Translocation shoot section

Du Buy HG, Olson RA (1940) The relation between respiration, protoplasmic streaming, and auxin transport in the Avena coleoptile. Am J Bot 27 401-414 Edwards KL, Goldsmith MHM (1980) pH-dependent accumulation of indoleacetic acid by corn coleoptile sections. Planta 147 457-466 Eliasson L (1972) Translocation of shoot-applied indolylacetic acid into the roots of Populus tremula. Physiol Plant 27 412-416... 

Applied as pre- or postemergence compounds, triazines and triazinones inhibit photosynthesis, and many of the criteria for activity are the same as for the ureas (Section 9.4.1.9). All compounds are well taken up by roots and translocated to shoots via the xylem. 

An enhanced uptake of metals into the root symplasm was found in T. caerulescens compared to the related non-accumulator, T. arvense [68,69], and a reduced sequestration into the root vacuoles was associated with the higher root to shoot translocation efficiency of T. caerulescens [49,69,70]. Xylem loading and xylem transport are key steps in Cd hyperaccumulation, as it will be discussed in detail in the section about transport proteins below, and as it was commented by White et al. already 10 years ago [71]. Also in non-hyperaccumulators, the degree of Cd accumulation in above-ground tissues mainly depends on xylem transport [72]. 

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