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:8/28/2015)... 28, 2015 According to a ... by Assessment Type (Pen & Paper Based, Hosted, Biometrics), ... Learning, Academic Research), Vertical and Region - Global Forecast ... Market to grow from USD 2.4 Billion in 2015 ... Annual Growth Rate (CAGR) of 25.6% from 2015 to ...
(Date:8/26/2015)... PUNE, India , August 26, 2015 ... (Two, Three, Four, and Five Factor), Application (Travel & ... and Geography - Global Forecast to 2020", published by ... 9.60 Billion by 2020, growing at a CAGR of ... 71 Tables and 82 F igures spread through ...
(Date:8/25/2015)... and BELLEVUE, Wash. , Aug. ... advanced robotic systems, announced today it will unveil its ... vehicle (UGV), at the National Tactical Officers Association Conference ... The Guardian S is the first-ever commercially available ... years of research and in-field trials and is protected ...
Breaking Biology News(10 mins):Cognitive Assessment and Training Market Worth 7.5 Billion USD by 2020 2Cognitive Assessment and Training Market Worth 7.5 Billion USD by 2020 3Cognitive Assessment and Training Market Worth 7.5 Billion USD by 2020 4Multi-Factor Authentication Market Worth 9.60 Billion USD by 2020 2Multi-Factor Authentication Market Worth 9.60 Billion USD by 2020 3Multi-Factor Authentication Market Worth 9.60 Billion USD by 2020 4Multi-Factor Authentication Market Worth 9.60 Billion USD by 2020 5Sarcos to Debut First-of-its-Kind Snake Robot 2Sarcos to Debut First-of-its-Kind Snake Robot 3
... Valladolid (Spain) has analysed 40 brands of beer, discovering that ... beers. Iron is essential to the human diet, but also ... and flavour. According to the analysis carried out by ... from all 5 continents, dark beers have an average free ...
... AUSTIN, Texas Just as the rainy season is driving ... computational model could forecast where outbreaks are likely to occur. ... Centers for Disease Control and Prevention (CDC) on the project, ... most needed in the earthquake-ravaged country. Just back from ...
... team of scientists has identified 29 new genetic variants ... biology of an important and very debilitating neurological disease. ... common neurological conditions among young adults, affects around 2.5 ... attacks the central nervous system (CNS), which includes the ...
Cached Biology News:Dark beer has more iron than pale beer 2Researchers fight cholera with computer forecasting 2Researchers fight cholera with computer forecasting 3Researchers fight cholera with computer forecasting 4Vanderbilt researchers, international team, uncover genes linked to multiple sclerosis 2
(Date:8/27/2015)... Aug. 27, 2015  Neogen Corporation (NASDAQ: NEOG ... of United Kingdom -based Lab M ... media and diagnostic systems. Lab M ... leading provider of microbial testing and diagnostic products for ... The company currently sells into more than 70 countries ...
(Date:8/27/2015)... PARK, Calif. , Aug. 27, 2015  Asterias ... in the emerging field of regenerative medicine, today announced ... investor conferences in the month of September.  ... will present at Rodman & Renshaw,s 17th Annual Global ... ET/7:25am PT at the St. Regis Hotel in ...
(Date:8/27/2015)... -- GlassesOff (OTCBB: GLSO), a visual neuroscience technology ... vision system, announced today a partnership with eight-time All-Star, ... to develop a new mobile app designed for professional ... on-court performance. Vision is the inception of every ... ball or blocking a pass. The critical impact vision speed ...
(Date:8/27/2015)... Aug. 27, 2015 In response to ... UPS and The US Postal Service to no ... as ,select agents, by the CDC, Marken reaffirmed ... these sensitive shipments. Marken uses its ... trained and certified personnel to ensure the safe ...
Breaking Biology Technology:Neogen acquires U.K.-based Lab M Holdings 2Asterias Biotherapeutics to Present at Upcoming Investor Conferences 2Eight-Time All-Star Chris Paul and GlassesOff Partner to Develop Innovative Mobile App Designed to Improve On-Court Performance 2Eight-Time All-Star Chris Paul and GlassesOff Partner to Develop Innovative Mobile App Designed to Improve On-Court Performance 3Marken Ensures Safe Transportation Of Select Agents And Toxins 2
... May 9 ATS Medical, Inc. (Nasdaq:,ATSI), manufacturer ... that it will participate at the Rodman & ... Meridien Beach Plaza,Hotel in Monte Carlo on Tuesday, ... ATS Medical, will present at 9:20 a.m. local ...
... N.J., May 9 Celator Pharmaceuticals today,announced that ... Jackson joined Celator in October 2007 as Head ... Scott as the new CEO. He brings more ... of specialty,pharmaceutical experience primarily in oncology," said Dr. ...
... China, May 9 /Xinhua-PRNewswire-FirstCall/ -- China-Biotics,Inc. (OTC Bulletin ... specializing in the manufacture, research, development,marketing and distribution ... work for its new plant at Qing Pu, ... 150 MT capacity is the cornerstone of our,growth ...
Cached Biology Technology:ATS Medical to Participate at the Rodman & Renshaw 5th Annual Global Healthcare Conference 2Celator(R) Pharmaceuticals Announces Appointment of Scott Jackson as CEO 2China-Biotics, Inc. Completes Foundation for Its New Plant 2
Red Standard is sodium salt of resorufin....
Human Jagged 2 Biotinylated Affinity Purified PAb...
RayBio L Series 507: RayBio Label-based Antibody Array I (2 membranes) Class: Antibody Array Products Product Group: Antibody Array...
The Zymo-Spin PI Fast-Spin column features durable polypropylene construction and is the same column featured in the His-Spin Protein Miniprep. Capacity is 800 l....
Biology Products: