| Research on root morphology characteristics and drought resistance of winter rapeseed(Brassica campestris L.) at bud stage under PEG simulated drought |
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| DOI：10.7606/j.issn.1000-7601.2017.05.34 |
| Key Words: winter rapeseed(Brassica campestris L.) PEG drought resistance root characteristic |
| Author Name | Affiliation | | MI Chao | Improvement and Key Laboratory of Crop Genetics and Germplasm Enhancement/Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Rapeseed Engineering Research Center of Gansu Province, Lanzhou, Gansu 730070, China | | ZHAO Yan-ning | Improvement and Key Laboratory of Crop Genetics and Germplasm Enhancement/Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Rapeseed Engineering Research Center of Gansu Province, Lanzhou, Gansu 730070, China | | LIU Zi-gang | Improvement and Key Laboratory of Crop Genetics and Germplasm Enhancement/Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Rapeseed Engineering Research Center of Gansu Province, Lanzhou, Gansu 730070, China | | SUN Wan-cang | Improvement and Key Laboratory of Crop Genetics and Germplasm Enhancement/Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Rapeseed Engineering Research Center of Gansu Province, Lanzhou, Gansu 730070, China | | LIU Hai-qing | Improvement and Key Laboratory of Crop Genetics and Germplasm Enhancement/Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Rapeseed Engineering Research Center of Gansu Province, Lanzhou, Gansu 730070, China | | FANG Yan | Improvement and Key Laboratory of Crop Genetics and Germplasm Enhancement/Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Rapeseed Engineering Research Center of Gansu Province, Lanzhou, Gansu 730070, China | | LI Xue-cai | Improvement and Key Laboratory of Crop Genetics and Germplasm Enhancement/Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Rapeseed Engineering Research Center of Gansu Province, Lanzhou, Gansu 730070, China | | WU Jun-yan | Improvement and Key Laboratory of Crop Genetics and Germplasm Enhancement/Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Rapeseed Engineering Research Center of Gansu Province, Lanzhou, Gansu 730070, China |
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| Abstract: |
| This study use(d) sand culture, with 18% (w/V) polyethylene glycol (PEG6000) to simulate water stress on root morphology characteristic of 18 germinating winter rapeseed, combined with pot e
xperiment studied the root characteristics and drought resistance. The results showed that water stress had a significant inhibitory effect on root number, root weight and root/shoot ratio of winter rapeseed, and had little effect on root length. The correlation analysis demonstrated that there was a significant positive correlation between the relative root number, the relative root length and the relative vigor index, and the results could be used as an assistant index for drought resistance evaluation of winter rapeseed. Drought resistance of materials cluster analysis showed that 18 materials can be divided into five groups at a distance of 10, where are the strongest drought resistance class A, the average relative lateral root number, average relative root length, average relative root weight, the average relative shoot ratio,and the average relative vigor index is 72.90%, 100.37%, 79.60%, 119.93 and 0.64. Depending on the relative vigor index and cluster analysis, the 3 winter rapeseed (which are Ningyou 2, Longyou 7 and Pingyou 1) were identified as drought resistance. The results of the pot experiment showed that there was a significant positive correlation between the dry weight of total biomass and root/shoot ratio, root dry weight, dry weight and root length of shoots at bud stage under PEG simulated drought resistance, and the higher the early growth vigor, the stronger the growth potential. Therefore, the PEG simulated drought method can be uesed to filter the drought-resistant materials. |
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