| Establishment of an evaluation system on drought resistance of potato plantlets based on osmotic stress |
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| DOI：10.7606/j.issn.1000-7601.2016.05.03 |
| Key Words: potato water stress physiological and biochemical indicators subordinate function method |
| Author Name | Affiliation | | LOU Yan | Gansu Key Laboratory of Crop Improvement and Germplasm Enhancement/Gansu Provincial Key Laboratory of Aridland Crop Science, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | BAI Jiang-ping | Gansu Key Laboratory of Crop Improvement and Germplasm Enhancement/Gansu Provincial Key Laboratory of Aridland Crop Science, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YANG Hong-yu | Gansu Key Laboratory of Crop Improvement and Germplasm Enhancement/Gansu Provincial Key Laboratory of Aridland Crop Science, Lanzhou, Gansu 730070, China
College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | GAO Hui-juan | Gansu Key Laboratory of Crop Improvement and Germplasm Enhancement/Gansu Provincial Key Laboratory of Aridland Crop Science, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHANG Jun-lian | Gansu Key Laboratory of Crop Improvement and Germplasm Enhancement/Gansu Provincial Key Laboratory of Aridland Crop Science, Lanzhou, Gansu 730070, China
College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WANG Di | Gansu Key Laboratory of Crop Improvement and Germplasm Enhancement/Gansu Provincial Key Laboratory of Aridland Crop Science, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| To explore the physiological and biochemical mechanism of drought resistance and establish an efficient drought-resistant evaluation system on potato plantlets, the effect of the PEG (polyethylene glycol 6000) simulated drought stress on the physiological and biochemical parameters for plantlets of potato varieties including CIP 397098.12, CIP 391180.6, CIP 391724.1, CIP 392745.7, CIP 392759.1, CIP 393613.2, CIP 397035.26, CIP 302476.108, CIP 304345.102, CIP 304405.47, CIP 391930.1, CIP 391931.1, Longshu3 and Atlantic, and the drought-resistant abilities of testing materials were comprehensively evaluated using the method of Subordinate Function Analysis. The results showed that increase of PEG concentration inhibited the growth of potato seedlings, especially the length of root system that was seriously affected. When 9% PEG was applied, five growth indicators of the samples, such as plant height, root length, etc., were significantly lower than those in the control samples. Therefore, 9% PEG6000 was the optimal concentration to simulate water stress for potato seedlings. According to the value of the comprehensive evaluation, drought resistance of these varieties from strong to weak could be ranked as follows: Longshu3>CIP 391930.1>CIP 397098.12>CIP 391931.1>CIP 304405.47>CIP 392759.1>CIP 397035.26>CIP 393613.2>CIP 302476.108>CIP 304345.102>CIP 391180.6>Atlantic>CIP 391724.1>CIP 392745.7. |
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