| Effects of melatonin on the growth and yield of wheat under drought condition |
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| DOI：10.7606/j.issn.1000-7601.2020.05.23 |
| Key Words: melatonin coating drought stress wheat growth yield accumulation and distribution of dry matter |
| Author Name | Affiliation | | MIAO Hanxiao | College of Agronomy,State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province,Hebei Agricultural University,Baoding, Hebei 071000, China | | LI Dongxiao | College of Agronomy,State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province,Hebei Agricultural University,Baoding, Hebei 071000, China | | WANG Jiuhong | College of Agronomy,State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province,Hebei Agricultural University,Baoding, Hebei 071000, China | | SUN Yaqian | College of Agronomy,State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province,Hebei Agricultural University,Baoding, Hebei 071000, China | | LIU Li | College of Agronomy,State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province,Hebei Agricultural University,Baoding, Hebei 071000, China | | LIU Rui | College of Agronomy,State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province,Hebei Agricultural University,Baoding, Hebei 071000, China | | LI Hongye | College of Agronomy,State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province,Hebei Agricultural University,Baoding, Hebei 071000, China |
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| Abstract: |
| An artificial climate chamber experiment was conducted in Hebei Agricultural University. The effects of melatonin on plant height, leaf area, dry matter accumulation, and yield of wheat under drought stress were studied using the methods of crop growth control and indoor soil cultivation with the test materials of Jimai 22 and Hengguan 35. Six experimental treatments were set, including normal water condition(CK), drought(D), D+1 μmol·L-1,D+10 μmol·L-1,D+100 μmol·L-1, and D+300 μmol·L-1 melatonin solutions.The results showed that drought stress significantly reduced the yield of Jimai 22 by 25.43% comparing with CK. The yield of Jimai 22 under the treatment of D+100 μmol·L-1 melatonin was significantly higher than that of D by 24.73%. This treatment significantly improved plant height, leaf area, dry matter weight, and grain plumpness. For Hengguan 35, a drought\|resisting variety,the yield under drought treatment did not change significantly. The D+10 μmol·L-1 melatonin significantly increased the yield by 10.46% and 8.87% comparing with CK and D, respectively, mainly increasing in grain weight by 39.05% and 4.84%, increasing in dry matter accumulation ratio of spike by 6.69% at mature. However, higher concentrations (100 μmol·L-1,300 μmol·L-1) melatonin inhibited the yield and reduced it by 23.81% and 24.93%, respectively, comparing with control.This different effect on different wheat varieties was possibly related to the drought\|resisting conditions and concentrations of melatonin. The optional concentration of melatonin on increasing yield was 100 μmol·L-1for Jimai 22,10 μmol·L-1for Hengguan 35. Optimal concentrations of melatonin would be select to use according to different wheat varieties. |
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