PEG模拟干旱胁迫对不同糜子品种萌发的影响

doi:10.12190/j.issn.2096-1197.2023.06.03

Abstract

Abstract: 【Objective】Explore the effect of drought stress on the germination of different Panicum miliaceum L. varieties,to clarify the drought resistance evaluation index of Panicum miliaceum L. during germination stage and the drought resistance ability of different varieties.【Methods】Twenty registered Panicum miliaceum L. varieties with large planting areas in the main producing areas were used as experimental materials. 20% PEG-6000 solution was used to simulate drought stress. Eight germination traits including germination potential,germination rate,embryo length,coleoptile length,lateral root number,radicle length,germination index and sprout index were measured. The drought resistance of Panicum miliaceum L. at germination stage was evaluated by correlation analysis and membership function analysis.【Results】Under drought stress,the germination potential,germination rate,embryo length,coleoptile length,lateral root number,radicle length,germination index and sprout index of the 20 Panicum miliaceum L. varieties were all inhibited. Among them,the germination potential,germination rate,germination index and sprout index of Longmei No. 15 were inhibited most,with reduction rates of 59.05%,43.05%,68.68%,and 65.99%,respectively. Longmei No. 7 were less inhibited,with reduction rates of 20.41%,11.49%,40.51%,and 36.78%,respectively. The membership function value comprehensive evaluation results showed that the drought resistance ability of Longmei No. 7 was stronger at 0.868,while Longmei No. 15 was weaker at 0.093. Correlation analysis showed that,relative germination index,relative germination potential,relative embryo length,relative coleoptile length,relative radicle length,and relative lateral root number were significantly correlated with the membership function comprehensive evaluation value（D value）. 【Conclusion】Longmei No. 7 was screened as strong drought resistance variety while Longmei No. 15 was the weak drought resistance variety. Relative germination index,relative germination potential,relative embryo length,relative coleoptile length,relative radicle length and relative lateral root number can be used as reference indexes for drought resistance evaluation of Panicum miliaceum L. at germination stage.

Key words: Panicum miliaceum L., Variety screening, Drought resistance evaluation, Drought stress, Germination stage

CLC Number:

S516

HU Yulu, FENG Hui, REN Jiangling, LIU Yuhan, LIU Sichen, QIAO Zhijun, CAO Xiaoning. Effects of PEG simulated drought stress on the germination of different Panicum miliaceum L. varieties[J].Journal of Northern Agriculture, 2023, 51(6): 18-27.

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URL: https://journal30.magtechjournal.com/bfnyxb/EN/10.12190/j.issn.2096-1197.2023.06.03

https://journal30.magtechjournal.com/bfnyxb/EN/Y2023/V51/I6/18

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Effects of PEG simulated drought stress on the germination of different Panicum miliaceum L. varieties

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