Navigation Links
Genes from sweet pepper to fortify African banana against devastating wilt disease

DAR ES SALAAM, TANZANIA (6 August 2010)In a major breakthrough, crop scientists announced today the successful transfer of green pepper genes to bananas, conferring on the popular fruit the means to resist one of the most devastating diseases of bananas in the Great Lakes region of Africa.

The Banana Xanthomonas Wilt (BXW) costs banana farmers about half a billion dollars worth of damage every year across East and Central Africa. The leaves of affected crops turn yellow and then wilt, and the fruit ripens unevenly and before its time. Eventually the entire plant withers and rots.

Dr. Leena Tripathi, a biotechnologist with International Institute of Tropical Agriculture (IITA) and lead author of the paper, said there is still a long way to go before the transgenic bananas find their way onto farmers' fields, but she called the breakthrough "a significant step in the fight against the deadly banana disease."

The transformed bananas, newly-infused with one of two proteins from the green pepper, have shown strong resistance to Xanthomonas wilt in the laboratory and in screen houses. The researchers are poised to begin confined field trials in Uganda soon.

Some of the findings on the protective impact of the two proteinsplant ferredoxin-like amphipathic protein (Pflp) and hypersensitive response-assisting protein (Hrap)were published recently in the journal Molecular Plant Pathology.

"The Hrap and Pflp genes work by rapidly killing the cells that come into contact with the disease-spreading bacteria, essentially blocking it from spreading any further," Tripathi said. "Hopefully, this will boost the arsenal available to fight BXW and help save millions of farmers' livelihoods in the Great Lakes region."

The novel green pepper proteins that give crops enhanced resistance against deadly pathogens can also provide effective control against other BXW-like bacterial diseases in other parts of the world. Tripathi adds that the mechanism known as Hypersensitivity Response also activates the defenses of surrounding and even distant uninfected banana plants leading to a systemic acquired resistance.

Scientists from the IITA and the National Agricultural Research Organisation (NARO) of Uganda, in partnership with African Agricultural Technology Foundation (AATF), will soon begin evaluating these promising new banana lines under confined field trials. The Ugandan National Biosafety Committee recently approved the tests, which can now move forward.

The genes used in this research were acquired under an agreement from the Academia Sinica in Taiwan.

The highly destructive BXW affects all varieties, including the East African Highland bananas and exotic dessert, roasting, and beer bananas. The crop is also under threat from another deadly disease, the banana bunchy top.

Dr. Tripathi says that there are presently no commercial chemicals, biocontrol agents or resistant varieties that can control the spread of BXW. "Even if a source of resistance is identified today," Tripathi said, "developing a truly resistant banana through conventional breeding would be extremely difficult and would take years, even decades, given the crop's sterility and its long gestation period."

BXW was first reported in Ethiopia 40 years ago on Ensete, a crop relative of banana, before it moved on to bananas. Outside of Ethiopia, it was first reported in Uganda in 2001, then rapidly spread to the Democratic Republic of Congo, Rwanda, Kenya, Tanzania, and Burundi, leaving behind a trail of destruction in Africa's largest banana producing and consuming region.

BXW can be managed by de-budding the banana plant (removing the male bud as soon as the last hand of the female bunch is revealed) and sterilizing farm implements used. However, the adoption of these practices has been inconsistent at best as farmers believe that de-budding affects the quality of the fruit and sterilizing farm tools is a tedious task.

The research to fortify bananas against BXW using genes from sweet pepper was initiated in 2007.


Contact: Jeffrey T. Oliver
Burness Communications

Related biology news :

1. The taste of quinine: Its in your bitter genes
2. Important clue to understanding the pathogenesis of ciliary disorders
3. Disease genes that followed the Silk Road identified
4. Divide and conquer: Genes decide who wins in the bodys battle against cancer
5. What plant genes tell us about crop domestication
6. Maternal diet and genes interact to affect heart development
7. Wallabies and bats harbor fossil genes from the most deadly family of human viruses
8. Virgin olive oil and a Mediterranean diet fight heart disease by changing how our genes function
9. Jumping genes find new homes in humans more often than previously thought
10. From bark to bedside: Study looks at canine cancer genes, human health impact
11. How the wrong genes are repressed: New finding from UCL
Post Your Comments:
(Date:11/4/2015)... , November 4, 2015 ... market report published by Transparency Market Research "Home Security Solutions ... and Forecast 2015 - 2022", the global home security solutions ... bn by 2022. The market is estimated to expand ... from 2015 to 2022. Rising security needs among customers ...
(Date:10/29/2015)... 2015   MedNet Solutions , an innovative SaaS-based ... clinical research, is pleased to announce that it has ... as one of only three finalists for a ... and Growing" category. The Tekne Awards honor Minnesota ... technology innovation and leadership. iMedNet™ eClinical ...
(Date:10/29/2015)... Va. , Oct. 29, 2015 Daon, ... today that it has released a new version of ... customers in North America have ... IdentityX v4.0 also includes a FIDO UAF certified ... are already preparing to activate FIDO features. These customers ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... , Nov. 25, 2015 /PRNewswire/ - Aeterna Zentaris ... that its business and prospects remain fundamentally strong ... Zoptrex™ (zoptarelin doxorubicin) recently received DSMB recommendation to ... completion following review of the final interim efficacy ... 2 Primary Endpoint in men with heavily pretreated ...
(Date:11/25/2015)... PORTLAND, Oregon , November 25, 2015 /PRNewswire/ ... Deep Market Research Report is a professional and ... Genomics industry.      (Logo: ... basic overview of the industry including definitions, classifications, ... analysis is provided for the international markets including ...
(Date:11/24/2015)... ... 24, 2015 , ... The United States Golf Association (USGA) today announced Dr. ... Award. Presented annually since 1961, the USGA Green Section Award recognizes an individual’s distinguished ... , Clarke, of Iselin, N.J., is an extension specialist of turfgrass pathology in ...
(Date:11/24/2015)... VANCOUVER , Nov. 24, 2015 /CNW/ - iCo ... ICOTF), today reported financial results for the quarter ... are expressed in Canadian dollars and presented under ... the United States ," said Andrew ... "These advancements regarding iCo-008 are not only value ...
Breaking Biology Technology: