Optional use of CAM photosynthesis in two C4 species, Portulaca cyclophylla and Portulaca digyna

Journal of Plant Physiology
Joseph A M HoltumKlaus Winter

Abstract

Low levels of crassulacean acid metabolism (CAM) are demonstrated in two species with C4 photosynthesis, Portulaca cyclophylla and P. digyna. The expression of CAM in P. cyclophylla and P. digyna is facultative, i.e. optional. Well-watered plants did not accumulate acid at night and exhibited gas-exchange patterns consistent with C4 photosynthesis. CAM-type nocturnal acidification was reversible in that it was induced following drought and lost when droughted plants were rewatered. In P. cyclophylla, droughting was accompanied by a small but discernible net uptake of CO2 during the dark, whereas in P. digyna, net CO2 exchange at night approached the CO2 compensation point but did not transition beyond it. This report brings the number of known C4 species with a capacity for expressing CAM to six. All are species of Portulaca. The observation of CAM in P. cyclophylla and P. digyna is the first for species in the opposite-leaved (OL) Portulacelloid-anatomy lineage of Portulaca and for the Australian clade therein. The other four species are within the alternate-leaved (AL) lineage, in the Atriploid-anatomy Oleracea and the Pilosoid-anatomy Pilosa clades. Studies of the evolutionary origins of C4 and CAM in Portulaca will benefit ...Continue Reading

References

Nov 22, 2013·American Journal of Botany·Gilberto OcampoJ Travis Columbus
Mar 19, 2014·Journal of Experimental Botany·Pascal-Antoine ChristinErika J Edwards
Apr 24, 2014·Journal of Experimental Botany·Lillian Hancock, Erika J Edwards
May 16, 2015·The New Phytologist·Klaus WinterJ Andrew C Smith
Apr 19, 2016·Current Opinion in Plant Biology·Joseph Am HoltumKlaus Winter
Aug 3, 2016·Journal of Plant Physiology·Rowan F Sage, Stefanie Sultmanis
Jul 1, 2015·Functional Plant Biology : FPB·Klaus Winter, Joseph A M Holtum
Jun 1, 2002·Functional Plant Biology : FPB·Rowan F Sage

❮ Previous
Next ❯

Citations

Jan 26, 2018·Plant Biology·J A M HoltumK Winter
Apr 17, 2018·American Journal of Botany·Eric W GoolsbyErika J Edwards
Aug 6, 2018·Photosynthesis Research·Wen Min HuangStephen C Maberly
Dec 12, 2018·Journal of Experimental Botany·Klaus WinterJoseph A M Holtum
Jan 29, 2019·Journal of Experimental Botany·Katharina BohleyGudrun Kadereit
Feb 28, 2019·Journal of Experimental Botany·Klaus Winter
Mar 2, 2019·Journal of Experimental Botany·Klaus WinterJoseph A M Holtum
May 16, 2019·Journal of Experimental Botany·Sarah C DavisAlberto Búrquez
Aug 30, 2020·Scientific Reports·Renata Callegari FerrariLuciano Freschi
Feb 4, 2021·The New Phytologist·Andreas H SchweigerSteven I Higgins
Jul 10, 2019·Current Opinion in Plant Biology·Nicholas A NiechayevJohn C Cushman
Sep 14, 2020·Functional Plant Biology : FPB·Klaus WinterJoseph A M Holtum
Dec 2, 2020·Functional Plant Biology : FPB·Renata Callegari FerrariLuciano Freschi

❮ Previous
Next ❯

Related Concepts

Related Feeds

Adhesion Molecules in Health and Disease

Cell adhesion molecules are a subset of cell adhesion proteins located on the cell surface involved in binding with other cells or with the extracellular matrix in the process called cell adhesion. In essence, cell adhesion molecules help cells stick to each other and to their surroundings. Cell adhesion is a crucial component in maintaining tissue structure and function. Discover the latest research on adhesion molecule and their role in health and disease here.