Full-length transcriptome analysis revealed that 2,4-dichlorophenoxyacetic acid promoted <i>in vitro</i> bulblet initiation in lily by affecting carbohydrate metabolism and auxin signaling.

At the bulblet appearance and enlargement stage, the enzymes involved in the starch synthetic direction, such as ADP-glucose Pyrophosphorylase (AGPase, EC 2.7.7.27), Starch Synthase (SS, EC 2.4.1.21), Starch Branching Enzyme (SBE, EC 2.4.1.18) and Granule-bound Starch Synthase (GBSS, EC 2.4.1.242), showed a decreasing trend in mother scales but higher gene expression levels in newly formed bulblets, while the enzyme in the starch cleavage direction, Starch Debranching Enzyme (DBE, EC 3.2.1.10), showed higher expression levels in scales than in bulblets in lily ( Li et al., 2014 ).

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In Lilium , the enzymes involved in starch synthetic direction, such as AGPase, GBSS, SS, and SBE, showed a decreasing trend in mother scales but an increasing trend in bulblets during bulblet formation ( Li et al., 2014 ; Wu et al., 2021 ).

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