Features of crossing-over in virus-infected tomato

2006 ◽  
Vol 1 (3) ◽  
pp. 386-398 ◽  
Author(s):  
Gheorghe Chiriac ◽  
Larisa Andronic ◽  
Valeriu Bujoreanu ◽  
Liliana Marii
Keyword(s):  
Virus Infection ◽  
Viral Infection ◽  
Tobacco Mosaic Virus ◽  
Host Plant ◽  
Mosaic Virus ◽  
Potato Virus X ◽  
Crossing Over ◽  
Plant Genotype ◽  
Tomato Aspermy Virus ◽  
Infected Tomato

AbstractThe evidence of increased crossing over rate in tomato hybrids infected with TAV (Tomato aspermy virus), PVX (Potato virus X), TMV (Tobacco mosaic virus), TMV+PVX indicates the recombinogenic effect of viral infection. Cytological studies of the early diakinesis in healthy and virus-infected tomato revealed significant changes in chiasma number and position. The most significant changes were established for bivalents with two interstitial chiasmata and with one terminal and one interstitial. The data obtained indicate redistribution of the chiasmata position and induction of additional exchanges. The virus-induced recombination is segment-specific and depends on the host plant genotype, virus infection and the interaction between them.

scholarly journals Dinamica răspunsului antioxidativ la tomatele cu diferit tip de interacțiune cu agentul viral

2020 ◽  
Author(s):  
Liliana Mărîi ◽  
◽  
Larisa Andronic ◽  
Svetlana Smerea ◽  
Irina Erhan ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Viral Infection ◽  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Infection Process ◽  
Defensive Response ◽  
Peroxide Content ◽  
Tomato Aspermy Virus ◽  
Healthy Control ◽  
Tomato Genotypes

The defensive response of 4 tomato genotypes to Tobacco Mosaic Virus or Tomato Aspermy Virus was evaluated according to 3 indices - peroxidase and catalase activities and hydrogen peroxide content. The response was differentiated according to the applied viral infection, the genotype and dynamics of the infection process. Particularities have been attested in the reaction of the antioxidative response at different stages of the pathogenesis - increasing or decreasing of the evaluated indices compared to the healthy control.

scholarly journals Turnip mosaic virus P1 suppresses JA biosynthesis by degrading cpSRP54 that delivers AOCs onto the thylakoid membrane to facilitate viral infection

2021 ◽  
Vol 17 (12) ◽  
pp. e1010108
Author(s):  
Mengfei Ji ◽  
Jinping Zhao ◽  
Kelei Han ◽  
Weijun Cui ◽  
Xinyang Wu ◽  
...  
Keyword(s):  
Viral Infection ◽  
Mosaic Virus ◽  
Thylakoid Membrane ◽  
Potato Virus X ◽  
Turnip Mosaic Virus ◽  
Common Mechanism ◽  
Allene Oxide ◽  
Mild Mosaic ◽  
Mild Mosaic Virus ◽  
Infection Interaction

Jasmonic acid (JA) is a crucial hormone in plant antiviral immunity. Increasing evidence shows that viruses counter this host immune response by interfering with JA biosynthesis and signaling. However, the mechanism by which viruses affect JA biosynthesis is still largely unexplored. Here, we show that a highly conserved chloroplast protein cpSRP54 was downregulated in Nicotiana benthamiana infected by turnip mosaic virus (TuMV). Its silencing facilitated TuMV infection. Furthermore, cpSRP54 interacted with allene oxide cyclases (AOCs), key JA biosynthesis enzymes, and was responsible for delivering AOCs onto the thylakoid membrane (TM). Interestingly, TuMV P1 protein interacted with cpSRP54 and mediated its degradation via the 26S proteosome and autophagy pathways. The results suggest that TuMV has evolved a strategy, through the inhibition of cpSRP54 and its delivery of AOCs to the TM, to suppress JA biosynthesis and enhance viral infection. Interaction between cpSRP54 and AOCs was shown to be conserved in Arabidopsis and rice, while cpSRP54 also interacted with, and was degraded by, pepper mild mosaic virus (PMMoV) 126 kDa protein and potato virus X (PVX) p25 protein, indicating that suppression of cpSRP54 may be a common mechanism used by viruses to counter the antiviral JA pathway.

scholarly journals Effect of Yeast CTA1 Gene Expression on Response of Tobacco Plants to Tobacco Mosaic Virus Infection

2002 ◽  
Vol 129 (3) ◽  
pp. 1032-1044 ◽  
Author(s):  
Andrzej Talarczyk ◽  
Magdalena Krzymowska ◽  
Wojciech Borucki ◽  
Jacek Hennig
Keyword(s):  
Gene Expression ◽  
Virus Infection ◽  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Tobacco Plants ◽  
Tobacco Mosaic Virus Infection ◽  
Mosaic Virus Infection
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