Featured Research

from universities, journals, and other organizations

Hunt For A New Plant Hormone Points To Carotenoids

Date:
July 29, 2004
Source:
Cell Press
Summary:
In looking for clues to the identity of a mysterious new plant hormone, a research team lead by Ottoline Leyser of the University of York has come one step closer in finding a gene required for the hormone's synthesis.

In looking for clues to the identity of a mysterious new plant hormone, a research team lead by Ottoline Leyser of the University of York has come one step closer in finding a gene required for the hormone's synthesis. The biochemical activity of this synthesis protein potentially offers a significant clue to the nature of the hormone, which is thought to coordinate rates of growth between different plant tissues.

In plants, as in animals, communication between different parts of the body is vital if the left hand is to know what the right hand is doing. In animals, this is achieved by a combination of the nervous system and hormone signals. Plants don't have a nervous system, so hormonal signals have a greater role to play. Darwin was instrumental in discovering the first known plant hormone, auxin, and since then a handful of additional long-distance chemical messengers have been found in plants. This number is surely insufficient to accomplish the complex coordinated progression of a plant through its life cycle and the plant's diverse responses to changing environmental conditions. Many plant biologists therefore believe that there are more plant hormones out there waiting to be discovered.

Recent results from work on pea, petunia, and the small weed Arabidopsis have suggested the existence of one such novel plant hormone. The main role of this hormone is to regulate the degree of shoot branching. The hormone is apparently made throughout the plant, but hormone made in the roots is able to travel up the plant to influence branching in the shoot, suggesting that it may play a role in balancing root and shoot growth.

In this issue of Current Biology, Ottoline Leyser and co-workers describe the identification of a gene that is essential for the synthesis of this novel hormone. The gene encodes a protein that they show can cleave carotenoids, such as the chemicals responsible for the orange pigment in carrots. This suggests that the new hormone is a carotenoid derivative, and this will help in the hunt for its identity.

###

Jonathan Booker, Michele Auldridge, Sarah Wills, Donald McCarty, Harry Klee, and Ottoline Leyser: "MAX3/CCD7 Is a Carotenoid Cleavage Dioxygenase Required for the Synthesis of a Novel Plant Signaling Molecule"

Published in Current Biology, Volume 14, Number 14, 27 July 2004, pages 1232-1238.


Story Source:

The above story is based on materials provided by Cell Press. Note: Materials may be edited for content and length.


Cite This Page:

Cell Press. "Hunt For A New Plant Hormone Points To Carotenoids." ScienceDaily. ScienceDaily, 29 July 2004. <www.sciencedaily.com/releases/2004/07/040727085832.htm>.
Cell Press. (2004, July 29). Hunt For A New Plant Hormone Points To Carotenoids. ScienceDaily. Retrieved September 17, 2014 from www.sciencedaily.com/releases/2004/07/040727085832.htm
Cell Press. "Hunt For A New Plant Hormone Points To Carotenoids." ScienceDaily. www.sciencedaily.com/releases/2004/07/040727085832.htm (accessed September 17, 2014).

Share This



More Plants & Animals News

Wednesday, September 17, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Some Tobacco Farmers Thrive Amid Challenges

Some Tobacco Farmers Thrive Amid Challenges

AP (Sep. 16, 2014) The South's tobacco country is surviving, and even thriving in some cases, as demand overseas keeps growers in the fields of one of America's oldest cash crops. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Scientists Given Rare Glimpse of 350-Kilo Colossal Squid

Scientists Given Rare Glimpse of 350-Kilo Colossal Squid

AFP (Sep. 16, 2014) Scientists say a female colossal squid weighing an estimated 350 kilograms (770 lbs) and thought to be only the second intact specimen ever found was carrying eggs when discovered in the Antarctic. Duration: 00:47 Video provided by AFP
Powered by NewsLook.com
Raw: Scientists Examine Colossal Squid

Raw: Scientists Examine Colossal Squid

AP (Sep. 16, 2014) Squid experts in New Zealand thawed and examined an unusual catch on Tuesday: a colossal squid. It was captured in Antarctica's remote Ross Sea in December last year and has been frozen for eight months. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Ivorians Abandon Monkey Pets in Fear Over Ebola Virus

Ivorians Abandon Monkey Pets in Fear Over Ebola Virus

AFP (Sep. 16, 2014) Since the arrival of Ebola in Ivory Coast, Ivorians have been abandoning their pets, particularly monkeys, in the fear that they may transmit the virus. Duration: 00:47 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins