HOME >> BIOLOGY >> NEWS
A small leak will sink a great ship

During flowering four different types of floral organs need to be formed: sepals, which protect the inner organs; the frequently ornamental petals; stamens, which produce pollen and the carpels. This process is orchestrated by a large number of genes. Scientists at the Max Planck Institute for Plant Breeding Research in Kln (Germany) found, in cooperation with colleagues in Nijmegen (Netherlands) that a small molecule, a so-called microRNA, is crucial for the control of floral organs identity (Nature Genetics, June 24, 2007).

Flowers of higher plants are built in a similar pattern: their outermost whorl is composed of sepals, which protect the young bud, thereafter comes a whorl of often colorful petals attracting insect pollinators, followed by a whorl of stamens with pollen sacks and the innermost whorl holds carpels, which later give rise to the fruit and seeds. This basic architecture is comparable in higher plants prompting the question after common components of a genetic 'masterplan.'

Scientists in the group of Zsuzsanna Schwarz-Sommer investigated a mutant of snapdragon where stamens form instead of petals (Fig. 1). Interestingly, a strikingly similar mutant occurs in another plant species, in Petunia. 'We already suspected some ten years ago when we first looked at these mutants that in the two species a similar defect might disturb the genetic control resulting in the 'wrong organ at the wrong place' explains Mrs. Schwarz-Sommer. A similar example is well known in the fruit fly where a mutant carries a pair of legs at the head instead of the two antennae.

Indeed, experiments performed by the German and Dutch scientists showed that in the two plant species mutation in the same gene conferred altered identity to the floral organs. This gene turned out to code for a microRNA, a small ribonucleic acid consisting of little more than 20 nucleotides. MicroRNAs can recognize and bind to complementary sequences present in mess
'"/>

Contact: Dr. Zsuzsanna Schwarz-Sommer
schwarzs@mpiz-koeln.mpg.de
49-221-506-2140
Max-Planck-Gesellschaft
26-Jun-2007


Page: 1 2

Related biology news :

1. Is nutrient loading a smaller problem than we think?
2. Consumption of small amounts of dark chocolate associated with reduction in blood pressure
3. Fever after smallpox vaccination tied to individual genetic variations
4. University of Liverpool launches 10 million small animal teaching hospital
5. Study shows big power of small RNAs, not just proteins, in halting cancer
6. New algorithms classify outcomes of nonsmall cell lung cancer patients
7. Cisplatin is more effective than carboplatin for treating nonsmall cell lung cancer
8. Innovative smallpox vaccine research study to be conducted at Case Medical Center
9. Enzyme delivered in smaller package protects cells from radiation damage
10. Why small dogs are small
11. Penn scientists engineer small molecules to probe proteins deep inside cell membrane

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: small leak will sink great ship

(Date:11/18/2014)... WASHINGTON , Nov. 18, 2014  The ... Security Industry Association today jointly announce the formation ... and release of its Identity and Biometric ... (Framework). The Framework received official support from BORDERPOL, ... governments to improve and provide expertise regarding border ...
(Date:11/12/2014)... 12, 2014 Crossmatch™, a leading provider of ... ® fingerprint readers have been deployed throughout Montparnasse ... Central Mexico . The bakery chain implemented the ... issues caused by employees clocking in for each other. ... readers, Montparnasse relied on paper timecards and a mechanical ...
(Date:11/7/2014)... , November 6, 2014 Leading Biometric ... better mobile security revolutionizing online transactions.  Companies in focus today ... Ltd. (NYSE: BABA ), Google Inc. (NASDAQ: ... eBay Inc. (NASDAQ: EBAY ) and MasterCard Inc. ... and NXTDW), a biometric authentication company focused on the ...
Breaking Biology News(10 mins):Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 2Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 3Montparnasse Pasteleria Achieves Time and Attendance Transparency with Crossmatch U.are.U Fingerprint Readers 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 3Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 4Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 5Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 6
(Date:11/21/2014)... 20, 2014 Polaris Group announced today ... its Phase 1 trial of ADI-PEG 20 in ... of malignant pleural mesothelioma (MPM) and non-squamous non-small ... trials on ADI-PEG 20, both as monotherapy and ... of several other indications, including breast cancer, melanomas, ...
(Date:11/21/2014)... , Nov. 20, 2014 /PRNewswire/ - BIOREM Inc. (TSXV: BRM) ("Biorem" or ... month periods ended September 30, 2014.  Biorem,s complete 2014 third quarter ... ). Financial Summary:Three-months ended September 30, , ... share data) , 2014 , 2013 ... , 5,281 , 6,715 , ...
(Date:11/18/2014)... 2014 Cirrascale Corporation ®, ... and rackmount computing infrastructure, today announced it will ... throughout its GPU-enabled blade server and high-performance workstation ... latest proprietary 80-lane Gen3 PCIe switch-enabled risers, the ... K80 dual-GPU accelerator cards in a single blade, ...
(Date:11/18/2014)... New Brunswick, NJ (PRWEB) November 18, 2014 ... of Data Quality and Transparency Reporting solutions, announced ... has gone live using its Consummate Providerâ„¢ solution ... Consummate Providerâ„¢ is a Global, SaaS based, Data ... Science organizations and their third party Providers improve ...
Breaking Biology Technology:Polaris Group Announces Treatment of First Patient in Phase 1 Study of ADI-PEG 20 plus Pemetrexed and Cisplatin in Malignant Pleural Mesothelioma And Non-Squamous Non-Small Cell Lung Carcinoma 2Biorem Reports Third Quarter Results 2Biorem Reports Third Quarter Results 3Cirrascale® Expands Multi-GPU Peering Solutions with Support for New NVIDIA Tesla K80 Dual-GPU Accelerators 2Cirrascale® Expands Multi-GPU Peering Solutions with Support for New NVIDIA Tesla K80 Dual-GPU Accelerators 3Alanda Software Completes Successful Implementation of Global Data Quality & Vendor Management Solution for Top Tier Global Biopharmaceutical Company 2
Cached News: