Navigation Links
Hormone clue to root growth
Date:7/7/2009

Plant roots provide the crops we eat with water, nutrients and anchorage. Understanding how roots grow and how hormones control that growth is crucial to improving crop yields, which will be necessary to address food security and produce better biofuels.

Now an international group of scientists, led by the Centre for Plant Integrative Biology at The University of Nottingham, has shed light on how a plant hormone is crucial in controlling the growth of plant roots.

Plant growth is driven by an increase in two factors: the number of cells, and their size. It is already known that the plant hormone gibberellin controls how root cells elongate as the root grows in the model plant Arabidopsis thaliana. Now a paper appearing in Current Biology describes for first time how this hormone also regulates the number of cells in the root in order to control root growth.

Gibberellin normally acts by signaling the removal of proteins which repress growth, and so promotes root cell production. The new research shows that mutant plants that do not produce gibberellin are unable to increase their cell production rate and the size of the root meristem, the zone of cell proliferation.

Plants in which the cells in the meristem were made to express a mutant version of the growth-repressing protein GAI not degraded by gibberellin showed disrupted cell proliferation. Expressing this mutant form, gai, in only one tissue, the endodermis (the innermost layer of the root cortex of a plant), was sufficient to stop the meristem enlarging. In effect, the rate of expansion of dividing endodermal cells dictates the equivalent rate in other tissues.

This research was headed by Dr Susana Ubeda-Toms and Professor Malcolm Bennett of the Centre for Plant Integrative Biology, in collaboration with scientists in Nottingham, Cambridge, Edinburgh, Spain, Belgium and Sweden.

Professor Malcolm Bennett, Biology Director for the Centre for Plant Integrative Biology and Professor of Plant Sciences in the Division of Plant and Crop Sciences, said: "We have shown that gibberellin plays a crucial role in controlling the size of the root meristem, and that it is the endodermis which sets the pace for expansion rates in the other tissues.

"Understanding precisely how hormones regulate plant growth is one of the key areas of fundamental plant biology which will underpin crop improvements in the future."

The Centre for Plant Integrative Biology (CPIB) is funded by the Systems Biology joint initiative of BBSRC and EPSRC, which has provided 27 million for six specialised centres across the UK.

The Division of Plant and Crop Sciences at The University of Nottingham is one of the largest communities of plant scientists in the UK. Around 160 people work in the Division, which welcomes visiting scientists from all over the world, reinforcing its reputation as a world renowned centre.


'/>"/>

Contact: Dr Susannah Lydon
susannah.lydon@nottingham.ac.uk
44-011-595-16289
University of Nottingham
Source:Eurekalert

Related biology news :

1. Lack of happiness hormone serotonin in the brain causes impaired maternal behavior in mice
2. Fatty foods -- not empty stomach -- fire up hunger hormone
3. Hormone-mimics in plastic water bottles -- just the tip of the iceberg?
4. Pregnancy hormone predicts postpartum depression
5. Protein that regulates hormones critical to womens health found in pituitary
6. Hormone therapy associated with reduced colorectal cancer risk
7. Food can affect a cell in the same way hormones do
8. Children distressed by family fighting have higher stress hormones
9. Apelin hormone injections powerfully lower blood sugar
10. Birth control has long-term effect on hormone exposure
11. Sex hormones link to heart risk
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/23/2016)... WAKEFIELD, Massachusetts , March 23, 2016 ... kombiniert im Interesse erhöhter Sicherheit Gesichts- und ... Xura, Inc. (NASDAQ: MESG ... heute bekannt, dass das Unternehmen mit SpeechPro ... insbesondere aus der Finanzdienstleistungsbranche, wird die Möglichkeit ...
(Date:3/21/2016)... Unique technology combines v ... security   Xura, Inc. ... digital communications services, today announced it is working alongside ... customers, particularly those in the Financial Services Sector, the ... within a mobile app, alongside, and in combination with, ...
(Date:3/15/2016)... --> --> ... Research "Digital Door Lock Systems Market - Global Industry Analysis, ... global digital door lock systems market in terms of revenue ... forecast to grow at a CAGR of 31.8% during the ... enterprises (MSMEs) across the world and high industrial activity driving ...
Breaking Biology News(10 mins):
(Date:5/4/2016)... York, NY (PRWEB) , ... May 04, 2016 ... ... has leveraged recent innovations in biotechnology to help treat hormonal and stress related ... loss, Nutrafol® has captured the hearts of key opinion leaders in the medical ...
(Date:5/3/2016)... Boston, MA (PRWEB) , ... May 03, 2016 , ... ... ranked number 25 out of the state’s 76 fastest-growing private companies; a small percentage ... of Massachusetts, and ranked organizations on the percent change in revenue from 2012 to ...
(Date:5/3/2016)... , ... May 03, 2016 , ... ... accessibility to unique bioresearch materials from laboratories across the globe, today announced the ... to increase the pace of research toward treatment and prevention measures for the ...
(Date:5/3/2016)... , May 3, 2016  Dr. Thomas P. ... in The Woodlands, Texas , now ... percent of treated fat cells in just 25-minutes, leaving ... to 90 percent of Americans report feeling bothered by ... fat reduction procedures are a growing industry. This innovative ...
Breaking Biology Technology: