Navigation Links
Secrets in a seed: Clues into the evolution of the first flowers
Date:9/14/2009

y times to form the multi-celled endosperm. However, the chalazal region forms a single-celled haustorium, a structure that absorbs nutrients and ultimately degenerates to form an empty space in the seed. This situation is broadly similar to that of some waterlilies and some monocots but differs from that of many other early-diverging angiosperms such as Amborella, in which the endosperm is formed from the chalazal region.

One of the current hypotheses is that the endosperm originated as a monstrous proembryo that fails to develop into a plant. Rudall and colleagues' observations support this theory.

"Comparative studies of early endosperm development in extant 'basal' angiosperms (including Trithuria) tend to support this theory," Rudall said, "because there are similarities in early development of embryo and endosperm. In both cases, the first cell division produces two distinct domains that differ in their subsequent development." In the embryo, divisions of the chalazal cell produce most of the embryo. The micropylar cell develops into a stalk that attaches the embryo to the seed coat. In the endosperm of Trithuria, the chalazal haustorium may regulate early endosperm development of the micropylar region, in addition to facilitating transfer of nutrients from the perisperm, maternally derived nutritive tissue, to the embryo.

Rudall and colleagues' findings shed some light on the possible role of the endosperm in early angiosperms. "The endosperm of Trithuria, though limited in size and storage capacity, is relatively persistent," Rudall stated. "Coupled with the well-developed perisperm that occurs in Trithuria, this could indicate that the ancestral role of endosperm was to transfer nutrients from the perisperm to the embryo, rather than as a storage tissue."


'/>"/>

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

Page: 1 2

Related biology news :

1. Uncovering the secrets of ulcer-causing bacteria
2. Drug-proof zebrafish reveal secrets of addiction
3. Genetic secrets of date palm unlocked by researchers at Weill Cornell Medical College in Qatar
4. Yale researchers uncover secrets of salmonellas stealth attack
5. Diet secrets of the Royals
6. Scientists unlock the secrets of C. difficiles protective shell
7. Caltech researchers help unlock the secrets of gene regulatory networks
8. DNA testing may unlock secrets of medieval manuscripts
9. Expeditions reveal gulf of Californias deep sea secrets, as well as human imprints
10. Uncovering secrets of life in the ocean
11. Landmark study unlocks stem cell, DNA secrets to speed therapies
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2015)... and Markets ( http://www.researchandmarkets.com/research/wxdglm/global_wearable ) has ... Technologies Market and Applications, Opportunities, Industry Analysis, Segmentation, ... report to their offering. , ... be worn on the user,s body and have ...
(Date:12/22/2014)... Research and Markets ( http://www.researchandmarkets.com/research/fx4bg3/the_global ) ... Global Watermarking and Fingerprinting Markets" report to ... This insight provides an overview ... markets. Watermarking aims to control and monitor piracy ...
(Date:12/19/2014)... VEGAS , Dec. 18, 2014   LaunchKey , ... for the post-password and Internet of Things era, today ... funding. The venture round was led by Metamorphic Ventures ... Rimrock Venture Partners, VegasTechFund, and others.  LaunchKey has raised ...
Breaking Biology News(10 mins):Global Wearable Technologies Market and Applications, Opportunities, Industry Analysis, Segmentation, Size, Growth, Share, Overview, Trends and Forecast 2014-2020 2The Global Watermarking and Fingerprinting Markets 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3
... Cichlid male nannies help out, especially if they,ve been ... Neolamprologus pulcher displays cooperative breeding behavior, where non-parents ... pair. Until now, it was assumed that male subordinates ... published Oct. 12, in the online journal PLoS ...
... available in French . Montreal, October ... funding to advance research in fields ranging from linguistics to ... Chairs were awarded to the following professors who are considered ... at Concordia in the presence of Senator Larry Smith and ...
... A team of investigators from the University of Utah has ... Health (NIH) to fund novel research that may help to ... form of multiple sclerosis. These studies will use an advanced ... who died of primary progressive multiple sclerosis. Multiple sclerosis ...
Cached Biology News:Recognition for 7 Concordia professors 2NIH grant will allow researchers to look for viral cause of most severe form of multiple sclerosis 2
(Date:1/22/2015)... Denville, NJ (PRWEB) January 22, 2015 ... shearing technologies such as the Bioruptor® and complete ... semi-automation system for chromatin immunoprecipitation, alleviating the need ... reagents and controls needed for ChIP of histones ...
(Date:1/22/2015)... Jan. 22. 2015  Varian Medical Systems (NYSE: VAR ... honored for its commitment to sustainability with inclusion on a ... the highest ranked healthcare equipment company among the Corporate Knights ... World Economic Forum at Davos, Switzerland . ...
(Date:12/25/2014)... 2014 The report “Service Quality Management ... & Provider Type - Global Advancements, Worldwide Forecasts & ... in-depth analysis and forecasting of revenues. , Browse ... pages and in-depth TOC on “Service Quality Management (SQM) ...
(Date:12/24/2014)... , Dec. 24, 2014  Vermillion, Inc. (Nasdaq:   ... disease, announced today that the Company closed its ... Investment Management, Jack W. Schuler , Birchview ... were $10.5 million, before offering expenses.  The proceeds ...
Breaking Biology Technology:Diagenode Launches Unique Semi-Automated Solution for Chromatin Immunoprecipitation 2Varian Honored Among World's 100 Most Sustainable Corporations 2Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 2Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 3Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 4Vermillion Announces Closing of Equity Financing 2Vermillion Announces Closing of Equity Financing 3
... The first data to show that Neupro® ... are often impaired by pain related to Restless Legs Syndrome ... of Parkinson,s Disease and Movement Disorders in Buenos Aires, ... that the efficacy of rotigotine remained stable over five years ...
... of the desert floor at a place called Ash Meadows, an ... nowhere else in the world. A new Brigham Young University ... a 15,000-year journey, flowing slowly underground from what is now the ... for four decades, and a crack in the Earth,s crust known ...
... CORD:USE Cord Blood Bank, a public cord blood banking facility, ... month their plans to open a family cord blood bank to ... privately bank their baby,s cord blood.  The Team of experts in ... , Joanne Kurtzberg , John Wagner , Eliane ...
Cached Biology Technology:Neupro® (Rotigotine Transdermal System) Significantly Improved Wellbeing and Daily Activities Impaired Due to Limb Pain Associated With Restless Legs Syndrome 2Neupro® (Rotigotine Transdermal System) Significantly Improved Wellbeing and Daily Activities Impaired Due to Limb Pain Associated With Restless Legs Syndrome 3Neupro® (Rotigotine Transdermal System) Significantly Improved Wellbeing and Daily Activities Impaired Due to Limb Pain Associated With Restless Legs Syndrome 4Neupro® (Rotigotine Transdermal System) Significantly Improved Wellbeing and Daily Activities Impaired Due to Limb Pain Associated With Restless Legs Syndrome 5Neupro® (Rotigotine Transdermal System) Significantly Improved Wellbeing and Daily Activities Impaired Due to Limb Pain Associated With Restless Legs Syndrome 6Neupro® (Rotigotine Transdermal System) Significantly Improved Wellbeing and Daily Activities Impaired Due to Limb Pain Associated With Restless Legs Syndrome 7Neupro® (Rotigotine Transdermal System) Significantly Improved Wellbeing and Daily Activities Impaired Due to Limb Pain Associated With Restless Legs Syndrome 8Neupro® (Rotigotine Transdermal System) Significantly Improved Wellbeing and Daily Activities Impaired Due to Limb Pain Associated With Restless Legs Syndrome 9Neupro® (Rotigotine Transdermal System) Significantly Improved Wellbeing and Daily Activities Impaired Due to Limb Pain Associated With Restless Legs Syndrome 10Leading Cord Blood Experts Clarify Their Support of CORD:USE Family Cord Blood Bank 2
Anti-Goat HRP-DAB Cell & Tissue Staining Kit...
... Chemicon's 3243 provides all the materials necessary for ... in CMV antigen studies analysis. Kit Components: ... (Catalog No. 5122) One bottle containing 220 mL ... Fixation Solution (5X) - (Catalog No. 5113) One ...
ANTI NO-TRYPTOPHAN CONJUGATE...
GOAT ANTI SLI...
Biology Products: