HOME >> BIOLOGY >> NEWS
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
Sue.Knapp@dartmouth.edu
603-646-3661
Dartmouth College
6-Nov-2003


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:
*Name:
*Comment:
*Email:
TAG: Plants circadian clocks tune into latitude enhance fitness

(Date:8/28/2015)... August 28, 2015 According to ... Market by Assessment Type (Pen & Paper Based, Hosted, ... Corporate Learning, Academic Research), Vertical and Region - Global ... Training Market to grow from USD 2.4 Billion in ... Compound Annual Growth Rate (CAGR) of 25.6% from 2015 ...
(Date:8/20/2015)... 2015 The wearable technology market has ... and healthy. However, wearable technology has the potential ... help improve diagnostic capabilities and therapeutic outcomes. Today, ... Wearable Technologies Conference 2015 , where Barrett ... in healthcare.    "Over the past ...
(Date:8/18/2015)... , Aug. 17, 2015 Research and ... of the "Global Biometric Authentication & Identification ... Estimation & Forecast, 2015-2020" report to their ... and identification systems market is expected to grow ... to 2020 and generate over $25 billion (approximately) ...
Breaking Biology News(10 mins):Cognitive Assessment and Training Market Worth 7.5 Billion USD by 2020 2Cognitive Assessment and Training Market Worth 7.5 Billion USD by 2020 3Cognitive Assessment and Training Market Worth 7.5 Billion USD by 2020 4Leaf Healthcare Releases Video from Wearable Technology Conference on New Applications for Wearables in the Hospital Environment 2Leaf Healthcare Releases Video from Wearable Technology Conference on New Applications for Wearables in the Hospital Environment 3Global Biometric Authentication & Identification Market 2015: Focus On Modality, Motility & Application - Estimation & Forecasts to 2020 for the $25 Billion Industry 2
(Date:8/31/2015)... LabStyle Innovations Corp. (OTCQB: DRIO), developer ... it recently closed a round of funding totaling ... support the global rollout and initial U.S. commercial ... management solution that includes novel software applications combined ... device, and for working capital purposes. The Dario ...
(Date:8/31/2015)... , ... August 31, 2015 , ... ... a high priority in the drug development approval process. Thus, innovator companies must ... year, Regis Technologies, Inc., a Chicago-based CMO, has been hosting multiple educational panels ...
(Date:8/31/2015)... ... 31, 2015 , ... There’s a new treatment option for excessive menstrual bleeding ... new FDA approved system in the last 14 years, and the only endometrial ablation ... bleeding) rate of 66%, the high Patient Satisfaction rate of 98%, and the fastest ...
(Date:8/30/2015)... England , August 31, 2015 ...   einer Frau   für chirurgische   Behandlung     ... von 7-90   werden für eine   verheerende ... 1200 Frauen behandeln und die Anzahl ausgebildeter Chirurgen in ... Astellas gab heute bekannt, dass  Action on Fistula ...
Breaking Biology Technology:LabStyle Innovations Closes $2.5 Million Funding to Support Global Rollout of Dario Diabetes Management Solution 2LabStyle Innovations Closes $2.5 Million Funding to Support Global Rollout of Dario Diabetes Management Solution 3LabStyle Innovations Closes $2.5 Million Funding to Support Global Rollout of Dario Diabetes Management Solution 4Regis Shares Expert Advice on Impurities in Drug Development 2Regis Shares Expert Advice on Impurities in Drug Development 3U.S. FDA Approves Minerva Endometrial Ablation System 2U.S. FDA Approves Minerva Endometrial Ablation System 3Über 550 Frauen, deren Leben durch "Action on Fistula" transformiert wurde 2Über 550 Frauen, deren Leben durch "Action on Fistula" transformiert wurde 3Über 550 Frauen, deren Leben durch "Action on Fistula" transformiert wurde 4Über 550 Frauen, deren Leben durch "Action on Fistula" transformiert wurde 5
Cached News: