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Determination of alkaloids in onion nectar by micellar electrokinetic chromatography
Soto Vargas, Verónica Carolina; Jofre, Viviana Patricia; Galmarini, Claudio Romulo; Silva, Maria Fernanda (2016)Nectar is the most important floral reward offered by plants to insects. Minor components such as alkaloid compounds in nectar affect bee foraging, with great influence in seed production. CE is an advantageous tool for ... -
Direct analysis of néctar and floral volatile organic compounds in hybrid onions by HS-SPME/GC-MS: Relationship with pollination and seed production
Soto Vargas, Verónica Carolina; Maldonado, Irma Beatriz; Jofre, Viviana Patricia; Galmarini, Claudio Romulo; Silva, Maria Fernanda (2016)In this study, a simple and solvent-free method using headspace solid-phase microextraction (SPME) and gas chromatography–mass spectrometry (GC–MS) was developed for determination of the volatile compounds from fresh flowers ... -
Effect of Nectar Composition on Bee Attraction for Onion Seed Production
Soto Vargas, Verónica Carolina; Silva, Maria Fernanda; Galmarini, Claudio Romulo (Nova Science Publishers, 2015-02)Onion is the second most cultivated vegetable crop in the world. Two types of onion varieties are usually grown around the world; open pollinated (OP) and first generation (F1) hybrids. Honey bees are the main pollinators ... -
Nectar and flower traits of different onion male sterile lines related to pollination efficiency and seed yield of F1 hybrids
Soto Vargas, Verónica Carolina; Maldonado, Irma Beatriz; Gil, Raul Andres; Peralta, Iris Edith; Silva, Maria Fernanda; Galmarini, Claudio Romulo (Entomological Society of America, 2013-06)Honey bees are the main pollinators of onion crops for seed production, but owing to low attractiveness of flowers, pollination is often inadequate. Pollination problems result in low seed yields. This problem is accentuated ... -
Onion Hybrid Seed Production: Relation with Nectar Composition and Flower Traits
Soto Vargas, Verónica Carolina; Caselles, Cristian A.; Silva, Maria Fernanda; Galmarini, Claudio Romulo (2018-05)Onion (Allium cepa L.) is one of the main vegetable crops. Pollinators are required for onion seed production, being honeybees the most used. Around the world, two types of onion varieties are grown: open pollinated (OP) ... -
Volatile organic compounds characterized from grapevine (Vitis vinifera L. cv. Malbec) berries increase at pre-harvest and in response to UV-B radiation
Gil, Mariana; Bottini, Ambrosio Rubén; Berli, Federico Javier; Pontin, Mariela Ana; Silva, Maria Fernanda; Piccoli, Patricia Noemí (2013-12)Ultraviolet-B solar radiation (UV-B) is an environmental signal with biological effects in plant tissues. Recent investigations have assigned a protective role of volatile organic compounds (VOCs) in plant tissues submitted ...