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An improved methodology for detecting underestimated remobilization in common wheat (Triticum aestivum L.) stems: Impacts of underestimation on remobilization related traits
Una metodología mejorada para detectar la removilización subestimada en los tallos del trigo común (Triticum aestivum L.): impactos de la subestimación en los rasgos relacionados con la removilización
DOI:
https://doi.org/10.15446/acag.v74n2.122226Palabras clave:
Remobilization efficiency, stem internodes, water soluble carbohydrates, wheat cultivars (en)carbohidratos solubles en agua, cultivares de trigo, eficiencia de removilización, entrenudos del tallo (es)
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To measure carbohydrate remobilization, analysis of the entire stem can yield underestimated results in wheat cultivars with simultaneous carbohydrate accumulation and remobilization in their internodes. This study aimed to develop a new method for the rapid identification of underestimated remobilization. In addition, the influence of this underestimation on remobilization–related traits was examined. 18 wheat cultivars were assessed under Mediterranean and subtropical climatic conditions. Sequential measurements of the entire stem axis and individual internodes were taken at short intervals from anthesis to maturity, with particular attention to the timing of their peak weights. Due to space limitations, only data from the subtropical climate are reported. Results showed that, in 11 cultivars, dry matter remobilization in the lower internodes began significantly earlier than in the peduncle and penultimate internodes. For these cultivars, reliance on the entire-stem weight underestimated actual remobilization by 5 mg to 203 mg, leading to inaccurate cultivar ranking. Additionally, in cultivars in which internode dry matter accumulation and remobilization overlapped, calculating remobilization efficiency based on entire-stem weight failed to provide accurate assessments. In other cultivars, discrepancies were observed between remobilization efficiencies calculated from entire-stem weight and those calculated from individual internodes. Finally, underestimation of entire-stem remobilization reduced estimated contribution percentages by 1.0 % – 11.0 % compared with cumulative internode contributions. Therefore, for a more precise measurement of carbohydrate remobilization in wheat stems, separate measurement of this trait in each internode is highly recommended.
Al medir la removilización de carbohidratos, el análisis del tallo completo arroja resultados subestimados en cultivares de trigo con acumulación y removilización de carbohidratos simultáneas en sus entrenudos. Esta investigación tiene como objetivo desarrollar un nuevo método para la identificación rápida de la removilización subestimada. Además, se examinó la influencia de la subestimación en rasgos relacionados con la removilización. Se evaluaron 18 cultivares de trigo en condiciones climáticas mediterráneas y subtropicales. Se tomaron mediciones secuenciales del eje del tallo completo y de entrenudos individuales a intervalos cortos desde la antesis hasta la madurez, prestando atención al momento de sus pesos máximos. Debido a las limitaciones de espacio, solo se presentan los datos del clima subtropical. Los resultados mostraron que, en 11 cultivares, la removilización de materia seca en los entrenudos inferiores comenzó significativamente antes que en el pedúnculo y los penúltimos entrenudos. Para estos cultivares, basarse en el peso total del tallo subestimó la removilización real entre 5 mg y 203 mg, lo que resultó en una clasificación inexacta de los cultivares. Además, en los cultivares donde la acumulación de materia seca en los entrenudos y la removilización se superponían, el cálculo de la eficiencia de removilización basado en el peso total del tallo no proporcionó evaluaciones precisas. En otros cultivares, se observaron discrepancias entre las eficiencias de removilización calculadas a partir del peso total del tallo y las calculadas a partir de los entrenudos. Finalmente, la subestimación de la removilización del tallo total redujo los porcentajes de contribución estimados entre un 1.0 % y un 11.0 % en comparación con las contribuciones acumuladas de los entrenudos. Por lo tanto, para una medición más precisa de la removilización de carbohidratos en el tallo del trigo, se recomienda la medición por separado de esta característica en cada entrenudo.
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Derechos de autor 2026 Mehdi Joudi, Mohammad Esmailpour, Asghar Mehraban
Esta obra está bajo una licencia internacional Creative Commons Atribución-NoComercial-SinDerivadas 4.0.
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