Navigation Links
Lace plants explain programmed cell death
Date:7/24/2012

Programmed cell death (PCD) is a highly regulated process that occurs in all animals and plants as part of normal development and in response to the environment. New research published in BioMed Central's open access journal BMC Plant Biology is the first to document the physiological events in the lace plant (Aponogeton madagascariensis) which occur via PCD to produce the characteristic holes in its leaves.

The aquatic lace plant, endemic to Madagascar, uses PCD to generate holes in its leaves. Researchers from Dalhousie University, Nova Scotia, used long-term live cell imaging, time-lapse micro-photography and detailed staining to see what actually happens inside individual cells of the lace plant leaves during this process.

PCD always begins in the centre of areoles (areas surrounded by veins) and works its way out, finally stopping four or five cells away from the vein. Within these areoles the stage of PCD can be visually determined by pigmentation. Non-PCD cells contain anthocyanin which is pink. As PCD progresses (early-PCD) the anthocyanin disappears but green chlorophyll remains. By late-PCD, both of these pigments have been lost.

Arunika Gunawardena, who led this research, described what actually happens in more detail, "After the loss of anthocyanin, we saw a reduction in the number and size of chloroplasts concurrent with changes in the actin cytoskeleton, which normally supports the cell from the inside. Actin cables became thicker, but their arrangement became more haphazard (until late-PCD when they began to disappear)."

As PCD progressed chloroplasts and mitochondria (the energy centres of the cell) began to aggregate together and were brought into the acidic vacuole to be degraded - a process that was confirmed using 3D image analysis. Additionally, the researchers found evidence of autophagy (where the cells literally begin to 'eat' themselves from the inside) and discovered organelle-like remnants inside vesicles.

Dr Gunawardena continued, "For each cell we observed, eventually the tonoplast ruptured, and the plasma membrane surrounding the cell collapsed. It only takes 48 hours from the first noticeable loss in chlorophyll until the plasma membrane shrinks, and by 24 hours after this event the cell wall disappears."

This is the first research to use such a variety of visual techniques to look at a process that affects almost every cell type at some stage of an organism's life. These pictures and videos provide a fascinating insight into how the lace plant has high-jacked PCD to produce its quirky, yet beautiful, leaves.


'/>"/>
Contact: Hilary Glover
hilary.glover@biomedcentral.com
44-020-319-22370
BioMed Central
Source:Eurekalert  

Related biology news :

1. Green plants reduce city street pollution up to 8 times more than previously believed
2. New research association started: Magnesium implants shall facilitate bone fracture healing
3. A deeper look into the pathogen responsible for crown gall disease in plants
4. Non-slip tracheal implants
5. Eddies, not sunlight, spur annual bloom of tiny plants in North Atlantic
6. Want bigger plants? Get to the root of the matter
7. Key part of plants rapid response system revealed
8. Evaluation of microscopy techniques may help scientists to better understand ancient plants
9. How plants make cocaine
10. Parasitic plants steal genes from their hosts
11. Its in the genes: Research pinpoints how plants know when to flower
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Lace plants explain programmed cell death
(Date:3/30/2017)... March 30, 2017 The research team of ... three-dimensional (3D) fingerprint identification by adopting ground breaking 3D fingerprint minutiae ... realm of speed and accuracy for use in identification, crime investigation, ... cost. ... A research ...
(Date:3/29/2017)... the health IT company that operates the largest health ... today announced a Series B investment from BlueCross BlueShield ... investment and acquisition accelerates higi,s strategy to create the ... activities through the collection and workflow integration of ambient ... secures data today on behalf of over 36 million ...
(Date:3/27/2017)... , March 27, 2017  Catholic Health ... and Management Systems Society (HIMSS) Analytics for achieving ... Adoption Model sm . In addition, CHS previously ... U.S. hospitals using an electronic medical record (EMR). ... its high level of EMR usage in an ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... , ... Dr. Bob Harman, founder and CEO of VetStem Biopharma, Inc. ... The event entitled “Stem Cells and Their Regenerative Powers,” was held on August ... MPVM was joined by two human doctors: Peter B. Hanson, M.D., Chief of Orthopedic ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... 13 prestigious awards honoring scientists who have made outstanding contributions to ... symposium during Pittcon 2018, the world’s leading conference and exposition for laboratory science, ...
(Date:10/9/2017)... ... October 09, 2017 , ... The Giving Tree ... products targeting the needs of consumers who are incorporating medical marijuana into their ... Phoenix, Arizona. , As operators of two successful Valley dispensaries, The Giving Tree’s ...
(Date:10/7/2017)... , Oct. 6, 2017  The 2017 Nobel ... three scientists, Jacques Dubochet, Joachim Frank ... in cryo-electron microscopy (cryo-EM) have helped ... the structural biology community. The winners worked with ... now routinely produce highly resolved, three-dimensional images of ...
Breaking Biology Technology: