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J Insect Sci

Title:		Induced senescence promotes the feeding activities and nymph development of Myzus persicae (Hemiptera: Aphididae) on potato plants
Author(s):		Machado-Assefh CR; Lucatti AF; Alvarez AE;
Address:		"Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), CCT-Salta, Av. Bolivia 5150, 4400 Salta, Argentina Catedra de Quimica Biologica, Facultad de Ciencias Naturales, Universidad Nacional de Salta (UNSa). Avda. Bolivia 5150. CP 4400. Salta, Argentina. Catedra de Quimica Biologica, Facultad de Ciencias Naturales, Universidad Nacional de Salta (UNSa). Avda. Bolivia 5150. CP 4400. Salta, Argentina. Catedra de Quimica Biologica, Facultad de Ciencias Naturales, Universidad Nacional de Salta (UNSa). Avda. Bolivia 5150. CP 4400. Salta, Argentina alvareza@natura.unsa.edu.ar"
Journal Title:		J Insect Sci
Year:		2014
Volume:		20140101
Issue:
Page Number:		155 -
DOI:		10.1093/jisesa/ieu017
ISSN/ISBN:		1536-2442 (Electronic) 1536-2442 (Linking)
Abstract:		"The effect of dark-induced senescence on Solanum tuberosum L. (Solanales: Solanaceae) plants was assessed on the feeding behavior and performance of the green peach aphid, Myzus persicae Sulzer (Hemiptera: Aphididae). Senescence was induced by covering the basal part of the plant with a black cloth for 5 d, avoiding the light passage, but keeping the apical buds uncovered. The basal part of control plants was covered with a white nonwoven cloth. The degree of senescence was determined by measuring the chlorophyll content of the covered leaves. The performance and feeding behavior of M. persicae were studied on the uncovered nonsenescent apical leaves. The aphid's performance was evaluated by measuring nymphal mortality and prereproductive time. Aphid feeding behavior was monitored by the electrical penetration graph technique. In plants with dark-induced senescence, the aphids showed a reduction in their prereproductive time. Aphids also spent more time ingesting sap from the phloem than in control plants and performed more test probes after the first sustained ingestion of phloem sap. These data suggest that M. persicae's phloem activities and nymph development benefit from the nutritional enrichment of phloem sap, derived from dark-induced senescence on potato plants. The induced senescence improved plant acceptance by M. persicae through an increase in sap ingestion that likely resulted in a reduction in developmental time"
Keywords:		Animals Aphids/*physiology Chlorophyll/analysis Herbivory/*physiology Nymph/growth & development Solanum tuberosum/*physiology Solanum tuberosum electrical penetration graph green peach aphid;
Notes:		"MedlineMachado-Assefh, Cristina R Lucatti, Alejandro F Alvarez, Adriana E eng Research Support, Non-U.S. Gov't 2014/11/17 J Insect Sci. 2014 Jan 1; 14:155. doi: 10.1093/jisesa/ieu017. Print 2014"