• HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
Tuesday, September 2, 2025
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
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
Reading Time: 3 mins read
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

Share12Tweet8Share2ShareShareShare2

Related Posts

Revolutionizing Fruit Waste: Traditional and AI Solutions

Revolutionizing Fruit Waste: Traditional and AI Solutions

September 2, 2025

Nucleic Acid-Sensing TLRs: Role in Human Diseases

September 2, 2025

Novel WiFi Technology Enables Heart Rate Monitoring Without Wearable Devices

September 2, 2025

How Plants Synchronize Flowering with Light and Temperature Signals

September 2, 2025
Please login to join discussion

POPULAR NEWS

  • Needlestick Injury Rates in Nurses and Students in Pakistan

    160 shares
    Share 64 Tweet 40
  • Breakthrough in Computer Hardware Advances Solves Complex Optimization Challenges

    154 shares
    Share 62 Tweet 39
  • Molecules in Focus: Capturing the Timeless Dance of Particles

    143 shares
    Share 57 Tweet 36
  • New Drug Formulation Transforms Intravenous Treatments into Rapid Injections

    117 shares
    Share 47 Tweet 29

About

BIOENGINEER.ORG

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

Follow us

Recent News

Revolutionizing Fruit Waste: Traditional and AI Solutions

Nucleic Acid-Sensing TLRs: Role in Human Diseases

Novel WiFi Technology Enables Heart Rate Monitoring Without Wearable Devices

  • Contact Us

Bioengineer.org © Copyright 2023 All Rights Reserved.

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

Bioengineer.org © Copyright 2023 All Rights Reserved.