The ultrastructure, control, and function of plasmodesmata in the transport of assimilates across plant cells

Abstract

Direct symplastic transport of chemicals, including photoassimilates, is made possible by tiny channels called

plasmodesmata, which link neighboring plant cells. Their function in regulating the transfer of assimilates from

source tissues to sink tissues and in intercellular communication is critical. The efficiency of sucrose and other

carbohydrate transport is affected by the form, frequency, and permeability of plasmodesmata, which in turn

affects plant growth and production. Under both normal and stress settings, plasmodesmata play an important

role in nutrient partitioning, and this review delves into their ultrastructure and the molecular processes that

control their regulation. Recent developments in imaging methods, molecular gating, and strategies for loading

and unloading phloem with plasmodesmal function are highlighted. By delving into these channels, we may get

valuable insights into how to enhance crop production by precisely manipulating assimilate transport processes.