Exogenously applied -ABA

Fig. 7.2 A-E. Interactions of lAA with ABA, GA, TIBA, and zeatin (ZEA), alone or in combination, as evidenced by effects upon the wavelike pattern of auxin efflux from the basal ends of successive 6-mm-long pine stem sections. Protocol as in Fig. 7.1. Test substances were applied for 100 min prior to sectioning and positioning for 10-min auxin basal efflux period. Test substances were applied apically only in A, C, D, and E, but both apically (a) and basally (b) in B. Controls had no exposure to exogenous substances. (A, B, C, and D adapted from Wod-ziCKi and Wodzicki 1981 E from WoDZiCKi et al. 1979)...

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