Distribution of Deoxynivalenol in Fusarium graminearum-Infected Maize Ears
Distribution of Deoxynivalenol in Fusarium graminearum-Infected Maize Ears
复制标题
脱氧雪腐镰刀菌烯醇在禾谷镰刀菌感染玉米穗中的分布
DOI：
10.1094/phyto-86-110
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发表时间：
1996
期刊：
影响因子：
3.2
通讯作者：
R. Hamilton
中科院分区：
文献类型：
--
作者：
L. Reid;D. Mather;R. Hamilton
测定了小麦赤霉病菌毒素脱氧雪腐镰刀菌烯醇在玉米穗中的分布。在1990年和1991年，五个玉米自交系（CO272，F7，F2，A641，和CO266）和一个杂交种（CO272 × CO266）的个别穗接种后约6天，丝出现的大孢子悬浮液注射到丝通道。在10月中旬收获穗，并使用1至7的等级量表视觉评估疾病严重程度，其中1 =无感染，7 = > 75%的籽粒表现出感染症状。脱氧雪腐镰刀菌烯醇浓度测定在三个穗组织部分：无症状的内核，症状的内核，和穗轴。疾病严重程度等级和脱氧雪腐镰刀菌烯醇浓度在1990年高于1991年。在这两年和几乎所有的基因型，脱氧雪腐镰刀菌烯醇的浓度最高的是在穗轴，其次是症状的内核和无菌内核。收获时穗的病害严重程度等级与籽粒和整穗的脱氧雪腐镰刀菌烯醇浓度高度相关。
The distribution of the mycotoxin deoxynivalenol in maize ears infected with Fusarium graminearum was determined. In 1990 and 1991, individual ears of five maize inbreds (CO272, F7, F2, A641, and CO266) and one hybrid (CO272 x CO266) were inoculated at approximately 6 days after silk emergence by the injection of a macroconidial suspension into the silk channel. Ears were harvested in mid-October and disease severity was visually evaluated using a rating scale of 1 to 7, in which 1 = no infection and 7 = > 75% of the kernels exhibiting symptoms of infection. Deoxynivalenol concentrations were determined in three ear tissue fractions : symptomless kernels, symptomatic kernels, and the cob. Disease severity ratings and deoxynivalenol concentrations were higher in 1990 than in 1991. In both years and for almost all genotypes, the highest concentration of deoxynivalenol was in the cob, followed by the symptomatic kernels and the symptomless kernels. Disease severity ratings of the ears at harvest were highly correlated to deoxynivalenol concentrations of kernels and whole ears.