Dataset Information

In search of Varroa chemosensory related proteins using transcriptomic and proteomic tools

ABSTRACT: The tight synchronization between the life cycle of the obligatory parasitic mite Varroa destructor (Varroa) and its host the honeybee, is mediated by honeybee chemical stimuli. These stimuli are mainly perceived by a pit organ located at the distal part of the mite’s foreleg. In the present study, we searched for Varroa chemosensory molecular components by comparing transcriptomic and proteomic profiles between forelegs from different physiological stages, and rear legs. In general, a comparative transcriptomic analysis showed a clear separation of the expression profiles between the rear legs and the three groups of forelegs (phoretic, reproductive and tray-collected mites). Most of the differentially expressed transcripts and proteins in the mite’s foreleg were previously uncharacterized. Using a conserved domain approach, we identified 54 transcripts with known chemosensory-related domains, of which 17 were significantly up regulated in the mite’s forelegs when compared to rear legs. We characterized the chemosensory transcripts using phylogenetic analysis.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Varroa Destructor

SUBMITTER: Meital Kupervaser

LAB HEAD: Victoria Soroker

PROVIDER: PXD010042 | Pride | 2018-11-21

REPOSITORIES: Pride

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			Action	DRS
	QEP2_6348_SVIC_1-F_2_031217.mzid.gz	Mzid
	QEP2_6348_SVIC_1-F_2_031217.mzid_QEP2_6348_SVIC_1-F_2_031217.MGF	Mzid
	QEP2_6348_SVIC_1-F_2_031217.mzid_QEP2_6348_SVIC_1-F_2_031217.pride.mgf.gz	Mzid
	QEP2_6348_SVIC_1-F_2_031217.pride.mztab.gz	Mztab
	QEP2_6348_SVIC_1-F_2_031217.raw	Raw

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Publications

Varroa chemosensory proteins: some are conserved across Arthropoda but others are arachnid specific.

Eliash N N Thangarajan S S Goldenberg I I Sela N N Kupervaser M M Barlev J J Altman Y Y Knyazer A A Kamer Y Y Zaidman I I Rafaeli A A Soroker V V

Insect molecular biology 20190101 3

The tight synchronization between the life cycle of the obligatory parasitic mite Varroa destructor (Varroa) and its host, the honeybee, is mediated by honeybee chemical stimuli. These stimuli are mainly perceived by a pit organ located on the distal part of the mite's foreleg. In the present study, we searched for Varroa chemosensory molecular components by comparing transcriptomic and proteomic profiles between forelegs from different physiological stages, and rear legs. In general, a comparat ...[more]

PMID: 30444567

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Project description:As a matter of fact, honeybees are vital for the pollination of more than 80 crops of agricultural interest. However, population decline has become an important global issue causing significant concerns among agricultural experts and the broader public. For this, parasites are known to be the major culprits responsible for the losses of millions of honeybee colonies so far. Among these parasites, Varroa destructor has been identified as a major cause for global losses in Western honeybee (Apis mellifera) colonies. Hygienic behavior (HB), on the other hand, is a collective response by adult honeybees to defend against parasites and diseases that is known to involve in resistance towards Varroosis. Even with the efforts made to elucidate the molecular mechanism underlying HB, it is still not understood. In our study, we have studied the proteomic correlates to HB using a honeybee line (selected for Varroa-specific HB for over a decade in Germany). We sampled individual worker bees from this line that showed HB after closer infrared video observations and compared the proteomes of their mushroom bodies and antennae with those of workers that came from the same set of colonies but didn't show the behaviour. Furthermore, we compared the pupal hemolymph for worker bees of the selected HB line and a control line using state-of-the art techniques of proteomics. We identified a total of 8609 proteins (covered >55% of the honeybee proteome) from these three honeybee tissues. This is the most comprehensive proteomic study of the honeybee HB to date, and the first to focus on individual bees expressing Varroa-specific HB. These results have significantly advanced our knowledge on the biology underlining HB to a new level. The uniquely found functional classes and pathways by the proteins identified in each tissue suggest that hygienic bees have shaped distinct proteome settings to underpin the HB. Moreover, during analysis of pupal hemolymph proteome, the HB-line has adapted a unique strategy to boost an individual and social immunity and drove pupal organogenesis via energy metabolism and protein biosynthesis. Moreover, in the mushroom bodies of different HB phenotypic worker bees, the hygienic bees have enhanced their neuronal sensitivity to promote the execution of HB by activation of synaptic vesicles and calcium channel activities. Moreover, in the antennae of two HB phenotypic worker bees, the hygienic bees have demonstrated strengthening of their sensitivity associated with olfactory senses and signal transmissions, which is important to input a strong signal to the mushroom bodies and initiate HB. In conclusion, our novel findings have significantly extended our understandings of the molecular mechanisms that underline the HB to combat Varroa infestation. Furthermore, we identified a wide array of novel markers that are useful for accelerating marker associated selection of HB to aid in the natural resistance to a parasite blamed for a global decline in honeybee health.