NDLI: Temporal Variation in Immune Components of the White Grub Phyllophaga polyphylla (Bates) (Coleoptera: Melolonthidae)

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Temporal Variation in Immune Components of the White Grub Phyllophaga polyphylla (Bates) (Coleoptera: Melolonthidae)

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Neotropical Entomology : Volume 44, Issue 4, August 2015

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Temporal Variation in Immune Components of the White Grub Phyllophaga polyphylla (Bates) (Coleoptera: Melolonthidae)

Content Provider	Springer Nature Link
Author	Enríquez Vara, J N Guzmán Franco, A W
Copyright Year	2015
Abstract	Ecological immunology assumes that the host immune efficiency is correlated with its survival after pathogen challenge. To test this hypothesis, we challenged Phyllophaga polyphylla (Bates) larvae with the naturally occurring fungus Metarhizium pingshaense on two consecutive years (2011 and 2012). In each year, we injected the blastospores of M. pingshaense and then used levels of prophenoloxidase (proPO), phenoloxidase (PO) and total haemolymph serum protein as indicators of immune efficiency. Larvae were injected with (1) phosphate buffered saline (PBS) + Tween and viable blastospores of M. pingshaense, (2) PBS + Tween and non-viable blastospores of M. pingshaense, (3) PBS + Tween, or (4) non-manipulated. Overall, levels of PO, proPO and total haemolymph serum protein in larvae after 12 h were similar amongst treatments within each year of collection. However, larvae collected in 2011 showed higher PO and proPO activity but lower total haemolymph serum protein compared with larvae collected in 2012. A survival study injecting viable blastospores showed that larvae collected in both years died within 48 h; however, when non-viable blastospores were injected, which were still toxic to larvae, mortality was greater in larvae collected in 2011 compared with larvae collected in 2012. Altogether, these results indicate that PO, proPO and total haemolymph serum protein do not predict immune strength of P. polyphylla against blastospores of M. pingshaense, but higher values of PO and proPO were correlated with higher survival rates against non-infective but toxic agents. The possible role of some abiotic factors over the differences observed for immune components of P. polyphylla in different years of collection is discussed.
Starting Page	466
Ending Page	473
Page Count	8
File Format	PDF
ISSN	1519566X
Journal	Neotropical Entomology
Volume Number	44
Issue Number	5
e-ISSN	16788052
Language	English
Publisher	Springer US
Publisher Date	2015-08-05
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	seasonal variation Life Sciences Immune response phenoloxidase Entomology prophenoloxidase Agriculture Metarhizium pingshaense
Content Type	Text
Resource Type	Article
Subject	Insect Science

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Temporal Variation in Immune Components of the White Grub Phyllophaga polyphylla (Bates) (Coleoptera: Melolonthidae).

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Temporal Variation in Immune Components of the White Grub Phyllophaga polyphylla (Bates) (Coleoptera: Melolonthidae)

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