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Fig. 9 | Biotechnology for Biofuels

Fig. 9

From: Time-scale dynamics of proteome and transcriptome of the white-rot fungus Phlebia radiata: growth on spruce wood and decay effect on lignocellulose

Fig. 9

Field emission scanning electron microscope images of Norway spruce xylem after 42 days of solid-state growth and decay of spruce sticks by P. radiata. Transverse (a) and longitudinal (b) sections of non-inoculated wood. The arrows indicate 1 intact spruce wood cell secondary wall, 2 middle lamella, 3 bordered pits at the tracheid walls. c Transverse section of spruce xylem after decay by P. radiata demonstrating enlargement of the tracheid lumen volume and apparent thinning of secondary cell wall. The arrows indicate 4 thinned remains of secondary cell wall, 5 enlarged bordered pit. Notice detachment of the tracheids due to erosion of primary cell walls and middle lamellae. d Vertical section of fungal decomposed spruce xylem. Tracheids are flattened and detached due to secondary cell wall thinning and erosion of middle lamellae. e, f Transverse sections of fungal colonization of xylem observed with higher magnification (5000 and 35,000x) demonstrating the hyphae 6, 7 as threads inside the tracheids. Notice glucan deposits (e) and release of tracheid cell wall layers. Scale bars are in (a, b) 50 µm, (e) 10 µm and (f) 1 µm

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