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

will be happy," said Christine Scoffoni, a UCLA doctoral student in the department of ecology and evolutionary biology and lead author of the research. "But when one of these three fundamental resources becomes scarce, the plant will have to find a way to cope with it or die, because there is no escape. Coping with drought can be a strong selective factor on leaf form, especially on size and their venation."

"When we ask our students in plant physiology class why plants need water, their first answer is for growth," Sack said. "They are amazed to learn that the bulk of the water used by a plant is actually to make up for the water lost through transpiration, which would otherwise dry out the leaves. When the leaves open the small pores on their surface, the stomata, to capture carbon dioxide for photosynthesis, water is lost to the dry atmosphere. To stay moist inside, the plants need to replace the water lost by evaporation."

To do this, plants need to maintain the continuity of water in their "pipe delivery system," even as water is being pulled up by the leaves to replace water that has been lost to the air. This places tension on the water in the pipe system, known as the xylem, which runs through the roots and stem and into the leaf veins. And that continuity is challenged by dry soil, Sack explained.

"The less water in the soil, the more the leaves have to pull to get some out, so stronger tension starts building in the plant's pipes," Scoffoni said. "At a certain level of tension, an air bubble is pulled in from outside, blocking the flow of water. One way for a plant to withstand drought is to tolerate many of these embolisms."

Having more major vein routes by which water can flow around the air bubble provides this ability. Smaller leaves, possessing more major veins spaced closely together in a given square centimeter, have this ability, Sack said.

To test this idea, the UCLA team collaborated with pro
'/>"/>

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:11/3/2014)... Research and Markets has announced the ... Markets and Companies" to their offering. ... which have already started to play an important role in ... the old fashioned bone marrow transplants. Role of cells in ... become a part of medical practice. Stem cells ...
(Date:11/3/2014)...  NeuroSigma ® , Inc. (NeuroSigma), a ... on commercialization of its non-invasive Monarch ... neurological and neuropsychiatric disorders, announced today that the ... Notice of Allowance for Mexican Patent Application No. ... and the Regents of the University of California ...
(Date:11/2/2014)... of Physics World , James Dacey explores the ... death" to take their innovations from the lab into ... challenge facing all start-up companies as they move from ... of two main factors: physics-based inventions are usually far ... out to be a lot more complicated than had ...
Breaking Biology News(10 mins):Global Cell Therapy - Technologies, Markets and Companies: 2014 Report 2Global Cell Therapy - Technologies, Markets and Companies: 2014 Report 3NeuroSigma Receives Notice of Allowance from the Mexican Institute of Industrial Property Covering Subcutaneous Trigeminal Nerve Stimulation (sTNS) 2NeuroSigma Receives Notice of Allowance from the Mexican Institute of Industrial Property Covering Subcutaneous Trigeminal Nerve Stimulation (sTNS) 3The 'valley of death' facing physics start-ups 2
... Ariz. (Sept. 13, 2012) -- Shane Snyder, who earlier ... Water Works Association (AWWA), has been invited to present ... 3,500 at the 2012 International Water Association,s (IWA) World ... professor,s presentation will focus not only on his research ...
... Scientists have found the answer to why female killer whales have ... their adult sons. Led by the Universities of Exeter and York ... the research shows that, for a male over 30, the death ... his death within the following year. The reason for the ...
... of bioengineering at Stanford University, has won a Director,s ... award includes a five-year, $2.5 million grant to be ... to affect a broad area of biomedical or behavioral ... to explore the use of synthetic biology platforms and ...
Cached Biology News:UA engineering professor Shane Snyder to speak in Korea on international water quality 2Long menopause allows killer whales to care for adult sons 2Long menopause allows killer whales to care for adult sons 3
(Date:11/24/2014)... November 24, 2014 2014 Deep ... Industry is a professional and in-depth research report ... Dihydrazide information, like its definition, classification, application, and ... This report covers the international market analysis, including ... as the US, Europe, Asia, China, Japan etc. ...
(Date:11/23/2014)... (PRWEB) November 23, 2014 Apiscent ... supplier of fine chemical ingredients to the global ... launch of its new website, Apiscent.com. , The ... Apiscent Labs, clean design, easy navigation, rotating images ... Apiscent Labs stand out. , The ...
(Date:11/22/2014)... CannLabs, Inc. (OTCQB: CANL), ... scientific testing methodologies relating to cannabis, today announced that ... of credit from an existing stockholder of the Company. ... this commitment from one of our existing stockholders,” stated ... capital will help accelerate our planned expansions into the ...
(Date:11/22/2014)... 22, 2014 Respiratory therapy students ... proper management of life-like respiratory ailments using the ... . Grand Rapids-based, Michigan Instruments Inc. developers of ... of the respiratory simulation units to the pro-gram, ... Valley and Muskegon Community College are collaborating to ...
Breaking Biology Technology:Adipic Dihydrazide Industry 2019 Research Forecasts on Worldwide, China Regions Now Available at ReportsnReports.com 2Adipic Dihydrazide Industry 2019 Research Forecasts on Worldwide, China Regions Now Available at ReportsnReports.com 3CannLabs Secures $750,000 Line Of Credit 2Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 2Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 3
... proxy, FOR the Election of, Two ... May 15 /PRNewswire/ - The Concerned Shareholders of Biovail ... (TSX:BVF) continues to mislead its shareholders by making the ... requisition was simply about governance reform and has already ...
... Nile Therapeutics, Inc. (Nasdaq: NLTX ... therapeutics for heart failure patients, received notification from the ... has released the Company,s CD-NP development program from clinical ... the FDA the finalized protocol for the Company,s planned ...
... Trials of Carfilzomib in Relapsed/Refractory Multiple Myeloma and Advanced ... 15 Proteolix, Inc. today announced that data from ... solid tumors will be presented at the 2009 Annual ... being held May 29 - June 2, 2009 in ...
Cached Biology Technology:The Concerned Shareholders of Biovail Say Biovail Has Misled Shareholders 2The Concerned Shareholders of Biovail Say Biovail Has Misled Shareholders 3The Concerned Shareholders of Biovail Say Biovail Has Misled Shareholders 4The Concerned Shareholders of Biovail Say Biovail Has Misled Shareholders 5The Concerned Shareholders of Biovail Say Biovail Has Misled Shareholders 6The Concerned Shareholders of Biovail Say Biovail Has Misled Shareholders 7Nile Therapeutics CD-NP Clinical Program for Acute Heart Failure Released From Clinical Hold by FDA 2Nile Therapeutics CD-NP Clinical Program for Acute Heart Failure Released From Clinical Hold by FDA 3Proteolix to Present Carfilzomib Clinical Data During the 2009 ASCO Annual Meeting 2Proteolix to Present Carfilzomib Clinical Data During the 2009 ASCO Annual Meeting 3
SlowFade Antifade Kit with DAPI...
...
... SAGE (serial analysis of ... genome-wide expression analysis. Expression profiles ... enough to detect low-abundance transcripts ... novel genes. The I-SAGE Kit ...
Mycoplasma tested...
Biology Products: