Fig. 5From: Graphene oxide and indole-3-acetic acid cotreatment regulates the root growth of Brassica napus L. via multiple phytohormone pathwaysRelative transcript levels of key genes involved in the ABA (a), CTK (b) and GA (c) and IAA (d) pathways in B. napus treated with 25 mg/L GO and 10 mg/L IAA on the 10th day after treatment. Values with different letters are significantly different (Student’s t-test, P < 0.01)Back to article page