Plants have developed a remarkable ability not only to
perceive changes in their environment, but also to adapt quickly to them. This
modification is dependent on factors such as growth, development, and
metabolism, as well as the progression of various mechanisms for the regulation
of cellular homeostasis. Progressive evidence indicates that glycosylation is
one of these mechanisms, because these large families of glycosyltransferases
(GTs) are able to recognize, among other things, hormones, secondary
metabolites, and toxins in the environment (Bowles, Lim et al. 2006). Glycosylation of lipophilic acceptors
with small molecular weight appears to be a crucial mechanism for the metabolic
homeostasis of plant cells (Bowles, Isayenkova et al. 2005). It is known that plants produce
a variety of natural products through secondary metabolism. For example, the
diversity of flavonoids, of which more than 4000 are known, derived from combinatorial
modifications of their aromatic structure, commonly catalyzed by GTs. (Gachon, Langlois-Meurinne et al.
2005). Plant secondary metabolites
are applied in various areas, e.g. food or medicine, and represent one of the
major group of metabolites (Tiwari, Sangwan et al. 2016). To modify
their properties such as volatility, toxicity, and mobility, various terminal
transformations have to be performed using specific enzymes such as GTs (Sharma, Rawat et al. 2014, Tiwari, Mishra et al. 2014, Tiwari, Sangwan et
al. 2016). By adding
a carbohydrate residue to secondary metabolites, such as flavonoids and phenolics,
a positive impact results on their properties and therefore influences their
bioactivities (Tiwari, Sangwan et al. 2016). Due to
their biological, pharmacological and agronomic relevance, GTs have aroused
significant interest for many years, but so far only a small proportion of them
has been characterized (Gachon, Langlois-Meurinne et al.


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