Navigation Links
How petals get their shape
Date:4/30/2013

Why do rose petals have rounded ends while their leaves are more pointed? In a new study published April 30 in the open access journal PLOS Biology, scientists from the John Innes Centre and University of East Anglia, UK, reveal that the shape of petals is controlled by a hidden map located within the plant's growing buds.

Leaves and petals perform different functions related to their shape. Leaves acquire sugars for a plant via photosynthesis, which can then be transported throughout the plant. Petals develop later in the life cycle and help attract pollinators. In earlier work, this team had discovered that leaves in the plant Arabidopsis contain a hidden map that orients growth in a pattern that converges towards the tip of the bud, giving leaves their characteristic pointed tips. In the new study, the researchers discover that Arabidopsis petals contain a similar, hidden map that orients growth in the flower's bud. However, the pattern of growth is different to that in leaves - in the petal growth is oriented towards the edge giving a more rounded shape - accounting for the different shapes of leaves and petals. The researchers discovered that molecules called PIN proteins are involved in this oriented growth, which are located towards the ends of each cell.

"The discovery of these hidden polarity maps was a real surprise and provides a simple explanation for how different shapes can be generated," said Professor Enrico Coen, senior author of the study.

The team of researchers confirmed their ideas by using computer simulations to test which maps could predict the correct petal shape. They then confirmed experimentally that PIN proteins located to the right sites to be involved in oriented growth, and identified that another protein, called JAGGED, is involved in promoting growth towards the edge of petals and in establishing the hidden map that determines petal growth and shape.

Unlike animal cells, plant cells are unable to move and migrate to form structures of a particular shape, and so these findings help to explain how plants create differently shaped organs - by controlling rates and orientations of cell growth. From an evolutionary perspective, this system creates the flexibility needed for plant organs to adapt to their environment and to develop different functions.


'/>"/>

Contact: Bryan Ghosh
bghosh@plos.org
44-122-344-2837
Public Library of Science
Source:Eurekalert

Related biology news :

1. The science of spring flowers -- how petals get their shape
2. Disappearing nannies force parents to accept their duties
3. Beavers use their noses to assess their foes
4. Risk management in fish: How cichlids prevent their young from being eaten
5. Tourist-fed stingrays change their ways
6. Tiny minotaurs and mini-Casanovas: Ancient pigmy moths reveal secrets of their diversity
7. Fruit flies force their young to drink alcohol -- for their own good
8. New study shows how seals sleep with only half their brain at a time
9. Horses dont have stage fright -- but their riders do
10. Young malaria parasites refuse to take their medicine, may explain emerging drug resistance
11. Life experiences put their stamp on the next generation: New insights from epigenetics
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/10/2020)... Va. (PRWEB) , ... July 08, 2020 , ... ... Latest on Cell and Gene Therapy Regulation, An FDAnews Webinar, Wednesday, July 22, ... need a comparability study, but what is the most effective way to complete ...
(Date:7/4/2020)... , ... July 03, 2020 , ... ... to earn outstanding recognition and multiple awards for not only the products and ... portfolio, SoME® Skincare and Vivace® Microneedle RF. All the brands built by ABM ...
(Date:7/2/2020)... ... July 02, 2020 , ... ... (MBS) has announced a publication detailing the use of its revolutionary NEXTGENPCR ... chain reaction (RT-PCR) in 16 minutes. The article, titled "Ultra-fast one-step RT-PCR ...
Breaking Biology News(10 mins):
(Date:7/31/2020)... ... July 29, 2020 , ... Diversified Technologies, Inc. has ... be configured to drive Klystrons, TWTs, IOTs, and magnetrons. , DTI Radar ... switches in a push-pull configuration; yielding fast fall time for a capacitive load. ...
(Date:7/31/2020)... ... July 29, 2020 , ... Editas Medicine, Inc. (Nasdaq: ... advanced delivery technologies, development, and manufacturing solutions for drugs, biologics, cell and gene ... strategic partnership whereby Catalent will provide support for the development, manufacturing, and clinical ...
(Date:7/31/2020)... ... 2020 , ... The SDX® Respiratory Gating System , ... reached its 20th anniversary of worldwide use. Introduced in the US over the ... University of Pennsylvania, University of Michigan, University of Maryland, University of California San ...
(Date:7/22/2020)... ... 22, 2020 , ... Join experts from Reed Tech , Gary Saner, ... a one hour live webinar on Thursday, August 13, 2020 at 11am ... and medical devices. Specifically, for medical devices, the NMPA has departments dealing with medical ...
Breaking Biology Technology: