The metabolism of carbohydrates in roots of cassava (Manihot esculenta Crantz) infected with frogskin disease
Cassava roots with symptoms of frogs kin disease (CFSD) characteristically possess longitudinal "lips" and a peel that has a cork-like aspect. Yields, comprising bulked and starchy roots, are low. Previous studies reported that the phytoplasma 16 SrIII-L is associated with CFSD. However, the plant- pathogen interaction and the pathogenic effects on the host are unknown. The study's objective was therefore to di scover the changes occurring in the metabolism of carbohydrates in cassava roots, both in the presence and absence of symptoms. Samples were take n from healthy and diseased roots of two cassava varieties: Vale ncia and Señorita. The diseased roots were selected for different levels of severity of att ack. Parameters were dry matter content and concentrations of organic acids, re ducing sugars, and total sugars, using HPLC liquid chromatography. Malic acid was found to be more highly concentrated in diseased roots, correlating with the amounts of reducing and total sugars, particularly fructose ( R 2 = 95%). Because of the small quantity of stored starch, the percentage of dry matte r in diseased roots is less than that found in healthy roots. That is, in the diseased roots, starch probably converts into fructose and glucose during the Krebs cycle. These findings contribute towards understanding the pathogenic effects of phytoplasma 16 SrIII-L in cassava roots attacked by CFSD. They are also consistent with reports on phytoplasmas attacking other plant species. (Texte intégral)
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Subjects: | H20 - Maladies des plantes, F60 - Physiologie et biochimie végétale, F30 - Génétique et amélioration des plantes, Manihot esculenta, phytoplasme, métabolisme, racine, variété, glucide, http://aims.fao.org/aos/agrovoc/c_4579, http://aims.fao.org/aos/agrovoc/c_26802, http://aims.fao.org/aos/agrovoc/c_4769, http://aims.fao.org/aos/agrovoc/c_6651, http://aims.fao.org/aos/agrovoc/c_8157, http://aims.fao.org/aos/agrovoc/c_1300, http://aims.fao.org/aos/agrovoc/c_1767, |
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dig-cirad-fr-5759262024-01-28T22:39:53Z http://agritrop.cirad.fr/575926/ http://agritrop.cirad.fr/575926/ The metabolism of carbohydrates in roots of cassava (Manihot esculenta Crantz) infected with frogskin disease. Alvarez Eduardo, Pardo J.M., Dufour Dominique, Moreno Jhon L., Alvarez E.. 2014. Phytopathology, 104 (11), suppl. : 7. APS-CPS Joint Meeting, Minneapolis, États-Unis, 9 Août 2014/14 Août 2014.https://doi.org/10.1094/PHYTO-104-11-S3.1 <https://doi.org/10.1094/PHYTO-104-11-S3.1> The metabolism of carbohydrates in roots of cassava (Manihot esculenta Crantz) infected with frogskin disease Alvarez, Eduardo Pardo, J.M. Dufour, Dominique Moreno, Jhon L. Alvarez, E. eng 2014 Phytopathology H20 - Maladies des plantes F60 - Physiologie et biochimie végétale F30 - Génétique et amélioration des plantes Manihot esculenta phytoplasme métabolisme racine variété glucide http://aims.fao.org/aos/agrovoc/c_4579 http://aims.fao.org/aos/agrovoc/c_26802 http://aims.fao.org/aos/agrovoc/c_4769 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_1300 Colombie http://aims.fao.org/aos/agrovoc/c_1767 Cassava roots with symptoms of frogs kin disease (CFSD) characteristically possess longitudinal "lips" and a peel that has a cork-like aspect. Yields, comprising bulked and starchy roots, are low. Previous studies reported that the phytoplasma 16 SrIII-L is associated with CFSD. However, the plant- pathogen interaction and the pathogenic effects on the host are unknown. The study's objective was therefore to di scover the changes occurring in the metabolism of carbohydrates in cassava roots, both in the presence and absence of symptoms. Samples were take n from healthy and diseased roots of two cassava varieties: Vale ncia and Señorita. The diseased roots were selected for different levels of severity of att ack. Parameters were dry matter content and concentrations of organic acids, re ducing sugars, and total sugars, using HPLC liquid chromatography. Malic acid was found to be more highly concentrated in diseased roots, correlating with the amounts of reducing and total sugars, particularly fructose ( R 2 = 95%). Because of the small quantity of stored starch, the percentage of dry matte r in diseased roots is less than that found in healthy roots. That is, in the diseased roots, starch probably converts into fructose and glucose during the Krebs cycle. These findings contribute towards understanding the pathogenic effects of phytoplasma 16 SrIII-L in cassava roots attacked by CFSD. They are also consistent with reports on phytoplasmas attacking other plant species. (Texte intégral) article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/575926/1/document_575926.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1094/PHYTO-104-11-S3.1 10.1094/PHYTO-104-11-S3.1 info:eu-repo/semantics/altIdentifier/doi/10.1094/PHYTO-104-11-S3.1 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1094/PHYTO-104-11-S3.1 |
