates in corms and shoots of Colocasia esculenta (L.) Schott under drought conditions. Gouveia Carla S.S., Ganança José F.T., Lebot Vincent, Pinheiro de Carvalho Miguel A.A.. 2018. Acta Physiologiae Plantarum, 40:214, 11 p.https://doi.org/10.1007/s11738-018-2784-7 <https://doi.org/10.1007/s11738-018-2784-7> Quantitation of oxalates in corms and shoots of Colocasia esculenta (L.) Schott under drought conditions Gouveia, Carla S.S. Ganança, José F.T. Lebot, Vincent Pinheiro de Carvalho, Miguel A.A. eng 2018 Acta Physiologiae Plantarum Q03 - Contamination et toxicologie alimentaires F60 - Physiologie et biochimie végétale F30 - Génétique et amélioration des plantes Colocasia esculenta taro http://aims.fao.org/aos/agrovoc/c_1765 http://aims.fao.org/aos/agrovoc/c_14791 Madère Canaries (îles) océan Pacifique http://aims.fao.org/aos/agrovoc/c_4511 http://aims.fao.org/aos/agrovoc/c_1241 http://aims.fao.org/aos/agrovoc/c_5493 Oxalate (calcium oxalate) accumulation in taro plants (Colocasia esculenta (L.) Schott) impacts their nutritional quality, producing acridity, causing lips, mouth and throat tissues swelling if consumed fresh. The oxalate content is related to photosynthesis, through the glycolate–glyoxylate oxidation pathway. The plant's photosynthetic rate usually increases in non-stressed conditions. Differences in photosynthetic rate are indirectly related to the chlorophyll content index. Protein accumulation and starch variation are also important traits to understand the taro oxalate synthesis caused by drought and how they affect corm quality. The purpose of this study was to quantitate oxalates in taro corms and shoots submitted to drought conditions and to evaluate how stress response can affect the nutritional quality of taro whole-plant. Seven taro genotypes from Madeira, Canaries and Pacific Community (SPC) collections were grown in greenhouse conditions and submitted to different watering regimes for drought tolerance screening. Corms and shoots were harvested and evaluated for oxalates (soluble, insoluble and total), chlorophyll content index (CCI), crude protein, starch, starch solubility in water and starch swelling power. All accessions had very high calcium oxalate content. Drought-tolerant genotypes showed good osmotic response by oxalate precipitation and mobilization through shoot to corm tissues, photosynthesis adaptation by increase of CCI, protein accumulation, and very low starch hydrolysis. Sensitive-drought genotypes showed less mobilization of calcium oxalate, decreased photosynthetic rate and protein synthesis, and slight increase of starch hydrolysis. Variation in taro oxalate content is consistent and significantly correlated with the photosynthetic rate, carbohydrate metabolism and protein synthesis. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/589618/1/Gouveia2018_Article_QuantitationOfOxalatesInCormsA.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1007/s11738-018-2784-7 10.1007/s11738-018-2784-7 info:eu-repo/semantics/altIdentifier/doi/10.1007/s11738-018-2784-7 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1007/s11738-018-2784-7 |
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Q03 - Contamination et toxicologie alimentaires F60 - Physiologie et biochimie végétale F30 - Génétique et amélioration des plantes Colocasia esculenta taro http://aims.fao.org/aos/agrovoc/c_1765 http://aims.fao.org/aos/agrovoc/c_14791 http://aims.fao.org/aos/agrovoc/c_4511 http://aims.fao.org/aos/agrovoc/c_1241 http://aims.fao.org/aos/agrovoc/c_5493 Q03 - Contamination et toxicologie alimentaires F60 - Physiologie et biochimie végétale F30 - Génétique et amélioration des plantes Colocasia esculenta taro http://aims.fao.org/aos/agrovoc/c_1765 http://aims.fao.org/aos/agrovoc/c_14791 http://aims.fao.org/aos/agrovoc/c_4511 http://aims.fao.org/aos/agrovoc/c_1241 http://aims.fao.org/aos/agrovoc/c_5493 |
