Navigation Links
High construction cost for cycads
Date:7/23/2009

Thomas Marler recently published the results of his research that reveal some of the attributes of the long-lived leaves of Guam's Cycas micronesica plants. "These leaves are relatively large and are constructed of tough tissues," said Marler. "Both of these factors indicate the construction costs of this leaf form are substantial."

Green leaves must pay back their own construction costs, but each leaf is also required to supply the energy needed to maintain its live tissues throughout its lifespan. Additionally, large plants like Guam's Cycas have an abundance of non-green tissue that requires energy to maintain. Therefore, large plants with this leaf construction strategy must also possess a payback strategy that allows recovery of these costs coupled with an excess in food synthesis to support plant growth.

"These phenomena are understood using a financial analogy where borrowing a modest amount of money for one investment strategy is much easier to pay back and less risky than borrowing a substantial sum of money for a different investment strategy," said Marler. "The manufacture of food by the leaf is analogous to the income generated from the investments."

Results of the research indicate these plants approach the substantial leaf construction investments by delaying the decline in food synthesis capacity that accompanies the leaf aging process. Many fast-growing species, for example, constantly replace their leaves. For these species, food synthesis may be reduced to negligible levels in less than one month after leaf construction. In contrast, the decline in food synthesis for leaves of Guam's Cycas is minimal, with rates of two-year-old leaves sustained at 80% of the initial maximum. Marler indicates this sluggish pace of decline is 65-80 times slower than other species for which this trait has been determined.

The financial risk analogy illuminates a critical environmental issue because Gua
'/>"/>

Contact: Cathleen Moore-Linn
cmoore@uguam.uog.edu
University of Guam
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Texel paleothermometer for climate reconstruction perfected
2. Vaginal reconstruction not needed for most inter-sex females, Hopkins study shows
3. Researchers take first steps towards spinal cord reconstruction following injury
4. The construction of heart modelling leads path to new therapies
5. Sea cliff erosion, hemp construction materials and more at UCSD Engineering Conference
6. Ancient DNA: reconstruction of the biological history of Aldaieta necropolis
7. Stevens assists enXco with construction of solar photovoltaic system
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
High construction cost for cycads
(Date:8/19/2014)... is available in German . ... intermittent energy sources. If a large amount of electricity is ... excess energy will have to be stored during productive periods ... storage capacities are far from adequate for the purpose. Science ... important focus lies on battery systems that used to be ...
(Date:8/19/2014)... not a monkey. It,s not a lemur. It,s not an ... Philippine tarsier: a tiny, adorable and downright "cool" primate from ... Americans are familiar with," said Rafe Brown, curator-in-charge at the ... and ears; an extremely cute, furry body; a long tail ... fingers and toe tips that look a bit like the ...
(Date:8/19/2014)... measurements from fish purchased at retail seafood counters ... which mislabeling can expose consumers to unexpectedly high ... stock "substitutions"which falsely present a fish of the ... the most dangerous mislabeling offense, according to new ... , "Accurate labeling of seafood is essential to ...
Breaking Biology News(10 mins):Asian inventions dominate energy storage systems 2Asian inventions dominate energy storage systems 3Philippine tarsier gets boost from Kansas research, and genetic proof of a new variety 2Philippine tarsier gets boost from Kansas research, and genetic proof of a new variety 3Seafood substitutions can expose consumers to unexpectedly high mercury 2Seafood substitutions can expose consumers to unexpectedly high mercury 3
... lives at extremely high temperatures could help understand structures ... Biology Laboratory (EMBL) and Heidelberg University, both in Heidelberg, ... genome of a heat-loving fungus, and used that information ... inner ring of the nuclear pore. The study was ...
... The development of a new cell-culture system that ... become coated with protective myelin opens up new avenues ... myelin regulates a key protein involved in sending long-distance ... characterized by damage to the myelin sheath surrounding nerve ...
... Exonhit (Alternext: ALEHT), a biotech company focused on ... are pleased to announce the successful completion of a ... to an additional strategic preclinical animal model species. ... gene deregulation and the expanding interest in developing biomarkers ...
Cached Biology News:A hot species for cool structures 2MS research: Myelin influences how brain cells send signals 2MS research: Myelin influences how brain cells send signals 3MS research: Myelin influences how brain cells send signals 4
(Date:8/20/2014)... N.C. , Aug. 20, 2014 ... research services located in Raleigh, NC ... Bradford Evans as Vice President of Administration. ... Brad will oversee all corporate processes, including their ... joining Clintrax Global, Brad worked as an HR ...
(Date:8/20/2014)... , Aug. 20, 2014 Neurotrope, Inc. ... a conference call to provide an update on ... Eastern daylight timeDial-in numbers:(888) 505-4369 (U.S. and Canada) ... web cast: www.neurotropebioscience.com , under "Investor Relations"The teleconference ... completion through September 2, 2014 at (888) 203-1112 ...
(Date:8/20/2014)... CA (PRWEB) August 20, 2014 The ... is being held on October 29-30 in San ... from industry, academic and government researchers and clinicians focused ... the space. , In the twelve years since ... hundred therapies have been introduced with pharmacogenetic information in ...
(Date:8/20/2014)... Cranford, NJ (PRWEB) August 20, 2014 ... solutions, announced today that it has expanded its myPROpad™ ... of the EQ-5D-5L, one of the most widely ... for measuring general health status. The EQ-5D is used ... to generate a measure that can be used to ...
Breaking Biology Technology:Clintrax Global, Inc. Announces Addition to Executive Team 2Neurotrope To Host Conference Call 26th Annual Personalized and Precision Medicine Conference Bringing Together Thought Leaders to Discuss Clinical Implementation, Dx Reimbursement, Big Data, and Sequencing 2EQ-5D™ Assessment Now Available for iPad 2
... (NASDAQ: QCOR ) announced today that executive management ... be held on February 15-16, 2012 in New York.  Steve ... to present an overview of the Company on Thursday, February ... live webcast and subsequent archived replay of the presentation will ...
... a leading global provider of distributed and specialty ... in the "Drive for Innovation" tour, sponsored by ... "pit stop" during the tour,s recent swing through ... role in powering innovation by companies driving technological ...
... in the light like the scales on a butterfly,s ... a revolutionary new approach to point-of-care medical diagnostics, according ... Design Engineering . Thomas Schalkhammer and colleagues at ... Palkovits of the University of Applied Sciences, in Wiener ...
Cached Biology Technology:Questcor Pharmaceuticals to Present at the Leerink Swann Global Healthcare Conference on February 16, 2012 2Micross Components Hosts Stop on "Drive for Innovation" Tour 2The butterfly effect in nanotech medical diagnostics 2