Fitness is Recovered with the Decline of Dimethachlon Resistance in Laboratory-induced Mutants of Sclerotinia sclerotiorum after Long-term Cold Storage
文献类型: 外文期刊
第一作者: Li, Jin-Li
作者: Li, Jin-Li;Zhu, Fu-Xing;Wu, Feng-Ci
作者机构:
关键词: cold storage;dimethachlon resistance;fitness penalty;Sclerotinia sclerotiorum
期刊名称:PLANT PATHOLOGY JOURNAL ( 影响因子:1.795; 五年影响因子:2.314 )
ISSN: 1598-2254
年卷期: 2015 年 31 卷 3 期
页码:
收录情况: SCI
摘要: After four years of cold storage, dimethachlon resistance of two laboratory-induced resistant Sclerotinia sclerotiorum isolates SCG7 and LA50 declined by 99.5% and 98.9%, respectively, and cross resistance to iprodione and procymidone also declined dramatically. Along with the decline of fungicide resistance, osmotic sensitivity to sodium chloride and glucose decreased tremendously; mycelial growth rate, sclerotia number and weight per potato dextrose agar (PDA) plate increased on average by 118.6%, 85.5% and 64.5%, respectively; and virulence to detached leaves of oilseed rape increased by 72.7% on average. Significant negative correlations were detected between dimethachlon resistance levels and mycelia' growth rate on PDA (r = 0.980, P = 0.021), and between resistance levels and lesion diameters on detached leaves of oilseed rape plants (r = 0.997, P = 0.002). These results have profound implications for assessing the potential risk for resistance development to dicarboximide fungicides in S. sclerotiorum.
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