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

Page: 1 2

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:9/19/2014)... the unique bioelectric signaling system of the electric fish, ... The OU researcher is working to understand how these ... used to map the world around them. Electric ... discharges a second throughout their lives. The energetic ... necessary for survival. , "There is evidence that electric ...
(Date:9/19/2014)... Nxt-ID, Inc. (Nasdaq: NXTD and NXTDW) ("Nxt-ID" or ... market, updates the "Wocket in Your Pocket" celebrity ad campaign, featuring ... weight classes, Vinny Pazienza (PAZ). , ... Thrones actor Ciaran Hinds and Sons of ... Sagal have been cast in Bleed for This . ...
(Date:9/18/2014)... located deep in the primitive brainstem has revealed how ... Harvard School of Medicine and the University at Buffalo ... the second "sleep node" identified in the mammalian brain ... to produce deep sleep. , Published online in August ... fully half of all of the brain,s sleep-promoting activity ...
Breaking Biology News(10 mins):NXT-ID's Vinny Paz Celebrity Ad Wocket Update: Katey Sagal and Ciaran Hinds Attached to His Upcoming Movie 2NXT-ID's Vinny Paz Celebrity Ad Wocket Update: Katey Sagal and Ciaran Hinds Attached to His Upcoming Movie 3No sedative necessary: Scientists discover new 'sleep node' in the brain 2
... SANTA CRUZ, CA--Researchers have found compelling evidence for an ... the seafloor. The microbes in this hidden world appear ... in deep ocean water, a finding that could dramatically ... Matthew McCarthy, associate professor of ocean sciences at ...
... at Seattle Biomedical Research Institute (Seattle BioMed) and Northwestern ... milestone in the effort to wipe out some of ... of two large structural genomics centers, they,ve experimentally determined ... and protozoan pathogens, which could potentially lead to new ...
... Mich. --- While Asian carp, gypsy moths and zebra ... ecosystems and flourishing outside of the limelight. A ... of ecology, sheds light on why invasive microbial invaders ... many of the same traits as their larger, ,macro, ...
Cached Biology News:Life thrives in porous rock deep beneath the seafloor, scientists say 2Life thrives in porous rock deep beneath the seafloor, scientists say 3Life thrives in porous rock deep beneath the seafloor, scientists say 4Milestone in fight against deadly disease 2Milestone in fight against deadly disease 3Invisible invasive species 2
(Date:9/22/2014)... 2014 This is a professional and ... (mPDA) industry in Global and China. The report ... applications and industry chain structure. Global market analysis and ... on history, developments, trends and competitive landscape of the ... is also offered. , The report also focuses on ...
(Date:9/22/2014)... (PRWEB) September 22, 2014 ... desire to stay young has groomed and nurtured ... industry worldwide. Growing emphasis on appearance maintenance is ... is a neurotoxic protein obtained from the bacterium, ... resulting in muscle relaxation. With cosmetic indications for ...
(Date:9/22/2014)... 2014  Neogen Corporation (Nasdaq: NEOG ) ... of its 2015 fiscal year, which ended Aug. 31, ... income of $7,839,000 in the first quarter of last ... 30, 2013, earnings per share in the current quarter ... First quarter revenues increased 15% to $67,599,000, from ...
(Date:9/22/2014)... Olso, Norway (PRWEB) September 22, 2014 ... convenient new parcel and pallet measuring device ... ScanTape™ eliminates manual data entry, offering greater ease ... time savings that result can significantly enhance productivity—an ... in industries where processing volume equals profits. ...
Breaking Biology Technology:m-Phenylenediamine Industry: mPDA Global & China Trend Analysis Now Available at ReportsnReports.com 2m-Phenylenediamine Industry: mPDA Global & China Trend Analysis Now Available at ReportsnReports.com 3Strong Demand for Non-Invasive Cosmetic Procedures Drives the Global Botulinum Toxin Market, According to New Report by Global Industry Analysts, Inc. 2Strong Demand for Non-Invasive Cosmetic Procedures Drives the Global Botulinum Toxin Market, According to New Report by Global Industry Analysts, Inc. 3Neogen reports 13% net income increase 2Neogen reports 13% net income increase 3Neogen reports 13% net income increase 4Neogen reports 13% net income increase 5Neogen reports 13% net income increase 6Neogen reports 13% net income increase 7ScanTape™ Handheld Dimensioner Increases Processing Volume 2
... WORCESTER, Mass., July 14 The Huffington Post ... book (co-authored with astronomer Bob Berman) " Biocentrism." The ... understanding the universe. The Huffington Post is ranked the ... It reaches over 20 million thought-leaders, and has featured celebrity contributors ...
... , , BEDFORD, Mass., July 14 ... industry, today announced the publication of the South American ... Biomass Energy Plantations . This new study updates and expands ... - Global Tree Farm & Managed Forest Industry . ...
... July 14 The Board of Directors of,Santaris Pharma has approved the Interim Report ... The loss after tax realised in the 2nd quarter of 2009 was, ... the 2nd, quarter of 2008., - ... DKK (23,6m EUR)., - In Q2 the SPC3649 compound targeting ...
Cached Biology Technology:New Scientific Worldview 'Biocentrism' Featured in The Huffington Post - #1 Weblog in the World 2New RISI Report Analyzes South American Tree Farm and Biomass Energy Investment Opportunities 2New RISI Report Analyzes South American Tree Farm and Biomass Energy Investment Opportunities 3Santaris Pharma - Interim Report for the Period 1 January to 30 June 2009 2Santaris Pharma - Interim Report for the Period 1 January to 30 June 2009 3Santaris Pharma - Interim Report for the Period 1 January to 30 June 2009 4Santaris Pharma - Interim Report for the Period 1 January to 30 June 2009 5Santaris Pharma - Interim Report for the Period 1 January to 30 June 2009 6Santaris Pharma - Interim Report for the Period 1 January to 30 June 2009 7Santaris Pharma - Interim Report for the Period 1 January to 30 June 2009 8Santaris Pharma - Interim Report for the Period 1 January to 30 June 2009 9
... dispensers save space and organize ... and other garb. They are ... for small parts used in ... acrylic. Open-slot design for easy ...
... Microarrays designed for genome-wide microRNA ... flexible and powerful Paraflo microfluidic on-chip ... as part of our comprehensive microRNA ... Content The Soil Nematode microRNA ...
... is critical to the maintenance of ... proteins as important and diverse as ... shock and stress response, antigen presentation, ... ion channels, cell cycle regulation, transcription, ...
... Proteolytic degradation is critical to ... short-lived and regulatory proteins as important ... cellular metabolism, heat shock and stress ... surface receptors and ion channels, cell ...
Biology Products: