In 1967 he discovered satellite DNA in plants. Through his research from 1972 to 1975, it was found that closely related species of one genus differ in satellite DNA content. In 1986 he published the monograph Satellite DNA in Springer Edition. In 2013 this monograph was edited as an eBOOK.
In 2011-17 he established a complete nucleotide sequence of four Georgian grape varieties, nuclear, chloroplast and mitochondria.
In 2015-21 he established a complete chloroplast DNA sequence of Georgian wheat species
In 1967, he defended his Candidate's Dissertation. In 1980, he defended his doctoral dissertation in the Bakh Institute of Biochemistry, Moscow. He is elected a corresponding member of the Academy of Sciences of Georgia in 1987 and a full member in 1993.
Beridze held various positions in Soviet and Georgian institutions since 1960s.