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Alfalfa leaf curl virus is transmitted by Aphis craccivora in a highly specific circulative manner
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Abstract
Two members of the genus Capulavirus (Geminiviridae) are transmitted by aphids including Alfalfa leaf curl virus (ALCV) transmitted by
Aphis craccivora
. The capulavirus Euphorbia caput-medusae latent virus was shown here to be transmitted also by
A. craccivora
, using the population EuphorbiaSA. ALCV was transmissible by several
A. craccivora
populations including Robinia, but not EuphorbiaSA, reflecting a high transmission specificity. ALCV accumulation and localization were analyzed in whole insects, midguts, hemolymphs, and heads of aphids from both populations and from the non-vector species
Acyrthosiphon pisum
. A 6-day persistence was observed in
A. craccivora
populations but not in
A. pisum
. Vector and non-vector
A. craccivora
populations could be distinguished by contrasted virus accumulations and midgut intracellular localization. Results confirm that ALCV is transmitted according to a circulative-persistent mode, and are consistent with a gut barrier to the transmission of ALCV in
A. pisum
and a primary salivary gland barrier in
A. craccivora
.
Title: Alfalfa leaf curl virus is transmitted by
Aphis craccivora
in a highly specific circulative manner
Description:
Abstract
Two members of the genus Capulavirus (Geminiviridae) are transmitted by aphids including Alfalfa leaf curl virus (ALCV) transmitted by
Aphis craccivora
.
The capulavirus Euphorbia caput-medusae latent virus was shown here to be transmitted also by
A.
craccivora
, using the population EuphorbiaSA.
ALCV was transmissible by several
A.
craccivora
populations including Robinia, but not EuphorbiaSA, reflecting a high transmission specificity.
ALCV accumulation and localization were analyzed in whole insects, midguts, hemolymphs, and heads of aphids from both populations and from the non-vector species
Acyrthosiphon pisum
.
A 6-day persistence was observed in
A.
craccivora
populations but not in
A.
pisum
.
Vector and non-vector
A.
craccivora
populations could be distinguished by contrasted virus accumulations and midgut intracellular localization.
Results confirm that ALCV is transmitted according to a circulative-persistent mode, and are consistent with a gut barrier to the transmission of ALCV in
A.
pisum
and a primary salivary gland barrier in
A.
craccivora
.
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Alfalfa leaf curl virus is efficiently acquired by its aphid vector
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but inefficiently transmitted
Alfalfa leaf curl virus is efficiently acquired by its aphid vector
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but inefficiently transmitted
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