Unique photosynthetic phenotypes in Portulaca (Portulacaceae): C3-C4 intermediates and NAD-ME C4 species with Pilosoid-type Kranz anatomy.

ABSTRACT: Portulacaceae is a family that has considerable diversity in photosynthetic phenotypes. It is one of 19 families of terrestrial plants where species having C₄ photosynthesis have been found. Most species in Portulaca are in the alternate-leaved (AL) lineage, which includes one clade (Cryptopetala) with taxa lacking C₄ photosynthesis and three clades having C₄ species (Oleracea, Umbraticola and Pilosa). All three species in the Cryptopetala clade lack Kranz anatomy, the leaves have C₃-like carbon isotope composition and they have low levels of C₄ cycle enzymes. Anatomical, biochemical and physiological analyses show they are all C₃-C₄ intermediates. They have intermediate CO₂ compensation points, enrichm

SUBMITTER: Voznesenskaya EV 

PROVIDER: S-EPMC5853368 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature