Plastid | A cell-body (organellae) in plants other than nucleus, mitochondria and centrosome. Proplastides develop to leukoplasts (or etioplasts in the absence of light) which develop to chloroplasts and/or chromoplasts. All types of plastides can transform into each other. Their shape and function differs. Senescent plastids are called gerontoplasts. They have their own DNA (ctDNA) and ribosomes |