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玉蜀黍色二孢和大孢色二孢侵染造成的玉米干腐病每年使美国玉米带产量减少10~9蒲式耳。配制上述种属产孢量大而又孢子形态、生理和菌龄一致的标准培养基,是有关研究工作的需要。将该色二孢属种在用蔗糖和维生素H改良的基础无机盐培养基培养表明:在每升培养基上加5g或10g蔗糖、6mg或8mg维生素H时,两种病菌均可产生最大量的器孢子。超过上限的蔗糖浓度与产孢量负相关(r=-0.50,r=-0.98),而与营养体生长成正相关(r=0.65,r=0.98)。维生素H浓度过高或过低时,色二孢产孢量都下降。在加入维生素H后,大孢色二孢的产孢量和两种病菌的菌丝体的生长量,均能增大。
Corn dry rot caused by both maize dycosides and Dictyostelium disintegroses reduces the yield of U.S. maize strips by 10-9 bushels per year. The preparation of the above species sporulation volume and spore morphology, physiological and bacterial age consistent standard medium is the need for research work. Cultivation of this strain of Aspergillus sp. On the basal mineral medium modified with sucrose and vitamin H showed that the maximum amount of both bacteria could be produced when 5 g or 10 g of sucrose, 6 mg or 8 mg of vitamin H per liter of medium were added Sporozoites. The sucrose concentration above the upper limit was negatively correlated with sporulation (r = -0.50, r = -0.98), but positively correlated with vegetative growth (r = 0.65, r = 0.98). When the concentration of vitamin H is too high or too low, the amount of conidia spores decreased. After the addition of vitamin H, the sporulation of A. macrosporum and the growth of mycelia of both pathogens increased.