Long-term nitrogen fertilization alters the partitioning of amino acids between citrus leaves and fruits
IntroductionThe growth of evergreen fruit trees is influenced by the interaction of soil nitrogen (N) and leaf amino acid contents. However, information on free amino acid contents in leaves of fruiting and non-fruiting branches during long-term N fertilizer application remains scarce.MethodsHere, a...
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Frontiers Media S.A.
2025-01-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fpls.2024.1516000/full |
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| author | Yuanlai Zhao Huaye Xiong Yayin Luo Bin Hu Jie Wang Xiaodong Tang Yuehong Wang Xiaojun Shi Xiaojun Shi Yueqiang Zhang Yueqiang Zhang Heinz Rennenberg Heinz Rennenberg |
| author_facet | Yuanlai Zhao Huaye Xiong Yayin Luo Bin Hu Jie Wang Xiaodong Tang Yuehong Wang Xiaojun Shi Xiaojun Shi Yueqiang Zhang Yueqiang Zhang Heinz Rennenberg Heinz Rennenberg |
| author_sort | Yuanlai Zhao |
| collection | DOAJ |
| description | IntroductionThe growth of evergreen fruit trees is influenced by the interaction of soil nitrogen (N) and leaf amino acid contents. However, information on free amino acid contents in leaves of fruiting and non-fruiting branches during long-term N fertilizer application remains scarce.MethodsHere, a four-year field experiment (2018-2021) in a citrus orchard revealed consistently lower total N and amino acid contents in leaves of fruiting compared to non-fruiting branches.Results and discussionAppropriate N fertilizer application increased free amino acid and total N contents in leaves of both types of branches and fruits, but excessive amounts led to decreases. Correlation analysis showed that, in the early stage of fruit development, leaves on both types of branches can meet the N requirements of the fruit (R²=0.77 for fruiting, R²=0.82 for non-fruiting). As fruits entered the swelling stage, a significant positive correlation emerged between fruiting branch leaves and fruit total N content (R²=0.68), while the R² for leaves on non-fruiting branches dropped to 0.47, indicating a shift in N supply towards leaves on fruiting branches. Proline and arginine are the most abundant amino acids in these leaves. At fruit maturity, these amino acids account for more than half of the total amino acids in the fruit (29.0% for proline and 22.2% for arginine), highlighting their crucial role in fruit development. Further research is needed to investigate amino acid transport and distribution mechanisms between citrus leaves and fruits. |
| format | Article |
| id | doaj-art-d721408a589c4ed38c543e3485d8c1ed |
| institution | Kabale University |
| issn | 1664-462X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj-art-d721408a589c4ed38c543e3485d8c1ed2025-01-13T06:10:48ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2025-01-011510.3389/fpls.2024.15160001516000Long-term nitrogen fertilization alters the partitioning of amino acids between citrus leaves and fruitsYuanlai Zhao0Huaye Xiong1Yayin Luo2Bin Hu3Jie Wang4Xiaodong Tang5Yuehong Wang6Xiaojun Shi7Xiaojun Shi8Yueqiang Zhang9Yueqiang Zhang10Heinz Rennenberg11Heinz Rennenberg12Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Chongqing, ChinaCitrus Research Institute, Southwest University, Chongqing, ChinaInterdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing, ChinaCenter of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Chongqing, ChinaInterdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing, ChinaChangshou District Agricultural Technology Research Service Center, Chongqing, ChinaHechuan District Grain and Oil Development Guidance Station, Chongqing, ChinaInterdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing, ChinaBeijing Changping Soil Quality National Observation and Research Station, Beijing, ChinaInterdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing, ChinaBeijing Changping Soil Quality National Observation and Research Station, Beijing, ChinaCenter of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Chongqing, ChinaChair of Tree Physiology, Institute of Forest Sciences, Albert-Ludwigs-Universität Freiburg Georges-Köhler-Allee, Freiburg, GermanyIntroductionThe growth of evergreen fruit trees is influenced by the interaction of soil nitrogen (N) and leaf amino acid contents. However, information on free amino acid contents in leaves of fruiting and non-fruiting branches during long-term N fertilizer application remains scarce.MethodsHere, a four-year field experiment (2018-2021) in a citrus orchard revealed consistently lower total N and amino acid contents in leaves of fruiting compared to non-fruiting branches.Results and discussionAppropriate N fertilizer application increased free amino acid and total N contents in leaves of both types of branches and fruits, but excessive amounts led to decreases. Correlation analysis showed that, in the early stage of fruit development, leaves on both types of branches can meet the N requirements of the fruit (R²=0.77 for fruiting, R²=0.82 for non-fruiting). As fruits entered the swelling stage, a significant positive correlation emerged between fruiting branch leaves and fruit total N content (R²=0.68), while the R² for leaves on non-fruiting branches dropped to 0.47, indicating a shift in N supply towards leaves on fruiting branches. Proline and arginine are the most abundant amino acids in these leaves. At fruit maturity, these amino acids account for more than half of the total amino acids in the fruit (29.0% for proline and 22.2% for arginine), highlighting their crucial role in fruit development. Further research is needed to investigate amino acid transport and distribution mechanisms between citrus leaves and fruits.https://www.frontiersin.org/articles/10.3389/fpls.2024.1516000/fullfruitingleavescitrus fruitprolinearginine |
| spellingShingle | Yuanlai Zhao Huaye Xiong Yayin Luo Bin Hu Jie Wang Xiaodong Tang Yuehong Wang Xiaojun Shi Xiaojun Shi Yueqiang Zhang Yueqiang Zhang Heinz Rennenberg Heinz Rennenberg Long-term nitrogen fertilization alters the partitioning of amino acids between citrus leaves and fruits Frontiers in Plant Science fruiting leaves citrus fruit proline arginine |
| title | Long-term nitrogen fertilization alters the partitioning of amino acids between citrus leaves and fruits |
| title_full | Long-term nitrogen fertilization alters the partitioning of amino acids between citrus leaves and fruits |
| title_fullStr | Long-term nitrogen fertilization alters the partitioning of amino acids between citrus leaves and fruits |
| title_full_unstemmed | Long-term nitrogen fertilization alters the partitioning of amino acids between citrus leaves and fruits |
| title_short | Long-term nitrogen fertilization alters the partitioning of amino acids between citrus leaves and fruits |
| title_sort | long term nitrogen fertilization alters the partitioning of amino acids between citrus leaves and fruits |
| topic | fruiting leaves citrus fruit proline arginine |
| url | https://www.frontiersin.org/articles/10.3389/fpls.2024.1516000/full |
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