Maize ( Zea mays L.) is a staple food in many parts of the world. In addition to being used as grain, animal feed, production of corn ethanol, starch, syrup etc., it has been widely consumed as a vegetable in the form of baby corn and sweet corn. Banded leaf and sheath blight (BLSB) is one of the major diseases affecting maize and is caused by Rhizoctonia solani f. sp. sasakii Exner. In the experiment forty six maize inbreds were screened for their reaction against the BLSB pathogen following artificial inoculation. Two inbred lines namely, EV1417 and CML-323 produced resistant and moderately resistant disease reaction respectively. Biochemical studies indicated the presence of a high level of pre-infectional barriers in the resistant line. Further, higher level of defense related enzymatic activities of peroxidase and poly phenol oxidase were detected in the resistant inbred line. After 48 h of inoculation, in comparison to highly susceptible EV1428, electrolyte leakage was found to be stabilized in EV1417 and CML-323. This study clearly establishes the presence of effective pre-infection barriers and induced biochemical defence mechanisms operating in the resistant inbred line. The identified resistant line EV1417 is further being used in BLSB disease resistance breeding programmes.

中文翻译：

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玉米基因型对立枯丝核菌的抗性评估和生化反应。sp. sasakii Exner 引起带状叶和纹枯病

玉米（Zea mays L.）是世界许多地方的主食。除了用作谷物、动物饲料、生产玉米乙醇、淀粉、糖浆等外，它还以小玉米和甜玉米的形式作为蔬菜被广泛食用。带状叶和纹枯病 (BLSB) 是影响玉米的主要病害之一，由立枯丝核菌 (Rhizoctonia solani f) 引起。sp. 佐佐木·埃克斯纳。在实验中，筛选了 46 个玉米自交系，以观察它们在人工接种后对 BLSB 病原体的反应。两个自交系即EV1417和CML-323分别产生抗性和中抗病害反应。生化研究表明抗性系中存在高水平的感染前屏障。更多，在抗性自交系中检测到更高水平的过氧化物酶和多酚氧化酶的防御相关酶活性。接种 48 小时后，与高度敏感的 EV1428 相比，发现 EV1417 和 CML-323 中的电解质泄漏稳定。该研究清楚地确定了在抗性自交系中有效的感染前屏障和诱导生化防御机制的存在。确定的抗性品系 EV1417 正在进一步用于 BLSB 抗病育种计划。该研究清楚地确定了在抗性自交系中有效的感染前屏障和诱导生化防御机制的存在。确定的抗性品系 EV1417 正在进一步用于 BLSB 抗病育种计划。该研究清楚地确定了在抗性自交系中有效的感染前屏障和诱导生化防御机制的存在。确定的抗性品系 EV1417 正在进一步用于 BLSB 抗病育种计划。