当前位置: X-MOL 学术Crop Pasture Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Comparison of disease severity caused by four soil-borne pathogens in winter cereal seedlings
Crop & Pasture Science ( IF 1.9 ) Pub Date : 2021-05-20 , DOI: 10.1071/cp20245
Ahmed Saad , Bethany Macdonald , Anke Martin , Noel L. Knight , Cassandra Percy

In Australia, crown rot of cereals is predominantly caused by Fusarium pseudograminearum and Fusarium culmorum, and common root rot by Bipolaris sorokiniana. Fusarium graminearum is an important pathogen causing Fusarium head blight worldwide and has also been reported to cause crown rot of wheat. The comparative ability of F. pseudograminearum, F. culmorum, F. graminearum and B. sorokiniana to cause crown rot and common root rot across a range of winter cereal species requires investigation. In glasshouse trials, we inoculated one cultivar each of barley, bread wheat, durum wheat, oat and triticale with two strains of each of the four pathogens. At 21 days after inoculation, the sub-crown internode and leaf sheaths of each plant were visually rated for brown discoloration. Shoot length and dry weight of inoculated plants were compared with those of non-inoculated controls. Barley and bread wheat had the highest disease severity ratings on leaf sheaths and sub-crown internode (64.7–99.6%), whereas oat had the lowest disease severity ratings across all pathogens (<5%). The shoot length of all cultivars was significantly reduced (by 12.2–55%, P < 0.05) when exposed to F. pseudograminearum. This study provides a comparison of pathogenicity of crown rot and common root rot pathogens and demonstrates significant variation in visual discoloration and host response across a range of winter cereals.



中文翻译:

冬季谷物幼苗中四种土壤传播病原体引起的病害严重程度比较

在澳大利亚,谷物冠腐主要是由镰刀镰刀菌镰刀菌引起的,而普通根腐菌则是由Bipolaris sorokiniana引起的禾谷镰刀菌(Fusarium graminearum)是引起全世界镰刀菌枯萎病的重要病原体,并且据报道也引起小麦的冠腐病。的比较能力F. pseudograminearumF.孢禾谷镰刀菌B. sorokiniana在整个冬季谷物品种中造成冠腐病和普通根腐病需要调查。在温室试验中,我们分别向大麦,面包小麦,硬质小麦,燕麦和黑小麦的一个品种分别接种了两种病原体的两种菌株。接种后21天,目测评估每株植物的次冠节间和叶鞘的棕色变色。将接种植物的枝条长度和干重与未接种对照的进行比较。大麦和面包小麦在叶鞘和冠下节间的病害严重程度等级最高(64.7–99.6%),而燕麦在所有病原体中的病害严重程度等级最低(<5%)。暴露于所有品种中,所有品种的苗长均显着减少(减少了12.2-55%,P <0.05)。F.假单胞菌。这项研究比较了冠腐病和普通根腐病病原体的致病性,并证明了整个冬季谷物中视觉变色和寄主反应的显着变化。

更新日期:2021-05-22
down
wechat
bug