Plastids. Leucoplasts . Leukoplasts . Amyloplast . Chromoplast . Leucoplast . Leukoplast . Plastid . Amyloplasts . Chromoplasts . Self-replicating cytoplasmic organelles of plant and algal cells that contain pigments and may synthesize and accumulate various substances. PLASTID GENOMES are used in phylogenetic studies. . 0.67