Plants' circadian clocks tune into latitude to enhance fitness

HANOVER, NH Dartmouth researchers have learned that natural variations in a plant's circadian clock correlate with the plant's latitude. C. Robertson McClung, Professor of Biological Sciences and an author on the paper, and his team studied circadian behaviors of Arabidopsis plants obtained from different areas, from the Arctic Circle and middle Europe, to Japan and the Cape Verde Islands.

"Clocks are adaptive; they contribute to the fitness of an organism in any particular environment," says McClung. "We found that in species like Arabidopsis, which cover a huge environmental range, there are underlying variations in their circadian clocks to subtly optimize their ability to function in a particular environment."

Published in the November 7 issue of Science, the study examines the clock rhythms in Arabidopsis from different parts of the earth. The researchers analyzed leaf movements and measured the period of time it took the leaves to complete one circadian cycle, noted the time of day when the leaves were pointing straight upward, and calculated the distance the leaves moved during a cycle. All three measurements showed considerable differences in the plants from different areas.

"When we determined day length in each of the latitudes for the plants, we found the correlation was highly significant between the circadian variations in period length and the latitudes of origin of the different plants," says McClung.

A second component of the study provides evidence suggesting that a large number of genes contribute to fine-tuning the Arabidopsis clock.

By crossing Arabidopsis from two different geographic areas, and allowing them to segregate for a number of generations, the researchers identified five chromosomal regions, called quantitative trait loci (QTL), which significantly contribute to either period length or phase or amplitude of the rhythms. Each of these QTL regions includes many genes, at least one of which con

Contact: Sue Knapp
Dartmouth College

Page: 1 2

Related biology news :

1. Coordinating power of circadian rhythms keeps estrus and pregnancy on track
2. Loss of circadian genes results in epilepsy
3. Artificial light-dark cycles expose circadian clocks at odds with each other
4. Unnatural light-dark cycles expose duelling circadian clocks
5. Gene interactions control circadian clock in plants, study finds
6. Dartmouth researchers find two circadian clocks in the same plant tissue
7. Dartmouth researchers identify multi-tasking circadian protein
8. Diabetes tied to altering of the hearts circadian clock
9. Peripheral Swatch watches are a powerful force in bodys circadian rhythms
10. Gene that prevents tumor growth also carries messages from circadian clock
11. New pathway to understanding circadian rhythms

Post Your Comments:

(Date:6/15/2016)... 15, 2016 Transparency Market ... Recognition Market by Application Market - Global Industry Analysis Size ... to the report, the  global gesture recognition market ... and is estimated to grow at a CAGR ... 2024.  Increasing application of gesture recognition ...
(Date:6/9/2016)... 9, 2016 Paris Police ... video security solution to ensure the safety of people and ... during the major tournament Teleste, an international technology ... services, announced today that its video security solution will be ... back up public safety across the country. The system roll-out ...
(Date:6/3/2016)... 2016 Das DOTM ... Nepal hat ein 44 Millionen ... Kennzeichen, einschließlich Personalisierung, Registrierung und IT-Infrastruktur, an ... und Implementierung von Identitätsmanagementlösungen. Zahlreiche renommierte internationale ... teilgenommen, aber Decatur wurde als konformste und ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... STACS DNA Inc., the ... at the Arkansas State Crime Laboratory, has joined STACS DNA as a Field Application ... team,” said Jocelyn Tremblay, President and COO of STACS DNA. “In further expanding our ...
(Date:6/23/2016)... , June 23, 2016  Blueprint Bio, a ... discoveries to the medical community, has closed its Series ... Matthew Nunez . "We have received a ... the capital we need to meet our current goals," ... provide us the runway to complete validation on the ...
(Date:6/23/2016)... , ... June 23, 2016 , ... ... exhibiting at the Pennsylvania Convention Center and will showcase its product’s latest features ... will also be presenting a scientific poster on Disrupting Clinical Trials in The ...
(Date:6/23/2016)... -- Amgen (NASDAQ: AMGN ) today announced a ... sciences incubator to accelerate the development of new therapies ... QB3@953 was created to help high-potential life science and ... stage organizations - access to laboratory infrastructure. ... "Amgen Golden Ticket" awards, providing each winner with one ...
Breaking Biology Technology:
Cached News: