| Evaluation on drought resistance of introduced cultivars of apple dwarf rootstocks |
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| DOI：10.7606/j.issn.1000-7601.2012.04.19 |
| Key Words: apple rootstock drought resistance response mechanism membership function |
| Author Name | Affiliation | | ZHAO Xiuming | College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China | | WANG Fei | College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China | | HAN Mingyu | College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHANG Wen e | College of Agriculture, Guizhou University, Guiyang 550025, China | | TIAN Zhiguo | College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHAO Dan | College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Five two-year-old apple drawing stock varieties（F1, F2, F3, F4 and M26）were grafted on the apple rootstock of Mauls prunifolia (Wild.) Bork. Physiological and biochemical indices were measured, and physiological responses of apple rootstocks to drought stress were studied. The results showed that: the survival rate of No. 4 was the highest up to 100%, No. 3 was the lowest of 75.00% after water stressed 50 d, the drought indices of combinations showed an upward trend as the stress increasing, and the minimum of No. 4 was 40.00%, the maximum of No.3 was 63.78%. The photosynthetic indices showed that the photosynthesis of No. 4 was the most, while that of No. 3 was the weakest. As the stress time was prolonged, the leaf relative water content of combinations decreased, and No. 4 w
as the maxmum, No.3 was the minimum, while proline and soluble protein content of combinations showed a rising trend, and the content of No. 4 was the maximum, the trend of protective enzyme was increasing first and then decreasing, the 3 k
inds of protective enzyme had synergism to protective plant. The values of No. 1 and No. 4 were lager of anatomical structure which was positively correlated with drought index. Drought resistance value of apple rootstocks was calculated to compare by the method of membership functions. The sequence of drought resistance was: 4>1>5>2>3. |
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