AI Article Synopsis
- - GIGANTEA (GI) is a versatile plant protein derived from a common ancestor, playing essential roles in regulating various biological functions such as circadian rhythms, light responses, and stress management.
- - Despite being discovered over sixty years ago, the specific functional domains and mechanisms of action for GI remain largely undefined, prompting ongoing research into its evolutionary adaptation and integration into existing signaling pathways.
- - This review summarizes the known functions of GI while also exploring its evolutionary development within plant lineages, highlighting its emerging roles in chloroplast accumulation and anthocyanin production.
Article Abstract
GIGANTEA is a multifaceted plant-specific protein that originated in a streptophyte ancestor. The current known functions of GI include circadian clock control, light signalling, flowering time regulation, stomata response, chloroplast biogenesis, accumulation of anthocyanin, chlorophyll, and starch, phytohormone signalling, senescence and response to drought, salt, and oxidative stress. Six decades since its discovery, no functional domains have been defined, and its mechanism of action is still not well-characterised. In this review, we explore the functional evolution of GI to distinguish between ancestral and more recently acquired roles. GI integrated itself into various existing signalling pathways of the circadian clock, blue light, photoperiod, and osmotic and oxidative stress response. It also evolved parallelly to acquire new functions for chloroplast accumulation, red light signalling and anthocyanin production. In this review, we have encapsulated the known mechanisms of various biological functions of GI. Additionally, this manuscript will throw light on the evolution of GI in plant lineage.
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| http://dx.doi.org/10.1093/jxb/erae441 | DOI Listing |
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