| Effects of exogenous melatonin on photosynthetic characteristics and yield of oil sunflower under compound saline\|alkali stress |
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| DOI：10.7606/j.issn.1000-7601.2025.06.04 |
| Key Words: oil sunflower melatonin saline\|alkali stress photosynthesis yield |
| Author Name | Affiliation | | ZHAO Changyan | College of Agriculture, Tarim University, Alar, Xinjiang 843300, China | | JIA Xiuping | Institute of Crops Gansu Academy of Agricultural Science, Lanzhou, Gansu 730000, China | | LIU Yantao | Crop Research Institute of Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, Xinjiang 832000, China | | LIU Shengli | Crop Research Institute of Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, Xinjiang 832000, China | | LEI Zhonghua | Xinjiang Institute of Agricultural Sciences and Economic Crops, Urumqi, Xinjiang 830003, China | | WANG Peng | Crop Research Institute of Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, Xinjiang 832000, China | | ZHU Zhifeng | China Seed Group Co., Ltd., Sanya, Hainan 572024, China | | DONG Hongye | Crop Research Institute of Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, Xinjiang 832000, China | | LV Zengshuai | Crop Research Institute of Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, Xinjiang 832000, China | | DUAN Wei | Crop Research Institute of Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, Xinjiang 832000, China | | WAN Sumei | College of Agriculture, Tarim University, Alar, Xinjiang 843300, China |
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| Abstract: |
| The saline\|alkaline sensitive type (‘YE988’), saline\|alkaline intolerant type (‘S2102’), saline\|alkaline tolerant type (‘Longkuiza No.4’), and strong saline\|alkaline tolerant type (‘Chuyouzhizun 909S’) were used as experimental materials. Four melatonin concentrations of 0 (CK), 1 (K1), 10 (K2), and 100 μmol·L-1 (K3) were set at 0.6% compound saline\|alkaline concentration to explore the effects of different melatonin concentrations on photosynthetic characteristics and yield of oil sunflower under compound saline\|alkaline stress. The results showed that compared with CK treatment, K1, K2, and K3 treatments could improve the photosynthetic characteristics of oil sunflower under saline\|alkali stress, and the net photosynthetic rate at the flowering stage increased first and then decreased. ‘YE988’, ‘S2102’, ‘Longkuiza No.4’, and ‘Chuyouzhizun 909S’ reached the maximum under K2 treatment, which were 49.38, 39.47, 38.64, and 43.16 μmol·m-2·g-1, respectively, which were 2.9%~53.9% higher than CK. The yield of K2 treatment reached 5700.77, 5 855.45, 6 005.65, and 6 171.96 kg·hm-2, respectively, which was 6.6%~22.3% higher than that of CK. In summary, melatonin can alleviate the adverse effects of saline\|alkali stress on photosynthesis of oil sunflower and improve its saline\|alkali tolerance. Under the conditions of this experiment, the 10 μmol·L-1 treatment had the best effect. |
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