Navigation Links
Can a single layer of cells control a leaf's size?
Date:2/25/2010

r, negating the complications that arise when comparing different leaves on a single plant or leaves on different plants," Marcotrigiano said.

Creating these graft chimeras was time-consuming and involved an element of chance; often the growing tip of the chimeral shoots reverted back to a non-chimeral shoot rendering the leaves generated from that point on useless for analysis. However, over the past decade enough leaves were recovered that were perfectly bisected, homogeneous on one side of the midvein and with a unique epidermis on the other. This allowed Marcotrigiano to use them to examine how leaf cell layer affects leaf size and shape.

Marcotrigiano's most striking finding was the important role that the epidermal cells played in determining leaf size. He found that leaves grew asymmetrically when one side of the midvein contained identical cell layer arrangements and the other side contained epidermal cells that differed genetically from the mesophyll cells. When big-leaf epidermal cells surrounded small-leaf mesophyll cells in an otherwise all small-genotype leaf, the big-leaf epidermal cells caused that side of the leaf to be bigger than the other side. In contrast, when small-leaf epidermal cells surrounded big-leaf mesophyll cells in an otherwise all big-genotype leaf, the small-leaf epidermal cells caused that side to be smaller than the other side.

Epidermal cells not only controlled overall leaf size, but also influenced the number of cells produced in the mesophyll layer. For example, small-leaf epidermal cells surrounding big-leaf mesophyll cells caused the mesophyll cells to have many fewer cell divisions than when they were surrounded by big-leaf epidermal cells. Interestingly, the epidermal cells did not influence, or change, the size of the mesophyll cells.

Marcotrigiano concludes that while regulation of leaf size is complex and influenced by many factors and many genes, his findings show that communication b
'/>"/>

Contact: Richard Hund
rhund@botany.org
314-577-9557
American Journal of Botany
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Method of the future uses single-cell imaging to identify gene interactions
2. A single atom controls motility required for bacterial infection
3. Saving the single cysteine: New antioxidant system found
4. Olympus introduces the VisiGlide, a single-use guidewire
5. Single-stranded DNA-binding protein is dynamic, critical to DNA repair
6. New nanochemistry technique encases single molecules in microdroplets
7. Single host gene may hold key to treating both ebola and anthrax infections
8. Single thawed embryo transfer after PGD does not affect pregnancy rates
9. Researchers observe single protein dimers wavering between two symmetrically opposed structures
10. Single women gaze longer
11. Single gene defect can cause stroke, other artery diseases
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Can a single layer of cells control a leaf's size?
(Date:12/19/2014)...   LaunchKey , the first decentralized mobile authentication ... of Things era, today announced the close of $3 ... led by Metamorphic Ventures with participation from ENIAC Ventures, ... others.  LaunchKey has raised $4 million to date, and ... and bring LaunchKey to market in 2015. ...
(Date:12/17/2014)... 2014 Valencell, a leader in performance biometric ... to industry leaders such as Intel, Jabra, Atlas, and ... wearable products. These products will be showcased at CES ... Vegas . "Our partners choose ... robust – with the clinical data to back it ...
(Date:12/11/2014)... Dec. 09, 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has announced the ... APAC Region 2015-2019"  report to their offering. ... market is advances in technology. With continuous advances ... solutions to the latest standard that meets the ...
Breaking Biology News(10 mins):LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... 2008) A new study by the Bronx Zoo-based ... the Greater Yellowstone Ecosystem have apparently hopped into oblivion. ... of the journal Oryx, also speculates that the disappearance ... a variety of other prey species and their predators. ...
... crucial proteins in our bodies must fold into complex shapes ... to move them around, to speed up important chemical reactions ... "off" to affect which proteins our cells make. Recently, ... genetic code into protein-can act a lot like a protein ...
... of shrimp and fish in tropical coastal areas is ... poverty, but in fact this cultivation has negative consequences ... Daniel A. Bergquist of Uppsala University, Sweden, has studied ... The cultivating of fish and shellfish in artificial ...
Cached Biology News:Hareless: Yellowstone's rabbits have vanished, study says 2Stanford researchers make first direct observation of 3-D molecule folding in real time 2Stanford researchers make first direct observation of 3-D molecule folding in real time 3Stanford researchers make first direct observation of 3-D molecule folding in real time 4Stanford researchers make first direct observation of 3-D molecule folding in real time 5Global trade in tiger shrimp threatens environment 2
(Date:12/24/2014)... December 23, 2014 The ... such as its definition, classification, application and ... specification, manufacturing process, and product cost structure. ... applications. The analysis also covers upstream raw ... industry development trend and proposals. In the ...
(Date:12/24/2014)... BEIJING , Dec. 23, 2014 ... or the "Company"), a leading fully integrated plasma-based ... today announced that its majority-owned subsidiary, Shandong Taibang ... Practices ("GMP") certification from the China Food and ... factor production facility. As previously disclosed in the ...
(Date:12/24/2014)... Dec. 23, 2014  Rock Creek Pharmaceuticals, Inc., (NASDAQ: ... filed a Clinical Trial Application (CTA) with the ... Agency (MHRA) seeking regulatory approval to initiate clinical trials ... Citrate. Contingent on the Company receiving CTA ... I trial to assess the safety, tolerability and dose ...
(Date:12/22/2014)... RepliCel Life Sciences Inc. (OTCQB: REPCF) (TSX.V: RP), a ... of autologous cell therapies, announced today the publication of ... conjunction with co-authors from Kyoto University and the University ... clinical research using dermal sheath cup (DSC) cells to ... paper entitled " Hair Follicle Dermal Stem Cells Regenerate ...
Breaking Biology Technology:Worldwide Methyl Mercaptan Market 2015-2020 Forecasts on Development & Trends Now Available at ReportsnReports.com 2China Biologic Receives GMP Certification for New Coagulation Factor Facility 2China Biologic Receives GMP Certification for New Coagulation Factor Facility 3Rock Creek Pharmaceuticals Files Clinical Trial Application in the UK for Clinical Trials of Anatabine Citrate Formulations 2Rock Creek Pharmaceuticals Files Clinical Trial Application in the UK for Clinical Trials of Anatabine Citrate Formulations 3Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 2Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 3Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 4Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 5
... ... of eCommerce, CRM and business intelligence solutions, today announced that Industrial Training International (ITI) ... five divisions: Training, Field Services, Certification, Bookstore, and E-Learning. , ... Northbrook, IL, and Woodland, WA ...
... ... Wilson has joined the company as Vice President of Finance and Administration. Mr. Wilson ... corporate office in Lake Forest, CA. , ... Healthcare Data Solutions announced that Mitchell Wilson has joined the company ...
... EMERYVILLE, Calif. , May 4 Bionovo, Inc. (Nasdaq: BNVI ... fiscal year 2010 ended March 31, 2010 on Tuesday, May 11, ... financial results on Tuesday, May 11, 2010 at 5:00 p.m. ET ... Interested parties can access the call by ...
Cached Biology Technology:EDL Consulting Chosen to Implement Visionary Cloud-based eCommerce-Driven Learning Management System 2EDL Consulting Chosen to Implement Visionary Cloud-based eCommerce-Driven Learning Management System 3Healthcare Data Solutions Announces New Executive Team Member 2Bionovo, Inc. to Announce First Quarter Fiscal Year 2010 Financial Results on Tuesday, May 11, 2010 2