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Elongation of shoots from germinating somatic embryos of embryogenic line 27 under AC and/or radicle cutting treatment in Pinus massoniana. Small letters indicate the differences among AC treatments within the control or radicle cutting treatment (Duncan’s tests, P ≤ 0.05), and capital letters indicate the differences between the control and radicle cutting treatment within the AC treatment (t test, P ≤ 0.05). Bars in the figure mean standard errors (SE), and the same as the following
