《Table 2 Comprehensive evaluation of salt tolerance of four kiwifruit genotypes by principal compone

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《Growth and physiological responses of four kiwifruit genotypes to salt stress and resistance evaluation》

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1) CI，comprehensive index；μ（x），subordinative function；D，comprehensive evaluation value.2) Acva-1，Acva-2 and Acva-3 are different genotypes from Actinidia valvata Dunn.and collected from Hunan and Zhejiang provinces in China.ZM-2 is the cultivar Zhon

PCA was carried out over a total of 18 indicators in four kiwifruit genotypes grown in different salt treatments.According to the Initial Eigenvalues（>1.000），five principal components were extracted:（1）NL-MDA，SDI，LONS，NONS，RAT，OL-MDA，OL-POD and OL-SPAD；（2）NL-SOD，OL-SOD and NL-SS；（3）NL-PRO，NL-POD，OL-SS，OL-CATand OL-PRO；（4）NL-SPAD；and（5）NL-CAT，respectively.The contribution rates（%）of the five principal components were 40.3310，21.7320，11.3880，7.5680 and 5.9110，respectively，with the cumulative 86.93%.Salt tolerance efficiency（α）was the quotient of the mean of the three salttreatments divided by the control and was listed in Table 1.The evaluation results showed that the comprehensiveevaluation values（D）of four kiwifruit genotypes were0.5310，0.4681，0.6671 and 0.3464，respectively，and thesalt tolerance order was Acva-3>Acva-1>Acva-2>ZM-2（Table 2）.