Chromium (VI) Uptake and Tolerance Potential in Cotton Cultivars: Effect on Their Root Physiology, Ultramorphology, and Oxidative Metabolism

Figure 2

Electron micrographs of herbicide resistant transgenic cotton cultivar (J208) ((a) (CK); (b) (100 μM Cr)), insect resistant transgenic cotton cultivar (Z905) ((c) (CK); (d) (100 μM Cr)), and their hybrid line (ZD14) ((e) (CK); (f) (100 μM Cr)) under exceeding levels of Cr. CW = cell wall; Pm = plasma membrane; Mc = mitochondria, N = nucleus; Nu = nucleoli; V = vacuole; ER = endoplasmic reticulum; ICS = intracellular spaces. Double arrows indicate Cr dense granules while single arrow shows rupturing of membranous structures.

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