Growth of Lasiodiplodia theobromae and its dyeing effect on the surface properties of rubber wood

ObjectiveLasiodiplodia theobromae is one of the main fungi causing the blue stain of rubber wood, and most researches focused on prevention of blue stain. This paper uses the diversity of blue stain from prevention to induction, to improve the utilization value of blue phenomenon.

MethodBy analyzing the effects of different proportions of czapek-dox medium on the growth rate of Lasiodiplodia theobromae on the culture medium and the surface of rubber wood, the optimum environment was optimized, and we investigated the dyeing effects of Lasiodiplodia theobromae on the surface properties of rubber wood.

ResultThe results showed that optimum environment was yeast extract 9 g/L, glucose 20 g/L, pH weak acidity, MgSO₄ 1.0 g/L, FeSO₄ 0.03 g/L, KCl 0.2 g/L. With the increase of time, the dyeing area of surface color gradually increased, and the color changed from red and yellow to blue and green, and the light fastness gradually increased, and static state contact angle was improved by 13.04%, and the dynamic state contact angle inproved prominently, and surface roughness and wear resistance gradually decreased.

ConclusionIn this study, Lasiodiplodia theobromae dyed rubber wood was prepared, and the surface texture and color of rubber wood were controlled by different time gradients, which verified the feasibility of biological wood processing and expanded the utilization value of microorganisms in wood processing.