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首页> 外文期刊>Acta Agriculturae Scandinavica. Section B, Soil and Plant Science >Varietal Differences in Accumulation of Ochratoxin A in Barley and Wheat Cultivars after Inoculation of Penicillium verrucosum
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Varietal Differences in Accumulation of Ochratoxin A in Barley and Wheat Cultivars after Inoculation of Penicillium verrucosum

机译：接种青霉菌后大麦和小麦品种中ch曲霉毒素A积累的品种差异

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摘要

The natural content of ochratoxin A in grain samples of 6 barley, 2 bread wheat and 1 durum wheat cultivars varied from <0.1 to 0.4 ng/g grain. Samples of the analysed cultivars were surface sterilized and kept in humidity chambers at 20°C and wateractivity (a_w) 0.75 or a_w 0.85 for 8 days. For both environments, the resulting grain equilibrium water content varied between cultivars of both barley and wheat, attributable to agronomic traits. The samples were then inoculated with Penicillium verrucosum and incubated for up to 23 weeks. With time, all cultivars had increasing ochratoxin A content, with maximum content in different barley cultivars ranging from 34 to 630 ng/g grain for a_w 0.75, and 39 to 260 000 ng/g for a_w 0.85. Corresponding values for the wheat cultivars were 25 to 2 300 ng/g and 650 to 5 200 ng/g. Significant varietal differences in ochratoxin A accumulation were observed for barley (P < 0.0001), attributable to equilibrium water content, amylose content and natural ochratoxin A, and for wheat (P < 0.0001), attributable to protein content and natural ochratoxin A. Barley 'SW 1306 95/1203' and 'SW 906129 Waxy', and wheat 'SW 39103' accumulated significantly less ochratoxin A than the other cultivars.
机译：6个大麦，2个面包小麦和1个硬质小麦品种的谷物样品中of曲霉毒素A的天然含量范围从<0.1到0.4 ng / g。对所分析品种的样品进行表面灭菌，并在20°C的湿度箱中保持水分活性（a_w）0.75或a_w 0.85，保持8天。在这两种环境下，由于农艺性状，大麦和小麦两个品种的籽粒平衡水分含量都不同。然后将样品用疣状青霉接种，并孵育长达23周。随着时间的流逝，所有品种的曲霉毒素A含量都在增加，不同大麦品种的最大含量在a_w 0.75时从34到630 ng / g谷物，在a_w 0.85时从39到260 000 ng / g。小麦品种的相应值为25至2 300 ng / g和650至5 200 ng / g。大麦（P <0.0001）归因于平衡水分含量，直链淀粉含量和天然曲毒素A，曲毒素A积累存在明显差异，小麦（P <0.0001）归因于蛋白质含量和天然曲毒素A。 SW 1306 95/1203'和'SW 906129 Waxy'和小麦'SW 39103'积累的曲霉毒素A明显少于其他品种。

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