Navigation Links
Which came first, bi- or tricellular pollen? New research updates a classic debate
Date:5/2/2014

plants, and is particularly interested in the evolution of development of ancient flowering plants. As part of the Centennial Celebration of the American Journal of Botany, Williams and co-authors (University of Tennessee and Creighton University) decided to re-examine the core questions that Brewbaker tested using modern, updated phylogenies and many more species than Brewbaker had available to him 50 years ago (http://www.amjbot.org/content/101/4/559.full.pdf+html).

"I think many of us who did their graduate work during the '60s through the early '90s saw our first flowering plant phylogenetic tree when we opened the October 1967 issue of American Journal of Botany to Jim Brewbaker's two-page-wide tree comprising 265 families," comments Williams (http://www.jstor.org/stable/2440530?seq=4). "That he had only constructed the phylogeny to answer a question about the evolution of pollen development was even more impressive."

"Our Centennial Review paper moved from being a straightforward review to a research paper," explains Williams, "because new methods for studying evolutionary rates of binary traits had just come out, and I thought: Why not redo Brewbaker's analysis with modern methods? Coincidentally, we had been collecting data on pollen cell number for the last seven years, so we had a great dataset in hand. To his credit, Brewbaker had already anticipated all the important questions, so you could say that our paper just added clarity to the nearly 50-year-old answers he suggested."

Indeed, Williams and co-authors expanded the Brewbaker dataset by including 2,511 species for which they modeled trait evolution (tri- vs bicellular pollen) using a modern (2013) seed plant phylogeny and two different sets of analyses.

Much to their surprise, the results from th
'/>"/>

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

Page: 1 2 3 4

Related biology news :

1. Researchers uncover molecular pathway through which common yeast becomes fungal pathogen
2. Which plants will survive droughts, climate change?
3. Scientists uncover mechanism by which plants inherit epigenetic modifications
4. CSHL-led team discovers new way in which plants control flower production
5. Researchers identify proteins that indicate which kidney tumors are most likely to spread
6. Gladstone scientists discover novel mechanism by which calorie restriction influences longevity
7. Which nutritional factors help preserve muscle mass, strength and performance in seniors?
8. Video study shows which fish clean up coral reefs, showing importance of biodiversity
9. BUSM study reveals novel mechanism by which UVA contributes to photoaging of skin
10. Scientists sequence genome of sacred lotus, which likely holds anti-aging secrets
11. Mechanism discovered which aids Legionella to camouflage itself in the organism
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Which came first, bi- or tricellular pollen? New research updates a classic debate
(Date:4/27/2015)... OXFORD, Conn. , Apr. 27, 2015 ... "Company"), a biometric authentication company focused on the growing ... will commence shipping to pre-order customers the first week ... pre-orders through the month of May. ... is a significant milestone for the company as Wocket® ...
(Date:4/17/2015)... Canada , April 17, 2015 ... growing security concerns, and technological advancement to drive ... until 2020   According ... Saudi Arabia Biometric Systems Market Forecast &  Opportunities, 2020 ", biometric systems ... is projected to register growth at CAGR of ...
(Date:4/10/2015)... , April 10, 2015 Research ... of the "Security Competitive Profiles - NEC" ... , NEC will continue to supply a ... the market, with a company focus on the development ... Winning opportunities in the Asia-Pacific ...
Breaking Biology News(10 mins):Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 2Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 3Saudi Arabia Biometric Systems Market to Grow at 22% Through 2020, Says TechSci Research 2Saudi Arabia Biometric Systems Market to Grow at 22% Through 2020, Says TechSci Research 3NEC Security Competitive Profile 2015 2
... To promote the health of at-risk teenagers in Newark and ... The Horizon Foundation for New Jersey. ... to teach middle and high school students about nutrition, physical ... carried out by the Consortium for Pre-College Education in Greater ...
... of Anatomists has chosen Springer to publish its official ... issue will be published at Springer in April 2009. ... Anatomical Science International focuses on the morphological ... cellular, histological and gross anatomical studies. In addition ...
... world, nitrogen compounds are released to the atmosphere ... These pollutants are deposited to ecosystems as precipitation, ... downwind of their release point. The Catskill Mountains ... pointthough they contain little in the way of ...
Cached Biology News:Anatomical Science International joins Springer's publishing program 2Tree species composition influences nitrogen loss from forests 2
(Date:5/1/2015)... , May 1, 2015 ... equities: Genetic Technologies Ltd (NASDAQ: GENE ), ... Fisher Scientific Inc. (NYSE: TMO ), Sequenom ... (NYSE: PKI ). Free research report on ... . On Thursday, April 30, 2015, the NASDAQ ...
(Date:5/1/2015)... and RESEARCH TRIANGLE PARK, N.C. , May ... announced today that Roger Jeffs , Ph.D., President and ... and update on the company,s business at the Deutsche Bank ... Boston, Massachusetts . The presentation will take ... Time, and can be accessed via a live webcast on ...
(Date:4/30/2015)... 2015   Tamir Biotechnology , a leading developer ... its Ebola antiviral therapy program. Clinical ... currently being evaluated and considered by a number of ... During the first quarter of 2015, the company participated ... The Evaluation of Potential Treatments and Vaccines For Ebola ...
(Date:4/30/2015)... Nitto Avecia, a leading biotechnology ... capacity and production capability to serve biotechnology pharmaceutical ... service fulfillment continues to drive Nitto Avecia to ... capacities. , In Fall 2014, Nitto ... equipment at its Milford, MA facility, which is ...
Breaking Biology Technology:Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 2Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 3Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 4Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 5Tamir Biotechnology Provides Update on TMR004 Development Against Mutating Ebola 2Tamir Biotechnology Provides Update on TMR004 Development Against Mutating Ebola 3Tamir Biotechnology Provides Update on TMR004 Development Against Mutating Ebola 4Biotechnology Manufacturer Nitto Avecia Expands Capacity to Meet Client Demand 2
... supercomputer relies on off-the-shelf chips, open-source OS , ,Chippewa ... (SGI) in more ways than one. , ,As the companys ... back door in the final days of its fiscal first ... latest flagship product, the Altix 3000 family of servers and ...
... Madison , ,MADISON, WI- The University of Wisconsin ... eWeek, a weekly magazine for information technology executives, to ... enterprise computing solutions. , ,The testing took place ... the University of Wisconsin-Extension Pyle Center. The testing criteria ...
... Tucked away in a basement at Menasha Advantage, ... center its staff affectionately calls The Skunkworks. There, a ... of Radio Frequency Identification technology, Menasha Advantage is building ... a supply chain to another. The Internet-based system will ...
Cached Biology Technology:SGI banking on Altix to pay the freight 2SGI banking on Altix to pay the freight 3Six Spam Fighters Face Off in Madison 2Six Spam Fighters Face Off in Madison 3Six Spam Fighters Face Off in Madison 4E-Commerce Skunkworks in Menhasa 2E-Commerce Skunkworks in Menhasa 3
... 75 x ... recommended for immunohistochemistry of paraffin-embedded sections, ... at one end, markings ... normal procedures, precleaned, ...
1000X solution used for inducing CopyControl™ based vectors to high copy numbers...
Donor feline serum and plasma...
Request Info...
Biology Products: