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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Stripe rust induced defence mechanisms in the leaves of contrasting barley genotypes (Hordeum vulgare L.) at the seedling stage
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Stripe rust induced defence mechanisms in the leaves of contrasting barley genotypes (Hordeum vulgare L.) at the seedling stage

机译：在幼苗阶段对比鲜明基因型（Hordeum Vulgare L.）叶片中的条纹锈病诱导的防御机制

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摘要

Puccinia striiformis f. sp. hordei, the causal organism of stripe rust in barley poses serious threats to its production. The present study examined the seedling response and changes in antioxidant defence system along with NADPH oxidase, hydrogen peroxide, and lipid peroxidation marker-malondialdehyde (MDA) in the four barley genotypes namely Jyoti, RD2900, RD2901, and RD2552 in response to M and G-races of stripe rust pathogen. Disease reaction showed Jyoti as susceptible genotype, RD2901 and RD2552 as resistant, whereas RD2900 behaved differentially to both the races. M-race which is predominant was found to be more virulent than G-race of barley stripe rust pathogen. RD2901 showed an increase in activities of NADPH oxidase, catalase, peroxidase, and enzymes of ascorbate-glutathione pathway along with ascorbate and glutathione pool on inoculation with M-race, which was accompanied by the decrease in hydrogen peroxide and MDA contents. Jyoti, on the other hand, showed an increase in peroxidase and glutathione-S-transferase activities only which were unable to maintain redox homeostasis. The scrutiny of data indicated an increase in ASA/DHA ratio on infection in all the genotypes irrespective of their behaviour towards the races. However, GSH/GSSG ratio significantly declined in Jyoti and increased or remained unaffected in the resistant genotypes which suggested that GSH/GSSG might be playing a vital role in imparting tolerance against stripe rust. Further, correlation studies also revealed that leaf damage was positively correlated with H2O2 and MDA contents.
机译：Puccinia striormis f。 SP。大麦条纹锈病的因果生物造成严重威胁其生产。本研究检测了四谷氧化酶，抗氧化酶，过氧化氢和脂质过氧化标志物 - 丙二醛（MDA）在四个大麦基因型中的幼苗反应及其变化，即Jyoti，RD2900，RD2901和RD2552响应于M和G. - 条纹锈病病原体。疾病反应显示Jyoti作为易感基因型，RD2901和RD2552，为抗性，而RD2900表现差异为种族。发现占主导地位的M比于大麦条纹锈病病原体比G-Grous更具毒性。 RD2901显示NADPH氧化酶，过氧化氢酶，过氧化物酶的活性的增加以及抗坏血酸 - 谷胱甘肽途径的酶以及抗坏血酸和谷胱甘肽库与M族接种，其伴随过氧化氢和MDA含量的降低。另一方面，Jyoti显示过氧化物酶和谷胱甘肽-S-转移酶活性的增加，只能维持氧化还原稳态。数据的审查表明所有基因型中的ASA / DHA比例增加了所有基因型中的感染，而不管它们对比赛的行为。然而，GSH / GSSG比在尤其中显着下降，并且在抗性基因型中增加或保持不受影响，这表明GSH / GSSG可能在赋予耐受条纹锈病的耐受性方面发挥重要作用。此外，相关性研究还揭示了叶片损伤与H 2 O 2和MDA含量呈正相关。

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