Comparative physiological and biochemical mechanisms of drought tolerance in three contrasting cultivars of quinoa (Chenopodium quinoa)
Quinoa (Chenopodium quinoa Willd.) is a halophytic, pseudocereal crop, which has a richer nutritional value than other major cereals and is highly resistant to multiple abiotic stresses. In this study, the germination characteristics, morphological, physiological and biochemical changes of three con...
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| Published in | Anales del Jardín Botánico de Madrid (1979) Vol. 79; no. 1; p. e123 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
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Consejo Superior de Investigaciones Científicas
01.01.2022
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| Abstract | Quinoa (Chenopodium quinoa Willd.) is a halophytic, pseudocereal crop, which has a richer nutritional value than other major cereals and is highly resistant to multiple abiotic stresses. In this study, the germination characteristics, morphological, physiological and biochemical changes of three contrasting quinoa cultivars under drought stress were compared. The results indicated that ‘Chaidamuhong’ and ‘Gongzha No.3’ showed stronger drought tolerance than ‘Qingli No.1’. This was mainly manifest in seed germination index, activity of antioxidant enzymes, cell membrane damage and morphological changes. We speculate that the increase in the activity of many antioxidant enzymes and the lower stomatal density make ‘Chaidamuhong’ and ‘Gongzha No.3’ superior in release of reactive oxygen species and water retention than ‘Qingli No.1’, thus reducing the degree of cell damage, and improving drought resistance. |
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| AbstractList | Quinoa (Chenopodium quinoa Willd.) is a halophytic, pseudocereal crop, which has a richer nutritional value than other major cereals and is highly resistant to multiple abiotic stresses. In this study, the germination characteristics, morphological, physiological and biochemical changes of three contrasting quinoa cultivars under drought stress were compared. The results indicated that ‘Chaidamuhong’ and ‘Gongzha No.3’ showed stronger drought tolerance than ‘Qingli No.1’. This was mainly manifest in seed germination index, activity of antioxidant enzymes, cell membrane damage and morphological changes. We speculate that the increase in the activity of many antioxidant enzymes and the lower stomatal density make ‘Chaidamuhong’ and ‘Gongzha No.3’ superior in release of reactive oxygen species and water retention than ‘Qingli No.1’, thus reducing the degree of cell damage, and improving drought resistance. Quinoa (Chenopodium quinoa Willd.) is a halophytic, pseudocereal crop, which has a richer nutritional value than other major cereals and is highly resistant to multiple abiotic stresses. In this study, the germination characteristics, morphological, physiological and biochem-ical changes of three contrasting quinoa cultivars under drought stress were compared. The results indicated that ‘Chaidamuhong’ and ‘Gong-zha No.3’ showed stronger drought tolerance than ‘Qingli No.1’. This was mainly manifest in seed germination index, activity of antioxidant enzymes, cell membrane damage and morphological changes. We spec-ulate that the increase in the activity of many antioxidant enzymes and the lower stomatal density make ‘Chaidamuhong’ and ‘Gongzha No.3’ superior in release of reactive oxygen species and water retention than ‘Qingli No.1’, thus reducing the degree of cell damage, and improving drought resistance. La quinua (Chenopodium quinoa Willd.) es un cultivo de pseudo-cereal halófilo, que tiene un valor nutricional más rico que el de otros cereales importantes y es altamente resistente a múltiples estreses abióticos. En este estudio, se compararon características de germinación, cambios morfológi-cos, fisiológicos y bioquímicos de tres cultivares de contrastantes quinua bajo estrés por sequía. Los resultados indicaron que ‘Chaidamuhong’ y ‘Gongzha No.3’ mostraron una mayor tolerancia a la sequía que ‘Qingli No.1’. Esto se manifestó principalmente en el índice de germinación de las semillas, la acti-vidad de las enzimas antioxidantes, el daño de la membrana celular y los cam-bios morfológicos. Especulamos que el aumento en la actividad de muchas enzimas antioxidantes y la menor densidad estomática hacen que ‘Chaidamu-hong’ y ‘Gongzha No.3’ sean superiores en la liberación de especies reactivas de oxígeno y la retención de agua que ‘Qingli No.1’, reduciendo así el grado de daño celular y mejorando la resistencia a la sequía. |
| Abstract_FL | La quinua (Chenopodium quinoa Willd.) es un cultivo de pseudocereal halófilo, que tiene un valor nutricional más rico que el de otros cereales importantes y es altamente resistente a múltiples estreses abióticos. En este estudio, se compararon características de germinación, cambios morfológicos, fisiológicos y bioquímicos de tres cultivares de contrastantes quinua bajo estrés por sequía. Los resultados indicaron que ‘Chaidamuhong’ y ‘Gongzha No.3’ mostraron una mayor tolerancia a la sequía que ‘Qingli No.1’. Esto se manifestó principalmente en el índice de germinación de las semillas, la actividad de las enzimas antioxidantes, el daño de la membrana celular y los cambios morfológicos. Especulamos que el aumento en la actividad de muchas enzimas antioxidantes y la menor densidad estomática hacen que ‘Chaidamuhong’ y ‘Gongzha No.3’ sean superiores en la liberación de especies reactivas de oxígeno y la retención de agua que ‘Qingli No.1’, reduciendo así el grado de daño celular y mejorando la resistencia a la sequía. |
| Author | Yang, Qian Zhang, Yemeng Chen, Zhiguo Zhu, Lili |
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| Title | Comparative physiological and biochemical mechanisms of drought tolerance in three contrasting cultivars of quinoa (Chenopodium quinoa) |
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