Interactive effects of nitrogen and potassium on photosynthesis and photosynthetic nitrogen allocation of rice leaves
Abstract Background Nitrogen (N) and potassium (K) are two important mineral nutrients in regulating leaf photosynthesis. Studying the interactive effects of N and K on regulating N allocation and photosynthesis (Pn) of rice leaves will be of great significance for further increasing leaf Pn, photos...
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| Format: | Article |
| Language: | English |
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BMC
2019-07-01
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| Series: | BMC Plant Biology |
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| Online Access: | http://link.springer.com/article/10.1186/s12870-019-1894-8 |
| _version_ | 1828789951817318400 |
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| author | Wenfeng Hou Merle Tränkner Jianwei Lu Jinyao Yan Siyuan Huang Tao Ren Rihuan Cong Xiaokun Li |
| author_facet | Wenfeng Hou Merle Tränkner Jianwei Lu Jinyao Yan Siyuan Huang Tao Ren Rihuan Cong Xiaokun Li |
| author_sort | Wenfeng Hou |
| collection | DOAJ |
| description | Abstract Background Nitrogen (N) and potassium (K) are two important mineral nutrients in regulating leaf photosynthesis. Studying the interactive effects of N and K on regulating N allocation and photosynthesis (Pn) of rice leaves will be of great significance for further increasing leaf Pn, photosynthetic N use efficiency (PNUE) and grain yield. We measured the gas exchange of rice leaves in a field experiment and tested different kinds of leaf N based on N morphology and function, and calculated the interactive effects of N and K on N allocation and the PNUE. Results Compared with N0 (0 kg N ha− 1) and K0 (0 kg K2O ha− 1) treatments, the Pn was increased by 17.1 and 12.2% with the supply of N and K. Compared with N0K0 (0 kg N and 0 kg K2O ha− 1), N0K120 (0 kg N and 120 kg K2O ha− 1) and N0K180 (0 kg N and 180 kg K2O ha− 1), N supply increased the absolute content of photosynthetic N (Npsn) by 15.1, 15.5 and 10.5% on average, and the storage N (Nstore) was increased by 32.7, 64.9 and 72.7% on average. The relative content of Npsn was decreased by 5.6, 12.1 and 14.5%, while that of Nstore was increased by 8.7, 27.8 and 33.8%. Supply of K promoted the transformation of Nstore to Npsn despite the leaf N content (Na) was indeed decreased. Compared with N0K0, N180K0 (180 kg N and 0 kg K2O ha− 1) and N270K0 (270 kg N and 0 kg K2O ha− 1), K supply increased the relative content of Npsn by 17.7, 8.8 and 7.3%, and decreased the relative content of Nstore by 24.2, 11.4 and 8.7% respectively. Conclusions This study indicated the mechanism that K supply decreased the Na but increased the Npsn content and then increased leaf Pn and PNUE from a new viewpoint of leaf N allocation. The supply of K promoted the transformation of Nstore to Npsn and increased the PNUE. The decreased Nstore mainly resulted from the decrease of non-protein N. Combined use of N and K could optimize leaf N allocation and maintain a high leaf Npsn content and PNUE. |
| first_indexed | 2024-12-12T01:21:59Z |
| format | Article |
| id | doaj.art-41569a8b32294be69ed7a26df609557f |
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| issn | 1471-2229 |
| language | English |
| last_indexed | 2024-12-12T01:21:59Z |
| publishDate | 2019-07-01 |
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| series | BMC Plant Biology |
| spelling | doaj.art-41569a8b32294be69ed7a26df609557f2022-12-22T00:43:12ZengBMCBMC Plant Biology1471-22292019-07-0119111310.1186/s12870-019-1894-8Interactive effects of nitrogen and potassium on photosynthesis and photosynthetic nitrogen allocation of rice leavesWenfeng Hou0Merle Tränkner1Jianwei Lu2Jinyao Yan3Siyuan Huang4Tao Ren5Rihuan Cong6Xiaokun Li7Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture/Microelement Research Center/College of Resources and Environment, Huazhong Agricultural UniversityDepartment of Crop Sciences, Institute of Applied Plant Nutrition (IAPN), Georg-August-University GöttingenKey Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture/Microelement Research Center/College of Resources and Environment, Huazhong Agricultural UniversityKey Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture/Microelement