Agronomic and physiological evaluation of eight cassava clones under water deficit conditions.
Cassava (Manihot esculenta Crantz) is an important crop in Africa, Asia, Latin America, and the Caribbean. This species grows adequately in drought conditions and is ideal to ensure food safety in marginal environments, such as soils with low fertility and low rainfall conditions. Complementary irri...
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| Format: | Article |
| Language: | English |
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Universidad Nacional de Colombia, Sede Medellín
2020-01-01
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| Series: | Revista Facultad Nacional de Agronomía Medellín |
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| Online Access: | https://revistas.unal.edu.co/index.php/refame/article/view/75402 |
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| author | Rommel Igor Leon Pacheco Mercedes Pérez Macias Francia Concepción Fuenmayor Campos Adrián José Rodríguez Izquierdo Gustavo Adolfo Rodríguez Izquierdo |
| author_facet | Rommel Igor Leon Pacheco Mercedes Pérez Macias Francia Concepción Fuenmayor Campos Adrián José Rodríguez Izquierdo Gustavo Adolfo Rodríguez Izquierdo |
| author_sort | Rommel Igor Leon Pacheco |
| collection | DOAJ |
| description | Cassava (Manihot esculenta Crantz) is an important crop in Africa, Asia, Latin America, and the Caribbean. This species grows adequately in drought conditions and is ideal to ensure food safety in marginal environments, such as soils with low fertility and low rainfall conditions. Complementary irrigation practices can be used, or genotypes with good yield potential can be identified against these conditions to enhance productivity in those environments. For this reason, this research aimed to study several physiological mechanisms and agronomical characteristics in eight cassava clones under prolonged water deficit. The experimental design was a split-plot where the principal plot was composed of three irrigation treatments (7, 15, and 21 days without irrigation, DWI) and the secondary plot by the eight clones. The results showed that cassava plants against drought conditions (21 DWI) decreased their growth, foliar expansion, and partially closed the stomata, avoiding water losses through transpiration. The variables of the net assimilation rate of CO2, yield, and biomass accumulation were not affected by the maximum drought period. The best clones under drought were Guajira, Guajira 3, Guajira 4, Concha Rosada, and MeVen 77-1. The frequency of irrigation 15 DWI increased the variables of gas exchange and vegetative growth. This behavior is due to the ability to tolerate complex conditions through morphological and physiological mechanisms, among them, long life leaf, stomatal control, and high photosynthetic potential. |
| first_indexed | 2024-12-19T21:14:54Z |
| format | Article |
| id | doaj.art-0c01a90e78364fe78fa547a32a4c43fc |
| institution | Directory Open Access Journal |
| issn | 0304-2847 2248-7026 |
| language | English |
| last_indexed | 2024-12-19T21:14:54Z |
| publishDate | 2020-01-01 |
| publisher | Universidad Nacional de Colombia, Sede Medellín |
| record_format | Article |
| series | Revista Facultad Nacional de Agronomía Medellín |
| spelling | doaj.art-0c01a90e78364fe78fa547a32a4c43fc2022-12-21T20:05:22ZengUniversidad Nacional de Colombia, Sede MedellínRevista Facultad Nacional de Agronomía Medellín0304-28472248-70262020-01-017319109911910.15446/rfnam.v73n1.7540252061Agronomic and physiological evaluation of eight cassava clones under water deficit conditions.Rommel Igor Leon Pacheco0Mercedes Pérez Macias1Francia Concepción Fuenmayor Campos2Adrián José Rodríguez Izquierdo3Gustavo Adolfo Rodríguez Izquierdo4Corporación Colombiana de Investigación Agropecuaria - AGROSAVIAInstituto Nacional de Investigaciones Agrícolas - INIAInstituto Nacional de Investigaciones Agrícolas - INIAInstituto Nacional de Investigaciones Agrícolas - INIACorporación Colombiana de Investigación Agropecuaria - AGROSAVIACassava (Manihot esculenta Crantz) is an important crop in Africa, Asia, Latin America, and the Caribbean. This species grows adequately in drought conditions and is ideal to ensure food safety in marginal environments, such as soils with low fertility and low rainfall conditions. Complementary irrigation practices can be used, or genotypes with good yield potential can be identified against these conditions to enhance productivity in those environments. For this reason, this research aimed to study several physiological mechanisms and agronomical characteristics in eight cassava clones under prolonged water deficit. The experimental design was a split-plot where the principal plot was composed of three irrigation treatments (7, 15, and 21 days without irrigation, DWI) and the secondary plot by the eight clones. The results showed that cassava plants against drought conditions (21 DWI) decreased their growth, foliar expansion, and partially closed the stomata, avoiding water losses through transpiration. The variables of the net assimilation rate of CO2, yield, and biomass accumulation were not affected by the maximum drought period. The best clones under drought were Guajira, Guajira 3, Guajira 4, Concha Rosada, and MeVen 77-1. The frequency of irrigation 15 DWI increased the variables of gas exchange and vegetative growth. This behavior is due to the ability to tolerate complex conditions through morphological and physiological mechanisms, among them, long life leaf, stomatal control, and high photosynthetic potential.https://revistas.unal.edu.co/index.php/refame/article/view/75402droughtgas exchangegrowthmanihot esculentaproductivity |
| spellingShingle | Rommel Igor Leon Pacheco Mercedes Pérez Macias Francia Concepción Fuenmayor Campos Adrián José Rodríguez Izquierdo Gustavo Adolfo Rodríguez Izquierdo Agronomic and physiological evaluation of eight cassava clones under water deficit conditions. Revista Facultad Nacional de Agronomía Medellín drought gas exchange growth manihot esculenta productivity |
| title | Agronomic and physiological evaluation of eight cassava clones under water deficit conditions. |
| title_full | Agronomic and physiological evaluation of eight cassava clones under water deficit conditions. |
| title_fullStr | Agronomic and physiological evaluation of eight cassava clones under water deficit conditions. |
| title_full_unstemmed | Agronomic and physiological evaluation of eight cassava clones under water deficit conditions. |
| title_short | Agronomic and physiological evaluation of eight cassava clones under water deficit conditions. |
| title_sort | agronomic and physiological evaluation of eight cassava clones under water deficit conditions |
| topic | drought gas exchange growth manihot esculenta productivity |
| url | https://revistas.unal.edu.co/index.php/refame/article/view/75402 |
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