Navigation Links
The bonsai effect: Wounded plants make jasmonates, inhibiting cell division, stunting growth
Date:11/11/2008

It is well known that plants growing under unfavourable conditions are generally smaller than those growing in stress-free conditions: indeed it is estimated that in the US, abiotic stress reduces the yield of agricultural crops by an average of 22%. A spectacular example of the effect of stress in this case, repeated wounding on plant growth is given by bonsai trees, in which every aspect of their stature, including height, girth, and size of leaves, is uniformly reduced to as little as 5% of that of their untreated sister trees. However, the mechanism of wound-induced stunting remains obscure.

Plant growth results from divisions of "stem cells" in apical meristems that are located in the very tips of green shoots and roots. The shoot apical meristems are not only tiny, (0.1 to 0.3 mm diameter), but are normally hidden from view by the very young leaves emerging from the base of the meristem. Thus, the initial growth and shape of leaves is by cell division, and more than 90% of leaf growth is by subsequent cell expansion.

Reporting in the online, open-access journal PLoS ONE on November 11, Yi Zhang and John Turner at the University of East Anglia found that when leaves of the model plant Arabidopsis are wounded, cell division in the apical meristem is reduced, growth of the plant is arrested within days, and the new leaves grow to only one-half of their normal size although the size of leaf cells is unaffected.

Unexpectedly, the suppression of cell division in the apical meristem occurs through a signal pathway initiated by the wound hormone, jasmonate, which is synthesised in the damaged mature leaves. Mutant Arabidopsis lines unable to synthesise or to respond to jasmonate are not only larger than normal plants, but their growth is not reduced by the wound stress.

The researchers note that this finding opens the possibility of improving crop growth through the manipulation of the jasmonate signal pathway.


'/>"/>

Contact: John Turner
j.g.turner@uea.ac.uk
Public Library of Science
Source:Eurekalert

Related biology news :

1. X-effect: female chromosome confirmed a prime driver of speciation
2. Ripple effect: Water snails offer new propulsion possibilities
3. Innovative strategies for war wounded
4. Layered approach may yield stronger, more successful bone implants
5. Clever plants chat over their own network
6. Plants can be used to study how and why people respond differently to drugs
7. Book on weeds and invasive plants discusses how to manage them using ecological approaches
8. A greenhouse in order to study the impact of climate change on plants
9. Agent that triggers immune response in plants is uncovered
10. Scientists ramp up ability of poplar plants to disarm toxic pollutants
11. A new baseline of invasive plants in Isabela
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/6/2017)... , March 6, 2017 ... sales technology, today announced Predictive Sales Coach TM ... infusing actionable sales intelligence into Salesforce. This unique ... enable their sales organizations with deep knowledge of ... allow for intelligent engagement. Predictive Sales Coach extends ...
(Date:3/2/2017)... -- Who risk to be deprived of its imprint ... https://www.reportbuyer.com/product/4313699/ WILL APPLE AND SAMSUNG CONFRONT ... sensors using capacitive technology represent a fast growing market, ... an increase of 360% of the number of fingerprint ... sensor market between 2014 and 2017 (source : N+1 ...
(Date:2/28/2017)... LOS ANGELES , Feb. 28, 2017   ... identity verification software globally, announces significant enhancements to new ... in May 2016. New products include mobile and desktop ... and DocX TM - a real time manual ... Acuant,s core idScan® technology provides the fastest and most ...
Breaking Biology News(10 mins):
(Date:3/27/2017)... -- Infectex Ltd., a Russian portfolio company of Maxwell Biotech Venture Fund ... to the standard drug therapy regimen in patients with multidrug-resistant pulmonary tuberculosis (MDR-TB). SQ109 ... USA ) and the US National Institutes of Health. ... ... ...
(Date:3/27/2017)... March 27, 2017  Perthera,s Chief Bioinformatics Officer and ... Subha Madhavan , Ph.D., will be speaking at the ... On Monday, March 27, 2017, she will be speaking ... Usable for Research and Care" (from 10:30 a.m. – ... she will be a participant in the "Making Precision ...
(Date:3/27/2017)... ... 2017 , ... PMG Research is pleased to announce its participation ... Conference Forum in Boston on April 3-4, 2017. The CTC conference focuses on how ... and bring them closer to the patient. Clinical Trial Collaborations also will present an ...
(Date:3/27/2017)... , March 27, 2017  Trovagene, Inc. (NASDAQ: ... its Chief Executive Officer, Bill Welch , will ... 4, 2017 at 9:00 AM EDT at the Essex ...  Bill Welch, and Chief Scientific Officer, Mark Erlander ... investors during the conference.   The presentation will ...
Breaking Biology Technology: