• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Mémoire de Maîtrise
DOI
https://doi.org/10.11606/D.11.2019.tde-20191218-142008
Document
Auteur
Nom complet
Ieda Maria Perlis Lotz
Unité de l'USP
Domain de Connaissance
Date de Soutenance
Editeur
Piracicaba, 1995
Directeur
Titre en portugais
Reação de Cucurbita pepo e C. moschata a infecção mista do vírus do mosaico do mamoeiro-estirpe melancia com o vírus do mosaico da melancia-2 ou com o vírus do mosaico amarelo da abobrinha
Mots-clés en portugais
ABOBORA CHEIROSA
ABOBORA MORANGA
MOSAICO
POTYVIRUS
VÍRUS DE PLANTAS
Resumé en portugais
Avaliou-se os efeitos das infecções mistas do VMM-Me com O VMAA ou com o VMMe-2 nas cvs. Caserta e Piramoita. Foram conduzidos 4 experimentos sendo cada um com 10 tratamentos. Os tratamentos foram: 1. Inoculação simples com o VMM-Me; 2. Inoculação simples com o VMAA (ou VMMe-2); 3. Inoculação simultânea dos vírus; 4, 5 e 6. Inoculações com o VMM-Me seguidas pelo VMAA (ou VMMe- 2) com intervalos de 24, 48 e 72 h, respectivamente; 7, 8 e 9. Inoculação com o VMAA (ou VMMe-2) seguidas pelo VMM-Me com intervalos de 24, 48 e 72 h, respectivamente; 10. Testemunha, sem inoculação. Aos 15 dias após inoculação foram avaliados: sintomas, área foliar, pesos seco e fresco e concentração dos vírus através do ELISA-indireto. Os resultados mostraram que o genótipo do hospedeiro, o intervalo de tempo e a ordem das inoculações influenciaram a sintomatologia reduzindo a área foliar e alterando a concentração dos vírus VMMe-2 e do VMAA nas plantas quando inoculadas em infecções mistas com o VMM-Me. Nas infecções mistas avaliadas a interação tipo antagonismo foi a mais frequente. A infecção simples pelo VMAA foi a mais severa quando comparada com as infecções mistas. O VMM-Me apresentou concentrações de partículas superiores aos outros dois vírus, apresentando maior velocidade na replicação nestes hospedeiros
Titre en anglais
Reaction of Cucurbita pepo e C. moschata tomlxed infection of papaya ringspot virus-W (PRSV -W) with watermelon mosaic virus-2 (WMV-2) or with zucchini yellow mosaic virus (ZYMV)
Resumé en anglais
Multiple resistance to PRSV-W, WMV-2 and ZYMV is a priority for squash and summer squash breeding. This present research look for an explanation of PRSV-W interations with WMV-2 and ZYMV, in Cucurbita sp. to support further squash breeding for virus resistence. The effects· of mixed infections by PRSV-W with ZYMV or with WMV-2, was elaluated on young plants of cv. Caserta (Cucurbita pepo) and cv. Piramoita (Cucurbita moschata). Four experiments were carried out in greenhouses and each experiment cosisted of 10 treatments and 12 repetitions. The treatments were: 1. Single inoculation with PRSV-W; 2. Single inoculation with WMV -2 (or ZYMV); 3. Simultaneous inoculation with PRSV -W and WMV-2 (or ZYMV); 4, 5 and 6. Mixed inoculations of PRSV-W before WMV-2 (or ZYMV) with 24, 48 and 72 h. of the intervals between inoculations (respectively); 7, 8 and 9. Mixed inoculations of WMV-2 (or ZYMV) before PRVS-W with 24, 48 and 72 h. of the intervals between inoculations (respectively); 10. Health controI. It was evalueted symptoms, foliar area, fresh and dry weight of leaves and viral concentration throught inderect-ELISA fifteen days after inoculation. The results showed that genotype, time interval and inoculations sequence influence symptoms, reduction foliar area and viral concentration of WMV -2 and ZYMV in mixed inoculated plants with PRSV-W. The antagonism was the most frequent effect observed in the double inoculations. The ZYMV was more severe than PRSV-W or WMV-2. PRSV-W showed higher viral concentration tahn the ZYMV or WMV-2, with faster replication. Symptoms severity were directily proporcional to reduction of foliar area in all treatments in both cultivars. Foliar area reduction was an excellent parameter to evaluate severity degree in the infected host. Cv. Piramoita tolerance to PRSV-W, was confirmed, although viral concentration was higher than in cv. Caserta, considered to be highly sensitive to PRSV-W. The antagonism effect on cv. Caserta concerning viral concentration and foliar area was observed when PRSV-W inoculations preceded ZYMV or WMV-2 inoculations. No antagonism was observed when WMV-2 or ZYMV inoculations preceded PRSV-W. Mixed infections of WMV-2 inoculations preceded by PRSV-W at 48 h. (T8) intervals inoculation on cv. Piramoita showed antagonism with PRSV-W viral concentration reduction. Both cultivars showed severe symptoms when double infected by PRSV -W with WMV-2 or with ZYMV
 
AVERTISSEMENT - Regarde ce document est soumise à votre acceptation des conditions d'utilisation suivantes:
Ce document est uniquement à des fins privées pour la recherche et l'enseignement. Reproduction à des fins commerciales est interdite. Cette droits couvrent l'ensemble des données sur ce document ainsi que son contenu. Toute utilisation ou de copie de ce document, en totalité ou en partie, doit inclure le nom de l'auteur.
Date de Publication
2019-12-19
 
AVERTISSEMENT: Apprenez ce que sont des œvres dérivées cliquant ici.
Tous droits de la thèse/dissertation appartiennent aux auteurs
CeTI-SC/STI
Bibliothèque Numérique de Thèses et Mémoires de l'USP. Copyright © 2001-2022. Tous droits réservés.