The sensitivity of photosynthesis to phosphorus deficiency differs between C3 and C4 tropical grasses

Functional Plant Biology : FPB
Oula GhannoumJann P Conroy

Abstract

Phosphorus (P) is an important determinant of plant productivity, particularly in the tropical grasslands of Australia, which contain both C3 and C4 species. Few studies have compared the responses of such species to P deficiency. Previous work led us to hypothesise that C3 photosynthesis and the three subtypes of C4 photosynthesis have different sensitivities to P deficiency. To examine their dynamic response to P deficiency in more detail, four taxonomically related tropical grasses (Panicum laxum (C3) and Panicum coloratum, Cenchrus ciliaris and Panicum maximum belonging to the C4 subtypes NAD-ME, NADP-ME and PCK, respectively) were grown under contrasting P supplies, including P withdrawal from the growing medium. Changes in photosynthesis and growth were compared with leaf carbohydrate contents and metabolic fingerprints obtained using high-resolution proton nuclear magnetic resonance (1H-NMR). The response of CO2 assimilation rates to leaf contents of inorganic phosphate ([Pi]) was linear in the C3 grass, but asymptotic for the three C4 grasses. Relative growth rate was affected most by low P in the C3 species and was correlated with the leaf content of glucose 6-phosphate more than with carbohydrates. Principal component...Continue Reading

References

Mar 10, 1998·Plant Physiology·D P SchachtmanS M Ayling
Jul 4, 2001·Journal of Experimental Botany·A J PietersD W Lawlor
Jan 1, 2003·Journal of Experimental Botany·Matthew J Paul, Till K Pellny
Jun 1, 1996·Annual Review of Plant Physiology and Plant Molecular Biology·Raymond CholletMarion H. O'Leary
Nov 3, 2004·Journal of Experimental Botany·P KrishnanR G Ratcliffe
Dec 21, 2005·Journal of Experimental Botany·Rowan F Sage, Athena D McKown
Mar 16, 2007·Proceedings of the National Academy of Sciences of the United States of America·Rhonda C MeyerThomas Altmann
Mar 1, 1993·Photosynthesis Research·A A IglesiasF E Podestá

❮ Previous
Next ❯

Citations

Mar 6, 2015·Journal of Experimental Botany·Iker Hernández, Sergi Munné-Bosch
Oct 15, 2013·Journal of Experimental Botany·John A Raven
Feb 18, 2011·Photosynthesis Research·John A RavenStephen C Maberly
Mar 9, 2011·Physiologia Plantarum·John A Raven
Oct 6, 2020·Frontiers in Plant Science·Timothy O JobeStanislav Kopriva
Mar 15, 2011·Progress in Nuclear Magnetic Resonance Spectroscopy·André J SimpsonMyrna J Simpson
May 21, 2014·Environmental Science & Technology·Paul J A WithersPeter J Talboys

❮ Previous
Next ❯

Methods Mentioned

BETA
nuclear magnetic resonance
PCA
transgenics

Software Mentioned

SIMCA

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.