Evolution of plant sucrose uptake transporter

Anke Reinders, Alicia B. Sivitz, John M. Ward

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

In angiosperms, sucrose uptake transporters (SUTs have important functions especially in vascular tissue. Here we explore the evolutionary origins of SUTs by analysis of angiosperm SUTs and homologous transporters in a vascular early land plant, Selaginella moellendorffii, and a non-vascular plant, the bryophyte Physcomitrella patens, the charophyte algae Chlorokybus atmosphyticus, several red algae and fission yeast, Schizosaccharomyces pombe. Plant SUTs cluster into three types by phylogenetic analysis. Previous studies using angiosperms had shown that types I and II are localized to the plasma membrane while type III SUTs are associated with vacuolar membrane. SUT homologs were not found in the chlorophyte algae Chlamydomonas reinhardtii and Volvox carterii. However, the characean algae Chlorokybus atmosphyticus contains a SUT homolog (CaSUT1 and phylogenetic analysis indicated that it is basal to all other streptophyte SUTs analyzed. SUTs are present in both red algae and S. pombe but they are less related to plant SUTs than CaSUT1. Both Selaginella and Physcomitrella encode type II and III SUTs suggesting that both plasma membrane and vacuolar sucrose transporter activities were present in early land plants. It is likely that SUT transporters are important for scavenging sucrose from the environment and intracellular compartments in charophyte and non-vascular plants. Type I SUTs were only found in eudicots and we conclude that they evolved from type III SUTs, possibly through loss of a vacuolar targeting sequence. Eudicots utilize type I SUTs for phloem (vascular tissue loading while monocots use type II SUTs for phloem loading. We show that HvSUT1 from barley, a type II SUT, reverted the growth defect of the Arabidopsis atsuc2 (type I mutant. This indicates that type I and II SUTs evolved similar (and interchangeable phloem loading transporter capabilities independently.

Original languageEnglish (US)
Article number22
JournalFrontiers in Plant Science
Volume3
Issue numberFEB
DOIs
StatePublished - Feb 15 2012

Fingerprint

algae
transporters
sucrose
Schizosaccharomyces pombe
non-vascular plants
phloem loading
Selaginella
Angiospermae
embryophytes
vascular tissues
Rhodophyta
plasma membrane
Physcomitrella
Volvox
Physcomitrella patens
phylogeny
Chlamydomonas reinhardtii
Liliopsida
blood vessels
phloem

Keywords

  • Evolution
  • Phylogeny
  • SUT
  • Sucrose transporter

Cite this

Evolution of plant sucrose uptake transporter. / Reinders, Anke; Sivitz, Alicia B.; Ward, John M.

In: Frontiers in Plant Science, Vol. 3, No. FEB, 22, 15.02.2012.

Research output: Contribution to journalArticle

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