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H20 - Maladies des plantes F60 - Physiologie et biochimie végétale F30 - Génétique et amélioration des plantes Manihot esculenta phytoplasme métabolisme racine variété glucide http://aims.fao.org/aos/agrovoc/c_4579 http://aims.fao.org/aos/agrovoc/c_26802 http://aims.fao.org/aos/agrovoc/c_4769 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_1300 http://aims.fao.org/aos/agrovoc/c_1767 H20 - Maladies des plantes F60 - Physiologie et biochimie végétale F30 - Génétique et amélioration des plantes Manihot esculenta phytoplasme métabolisme racine variété glucide http://aims.fao.org/aos/agrovoc/c_4579 http://aims.fao.org/aos/agrovoc/c_26802 http://aims.fao.org/aos/agrovoc/c_4769 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_1300 http://aims.fao.org/aos/agrovoc/c_1767 |
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H20 - Maladies des plantes F60 - Physiologie et biochimie végétale F30 - Génétique et amélioration des plantes Manihot esculenta phytoplasme métabolisme racine variété glucide http://aims.fao.org/aos/agrovoc/c_4579 http://aims.fao.org/aos/agrovoc/c_26802 http://aims.fao.org/aos/agrovoc/c_4769 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_1300 http://aims.fao.org/aos/agrovoc/c_1767 H20 - Maladies des plantes F60 - Physiologie et biochimie végétale F30 - Génétique et amélioration des plantes Manihot esculenta phytoplasme métabolisme racine variété glucide http://aims.fao.org/aos/agrovoc/c_4579 http://aims.fao.org/aos/agrovoc/c_26802 http://aims.fao.org/aos/agrovoc/c_4769 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_1300 http://aims.fao.org/aos/agrovoc/c_1767 Alvarez, Eduardo Pardo, J.M. Dufour, Dominique Moreno, Jhon L. Alvarez, E. The metabolism of carbohydrates in roots of cassava (Manihot esculenta Crantz) infected with frogskin disease |
description |
Cassava roots with symptoms of frogs kin disease (CFSD) characteristically possess longitudinal "lips" and a peel that has a cork-like aspect. Yields, comprising bulked and starchy roots, are low. Previous studies reported that the phytoplasma 16 SrIII-L is associated with CFSD. However, the plant- pathogen interaction and the pathogenic effects on the host are unknown. The study's objective was therefore to di scover the changes occurring in the metabolism of carbohydrates in cassava roots, both in the presence and absence of symptoms. Samples were take n from healthy and diseased roots of two cassava varieties: Vale ncia and Señorita. The diseased roots were selected for different levels of severity of att ack. Parameters were dry matter content and concentrations of organic acids, re ducing sugars, and total sugars, using HPLC liquid chromatography. Malic acid was found to be more highly concentrated in diseased roots, correlating with the amounts of reducing and total sugars, particularly fructose ( R 2 = 95%). Because of the small quantity of stored starch, the percentage of dry matte r in diseased roots is less than that found in healthy roots. That is, in the diseased roots, starch probably converts into fructose and glucose during the Krebs cycle. These findings contribute towards understanding the pathogenic effects of phytoplasma 16 SrIII-L in cassava roots attacked by CFSD. They are also consistent with reports on phytoplasmas attacking other plant species. (Texte intégral) |
format |
article |
topic_facet |
H20 - Maladies des plantes F60 - Physiologie et biochimie végétale F30 - Génétique et amélioration des plantes Manihot esculenta phytoplasme métabolisme racine variété glucide http://aims.fao.org/aos/agrovoc/c_4579 http://aims.fao.org/aos/agrovoc/c_26802 http://aims.fao.org/aos/agrovoc/c_4769 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_1300 http://aims.fao.org/aos/agrovoc/c_1767 |
author |
Alvarez, Eduardo Pardo, J.M. Dufour, Dominique Moreno, Jhon L. Alvarez, E. |
author_facet |
Alvarez, Eduardo Pardo, J.M. Dufour, Dominique Moreno, Jhon L. Alvarez, E. |
author_sort |
Alvarez, Eduardo |
title |
The metabolism of carbohydrates in roots of cassava (Manihot esculenta Crantz) infected with frogskin disease |
title_short |
The metabolism of carbohydrates in roots of cassava (Manihot esculenta Crantz) infected with frogskin disease |
title_full |
The metabolism of carbohydrates in roots of cassava (Manihot esculenta Crantz) infected with frogskin disease |
title_fullStr |
The metabolism of carbohydrates in roots of cassava (Manihot esculenta Crantz) infected with frogskin disease |
title_full_unstemmed |
The metabolism of carbohydrates in roots of cassava (Manihot esculenta Crantz) infected with frogskin disease |
title_sort |
metabolism of carbohydrates in roots of cassava (manihot esculenta crantz) infected with frogskin disease |
url |
http://agritrop.cirad.fr/575926/ http://agritrop.cirad.fr/575926/1/document_575926.pdf |
work_keys_str_mv |
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