Abstract
Starch can accumulate in both actively growing vegetative fronds and over-wintering propagules, or turions of duckweeds, small floating aquatic plants belonging to the family of the Lemnaceae. The starch synthesizing potential of 36 duckweed species varies enormously, and the starch contents actually occurring in the duckweed tissues are determined by growth conditions, various types of stress and the action of growth regulators. The present review examines the effects of phytohormones and growth retardants, heavy metals, nutrient deficiency and salinity on the accumulation of starch in duckweeds with a view to obtaining high yields of starch as a feedstock for biofuel production. Biotechnological approaches to degrading duckweed starch to its component sugars and the fermentation of these sugars to bio-alcohols are also discussed.
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Appenroth, KJ., Ziegler, P. & Sree, K.S. Accumulation of starch in duckweeds (Lemnaceae), potential energy plants. Physiol Mol Biol Plants 27, 2621–2633 (2021). https://doi.org/10.1007/s12298-021-01100-4
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DOI: https://doi.org/10.1007/s12298-021-01100-4