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:1/6/2017)... NEWARK, Calif. , Jan. 5, 2017  Delta ... introduced its iris scanning technology for automotive at CES® ... GNTX ) to demonstrate the use of ... to identify and authenticate the driver in a car, ... automobiles during the driving experience. Delta ID ...
(Date:12/22/2016)... 2016 SuperCom (NASDAQ:   ... the e-Government, Public Safety, HealthCare, and Finance sectors announced today that ... selected to implement and deploy a community-based supportive services program to ... , further expanding its presence in the state. ... This new program, which is ...
(Date:12/16/2016)... -- Research and Markets has announced the addition of ... 2021" report to their offering. ... The biometric vehicle access system market, in ... 14.06% from 2016 to 2021. The market is estimated to be ... Million by 2021. The growth of the biometric vehicle access system ...
Breaking Biology News(10 mins):
(Date:1/18/2017)... TORONTO , Jan. 18, 2017 /PRNewswire/ - ... life sciences and diagnostics company that develops and ... diagnostics ("SQI" or the "Company"), today announced that ... Markets Inc. ("Kingsdale"), has resigned from its Board ... recent changes to securities regulations that have limited ...
(Date:1/17/2017)...  An international team of researchers from UC ... Hospital Albrechtsen Research Centre/University of Manitoba have identified ... need affecting nearly one in 15 Americans. Published ... results identify small molecule drugs with neuroprotective and ... in animal models of metabolic, chemical and infection ...
(Date:1/17/2017)... , Jan. 17, 2017 Research and ... "Molecular Diagnostics - Technologies, Markets and Companies" to ... ... has increased remarkably during the past few years. More than ... molecular diagnostics and 342 of these are profiled in the ...
(Date:1/17/2017)... , ... January 17, 2017 , ... ... re-engineered Drug Safety Technology Consortium™ (SafeTEC™), $3 million in investment towards 15+ TEC ... new tools and assays, and their applicability in drug safety assessment, for the ...
Breaking Biology Technology: