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Alfalfa (Medicago sativa L.) pollination service estimation by tripped flowers quantification

Authors

  • Joana P. Haedo Centro de Recursos Naturales Renovables de la Zona Semiárida (CERZOS), CONICET. Laboratorio de Interacciones Bióticas en Agroecosistemas (LIBA). Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET)
  • Sofía Graffigna Centro de Recursos Naturales Renovables de la Zona Semiárida (CERZOS), CONICET. Laboratorio de Interacciones Bióticas en Agroecosistemas (LIBA). Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET)
  • Lucía C. Martínez Laboratorio de Interacciones Bióticas en Agroecosistemas (LIBA). Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET)
  • Juan P. Torretta Cátedra de Botánica General, Facultad de Agronomía, Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET)
  • Hugo J. Marrero Centro de Recursos Naturales Renovables de la Zona Semiárida (CERZOS), CONICET. Laboratorio de Interacciones Bióticas en Agroecosistemas (LIBA). Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET)

DOI:

https://doi.org/10.25260/EA.22.32.2.0.1770

Keywords:

biotic pollination, crops, Medicago sativa, fruit set

Abstract

Biotic pollination directly affects yield of most of crop species. Therefore, monitoring the pollination service in a crop field is very important, although it rarely occurs. Certain pollination mechanisms, such as the explosive mechanism of flowers, would allow farmers to estimate the crop yield quickly and efficiently. The objective of this study is to evaluate a methodology for estimating the pollination service in crops with explosive pollination mechanism through the quantification of tripped flowers. For this, we used 16 alfalfa (Medicago sativa) lots in eight fields located in the Valle Bonaerense del Río Colorado, where we conducted pollination experiments and assessed the proportion of tripped flowers (visited) per inflorescence and the plant reproductive success (estimated as fruit set). Our results showed that a) in alfalfa, non-tripped flowers have a very low probability of becoming fruit, b) a single effective visit is sufficient for fructification, and c) successive visits do not increment the probability of fruit formation. On the other hand, we demonstrated that the proportion of tripped flowers is positively related to fruit set. Our results evidence that the assessment of tripped flowers can be an efficient tool to quantify the pollination service in a crop with an explosive mechanism. Although this methodology does not explain the causes of fructification deficiency, this tool may become the first step in crop problems detection, without neglecting the long-term studies that will improve pollination service in an effective way.

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Estimación del servicio de polinización en un cultivo de alfalfa (Medicago sativa L.) mediante la cuantificación de flores disparadas

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2022-05-11

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Haedo, J. P., Graffigna, S., Martínez, L. C., Torretta, J. P., & Marrero, H. J. (2022). Alfalfa (Medicago sativa L.) pollination service estimation by tripped flowers quantification. Ecología Austral, 32(2), 297–306. https://doi.org/10.25260/EA.22.32.2.0.1770

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Short Communications