Influence of cytoplasmic heat shock protein 70 on viral infection of Nicotiana benthamiana
MOLECULAR PLANT PATHOLOGY
Authors: Chen, Zhaorong; Zhou, Tao; Wu, Xuehong; Hong, Yiguo; Fan, Zaifeng; Li, Huaifang
Abstract
The accumulation of heat shock protein 70 (Hsp70) generally occurs in plants infected with viruses. However, the effect of Hsp70 accumulation on plant viral infection and pathogenesis remains elusive. In this study, the expression of six Hsp70 genes was found to be induced by the four diverse RNA viruses, Tobacco mosaic virus, Potato virus X (PVX), Cucumber mosaic virus and Watermelon mosaic virus, in Nicotiana benthamiana. Heat treatment enhanced the accumulation and systemic infection of these viruses. Similar results were obtained for viral infection in plants heterologously expressing an Arabidopsis cytoplasmic Hsp70 through either a PVX vector or Agrobacterium infiltration. In contrast, viral infection was compromised in cytoplasmic NbHsp70c-1 gene-silenced plants. These data demonstrate that the cytoplasmic Hsp70s can enhance the infection of N. benthamiana by diverse viruses.
DETECTION OF PVY, PLRV AND PVX POTATO VIRUSES IN SOME REGIONS OF SERBIA
COMPTES RENDUS DE L ACADEMIE BULGARE DES SCIENCES
Authors: Ciric, Slavica; Cvetkovic, Gordana; Stojkovic, Slavisa; Gudzic, Slavisa
Abstract
During a one-year period, the testing of samples of seed potatoes from the territories of Moravica, Zlatibor, RaSka and Maeva districts of the Republic of Serbia was carried out. The presence of the three most important viruses: PVY, PLRV and PVX, was determined using serological DAS-ELISA test. Out of all tested samples, 34.62% were positive for some of these viruses. The greatest frequency was shown by PVY virus (86.36%), and significantly lower frequencies were shown by PLRV (11.62%) and PVX (2.02%) of all infected samples. PVY was detected in all districts, PLRV in all except Maeva district, and PVX was detected in the Moravica district, only. The results obtained indicate that the virus diseases could be one of the reasons for the lower potato yield in Serbia compared to Europe. This imposes the need for the application of integrated protection of potatoes.