Aug 09 2016
Every night for 100 nights, Harmer's post-doctorate researcher Hagop Atamian went into a field of sunflowers planted in pots and rotated them so they were facing west in the morning.
This behavior of these ethereal flowers remained a mystery until now when the scientists have answered this question, central to their charm. The lovely yellow flowers turn east in the morning to face the rising sun and then moves across the sky during the day before heading westward by dusk.
They also found, by placing ink dots on the stems and filming them, that the east side of the plant would grow faster when facing the sun.
"It's the first example of a plant's clock modulating growth in a natural environment, and having real repercussions for the plant", said Stacey Harmer, professor of plant biology at UC Davis and senior author on the paper to be published August 5 in the journal Science. That's a result of different sides of the stem elongating depending on what time of day it is.
To see if the plants had their own biological clocks that were reset daily by the Sun, similar to our own, or were simply moving according to a pre-determined schedule, the team performed a series of experiments.
Young sunflowers follow the sun, their still-green buds arcing from east to west across the summer sky as dawn turns to noon turns to dusk.
Salman Khan, Soh and Arbaaz to support FREAKY ALI trailer launchail
As for Nawaz, he is equally thrilled to work with both Sohail and Arbaaz , with whom he shares a great rapport on and off camera. Nawaz told about his director " Sohail " that "He's very quiet and a steady worker, and he has a brilliant sense of humor".
Congresswoman Joins Purple Heart Veterans Blasting Trump for 'Repugnant' Comments
Trump has no gratitude or respect for the sacrifices our servicemen and women make, nor even the slightest concept of sacrifice. Barney, a Democratic congressional candidate from DE , blasted Trump for his "flippant and repugnant" comments.
Wilmots: Hazard will recover in time for Wales
Despite Sunday's emphatic win, Wilmots was upset about Belgium's failure to translate first half dominance into goals. Eden Hazard could eclipse his "difficult" season with Chelsea by taking Euro 2016 by storm, according to Axel Witsel.
Following the sun appeared to boost sunflower growth, as those that were staked and rendered motionless reached smaller sizes than those with freedom of movement. More sunlight equals better growth, and the plants know it.
To find out more about why the flowers do this, the researchers used staked plants in pots to prevent them from following the sun.
This shows that following the sun throughout the day is advantageous, helping the plants both grow in size and ensure pollination.
A report published in NY Times revealed, "At dawn, whole fields of sunflowers stand at attention, all facing east, and begin their romance with the rising sun". Again, the circadian clock helps lead to the eastward orientation of sunflower heads when they stop tracking as they bloom, Blackman said.
When plants were moved into an indoor growth chamber with immobile overhead light, they continued to swing back and forth for a few days - the kind of behavior you would expect from a mechanism driven by an internal clock. Second, the internal clock is set to track the direction of light, leading the stem to grow unevenly, and causing the sunflower to sway east and west throughout the day. A portable heater was enough to restore a large numbers of pollinators back to the west-facing ones.
In another experiment, the researchers prevented outdoor potted sunflowers from tracking the sun.
"We show that these roles impact how much the plants grow and how well they attract pollinators, thus demonstrating that this regulation of light-responsive growth by the clock is likely an (evolutionary) adaptation", said co-author Benjamin Blackman, an assistant professor of plant and microbial biology at UC Berkeley.
Aug 09 2016
On the air for August 8
The dominant United States of America men's basketball team takes on Venezuela at 5 p.m. after beating China Saturday 119-62. San Francisco at Miami, MLB, 6 p.m.; Atlanta at Milwaukee, FSWI, 6:20 p.m.; Houston at Minnesota, 7:10 p.m.
Aug 09 2016
Hope Solo: 'Zika' booing from fans doesn't bother me
Ahead of the Olympics, Ms Solo said: "I'm going to take every precaution necessary". The photo went viral and Solo knew she was walking into a hornets nest.
Aug 08 2016
Mercedes driver Hamilton increases lead with German GP win
Red Bull's Daniel Ricciardo clinched second, 6.9 seconds behind, with team-mate Max Verstappen completing the podium in third. The result means Hamilton has outscored Rosberg by 62 points since the pair collided at the Spanish Grand Prix in May.
Aug 08 2016
Olympic Cycling: Annemiek van Vleuten suffers horror crash in women's road race
Asked if she was disappointed with the result, Armitstead said: "I feel quite proud of myself that I've held it together". This is sport and that's what it's about. "I'm so disappointed I couldn't give anything back".
Aug 08 2016
11-year-old puts Mike Pence on the spot with Trump question
The national campaigning is just beginning, and he's been everywhere - but hasn't spent much time in Indiana. He has been fascinated by politics for a while and it just so happens he was born on Election Day in 2004.
Aug 07 2016
Trump ends standoff with Ryan as he works to repair mistakes
Trump said he had created an economic advisory team and would release his plan to boost the USA economy in a speech on Monday. He called Ryan "a good man", adding that they while they may disagree on a couple of things, but mostly they agree.
Aug 07 2016
Brazilian marathoner gets his Olympic moment 12 years after attack in Athens
He eventually had to settle for bronze behind Italian victor Stefano Baldini and American Mebrahtom Kelezighi. The 2016 Summer Olympics officially began on Friday inside the Maracana Stadium in Rio de Janeiro, Brazil.
Aug 07 2016
Moyes makes first Sunderland signing with Djilobodji
Chelsea have confirmed the sale of central defender Papy Djilobodji to fellow Premier League side Sunderland in an £8m deal. Djilobodji told www.safc.com: "I'm so happy to join Sunderland , I believe we are going to do something this year".
Jul 13 2016
Salman Khan's 'Sultan' sets new box office record
Looked like the whole of Bollywood made sure that they attend the screening of Bollywood's bad boy, Salman Khan's new movie. This time, even before the verdict on Sultan is out, Salman Khan's next Eid release has already been announced.
Jul 12 2016
Parents of Micah Xavier Johnson Speak Out
Kennedy was slain in 1963 marked the deadliest day for USA law enforcement since the September 11, 2001, terrorist attacks. Dallas shooting: Who was Micah Johnson? The photos show a bloodied body and a semi-automatic rifle sitting atop rubble.
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