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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Comparison of cell death and accumulation of reactive oxygen species in wheat lines with or without Yr36 responding to Puccinia striiformis f. sp tritici under low and high temperatures at seedling and adult-plant stages
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Comparison of cell death and accumulation of reactive oxygen species in wheat lines with or without Yr36 responding to Puccinia striiformis f. sp tritici under low and high temperatures at seedling and adult-plant stages

机译：有或没有Yr36对小麦条锈菌反应的小麦系细胞死亡和活性氧积累的比较。幼苗和成年期的低温和高温下的小麦

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摘要

Yr36 is an important gene conferring resistance to stripe rust of wheat caused by Puccinia striiformis f. sp. tritici (Pst). To determine if the Yr36 resistance is correlated to reactive oxygen species (ROS) burst and cell death, wheat near-isogenic lines with (UC1041 + Yr36) and without (UC1041) the gene were histologically characterized for response to Pst infection. Yr36 conferred stripe rust resistance at both seedling and adult-plant stages when the gene line was tested with Pst race CYR29 at a high-temperature (HT) cycle (12 A degrees C at night and 33 A degrees C during the day). At the HT cycle, the growth of secondary hyphae was obviously suppressed in both seedlings and adult plants of UC1041 + Yr36 compared with those of UC1041. The percentages of infection sites with necrotic host cells in UC1041 + Yr36 were significantly higher than UC1041 60 hours after inoculation (hai) at both seedling and adult-plant stages. Mesophyll cell death in the inoculated UC1041 + Yr36 leaves at the HT cycle was stronger than at a low-temperature (LT) cycle (12 A degrees C at night and 18 A degrees C during the day). At the HT cycle, the level of ROS burst started increasing in the inoculated leaves of UC1041 + Yr36 when Pst hyphae started differentiating and extending, and simultaneously, the number of penetration sites with hypersensitive cell death was also increasing. The results indicate that Yr36 product affects the ROS accumulation and cell death of the host in interaction of wheat with Pst.
机译：Yr36是赋予抗条锈病小麦条锈病的重要基因。 sp。 Tritici（Pst）。为了确定Yr36抗性是否与活性氧（ROS）爆发和细胞死亡相关，我们对具有（UC1041 + Yr36）和不具有（UC1041）基因的小麦近等基因系进行了组织学表征，以了解对Pst感染的反应。当在高温（HT）循环（夜间12 A摄氏度和白天33 A摄氏度）下用Pst种CYR29测试该基因系时，Yr36在苗期和成年植株期均赋予条纹抗锈性。在HT周期，与UC1041相比，UC1041 + Yr36的幼苗和成年植物中次生菌丝的生长均受到明显抑制。在苗期和成年期接种后60小时（hai），UC1041 + Yr36中坏死宿主细胞感染位点的百分比均显着高于UC1041。在HT循环中，接种的UC1041 + Yr36叶片中的叶肉细胞死亡要强于低温（LT）循环（夜间为12 A摄氏度，白天为18 A摄氏度）。在HT周期，当Pst菌丝开始分化和扩展时，UC1041 + Yr36接种叶片中的ROS爆发水平开始增加，与此同时，具有超敏细胞死亡的穿透位点的数量也在增加。结果表明，Yr36产物在小麦与Pst相互作用中影响宿主的ROS积累和细胞死亡。

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