[PDF] Regeneration Of Capsicum Annuum And Screening Of The R1 Generation For Resistance To Cucumber Mosaic Virus And A Survey Of Pepper Viruses In Michigan eBook

Author : S. K. Green
Publisher :
Page : 68 pages
File Size : 20,85 MB
Release : 1991
Category : Peppers
ISBN :

GET BOOK

Filamentous viruses; Rod-Shaped viruses; Isometric viruses; Geminiviruses; Tomato spotted wilt virus group; Other viruses; Control measures.

Author : S. K. Green
Publisher : Agribookstore/Winrock
Page : 76 pages
File Size : 20,5 MB
Release : 1994
Category : Technology & Engineering
ISBN :

GET BOOK

Viruses reported to infect pepper.

Author : Maliheh Safari
Publisher :
Page : pages
File Size : 41,9 MB
Release : 2017
Category :
ISBN :

GET BOOK

There are many non-pathogenic viruses that are maintained in a persistent lifestyle in plants. Plant persistent viruses are widespread, replicating in their hosts for many generations. The roles of plant persistent viruses have not been studied thoroughly, but their very long-term relationships with their hosts, and their high level of vertical transmission imply beneficial interactions. So far, Endornaviridae is the only family with a single-stranded RNA genome, containing one large open reading frame. Bell pepper endornavirus (BPEV), Hot pepper endornavirus, Capsicum frutescens endornavirus 1 (CFEV 1) have been identified from peppers. Peppers are native to Central and South America, and as domesticated plants human selection accelerated their evolution. Using a collection of 97 different peppers the evolution of pepper persistent viruses was studied. The evolution of endornaviruses in different peppers was investigated using two fragments from the viral helicase (Hel) and RNA dependent RNA polymerase (RdRp) domains. In addition, by using single nucleotide polymorphisms the pepper host populations and phylogenies were analyzed. The endornaviruses phylogeny was correlated with its Capsicum species host. In this study BPEV was limited to C. annuum species, and the RdRp and Hel phylogenies identified two clades that correlated with the host pungency. No C. annuum infected with CFEV 1 was found in this study, but the CFEV 1 RdRp fragment was recovered from C.chinense, C. frutescens, and C.bacccutum and C. pubescens.Partitiviridae is the most common persistent virus family in wild plants. Jalapeo and Hungarian Wax peppers (Capsicum annuum) have been reported with Pepper cryptic virus 1 (PCV 1) and Pepper cryptic virus 2 (PCV 2), respectively. Both viruses belong to the genus Deltapartitivirus from Partitiviridae family. The evolution of PCV 1 and PCV 2 was investigated using the RdRp and coat protein of both viruses. Both viruses were detected in cultivated and wild peppers. It is shown that these viruses have a remarkably slow evolution rate in comparison with acute RNA viruses. This might be correlated with the strong purifying selection related to the lifestyle of theses viruses, or the replication strategies in double stranded RNA viruses, that use a stamping machine mode of replication. Finally, some potential beneficial effects of persistent virus were examined. In wild plants partitivirus infection decreased the likelihood of acute virus infection. I compared the effect of odor cues from PCV 1 infected (J+) and virus free (J-) Jalapeo pepper on the aphid Myzus periscae, a common vector of acute plant viruses. Pairwise preference experiments showed a stark contrast to insect-plant interactions in acute virus infections: virus infected plants deterred aphids. The acute plant virus Cucumber mosaic virus (CMV) manipulates its host's volatile emission to attract aphid vectors and facilitate its transmission. Volatiles of J+ and J- CMV infected plants were more attractive to aphids than J+ and J- mock inoculated plants. However, in pairwise preference between J+ CMV- and J- CMV-infected plants, aphids preferred the J- CMV volatile blend. Also, aphid fecundity on J+ and J- plants was measured as an indicator for the effect of PCV 1 on host quality for aphids. Aphid reproduction on J+ plants was more than two fold lower than J- plants. This study demonstrates a beneficial relationship between PCV 1 and Jalapeo plants by protecting the plants from the vector of acute viruses. In addition, the effect of PCV 1 on the Jalapeo's developmental growth was tested by measuring the average time required for seed germination, emergence of first true leaf, first open flower and dried biomass of plants. PCV 1 showed no significant effect on the developmental growth of Jalapeo plants.

Author : Roberto Fritsche-Neto
Publisher : Springer Science & Business Media
Page : 166 pages
File Size : 24,73 MB
Release : 2012-10-01
Category : Science
ISBN : 3642330878

GET BOOK

Experience shows that biotic stresses occur with different levels of intensity in nearly all agricultural areas around the world. The occurrence of insects, weeds and diseases caused by fungi, bacteria or viruses may not be relevant in a specific year but they usually harm yield in most years. Global warming has shifted the paradigm of biotic stresses in most growing areas, especially in the tropical countries, sparking intense discussions in scientific forums. This book was written with the idea of collecting in a single publication the most recent advances and discoveries concerning breeding for biotic stresses, covering all major classes of biotic challenges to agriculture and food production. Accordingly, it presents the state-of-the-art in plant stresses caused by all microorganisms, weeds and insects and how to breed for them. Complementing Plant Breeding for Abiotic Stress Tolerance, this book was written for scientists and students interested in learning how to breed for biotic stress scenarios, allowing them to develop a greater understanding of the basic mechanisms of resistance to biotic stresses and develop resistant cultivars.

Author : Hugo Campos
Publisher : Springer Nature
Page : 524 pages
File Size : 13,21 MB
Release : 2019-12-03
Category : Science
ISBN : 3030286835

GET BOOK

This book is open access under a CC BY 4.0 license. This book provides a fresh, updated and science-based perspective on the current status and prospects of the diverse array of topics related to the potato, and was written by distinguished scientists with hands-on global experience in research aspects related to potato. The potato is the third most important global food crop in terms of consumption. Being the only vegetatively propagated species among the world’s main five staple crops creates both issues and opportunities for the potato: on the one hand, this constrains the speed of its geographic expansion and its options for international commercialization and distribution when compared with commodity crops such as maize, wheat or rice. On the other, it provides an effective insulation against speculation and unforeseen spikes in commodity prices, since the potato does not represent a good traded on global markets. These two factors highlight the underappreciated and underrated role of the potato as a dependable nutrition security crop, one that can mitigate turmoil in world food supply and demand and political instability in some developing countries. Increasingly, the global role of the potato has expanded from a profitable crop in developing countries to a crop providing income and nutrition security in developing ones. This book will appeal to academics and students of crop sciences, but also policy makers and other stakeholders involved in the potato and its contribution to humankind’s food security.