Abstract
Underground bulbous plants or geophytes are plants that develop underground storage organs containing perennating buds, which are means of propagation. Geophytes act as storage organs, which help them to survive extreme environments, used as energy resources for plants and for vegetative propagation. The metabolic status of geophytes determines its developmental phase. Sugars are the main components of underground geophytes, and their dynamics are crucial in regulating the dormancy-active metabolic phase transition. Dormant buds require carbon sources to promote growth, and the plant adjusts sugar metabolism between storage and soluble sugars to provide the required carbon source thereby maintaining the dormancy-active metabolic phase transition. Underground bulbous plants modulate their sugar metabolism between soluble and storage sugars. In recent years, sugars such as sucrose, glucose, fructose, and trehalose have been considered as important signaling molecules involved in several plant developmental processes, including flowering. The current chapter summarizes the role of different sugars in regulating flowering in geophytes.
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