How is papaya virus-resistant made?
How is papaya virus-resistant made?
The papaya ringspot virus (PRSV), like all viruses, is made of RNA surrounded by a protein coat or capsid. Once PRSV attaches to a papaya cell, the virus releases its RNA into the host cell where the RNA encodes one large protein. That protein is then broken into smaller proteins, all of which have different functions.
What type of virus is a genetically modified papaya resistant to?
A successful case using genetic transformation to improve resistance against a disease is the case of transgenic papaya (Carica papaya) resistant to Papaya ringspot virus (PRSV). PRSV is a potyvirus that is primarily transmitted by aphids.
How can papaya virus be controlled?
Like other potyviruses, PRSV is transmitted in a nonpersistent manner by several species of aphids. Genetically engineered (GE) papaya has been used to successfully control the disease caused by PRSV in Hawaii.
What is the name of the disease that threatened the papaya population before genetic modification and what are its symptoms?
| Papaya ringspot virus | |
|---|---|
| Symptoms of PRSV on Papaya tree (a) and fruit (b) | |
| Virus classification | |
| (unranked): | Virus |
| Realm: | Riboviria |
Are there any transgenic papaya that are virus resistant?
Transgenic line 55-1 of Sunset was inbred to homozygosity for the single copy coat protein gene and named SunUp. The Rainbow cultivar was developed to create a virus-resistant, transgenic yellow-fleshed papaya to replace virus-susceptible Kapoho.
Is there a transgenic papaya plant in Hawaii?
Six years have transpired since the commercialization of the transgenic papaya. In this article, we describe the successful performance of the transgenic papaya in Hawaii, its impact, and challenges facing Hawaii’s papaya industry.
Why was PRSV a threat to the papaya industry?
By the 1970s, Puna was producing 95% of the state’s papaya. However, PRSV was a real threat because the virus had established itself in back yards of homes in the town of Hilo which was only about 19 miles away from the Puna production area.
How are papaya seeds bad for your health?
More research is needed to understand how the benzyl isothiocyanate found in a single serving of papaya seeds could affect human health. Animal and test-tube studies have found that compounds in papaya seeds may reduce fertility and have toxic effects on cells and DNA when administered in concentrated amounts.