Changes in photosynthetic pigment composition and absorbed energy allocation during salt stress and CAM induction in Mesembryanthemum crystallinum

Functional Plant Biology : FPB
David H BarkerW. W. Adams III

Abstract

Mesembryanthemum crystallinum L. undergoes a transition from the C3 photosynthetic pathway to crassulacean acid metabolism (CAM) in response to increasing salinity. As a consequence, growth is greatly reduced and less light energy is utilised in carbon fixation, leading to an increase in dissipation of thermal energy to remove potentially dangerous excess excitation energy. The pigment composition of plants grown for 4 weeks at 20 mm (low) and 400 mm (high) NaCl was sampled, and photochemical performance, tissue acidity and growth were sampled at 2 and 4 weeks. High-salt-grown plants, which switched to CAM, accumulated only 25% of the fresh weight of low-salt-grown plants, which maintained C3 photosynthesis. Predawn Fv / Fm and de-epoxidation of violaxanthin [(A + Z) / (V + A + Z)] was similar between plants after 2 and 4 weeks, revealing no sustained depression in PSII efficiency under the high-salt treatment. However, at midday under high photosynthetic photon flux densities (PPFD) high-salt plants displayed lower PSII efficiency, higher (A + Z) / (V + A + Z) and greater allocation of energy to thermal dissipation over photochemistry than low-salt plants. Pigment contents were similar between treatments for the first 3 weeks,...Continue Reading

References

Oct 28, 1998·Proceedings of the National Academy of Sciences of the United States of America·B J PogsonD DellaPenna
Jul 21, 1999·Proceedings of the National Academy of Sciences of the United States of America·M Havaux, K K Niyogi
Feb 10, 2000·Nature·B Demmig-Adams, W W Adams
Apr 12, 2001·Plant Physiology·P MüllerK K Niyogi
Feb 14, 2002·Plant, Cell & Environment·R. Munns
Mar 12, 2004·Annual Review of Plant Physiology and Plant Molecular Biology·Krishna K. Niyogi
Jun 1, 1996·Annual Review of Plant Physiology and Plant Molecular Biology·K. E. Koch
Jun 1, 2002·Functional Plant Biology : FPB·Anne M Borland, Antony N Dodd
Feb 1, 1998·The New Phytologist·Patricia AdamsHoward Griffiths

❮ Previous
Next ❯

Citations

Jul 1, 2005·Functional Plant Biology : FPB·John C Cushman
Mar 21, 2021·Ecotoxicology·Elsayed MohamedShashi Bhushan Agrawal

❮ Previous
Next ❯

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.