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Fructan diversity and polyphyletic origin of fructan biosynthesis in higher plants. An unrooted phylogenetic tree of fructan initiator enzymes (1-SSTs and a pFT) derived from six well-known fructan accumulators (chicory, wheat, ryegrass, onion, Agave, and Pachysandra) is drawn to illustrate the polyphyletic origin of fructan biosynthesis in higher plants.
