EFECTO DE LAS GUÍAS DE NÉCTAR SOBRE LA EFICIENCIA DE POLINIZACIÓN EN ALSTROEMERIA AUREA (ALSTROEMERIACEAE)
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| Format: | Artículo científico |
| Language: | es |
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Instituto de Botánica Darwinion
2009
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| _version_ | 1876469175295148032 |
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| author | Carlos Varela |
| author_facet | Carlos Varela |
| contents | EFECTO DE LAS GUÍAS DE NÉCTAR SOBRE LA EFICIENCIA DE POLINIZACIÓN EN ALSTROEMERIA AUREA (ALSTROEMERIACEAE) Carlos Varela Biología pollination Alstroemeria nectar guides We evaluated the effect that nectar guides have on the efficiency in pollination of flowers in Alstroemeria aurea (Alstroemeriaceae), a herbaceous, xenogamous plant, which blooms in temperate forests of southern South America. The flowers were manipulated in situ and subjected to three treatments: flowers with nectar guides (FCG, not manipulated, control); flowers without nectar guides (FSG, flowers with nectar guides that were obscured) and control-control (CC, flowers in which the nectariferous tepals were covered by other nectariferous tepals to test the possible effect of double petals). The efficiency of pollination was evaluated as a function of visitation frequency, quantity of pollen deposited on the stigmas of visited flowers and quantity of accumulated nectar. Our results show that the absence of nectar guides significantly affected the efficiency of visits by pollinators (¿2 = 18.97, df: 2, p <<0.004) the quantity of pollen grains deposited on stigmas (F = 19.39 ; Gl: 2, p <<0.0001) and the accumulated volume of nectar (F = 12.87, df: 2, p <<0.005). The FSG were less visited, received fewer pollen grains per stigma and had a higher volume of accumulated nectar, unlike the FCG and CC. About 90% of all floral visits were accomplished by Bombus ruderathus (84.11%) and B. dahlbomii (8.41 %), that possess well developed sensory perception (responding to nectar guide patterns in the flowers). We propose that the absence of nectar guides from the flowers of A. aurea, eliminated orientation patterns assisting visitors, indicating access to rewards, and consequently affected their pollination. 2009 artículo científico 0011-6793 https://www.redalyc.org/articulo.oa?id=66914272004 es http://www.redalyc.org/revista.oa?id=669 Darwiniana application/pdf Instituto de Botánica Darwinion Darwiniana (Argentina) Num.2 Vol.47 |
| format | Artículo científico |
| id | redalyc_66914272004 |
| institution | Redalyc |
| language | es |
| publishDate | 2009 |
| publisher | Instituto de Botánica Darwinion |
| spellingShingle | EFECTO DE LAS GUÍAS DE NÉCTAR SOBRE LA EFICIENCIA DE POLINIZACIÓN EN ALSTROEMERIA AUREA (ALSTROEMERIACEAE) Carlos Varela Biología pollination Alstroemeria nectar guides EFECTO DE LAS GUÍAS DE NÉCTAR SOBRE LA EFICIENCIA DE POLINIZACIÓN EN ALSTROEMERIA AUREA (ALSTROEMERIACEAE) Carlos Varela Biología pollination Alstroemeria nectar guides We evaluated the effect that nectar guides have on the efficiency in pollination of flowers in Alstroemeria aurea (Alstroemeriaceae), a herbaceous, xenogamous plant, which blooms in temperate forests of southern South America. The flowers were manipulated in situ and subjected to three treatments: flowers with nectar guides (FCG, not manipulated, control); flowers without nectar guides (FSG, flowers with nectar guides that were obscured) and control-control (CC, flowers in which the nectariferous tepals were covered by other nectariferous tepals to test the possible effect of double petals). The efficiency of pollination was evaluated as a function of visitation frequency, quantity of pollen deposited on the stigmas of visited flowers and quantity of accumulated nectar. Our results show that the absence of nectar guides significantly affected the efficiency of visits by pollinators (¿2 = 18.97, df: 2, p <<0.004) the quantity of pollen grains deposited on stigmas (F = 19.39 ; Gl: 2, p <<0.0001) and the accumulated volume of nectar (F = 12.87, df: 2, p <<0.005). The FSG were less visited, received fewer pollen grains per stigma and had a higher volume of accumulated nectar, unlike the FCG and CC. About 90% of all floral visits were accomplished by Bombus ruderathus (84.11%) and B. dahlbomii (8.41 %), that possess well developed sensory perception (responding to nectar guide patterns in the flowers). We propose that the absence of nectar guides from the flowers of A. aurea, eliminated orientation patterns assisting visitors, indicating access to rewards, and consequently affected their pollination. 2009 artículo científico 0011-6793 https://www.redalyc.org/articulo.oa?id=66914272004 es http://www.redalyc.org/revista.oa?id=669 Darwiniana application/pdf Instituto de Botánica Darwinion Darwiniana (Argentina) Num.2 Vol.47 |
| title | EFECTO DE LAS GUÍAS DE NÉCTAR SOBRE LA EFICIENCIA DE POLINIZACIÓN EN ALSTROEMERIA AUREA (ALSTROEMERIACEAE) |
| topic | Biología pollination Alstroemeria nectar guides |
| url | https://www.redalyc.org/articulo.oa?id=66914272004 |