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:2/10/2016)... February 10, 2016 ... to 2016 iris recognition market report, combined ... is more widely accepted for border control. ... fingerprint and iris recognition technology in a ... avoid purchasing two individual biometrics devices. ...
(Date:2/9/2016)... Aware, Inc. (NASDAQ: AWRE ), a leading supplier of biometrics ... and year ended December 31, 2015.  --> ... was $6.9 million, an increase of 61% compared to $4.3 million ... quarter of 2015 was $2.6 million compared to $0.2 million in ... --> Higher revenue and operating income in the fourth ...
(Date:2/9/2016)... Vigilant Solutions announces today that an agency used ... a lead in a difficult homicide case. The agency then ... the suspect vehicle. Due to the ongoing investigation, the agency ... at the agency,s request. --> ... was found deceased at an intersection here in the City. ...
Breaking Biology News(10 mins):
(Date:2/10/2016)... , Feb. 10, 2016  Allergan plc (NYSE: ... announced that Brent Saunders , Allergan,s CEO and ... a fireside chat session at the RBC Capital Markets ... p.m. ET at The New York Palace Hotel in ... will be webcast live and can be accessed on ...
(Date:2/10/2016)... (PRWEB) , ... February 10, 2016 , ... ... attend the International Society of Pharmaceutical Engineering (ISPE) Rocky Mountain Chapter 21st Annual ... is expecting to fill more than 100 tables for its annual event, which ...
(Date:2/10/2016)... Mateo, CA (PRWEB) , ... February 10, 2016 ... ... of Multiplex Testing (PROMPT), a research registry built on the secure online PatientCrossroads ... September 2014. More than 1,600 participants have joined the PROMPT study, which seeks ...
(Date:2/10/2016)... La Jolla CA (PRWEB) , ... February 10, 2016 , ... ... of new agents for the treatment of Alzheimer’s disease, announced today it has been ... to February 18th at the Breakers in Palm Beach, Florida. The purpose of ...
Breaking Biology Technology: