Navigation Links
Being small has its advantages, if you are a leaf
Date:7/6/2011

fessor Herv Cochard from France's University of Clermont-Ferrand and a member of the Institut National de Recherche Agronomique, to construct three-dimensional computer models of leaves' venation systems. They then simulated the impact of embolism on water transport for leaves of different sizes and vein architectures.

The biologists found a distinct difference in function between the major veins, which tend to show a branching pattern, and the minor veins, which form a grid embedded within the leaf and make up most of the leaf's total vein length. Blocking the major veins had a huge impact on leaf function but one that could be remedied by having additional, redundant major veins.

Scoffoni likens the major veins to a superhighway and the minor veins to sinuous city roads, where embolism is like an accident causing a major slowdown.

"If an air bubble forms in the leaf's water pathway, the more alternate highways the vein system has to offer, the less the leaf will be affected by these accidents," Scoffoni said.

The UCLA biologists including co-authors Michael Rawls, an undergraduate student, and Athena McKown, a postdoctoral scholar in ecology and evolutionary biology tested diverse leaves from very wet and dry areas, all planted near the UCLA campus. The leaves fit the pattern: The biologists found that smaller leaves indeed had more tightly packed major veins and were more resistant to the effects of embolism in the major veins. The were better able to maintain water transport, even during extreme drying, Sack said.

While the trend of smaller leaves in drier areas is so striking that it appears in textbooks, and the trend is used by scientists to estimate rainfall in the distant past from the size of fossil leaves, the mechanism had never been explained. The previous theory proposed an indirect linkage, arguing that smaller leaves have a thinner layer of still air around them, which allows them to cool off fa
'/>"/>

Contact: Stuart Wolpert
swolpert@support.ucla.edu
310-206-0511
University of California - Los Angeles
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. BUSM names Deborah Frank, M.D., inaugural professors in child health and well-being
2. Inability to cry in patients with Sjogrens syndrome affect emotional and mental well-being
3. Its not easy being green
4. Missouri elk are being reintroduced in the wrong part of the state, MU anthropologist says
5. DNA stretching -- A new technique being carried out at CIC microGUNE to detect illnesses
6. Plant breeding is being transformed by advances in genomics and computing
7. Sensors to detect explosives, monitor food being developed at UH
8. Being good moms couldnt save the woolly mammoth
9. Study suggests that being too clean can make people sick
10. Biodiesel from sewage sludge within pennies a gallon of being competitive
11. Selected highlights of the research being presented at the Experimental Biology 2010 meeting
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/14/2015)... , May 14, 2015 Research and Markets ... the "Fingerprint Sensors Market in Smart Mobile Devices ... report believes that 2014 was a watershed year for ... introduction of ,Apple Pay,. Apple gave fingerprint sensors a ... payment service. Fingerprint sensors are a must-have feature in ...
(Date:5/10/2015)... -- Fingerprint Cards (FPC) has received an order ... distributor World Peace Industrial Group (WPI), part of WPG Holdings. ... . Deliveries are planned to take place during Q3 ... in China . The order value of ... + 1 000 MSEK for 2015.   Jörgen Lantto, ...
(Date:4/27/2015)... , April 27, 2015  For more than ... trade show has been the premier worldwide event for ... 2015 is a must-attend event for any local, national, ... into the emerging commercial markets and current applications of ... innovations of this projected $48 billion industry, and how ...
Breaking Biology News(10 mins):Global Smart Mobile Devices Fingerprint Sensors Market 2015-2019: Key Vendors are Authentec, Validity Sensors, Fingerprint Cards, Next Biometrics Group. IDEX, and Qualcomm 2Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 235 Million 2UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 2UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 3UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 4UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 5
... scientists at Queen,s University Belfast, which is transforming the ... being used to create safer drinking water in the ... Removal removes arsenic from groundwater without using chemicals. ... Indian engineers led by Dr Bhaskar Sen Gupta in ...
... it that the same teams seem to dominate the annual ... same small group of institutions seem to top annual best-college ... University engineer, these hierarchies are not only natural, but predictable. ... or smaller and smaller branches grow out from a single ...
... is available in French . MONTREAL, March ... who suffer a rare genetic disease, researchers have discovered how ... will improve our understanding of many disorders such as foetal ... cancer. "As a result of the Human Genome Project, we ...
Cached Biology News:Queen's University scientists behind safer drinking water in US 2Is March Madness always the same? 2Is March Madness always the same? 3Researchers looking at a rare disease make breakthrough that could benefit everyone 2Researchers looking at a rare disease make breakthrough that could benefit everyone 3
(Date:5/26/2015)... 2015 Pharmaco-Kinesis Corporation (PKC) announced today that ... Shutters on the Beach in Santa Monica, ... the Company,s innovative Metronomic Biofeedback Pump (MBP), a fully ... over time to a target site of the human ... system in real-time.  ...
(Date:5/26/2015)... mája 2015 Kevin Xu , ... prezidentom Barackovi Obamovi a Billovi Clintonovi za ich ... Dr. Rongxiang Xu , otca Kevina. ... Dr. Xu bol pionier, inovátor, humanitárny pracovník ... v oblasti vedy a príkladné vedenie svojej komunity ...
(Date:5/26/2015)... 26, 2015  Asterias Biotherapeutics, Inc. (NYSE MKT: AST), ... regenerative medicine, today announced that all outstanding common share ... prior to their expiry on June 15, 2015, resulting ... "We thank our shareholders for their continued ... of Asterias. "This exercise of warrants represents a strong ...
(Date:5/26/2015)... TORONTO , May 26, 2015 /PRNewswire/ - Fluorinov ... appointment of Luke M. Beshar to its ... adding financial and pharmaceutical industry expertise as Fluorinov accelerates ... of the Fluorinov team, it is a pleasure to ... had a significant impact on the strategy, financial strength ...
Breaking Biology Technology:Pharmaco-Kinesis Corporation Convenes Third Neuro-Oncology Clinical Advisory Board Meeting 2Pharmaco-Kinesis Corporation Convenes Third Neuro-Oncology Clinical Advisory Board Meeting 3Pharmaco-Kinesis Corporation Convenes Third Neuro-Oncology Clinical Advisory Board Meeting 4Pharmaco-Kinesis Corporation Convenes Third Neuro-Oncology Clinical Advisory Board Meeting 5Dr. Rongxiang Xu, O legende 2Asterias Biotherapeutics Receives $11.7 Million in Proceeds from Exercise of Warrants 2Asterias Biotherapeutics Receives $11.7 Million in Proceeds from Exercise of Warrants 3Luke M. Beshar Appointed to Fluorinov Pharma Board of Directors 2Luke M. Beshar Appointed to Fluorinov Pharma Board of Directors 3
... Israel, March 18 XTL Biopharmaceuticals Ltd. (Nasdaq: ... its Extraordinary General Meetings ("EGMs") held earlier today.All of ... board of directors consists of Mark Allouche, Dafna Cohen, ... Amit Yonay was also appointed Chairman. Dafna Cohen ...
... Wright, Co-Chair of the Alliance for Biosecurity and ... before the House Labor, Health and Human Services, ... of developing drugs, vaccines and other medical countermeasures ... catastrophic health emergencies. Effective medical countermeasures for many ...
... Bulletin Board: CSBR), a company engaged in the development ... enhance the value of oncology drugs, reports its financial ... 2009. Full details of the Company,s financial results ... www.championsbiotechnology.com . Total revenues for the third quarter of ...
Cached Biology Technology:Extraordinary General Meetings Statement -- XTL Also Announces Board and Management Changes 2Alliance for Biosecurity Testifies Before Congress on Funding for Medical Countermeasure Development 2Champions Biotechnology Reports Fiscal 2009 Third Quarter Financial Results 2Champions Biotechnology Reports Fiscal 2009 Third Quarter Financial Results 3Champions Biotechnology Reports Fiscal 2009 Third Quarter Financial Results 4Champions Biotechnology Reports Fiscal 2009 Third Quarter Financial Results 5Champions Biotechnology Reports Fiscal 2009 Third Quarter Financial Results 6
... The complete SSCP kit provides all the ... detection by single-stranded conformation polymorphism analysis (SSCP) ... The kit includes a cooling finger adaptor ... provided), 2 sets of 20 cm plates, ...
...
...
...
Biology Products: