McCully, Margaret E; Canny, Martin; Baker, Adam; Miller, Celia
Background and Aims Since the proposal of the cohesion theory there has been a paradox that the lumenal surface of vessels is rich in hydrophobic lignin, while tension in the rising sap requires adhesion to a hydrophilic surface. This study sought to characterize the strength of that adhesion in maize (Zea mays), the wettability of the vessel surface, and to reconcile this with its histochemical and physical nature. Methods Wettability was assessed by emptying the maize root vessels of sap,...[Show more]
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