Fig. 4From: Graphene oxide and indole-3-acetic acid cotreatment regulates the root growth of Brassica napus L. via multiple phytohormone pathwaysContents of ABA(a), IAA(b), CTK(c) and GA (d) in B.napus seedlings on the 10th day after GO and IAA treatment. Values with different letters are significantly different (Student’s t-test, P < 0.01)Back to article page