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Rice: effect of 0·174 mM (5·6 ppm) sulfide on radial oxygen loss (ROL) from fine lateral roots; adventitious root length approx. 90–130 mm; n = 4–6; means±s.e. (A) Using Pt wire cathodes coiled around laterals; circles and triangles for basal laterals (length = approx. 3·6 mm), squares for more apically situated laterals (length = approx. 2 mm). (B) Using cylindrical Pt cathodes around clusters of laterals (length = pprox. 3·6 mm).
