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    ARTICLE

    Changes in the corpora allata and epidermal proliferation along the fourth instar of the Chagas disease vector Triatoma infestans

    JORGE R. RONDEROS

    BIOCELL, Vol.33, No.3, pp. 149-154, 2009, DOI:10.32604/biocell.2009.33.149

    Abstract Triatoma infestans, a blood-feeding insect, synchronises physiological mechanisms leading to moult with food intake. Since the corpora allata are important in moult and metamorphosis regulation, we have studied morphological changes in 4th instar nymphs (gland size, cell density, percent of animals showing mitoses and cell size). Changes were correlated with the effect of precocene II, epidermal proliferation, and with the extent of the “head critical period”. Based on morphological grounds, three stages can be defined in the gland along the 4th instar: Stage 1 (days 0-2 after feeding) showed small corpora allata, composed by a small number… More >

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