Evaluation on Resistance of 16 Strawberry Varieties to Root Rot of N.clavispora and Differences in Physiological Indicators of Leaves
The resistance performance of 16 strawberry varieties widely cultivated in Yunnan Province were evaluated systematically to the root rot of N.clavispora.The differentiated strawberry variety leaves were determined by the spathered optical method for the physiological and biochemical indicators,which intended to explore the potential correlation between these indicators and their resistance performance to the root rot of N.clavispora.The experimental results showed significant differences in resistance performance among different strawberry varieties,and the specific manifestations are 3 varieties accounting for 18.75％,showing high resistance performance with the representative of Jiandehong,5 varieties accounting for 31.25％,showing middle resistance performance with the representative of Tianxianzui,4 varieties accounting for 25％,showing middle sense with the representative of Hongyan and 4 varieties accounting for 25％,showing high sense with the representative of Tianchali.The root rot of N.clavispora disease indicators of high resistance varieties,including Jiandehong,Yuexiu and Monterey were only 4.55,6.37 and 9.09,respectively,but the disease indicators of the high sense varieties were as high as 50.30 and 55.76.After inoculation with spore of N.clavispora,the soluble protein and proline concentrations in the leaves of resistant varieties were significantly higher than those of susceptible varieties,while the malondialdehyde concentration was significantly lower than that of susceptible varieties.However,there was no significant correlation between chlorophyll concentration and disease resistance.High-resistant varieties Jiandehong,Yuexiu and Monterey can further widely planted in Yunnan.
strawberrydifferent varietiesroot rot of N.clavisporaresistance differencesphysiological indicators
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