Fig. 1From: Xylem structure and hydraulic characteristics of deep roots, shallow roots and branches of walnut under seasonal droughtXylem cross sections of branches, shallow roots, and deep roots under optical microscope (upper row), and vessel wall micrographs of branches, shallow roots, and deep roots with SEM (lower row). Three biological replicates for each plant organ were sectioned, and two visual fields of each replicate were chosen to be photographed for analysisBack to article page