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Q03 - Contamination et toxicologie alimentaires F60 - Physiologie et biochimie végétale F30 - Génétique et amélioration des plantes Colocasia esculenta taro http://aims.fao.org/aos/agrovoc/c_1765 http://aims.fao.org/aos/agrovoc/c_14791 http://aims.fao.org/aos/agrovoc/c_4511 http://aims.fao.org/aos/agrovoc/c_1241 http://aims.fao.org/aos/agrovoc/c_5493 Q03 - Contamination et toxicologie alimentaires F60 - Physiologie et biochimie végétale F30 - Génétique et amélioration des plantes Colocasia esculenta taro http://aims.fao.org/aos/agrovoc/c_1765 http://aims.fao.org/aos/agrovoc/c_14791 http://aims.fao.org/aos/agrovoc/c_4511 http://aims.fao.org/aos/agrovoc/c_1241 http://aims.fao.org/aos/agrovoc/c_5493 Gouveia, Carla S.S. Ganança, José F.T. Lebot, Vincent Pinheiro de Carvalho, Miguel A.A. Quantitation of oxalates in corms and shoots of Colocasia esculenta (L.) Schott under drought conditions |
description |
Oxalate (calcium oxalate) accumulation in taro plants (Colocasia esculenta (L.) Schott) impacts their nutritional quality, producing acridity, causing lips, mouth and throat tissues swelling if consumed fresh. The oxalate content is related to photosynthesis, through the glycolate–glyoxylate oxidation pathway. The plant's photosynthetic rate usually increases in non-stressed conditions. Differences in photosynthetic rate are indirectly related to the chlorophyll content index. Protein accumulation and starch variation are also important traits to understand the taro oxalate synthesis caused by drought and how they affect corm quality. The purpose of this study was to quantitate oxalates in taro corms and shoots submitted to drought conditions and to evaluate how stress response can affect the nutritional quality of taro whole-plant. Seven taro genotypes from Madeira, Canaries and Pacific Community (SPC) collections were grown in greenhouse conditions and submitted to different watering regimes for drought tolerance screening. Corms and shoots were harvested and evaluated for oxalates (soluble, insoluble and total), chlorophyll content index (CCI), crude protein, starch, starch solubility in water and starch swelling power. All accessions had very high calcium oxalate content. Drought-tolerant genotypes showed good osmotic response by oxalate precipitation and mobilization through shoot to corm tissues, photosynthesis adaptation by increase of CCI, protein accumulation, and very low starch hydrolysis. Sensitive-drought genotypes showed less mobilization of calcium oxalate, decreased photosynthetic rate and protein synthesis, and slight increase of starch hydrolysis. Variation in taro oxalate content is consistent and significantly correlated with the photosynthetic rate, carbohydrate metabolism and protein synthesis. |
format |
article |
topic_facet |
Q03 - Contamination et toxicologie alimentaires F60 - Physiologie et biochimie végétale F30 - Génétique et amélioration des plantes Colocasia esculenta taro http://aims.fao.org/aos/agrovoc/c_1765 http://aims.fao.org/aos/agrovoc/c_14791 http://aims.fao.org/aos/agrovoc/c_4511 http://aims.fao.org/aos/agrovoc/c_1241 http://aims.fao.org/aos/agrovoc/c_5493 |
author |
Gouveia, Carla S.S. Ganança, José F.T. Lebot, Vincent Pinheiro de Carvalho, Miguel A.A. |
author_facet |
Gouveia, Carla S.S. Ganança, José F.T. Lebot, Vincent Pinheiro de Carvalho, Miguel A.A. |
author_sort |
Gouveia, Carla S.S. |
title |
Quantitation of oxalates in corms and shoots of Colocasia esculenta (L.) Schott under drought conditions |
title_short |
Quantitation of oxalates in corms and shoots of Colocasia esculenta (L.) Schott under drought conditions |
title_full |
Quantitation of oxalates in corms and shoots of Colocasia esculenta (L.) Schott under drought conditions |
title_fullStr |
Quantitation of oxalates in corms and shoots of Colocasia esculenta (L.) Schott under drought conditions |
title_full_unstemmed |
Quantitation of oxalates in corms and shoots of Colocasia esculenta (L.) Schott under drought conditions |
title_sort |
quantitation of oxalates in corms and shoots of colocasia esculenta (l.) schott under drought conditions |
url |
http://agritrop.cirad.fr/589618/ http://agritrop.cirad.fr/589618/1/Gouveia2018_Article_QuantitationOfOxalatesInCormsA.pdf |
work_keys_str_mv |
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