Navigation Links
Ripe fruit preferred
Date:11/6/2007

This release is also available in German.

Fall, the season of colors: Leaves turn red, yellow, and brown. The disappearance of the color green and the simultaneous appearance of these other colors are also signs of ripening fruit. A team led by Bernhard Krutler at the University of Innsbruck (Austria) has now determined that the breakdown of chlorophyll in ripening apples and pears produces the same decomposition products as those in brightly colored leaves. As the researchers report in the journal Angewandte Chemie, these colorless decomposition products, called nonfluorescing chlorophyll catabolytes (NCC), are highly active antioxidantsmaking them potentially very healthy.

The beautifully colored leaves of fall are a sign of leaf senescence, the programmed cell death in plants. This process causes the disappearance of chlorophyll, which is what gives leaves their green color. For a long time, no one really knew just what happens to the chlorophyll in this process. In recent years, Krutler and his team, working with the Zurich botanists Philippe Matile and Stefan Hrtensteiner, have been able to identify the first decomposition products: colorless, polar NCCs that contain four pyrrole ringslike chlorophyll and heme.

Now the Innsbruck researchers have examined the peels of apples and pears. Unripe fruits are green because of their chlorphyll. In ripe fruits, NCCs have replaced the chlorophyll, especially in the peel and the flesh immediately below it. These catabolytes are the same for apples and pears, and are also the same as those found in the leaves of the fruit trees. There is clearly one biochemical pathway for chlorophyll decomposition in leaf senescence and fruit ripening, concludes Krutler.

When chlorophyll is released from its protein complexes in the decomposition process, it has a phototoxic effect: When irradiated with light, it absorbs energy and can transfer it to other substances. For example, it can transform oxygen into a highly reactive, destructive form. As the researchers were able to demonstrate, the NCCs have an opposite effect: They are powerful antioxidants and can thus play an important physiological role for the plant. It then became apparent that NCCs are components of the diets of humans and other higher animals, and that they could thus also play a role in their systems. Other previously identified important antioxidants in the peels of fruits include the flavonoids. Thus, the saying, an apple a day keeps the doctor away seems to be true, according to Krutler.


'/>"/>

Contact: Bernhard Krutler
bernhard.kraeutler@uibk.ac.at
43-512-507-5200
John Wiley & Sons, Inc.
Source:Eurekalert

Related biology news :

1. Researchers find new taste in fruit flies: carbonated water
2. Sugary drinks, not fruit juice, may be linked to insulin
3. NIH awards researcher $1.5 million new innovator grant for fruit-fly studies of prion proteins
4. The reservoir of Marburg virus identified in a species of fruit bat
5. Chemical in red wine, fruits and vegetables stops cancer, heart disease, depending on the dose
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/6/2017)... SINGAPORE , May 5, 2017 ... has just announced a new breakthrough in biometric ... that exploits quantum mechanical properties to perform ... new smart semiconductor material created by Ram Group ... across finance, entertainment, transportation, supply chains and security. ...
(Date:4/18/2017)... a global expert in SoC-based imaging and computing solutions, has developed ... the company,s hybrid codec technology. A demonstration utilizing TeraFaces ® , ... showcased during the upcoming Medtec Japan at Tokyo Big Sight April ... Vegas Convention Center April 24-27. ... Click here for an image of the M820 ...
(Date:4/13/2017)... According to a new market research report "Consumer IAM Market by ... Service, Authentication Type, Deployment Mode, Vertical, and Region - Global Forecast to ... USD 14.30 Billion in 2017 to USD 31.75 Billion by 2022, at ... ... MarketsandMarkets Logo ...
Breaking Biology News(10 mins):
(Date:9/18/2017)... , Sept. 18, 2017   Montrium , a growing leader ... exciting new partnership with a groundbreaking non-profit research organization, Multidisciplinary ... ... psychotherapy studies for PTSD ... recently granted Breakthrough Therapy Designation to MDMA for the treatment of ...
(Date:9/14/2017)... ... September 14, 2017 , ... ... scientist program (FSP)-- a flexible business approach similar to a full-time equivalent ... extensive project-based analytical and solid-state chemistry services and expertise with flexible extended ...
(Date:9/14/2017)... Australia (PRWEB) , ... September 14, 2017 , ... ... first viscoelastic Freedom Lumbar Disc case in Australia. Dr. Steven Yang completed the ... pain as a result of a degenerative lumbar disc at level L5-S1. The ...
(Date:9/13/2017)... , ... September 13, 2017 , ... ... the life sciences industry to improve patient outcomes and quality of life for ... impurities, has been named a US expert to the International Standards Organization/Technical ...
Breaking Biology Technology: