Nav: Home

New study 'sheds light' on sun's role in mitigating fungal disease of mango fruit

November 14, 2017

St. Paul, Minn. (November 2017)--Mango fruits play host to some economically damaging fungal diseases, especially during ripening and storage; but mango growers and suppliers have a new ray of hope...in the form of sunlight.

In a recent Phytobiomes journal article, Noam Alkan and colleagues at the Agricultural Research Organization, Volcani Center in Israel show some promising new research that explores the role of sunlight in boosting the levels of beneficial microorganisms in mango fruits to combat stem end rot.

The research, discussed through their article titled, "Microbiome Alterations Are Correlated with Occurrence of Postharvest Stem-End Rot in Mango Fruit," offers a detailed account of their study.

Diskin and colleagues showed that high sunlight exposure in an orchard has the effect of turning the mango's skin red. Mango fruits with less sunlight exposure remain green. Using a novel deep sequencing technique, they studied the dynamics in the microbial and fungal community inside the stem end tissues of both red and green mango fruits during storage.

They found that both fungal and bacterial community changes were dependent on fruit peel color, storage duration, and storage temperature.

The pathogens commonly associated with stem end rot, Alternaria alternata and Lasiodiplodia theobromae, colonize the phloem of the fruit's stem end. As the fruit ripen, they switch to a pathogenic stage and branch into the fruit's softer internal tissue. Colonies of yeast, bacteria, and other fungi that do not cause symptoms were also found.

"Interestingly, exposure to sunlight in the orchard contributed to a 'healthier composition' of fungi and bacteria communities and therefore reduced postharvest rots, while long storage reduced the community variation and led to more pathogenic fungi and rots," said Alkan. "Thus, in fruit that were not exposed to sunlight or in fruits stored for long period, we found an increase in specific pathogenic fungi and an increase in bacteria that are known to degrade fungal cell walls."

The researchers also discovered a diverse and dynamic microbial communities that not only contained pathogenic microorganisms but beneficial ones that one day could be used in agriculture, the food industry and biomedicine.

"This is one of the first articles to offer a deep insight into microbiome of harvested fruits," said Alkan. "We believe that healthier microbial composition is going to be a major topic of interest to everyone dealing with food safety and food waste in the near future."
-end-


American Phytopathological Society

Related Bacteria Articles:

Conducting shell for bacteria
Under anaerobic conditions, certain bacteria can produce electricity. This behavior can be exploited in microbial fuel cells, with a special focus on wastewater treatment schemes.
Controlling bacteria's necessary evil
Until now, scientists have only had a murky understanding of how these relationships arise.
Bacteria take a deadly risk to survive
Bacteria need mutations -- changes in their DNA code -- to survive under difficult circumstances.
How bacteria hunt other bacteria
A bacterial species that hunts other bacteria has attracted interest as a potential antibiotic, but exactly how this predator tracks down its prey has not been clear.
Chlamydia: How bacteria take over control
To survive in human cells, chlamydiae have a lot of tricks in store.
Stress may protect -- at least in bacteria
Antibiotics harm bacteria and stress them. Trimethoprim, an antibiotic, inhibits the growth of the bacterium Escherichia coli and induces a stress response.
'Pulling' bacteria out of blood
Magnets instead of antibiotics could provide a possible new treatment method for blood infection.
New findings detail how beneficial bacteria in the nose suppress pathogenic bacteria
Staphylococcus aureus is a common colonizer of the human body.
Understanding your bacteria
New insight into bacterial cell division could lead to advancements in the fight against harmful bacteria.
Bacteria are individualists
Cells respond differently to lack of nutrients.

Related Bacteria Reading:

A Field Guide to Bacteria (Comstock Book)
by Betsey Dexter Dyer (Author)

Bacteria: Staph, Strep, Clostridium, and Other Bacteria (Class of Their Own (Paperback))
by Judy Wearing (Author)

I Contain Multitudes: The Microbes Within Us and a Grander View of Life
by Ed Yong (Author)

Molecular Genetics of Bacteria, 4th Edition
by Larry Snyder (Author), Joseph E. Peters (Author), Tina M. Henkin (Author), Wendy Champness (Author)

The Bacteria Book: The Big World of Really Tiny Microbes
by Steve Mould (Author)

The Surprising World of Bacteria with Max Axiom, Super Scientist (Graphic Science)
by Agnieszka Biskup (Author), Anne Timmons (Author), Matt Webb (Author), Krista Ward (Author)

Bacteria: A Very Short Introduction (Very Short Introductions)
by Sebastian G.B. Amyes (Author)

Basic Medical Microbiology
by Patrick R. Murray PhD (Author)

From Bacteria to Bach and Back: The Evolution of Minds
by HighBridge, a Division of Recorded Books

Are All Bacteria Dangerous? Biology Book for Kids | Children's Biology Books
by Baby Professor (Author)

Best Science Podcasts 2018

We have hand picked the best science podcasts for 2018. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Dying Well
Is there a way to talk about death candidly, without fear ... and even with humor? How can we best prepare for it with those we love? This hour, TED speakers explore the beauty of life ... and death. Guests include lawyer Jason Rosenthal, humorist Emily Levine, banker and travel blogger Michelle Knox, mortician Caitlin Doughty, and entrepreneur Lux Narayan.
Now Playing: Science for the People

#492 Flint Water Crisis
This week we dig into the Flint water crisis: what happened, how it got so bad, what turned the tide, what's still left to do, and the mix of science, politics, and activism that are still needed to finish pulling Flint out of the crisis. We spend the hour with Dr Mona Hanna-Attisha, a physician, scientist, activist, the founder and director of the Pediatric Public Health Initiative, and author of the book "What the Eyes Don't See: A Story of Crisis, Resistance, and Hope in an American City".