Pea enation mosaic virus explained

Pea enation mosaic virus (PEMV) is really two plant pathogenic viruses. The two RNAs of the disease are now categorised as two separate, mutualistic viruses:

• Pea enation mosaic virus 1 is an Enamovirus
• Pea enation mosaic virus 2 is an Umbravirus

They are spread by green- or pea aphids and affects such legumes as pea,^[1] alfalfa, broadbean or sweet pea mostly in temperate regions.^[2]

Symptoms include chlorotic, translucent or necrotic lesions, malformation of leaves and stipules, and plant distortion. However, the most characteristic symptom is the formation of enations on the abaxial, i.e. downy, leaf side. Enations are derived from the cells of vascular bundles undergoing hyperplasia.^[3]

External links

• ICTVdB - The Universal Virus Database: Pea enation mosaic virus
• Family Groups - The Baltimore Method

Notes and References

1. Powell . CA . Zoeten GA . Replication of pea enation mosaic virus RNA in isolated pea nuclei . Proceedings of the National Academy of Sciences of the USA . 74 . 7 . 2919–2922 . July 1977 . 16592421 . 431347 . 10.1073/pnas.74.7.2919. 1977PNAS...74.2919P . free .
2. Kyseláková. Helena. 2013. Reactive oxygen and nitrogen species and hormone signalling in systemic infection of pea by Pea enation mosaic virus. Plant Protection Science. 49. 3 . 105–119. 10.17221/51/2012-PPS. free.
3. Book: Diseases of Fruits and Vegetables - Volume II: Diagnosis and S.A.M.H. Naqvi Springer. www.springer.com. 2004. 10.1007/1-4020-2607-2. 978-1-4020-1823-7. 10879942. 2016-06-17. Naqvi. S. A. M. H.