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首页> 外文期刊>Crop Protection >Impact of UV-B radiation on aspects of germination and epidemiological components of three major physiological races of Puccinia striiformis f. sp tritici
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Impact of UV-B radiation on aspects of germination and epidemiological components of three major physiological races of Puccinia striiformis f. sp tritici

机译：UV-B辐射对条锈菌三个主要生理小种的萌发和流行病学组成的影响f。小麦

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摘要

Global climate change is increasingly being recognized as an uncertainty of plant diseases. In particular, the increased solar UV-B (280-315 nm) radiation reaching the earth's surface has stimulated considerable studies on plant diseases in recent decades. The effects of UV-B radiation on the urediospore germination of three physiological races of Puccinia striiformis f. sp. tritici (Pst), namely, CYR3L CYR32 and CYR33, and on epidemiological components of wheat stripe rust caused by Pst were investigated in this study. In the germination experiments, seven UV-B intensity treatments including 0 (control), 50, 100, 150, 200, 250 and 300 nw/cm(2), were set. Under each UV-B intensity, Pst urediospores were irradiated for 15, 30, 45 and 60 min. The results showed that the germinability of Pst urediospores was reduced with an enhancement of the radiation intensity and an increase in the radiation time and that CYR31 was more sensitive to UV-B radiation than CYR32 and CYR33. To investigate the effects of UV-B on the epidemiological components of wheat stripe rust, three treatments with different UV-B radiation doses were set. The results indicated that an enhancement in UV-B radiation could reduce the infection efficiency, lesion expansion rate, sporulation quantity and AUDPC and could prolong the incubation period. The results demonstrated that CYR33 was the most stable and exhibited the strongest tolerance and that CYR31 was the most vulnerable under different UV-B radiation levels. This finding indicated that CYR33 may have more advantages to survive under enhanced UV-B radiation
机译：全球气候变化越来越被认为是植物疾病的不确定性。尤其是，近几十年来，太阳UV-B（280-315 nm）辐射不断增加到达地球表面，这引起了对植物病害的大量研究。 UV-B辐射对小麦条锈菌三个生理小种的小孢子萌发的影响。 sp。研究了小麦中的小麦（Pst），即CYR3L，CYR32和CYR33，并探讨了Pst引起的小麦条锈病的流行病学组成。在发芽实验中，设置了七个UV-B强度处理，包括0（对照），50、100、150、200、250和300 nw / cm（2）。在每个UV-B强度下，照射Pst梭孢子15、30、45和60分钟。结果表明，随着辐射强度的增加和辐射时间的增加，Pst ureiospores的发芽能力降低，并且CYR31对UV-B辐射的敏感性高于CYR32和CYR33。为了研究UV-B对小麦条锈病流行病学成分的影响，设定了三种使用不同UV-B辐射剂量的处理方法。结果表明，增强UV-B辐射可降低感染效率，病灶扩展率，孢子形成量和AUDPC，延长潜伏期。结果表明，在不同的UV-B辐射水平下，CYR33最为稳定并显示出最强的耐受性，而CYR31则最脆弱。这一发现表明CYR33在增强的UV-B辐射下可能具有更多的生存优势。

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