• HOME
  • NEWS
    • BIOENGINEERING
    • SCIENCE NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • FORUM
    • INSTAGRAM
    • TWITTER
  • CONTACT US
Friday, June 24, 2022
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
    • BIOENGINEERING
    • SCIENCE NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • FORUM
    • INSTAGRAM
    • TWITTER
  • CONTACT US
  • HOME
  • NEWS
    • BIOENGINEERING
    • SCIENCE NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • FORUM
    • INSTAGRAM
    • TWITTER
  • CONTACT US
No Result
View All Result
Bioengineer.org
No Result
View All Result
Home NEWS Science News

To bloom or not to bloom: That is the question

Bioengineer by Bioengineer
December 19, 2016
in Science News
0
Share on FacebookShare on TwitterShare on LinkedinShare on RedditShare on Telegram
IMAGE

Credit: IBS

When spring is approaching, how do plants decide that it is time to flower? A team of plant scientists led by KWAK June M. at the Center for Plant Aging Research, within the Institute for Basic Science (IBS) unravelled a new mechanism to explain this seemingly easy, but actually complicated question. Their research was published in the Proceedings of the National Academy of Sciences (PNAS) on November 11, 2016.

While some animals hibernate, seek refuge or fly to warmer climates during the coldest months of the year, plants are unable to move freely, therefore try to overcome environmental stresses by timing their physiological processes. And for this, epigenetics comes to hand. "Plants that bloom too early risk unsuccessfully reproducing. Therefore plants have developed an epigenetic mechanism that regulates their flowering timing," explains KIM Yun Ju, first and corresponding author of this study.

In order to study flowering, IBS scientists used Arabidopsis thaliana, a small plant related to mustard. Arabidopsis has small white flowers originating from floral stem cells. The stem cells are maintained at an initial stage of development, then differentiate into four sepals, four petals, six stamens and two fused carpels.

Epigenetic regulation is one of the major mechanisms to control flowering time. It regulates gene expression through chemical modifications of DNA and its interacting proteins, but without changing the DNA sequence. If you think of the DNA contained in each cell as a big book that contains all the information, these chemical modifications can be thought as bookmarks that tell the cell which pages to read and which to skip over time. A particular type of chemical modification called acetylation, occurring on DNA bounded proteins (histones), can be promoted or removed by specific proteins. Arabidopsis has at least 18 proteins that remove these chemical modifications and are referred to as histone deacetylases (HDACs). Which are the targets of HDACs, how they coordinate with each other and how they interact with other proteins is still unclear. This study discovered the proteins that interact to one of these chemical modifications that controls the time of flowering.

IBS researchers concentrated on the ninth HDAC, known as HDA9. This protein is known to regulate several biological processes, such as flowering time, seed dormancy and stress responses. The team found that plants lacking this protein bloomed earlier and have enlarged fruits, indicating that the regulation of the stem cells activity was compromised. The same happens when POWERDRESS (PWR) (a protein already studied by the same research team for its regulation of floral stem cells), or both HDA9 and PWR are missing.

The scientists discovered that PWR and HDA9 form a protein complex that removes the chemical modifications from a protein bound to DNA called histone 3. In the same way as removing a bookmark from the "DNA book" indicates that you do not need to read the pages next to the bookmark, removing this chemical modification reduces the production of AGL19, a protein that causes early flowering. In this way, plants maintain normal flowering time.

"PWR, HDA9 and AGL19 regulate flowering time. A plant with reduced PWR and HDA9 has increased AGL19 levels and flowers earlier," explains Kim. "The opposite situation, that is the overexpression of PWR and HDA9, has not been tested yet."

The next challenge for the team is to study other chemical modifications (or "bookmarks") on plants' histones and clarify how these different chemical modifications together regulate flowering.

###

Media Contact

Dahee Carol Kim
[email protected]
@IBS_media

http://www.ibs.re.kr/en/

############

Story Source: Materials provided by Scienmag

Share12Tweet7Share2ShareShareShare1

Related Posts

Kytai Nguyen

Nanomaterials that provide imaging while delivering medication

June 24, 2022
Novel sewage treatment

Novel sewage treatment system removes up to 70% of nitrogen that would otherwise be discarded into nature

June 24, 2022

Microscopy technique enables 3D super-resolution nanometre-scale imaging

June 24, 2022

Flexing the power of a conductive polymer

June 24, 2022
Please login to join discussion

POPULAR NEWS

  • Pacific whiting

    Oregon State University research finds evidence to suggest Pacific whiting skin has anti-aging properties that prevent wrinkles

    36 shares
    Share 14 Tweet 9
  • University of Miami Rosenstiel School selected for National ‘Reefense’ Initiative focusing on Florida and the Caribbean

    35 shares
    Share 14 Tweet 9
  • Dutch researchers teleport quantum information across rudimentary quantum network

    35 shares
    Share 14 Tweet 9
  • Saving the Mekong delta from drowning

    37 shares
    Share 15 Tweet 9

About

We bring you the latest biotechnology news from best research centers and universities around the world. Check our website.

Follow us

Tags

VaccinesVirologyVehiclesViolence/CriminalsUrogenital SystemUrbanizationWeather/StormsZoology/Veterinary ScienceUniversity of WashingtonVaccineVirusWeaponry

Recent Posts

  • Nanomaterials that provide imaging while delivering medication
  • Novel sewage treatment system removes up to 70% of nitrogen that would otherwise be discarded into nature
  • Microscopy technique enables 3D super-resolution nanometre-scale imaging
  • Flexing the power of a conductive polymer
  • Contact Us

© 2019 Bioengineer.org - Biotechnology news by Science Magazine - Scienmag.

No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • National
  • Business
  • Health
  • Lifestyle
  • Science

© 2019 Bioengineer.org - Biotechnology news by Science Magazine - Scienmag.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
Posting....