Si | Silicon

The addition of Silicon to the tissue culture medium improves several aspects like

• organogenesis
• embryogenesis
• growth traits
• morphological, anatomical, and physiological characteristics of leaves
• tolerance to low temperature and salinity
• cell protection against metal toxicity
• oxidative phenolic browning reduction of hyperhydricity in various plants

according to the results of a review by Sivanesan and Park (2014).

References
Sivanesan, Iyyakkannu, and Se Won Park. "The role of silicon in plant tissue culture." Frontiers in plant science 5 (2014).