Research Center/College of Resources and Environment, Huazhong Agricultural UniversityKey Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture/Microelement Research Center/College of Resources and Environment, Huazhong Agricultural UniversityKey Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture/Microelement Research Center/College of Resources and Environment, Huazhong Agricultural UniversityKey Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture/Microelement Research Center/College of Resources and Environment, Huazhong Agricultural UniversityKey Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture/Microelement Research Center/College of Resources and Environment, Huazhong Agricultural UniversityAbstract Background Nitrogen (N) and potassium (K) are two important mineral nutrients in regulating leaf photosynthesis. Studying the interactive effects of N and K on regulating N allocation and photosynthesis (Pn) of rice leaves will be of great significance for further increasing leaf Pn, photosynthetic N use efficiency (PNUE) and grain yield. We measured the gas exchange of rice leaves in a field experiment and tested different kinds of leaf N based on N morphology and function, and calculated the interactive effects of N and K on N allocation and the PNUE. Results Compared with N0 (0 kg N ha− 1) and K0 (0 kg K2O ha− 1) treatments, the Pn was increased by 17.1 and 12.2% with the supply of N and K. Compared with N0K0 (0 kg N and 0 kg K2O ha− 1), N0K120 (0 kg N and 120 kg K2O ha− 1) and N0K180 (0 kg N and 180 kg K2O ha− 1), N supply increased the absolute content of photosynthetic N (Npsn) by 15.1, 15.5 and 10.5% on average, and the storage N (Nstore) was increased by 32.7, 64.9 and 72.7% on average. The relative content of Npsn was decreased by 5.6, 12.1 and 14.5%, while that of Nstore was increased by 8.7, 27.8 and 33.8%. Supply of K promoted the transformation of Nstore to Npsn despite the leaf N content (Na) was indeed decreased. Compared with N0K0, N180K0 (180 kg N and 0 kg K2O ha− 1) and N270K0 (270 kg N and 0 kg K2O ha− 1), K supply increased the relative content of Npsn by 17.7, 8.8 and 7.3%, and decreased the relative content of Nstore by 24.2, 11.4 and 8.7% respectively. Conclusions This study indicated the mechanism that K supply decreased the Na but increased the Npsn content and then increased leaf Pn and PNUE from a new viewpoint of leaf N allocation. The supply of K promoted the transformation of Nstore to Npsn and increased the PNUE. The decreased Nstore mainly resulted from the decrease of non-protein N. Combined use of N and K could optimize leaf N allocation and maintain a high leaf Npsn content and PNUE.http://link.springer.com/article/10.1186/s12870-019-1894-8NitrogenPotassiumPhotosynthesisPhotosynthetic nitrogen allocationPhotosynthetic nitrogen use efficiencyOryza sativa L |
| spellingShingle | Wenfeng Hou Merle Tränkner Jianwei Lu Jinyao Yan Siyuan Huang Tao Ren Rihuan Cong Xiaokun Li Interactive effects of nitrogen and potassium on photosynthesis and photosynthetic nitrogen allocation of rice leaves BMC Plant Biology Nitrogen Potassium Photosynthesis Photosynthetic nitrogen allocation Photosynthetic nitrogen use efficiency Oryza sativa L |
| title | Interactive effects of nitrogen and potassium on photosynthesis and photosynthetic nitrogen allocation of rice leaves |
| title_full | Interactive effects of nitrogen and potassium on photosynthesis and photosynthetic nitrogen allocation of rice leaves |
| title_fullStr | Interactive effects of nitrogen and potassium on photosynthesis and photosynthetic nitrogen allocation of rice leaves |
| title_full_unstemmed | Interactive effects of nitrogen and potassium on photosynthesis and photosynthetic nitrogen allocation of rice leaves |
| title_short | Interactive effects of nitrogen and potassium on photosynthesis and photosynthetic nitrogen allocation of rice leaves |
| title_sort | interactive effects of nitrogen and potassium on photosynthesis and photosynthetic nitrogen allocation of rice leaves |
| topic | Nitrogen Potassium Photosynthesis Photosynthetic nitrogen allocation Photosynthetic nitrogen use efficiency Oryza sativa L |
| url | http://link.springer.com/article/10.1186/s12870-019-1894-8 |
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