Changes in amino acid decarboxylation in maize (Zea mays; Poaceae) tissues in response to bird cherry-oat aphid (Rhopalosiphum padi; Aphididae) infestation |
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| Institution: | 1. CONICET-IANIGLA, Museo de Historia Natural de San Rafael, Parque Mariano Moreno, San Rafael, Mendoza, Argentina;2. UNCuyo, Parque General San Martín, Mendoza, Argentina;3. CONICET-IANIGLA, CCT CONICET, CC 330, M5502IRA, Mendoza, Prov. de Mendoza, Argentina;4. Far Western ARG, Davis, CA, USA;5. University of Utah, Salt Lake, Utah, USA;6. Museo de Historia Natural de San Rafael, Parque Mariano Moreno, San Rafael, Mendoza, Argentina;7. CONICET-Facultad de Filosofía y Letras, Universidad Nacional de Cuyo, Mendoza, Argentina;8. Instituto de Investigaciones Arqueológicas y Museo “Prof. Mariano Gambier” Facultad de Filosofía, Humanidades y Artes, UNSJ, San Juan, Argentina;9. CONICET-Museo de Ciencias Naturales y Antropológicas “J.C.Moyano”, Mendoza, Argentina;1. Laboratory of Food Process Engineering, Gembloux Agro-Bio Tech, University of Liege, Passage des Déportés, 2, B-5030 Gembloux, Belgium;2. Precision Livestock and Nutrition, Gembloux Agro-Bio Tech, University of Liege, Passage des Déportés, 2, B-5030 Gembloux, Belgium;3. Centre Indépendant de Promotion Fourragère (CIPF-ASBL), Université Catholique de Louvain, Croix du Sud 2 boîte 3, B-1348 Louvain-la-Neuve, Belgium;4. Food is Life Care, Terra Teaching and Research Center, Gembloux Agro-Bio Tech, University of Liege, Passage des Déportés, 2, B-5030 Gembloux, Belgium;1. National Rice Research Institute (NRRI), Cuttack, India;2. International Livestock Research Institute (ILRI), Patancheru, India and Addis Ababa, Ethiopia |
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| Abstract: | The study was focused on changes in the activities of ornithine decarboxylase (ODC), lysine decarboxylase (LDC) and tyrosine decarboxylase (TyDC) in maize seedlings infested by bird cherry-oat aphid (Rhopalosiphum padi L.).Obtained results showed that the aphid infestation induced LDC activity strongly within tissues of less aphid-settled maize (Waza cv.) during the first week of the infestation in comparison to the control plants and the activity was suppressed after two weeks. However, TyDC activity fluctuated under the aphid infestation. In relation to the control, the enzyme activity was inhibited on the first day, activated after the first week and reduced again two weeks into the experiment. A significant reduction in ODC activity was also observed in seedlings of aphid-infested maize Waza cv. during the first week. In a more susceptible maize cv. (Z?ota Kar?owa), an increase in LDC and TyDC activities in relation to the control and a simultaneous decrease in ODC activity were noted after the first day of the infestation. After one week of aphid attack, TyDC activity was induced and ODC was inhibited, whereas after two weeks ODC activity was decreased with a simultaneous increase in LDC activity in the Z?ota Kar?owa seedlings. |
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| Keywords: | Maize Amino acid decarboxylases Amino acids Plant biogenic amines |
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