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首页> 外文期刊>Plant Pathology Journal >Studies on Coloured Leaf Spot Disease of Alchornea cordifolia Caused by Taphrina deformans
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Studies on Coloured Leaf Spot Disease of Alchornea cordifolia Caused by Taphrina deformans

机译：变形毛deform引起的球果白化病叶斑病研究

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The coloured leaf spot disease of Alchornea cordifolia leaves was investigated and the fungal causal agent was isolated on yeast malt extract agar. The epidemiology of the disease on the university of Lagos, Akoka campus was also studied. Taphrina deformans was isolated from the diseased leaves of Alchornea cordifolia. The coloured leaf spot disease is characterised by an initial appearance of pink spots on the leaves, as the disease progresses, an intermediate stage occurs which is brownish-red in colour and eventually turned brown at the old stage. The disease epidemic is rampant between June and November of the year. The average leaf area of the pink spot was 1.61±0.22 cm~2 and brown spot was 1.74±0.13 cm~2. The mean leaf area of the healthy leaf is 8.64±0.15 cm~2. Free hand sections of the diseased leaves revealed the presence of T. deformans ascus on the epidermal layer of A. cordifolia leaf, rupturing the epidemis to reveal the ascus, as well as disjointed intercellular presence of the fungal hyphae. The chlorophyll content of the healthy leaves of A. cordifolia was 0.24±0.059 mu g g~(-1), while the diseased leaves had 0.22±0.099, 0.22±0.065 and 0.16±0.070 mu g g~(-1) chlorophyll content for the pink, brown-red and brown spot stages.T. deformans grew best on A. cordifolia leaf extract broth than on potato dextrose broth and yeast malt extract broth.
机译：研究了Alchornea cordifolia叶片的有色叶斑病，并在酵母麦芽提取物琼脂上分离了真菌病因。还对拉各斯大学阿科卡分校的这种疾病的流行病学进行了研究。从病媒Alchornea cordifolia的患病叶子中分离出Taprina（变形虫）。彩色叶斑病的特征是在叶子上最初出现粉红色斑点，随着疾病的发展，出现了中间阶段，该阶段为棕红色，最终在旧阶段变成褐色。该病的流行在该年的六月和十一月之间。粉色斑点的平均叶面积为1.61±0.22 cm〜2，棕色斑点的平均叶面积为1.74±0.13 cm〜2。健康叶片的平均叶面积为8.64±0.15 cm〜2。患病叶子的徒手切面显示了在串叶苜蓿叶的表皮层上存在变形衣原体曲霉，破坏了流行病以揭示曲霉，以及真菌菌丝的脱细胞存在。堇菜健康叶片的叶绿素含量为0.24±0.059 mu gg〜（-1），患病叶片中叶的叶绿素含量为0.22±0.099、0.22±0.065和0.16±0.070 mu gg〜（-1）。粉色，棕红色和棕点阶段。紫茎泽兰叶片提取液中的变形虫生长最好，而不是马铃薯右旋糖肉汤和酵母麦芽提取液。

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