Photosynthetic features of non-Kranz type C4 versus Kranz type C4 and C3 species in subfamily Suaedoideae (Chenopodiaceae)

Functional Plant Biology : FPB
Monica E SmithGerald E Edwards

Abstract

The objective of this study was to characterise photosynthesis in terrestrial non-Kranz (NK) C4 species, Bienertia sinuspersici Akhani and Suaeda aralocaspica (Bunge) Freitag & Schütze (formerly Borszczowia aralocaspica), compared with closely related Kranz type C4 Suaeda eltonica Iljin and Suaeda taxifolia Standley, and C3 species Suaeda heterophylla Bunge and Suaeda maritima Dumort in subfamily Suaedoideae (Chenopodiaceae). Traditional Kranz type C4 photosynthesis has several advantages over C3 photosynthesis under certain environmental conditions by suppressing photorespiration. The different photosynthetic types were evaluated under varying levels of CO2 and light at 25°C. Both NK and Kranz type species had C4 type CO2 compensation points (corrected for dark-type respiration) and half maximum saturation of photosynthesis at similar levels of atmospheric CO2 (average of 145 µbar for the C4 species v. 330 µbar CO2 for C3 species) characteristic of C4 photosynthesis. CO2 saturated rates of photosynthesis per unit chlorophyll was higher in the C3 (at ~2.5 current ambient CO2 levels) than the C4 species, which is likely related to their higher Rubisco content. The amount of Rubisco as a percentage of total protein was similar in...Continue Reading

References

Dec 6, 2001·Nature·E V VoznesenskayaG E Edwards
Jul 18, 2002·Trends in Plant Science·Rowan F Sage
Sep 5, 2002·The Plant Journal : for Cell and Molecular Biology·Elena V VoznesenskayaGerald E Edwards
Sep 21, 2004·Annual Review of Plant Biology·Gerald E EdwardsElena V Voznesenskaya
Oct 18, 2005·Photosynthesis Research·Susanne von Caemmerer, Robert T Furbank
Aug 1, 1975·Plant Physiology·E G KrenzerR K Crookston
Nov 1, 1983·Plant Physiology·J Ehleringer, R W Pearcy
Jul 1, 2002·Oecologia·Michael S PeekIrwin N Forseth

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Citations

Apr 20, 2011·Plant Signaling & Behavior·Sascha OffermannGerald E Edwards
Sep 29, 2011·Plant, Cell & Environment·Jenny L KingAsaph B Cousins
Jan 4, 2013·PloS One·Maxim V KapralovDmitry A Filatov
Oct 6, 2010·Plant Physiology·Susanne von Caemmerer, John R Evans

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