News tagged with hormone
Let the sun shine and the plants will follow
Leonardo da Vinci, the Italian Renaissance scientist and artist extraordinaire, in the 15th century was the first to record his observation that some plants appeared to follow the Sun, and he was not the last. ...
May 30, 2012 |
not rated yet |
0
Is it ripe? Carbon nanotube-based ethylene sensor establishes fruit ripeness
(Phys.org) -- The term ethylene (ethene) generally brings to mind polyethylene plastics, not fruit. However, ethylene is more than just a feedstock for chemical industry, it is also the smallest plant hormone, ...
Chemistry / Analytical Chemistry
May 19, 2012 |
4.8 / 5 (5) |
6
|
Lizard moms may prepare their babies for a stressful world
Stressed out lizard moms tend to give their developing embryos short shrift, but the hardship may ultimately be a good thing for the babies once they're born, according to a study published in the journal ...
Apr 19, 2012 |
5 / 5 (1) |
0
Using math to feed the world
In the race to breed better crops to feed the increasing world population, scientists at The University of Nottingham are using maths to find out how a vital plant hormone affects growth.
Apr 17, 2012 |
5 / 5 (1) |
0
A bit touchy: Plants' insect defenses activated by touch
A new study by Rice University scientists reveals that plants can use the sense of touch to fight off fungal infections and insects. The study, which will be published in the April 24 issue of Current Biology, finds ...
Apr 09, 2012 |
5 / 5 (3) |
0
|
Stomata development in plants unraveled -- a valuable discovery for environmental research
Gent researchers at VIB have unraveled the action mechanism of the main plant hormone that regulates the development of stomata. This breakthrough has important implications for environmental research and for the protection ...
Apr 03, 2012 |
not rated yet |
0
Love is in the air for Britain's giant pandas
The clock is ticking, and the heat is on. A giant male panda loaned to Britain by China has just 36 hours to make his move on his female companion or he'll have to wait another year.
Apr 03, 2012 |
not rated yet |
0
Benefits of taking Fido to work may not be far 'fetched'
Man's best friend may make a positive difference in the workplace by reducing stress and making the job more satisfying for other employees, according to a Virginia Commonwealth University study.
Other Sciences / Social Sciences
Mar 30, 2012 |
not rated yet |
3
Wild orangutans stressed by eco-tourists, but not for long, study out of Borneo finds
Wild orangutans that have come into contact with eco-tourists over a period of years show an immediate stress response but no signs of chronic stress, unlike other species in which permanent alterations in ...
Mar 15, 2012 |
not rated yet |
0
Early ripening of grapes pinned to warming, soil moisture
Researchers in Australia say they have pinpointed key factors in the early ripening of grapes, providing potential answers for wine growers threatened by global warming.
Feb 26, 2012 |
3.8 / 5 (4) |
3
Female sex hormones can weaken the ability of fish to protect themselves against environmental toxins
It is well known that female sex hormones (oestrogens) that end up in rivers and lakes, primarily via spillage from sewers and livestock farming, pose a threat to the environment.
Feb 23, 2012 |
not rated yet |
0
You need to be a healthy to be a heart-throb: study
(PhysOrg.com) -- Men with strong immune systems are most attractive to members of the opposite sex according to a new study from the University of Abertay Dundee and partners.
Other Sciences / Social Sciences
Feb 23, 2012 |
not rated yet |
0
A unique on-off switch for hormone production
Weizmann scientists have revealed a new kind of on-off switch in the brain for regulating the production of a main biochemical signal from the brain that stimulates cortisol release in the body.
Feb 23, 2012 |
5 / 5 (2) |
0
Researchers induce freezing tolerance in fruit fly
(PhysOrg.com) -- Most of what is known about the ability of some cold blooded animals and several insects to survive having their body temperature fall below freezing has led to the conclusion that those organisms ...
Feb 14, 2012 |
5 / 5 (3) |
0
|
Steroids control gas exchange in plants
Plants leaves are sealed with a gas-tight wax layer to prevent water loss. Plants breathe through microscopic pores called stomata (Greek for mouths) on the surfaces of leaves. Over 40% of the carbon dioxide, CO2, in the ...
Feb 05, 2012 |
3.7 / 5 (3) |
0
|
Hormone
Hormones (from Greek ὁρμή - "impetus") are chemicals released by cells that affect cells in other parts of the body. Only a small amount of hormone is required to alter cell metabolism. It is essentially a chemical messenger that transports a signal from one cell to another. All multicellular organisms produce hormones; plant hormones are also called phytohormones. Hormones in animals are often transported in the blood. Cells respond to a hormone when they express a specific receptor for that hormone. The hormone binds to the receptor protein, resulting in the activation of a signal transduction mechanism that ultimately leads to cell type-specific responses.
Endocrine hormone molecules are secreted (released) directly into the bloodstream, while exocrine hormones (or ectohormones) are secreted directly into a duct, and from the duct they either flow into the bloodstream or they flow from cell to cell by diffusion in a process known as paracrine signalling.
For more information about Hormone, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
