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Extra info for Retention, Uptake, and Translocation of Agrochemicals in Plants

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Analysis of the Basic Processes Involved in the Deposition, Degradation, Persistence, and Effectiveness of Pesticides. Res. Rev. 1963, 3, 35–163. Falk, R. H. Influence of Formulation and Adjuvants on the Foliar Location and Physical Form of the Active Ingredient. In Interactions between Adjuvants, Agrochemicals and Target Organisms; Holloway, P. , Rees, R. ; Ernst Schering Research Foundation; Springer: Berlin, 1994; pp 53−82. Hislop, E. C. Can We Define and Achieve Optimum Pesticide Deposits? Aspects Applied Biol.

Long-Distance Transport in the Phloem Long-distance transport in the phloem occurs in the sieve tubes. It is generally accepted that the pressure flow hypothesis proposed by Münch (83) is the principle of the transport mechanism in the phloem. According to this hypothesis, the mass flow in the phloem is osmotically driven by a differential pressure gradient generated by accumulation of sugars and other solutes at the sources (loading) and their release (unloading) at the sinks. The sources are mainly leaves and the sinks are energy-demanding or storage tissues such as roots, fruits and meristematic tissues (84).

Moreover, the interaction of environmental factors such as relative humidity and temperature on cuticle penetration (13), phloem translocation (13), and xenobiotic metabolism (14) has not been considered in earlier models. g. xylem/phloem connections, cuticle thickness, membrane permeability, apoplast, symplast and vascular sap pH), and relevant soil and environmental parameters (relative humidity, temperature and soil water potential). ; ERMESSE model more accurately predicts xenobiotic uptake and translocation (16, 17).

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