3、The hairy roots transformed by ATCC15834 grew rapidly on MS medium without any phytohormones, and were characterized by strongly branching, clustering and non-geotropism, etc.
1、The main stems of a plant show negative geotropism as they grow upwards.
2、An auxin increases the growth in length of a plant cell, thus causing the curving of a stem, or roof, in phototropism and geotropism.
