Banca de QUALIFICAÇÃO: VALDEMIR ALBUQUERQUE DA SILVA JÚNIOR

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : VALDEMIR ALBUQUERQUE DA SILVA JÚNIOR
DATE: 29/02/2024
TIME: 14:00
LOCAL: Webconferência
TITLE:

DIFFERENTIAL ADAPTABILITY BETWEEN ISOLATES OF
Bean golden mosaic virus AND Macroptilium yellow spot virus
TO HOSTS COMMON BEAN (Phaseolus vulgaris), FAVA BEAN
(P. lunatus) AND TO THE VECTOR Bemisia tabaci

KEY WORDS:

Geminiviridae, begomovirus, Bemisia tabaci

PAGES: 56
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

Among the various phytosanitary issues affecting bean crops,
begomoviruses stand out. Several species have been reported to naturally
infect these hosts, but Bean golden mosaic virus (BGMV) and
Macroptilium yellow spot virus (MaYSV) are of greater economic
importance in Brazil. Begomoviruses belong to the Geminiviridae family,
encompassing viruses with a single-stranded circular DNA genome
encapsulated in geminate icosahedral particles. These begomoviruses are
transmitted by the whitefly Bemisia tabaci and are responsible for causing
diseases of significant economic relevance in various crops, especially in
tropical and subtropical regions. The differential adaptation of BGMV and
MaYSV in bean crops remains a poorly understood aspect, requiring
further studies and research to gain a deeper understanding of this process.
In this context, the present study aimed to examine the adaptability of the
BGMV and MaYSV viruses, as well as the efficiency of their
transmission by the vector insect in common beans and fava beans.
Experiments were conducted with infectious clones of the BGMV and
MaYSV viruses in common bean and fava bean plants, using different
infection methods. The results revealed that bombardment was more
effective in establishing viral infection than agroinoculation. Plants
displaying symptoms of infection by both viruses had genomic
components DNA-A and DNA-B, while asymptomatic plants only
possessed DNA-A. In mixed infections, plants infected with both viruses
exhibited more severe symptoms compared to single infections. These
findings highlight the complexity of interactions between viruses and host
plants, providing valuable insights into the mechanisms underlying viral
infection. To address the hypothesis regarding which virus is better
adapted to both hosts, transmission experiments and viral load analysis
will be conducted.

COMMITTEE MEMBERS:
Interno(a) - 1065779 - ADRIANO MARCIO FREIRE SILVA
Externo(a) ao Programa - 3339094 - MAYRA MACHADO DE MEDEIROS FERRO - nullPresidente - 2149632 - SARAH JACQUELINE CAVALCANTI DA SILVA