Characterization of the decline and recovery of heat-treated Scenedesmus vacuolatus

Botanical Studies
Tzan-Chain Lee, Ban-Dar Hsu

Abstract

To find out how algal cells cope with and recover from heat stress, the small vegetative cells of the synchronous Scenedesmus vacuolatus culture were subjected to a heat pretreatment (46.5°C for 1 h) followed by dark recultivation. The changes in physiological activities and morphology of Scenedesmus cells were continuously monitored throughout the course of decline and recovery. It was found that the heat treatment, though completely inhibited photosynthesis, did not kill Scenedesmus cells. These cells, during dark recultivation, could make a fast repair and regained the ability of proliferation. We suggest that they entered a 'stand-by' state, which was characterized by condensed chromatin, partially functional but morphologically altered chloroplasts, disappeared vacuoles, slightly shrunk protoplast and intact plasma membranes. These stressed cells, on the surface, seemingly were undergoing some kind of disintegration, could readily and quickly return to normal cells upon illumination. Cell death occurred only after a long period of darkness (>48 h). Our results suggest that the recovery of algal cells from stress damage may actually proceed in two steps. The middle "stand-by' stage normally is gone through too rapidly to be...Continue Reading

References

Sep 25, 2003·Annual Review of Plant Biology·Gunnar Oquist, Norman P A Huner
Mar 8, 2005·Trends in Plant Science·Wouter G van Doorn, Ernst J Woltering
Jun 15, 2005·Trends in Cell Biology·Mark D TempleIan W Dawes
Sep 7, 2005·Photosynthesis Research·Jun Minagawa, Yuichiro Takahashi
Dec 13, 2005·Systematic Biology·Louise A Lewis, Paul O Lewis
Jul 11, 2006·Folia Microbiologica·S Gupta, S C Agrawal
Jun 15, 2007·Plant & Cell Physiology·Anna ZuppiniBarbara Baldan
Jul 24, 2008·Photosynthesis Research·Suleyman I AllakhverdievPrasanna Mohanty
Aug 15, 2009·Aquatic Toxicology·Carmen RiobooAngeles Cid
Jul 8, 2010·Trends in Plant Science·Ian M Møller, Lee J Sweetlove
Apr 16, 2011·Cell Death and Differentiation·W G van DoornP V Bozhkov

❮ Previous
Next ❯

Citations

Jun 27, 2019·International Journal of Molecular Sciences·Tzu-Hsing KoTzan-Chain Lee

❮ Previous
Next ❯

Methods Mentioned

BETA
flow cytometry
environmental stress

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.