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| Format: | Artículo Open Access |
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Wiley
2024
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| Online-Zugang: | https://onlinelibrary.wiley.com/doi/10.1111/plb.13621 |
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| author | Z. Fan M. N. Lali H. Xiong Y. Luo Y. Wang Y. Wang M. Lu J. Wang X. He X. Shi Y. Zhang |
| author_facet | Z. Fan M. N. Lali H. Xiong Y. Luo Y. Wang Y. Wang M. Lu J. Wang X. He X. Shi Y. Zhang Z. Fan M. N. Lali H. Xiong Y. Luo Y. Wang Y. Wang M. Lu J. Wang X. He X. Shi Y. Zhang |
| collection | Wiley Open Access |
| contents | Seedlings of Poncirus trifoliata exhibit tissue‐specific detoxification in response to NH4+ toxicity Z. Fan M. N. Lali H. Xiong Y. Luo Y. Wang Y. Wang M. Lu J. Wang X. He X. Shi Y. Zhang Plant Biology Abstract Ammonium nitrogen (NH4+‐N) is essential for fruit tree growth, but the impact of excess NH4+‐N from fertilizer on evergreen citrus trees is unclear. In a climate chamber, 8‐month‐old citrus plants were exposed to five different hydroponic NH4+‐N concentrations (0, 5, 10, 15 and 20 mm) for 1 month to study effects of NH4+‐N on growth characteristics, N uptake, metabolism, antioxidant enzymes and osmotic regulatory substances. Application of 10 mm NH4+‐N adversely affected root plasma membrane integrity, root physiological functions, and plant biomass. MDA, CAT, POD, APX and SOD content were significantly correlated with leaf N metabolic enzyme activity (GOGAT, GDH, GS and NR). GDH was the primary enzyme involved in NH4+‐N assimilation in leaves, while the primary pathway involved in roots was GS‐GOGAT. Under comparatively high NH4+ addition, roots were the main organs involved in NH4+ utilization in citrus seedlings. Our results demonstrated that variations in NH4+ concentration and enzyme activity in various organs are associated with more effective N metabolism in roots than in leaves to prevent NH4+ toxicity in evergreen woody citrus plants. These results provide insight into the N forms used by citrus plants that are important for N fertilizer management. 10.1111/plb.13621 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| doi_str_mv | 10.1111/plb.13621 |
| format | Artículo Open Access |
| id | wiley_oa_10_1111_plb_13621 |
| institution | Wiley Open Access |
| license_str_mv | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| publishDate | 2024 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Seedlings of Poncirus trifoliata exhibit tissue‐specific detoxification in response to NH4+ toxicity Z. Fan M. N. Lali H. Xiong Y. Luo Y. Wang Y. Wang M. Lu J. Wang X. He X. Shi Y. Zhang Plant Biology Seedlings of Poncirus trifoliata exhibit tissue‐specific detoxification in response to NH4+ toxicity Z. Fan M. N. Lali H. Xiong Y. Luo Y. Wang Y. Wang M. Lu J. Wang X. He X. Shi Y. Zhang Plant Biology Abstract Ammonium nitrogen (NH4+‐N) is essential for fruit tree growth, but the impact of excess NH4+‐N from fertilizer on evergreen citrus trees is unclear. In a climate chamber, 8‐month‐old citrus plants were exposed to five different hydroponic NH4+‐N concentrations (0, 5, 10, 15 and 20 mm) for 1 month to study effects of NH4+‐N on growth characteristics, N uptake, metabolism, antioxidant enzymes and osmotic regulatory substances. Application of 10 mm NH4+‐N adversely affected root plasma membrane integrity, root physiological functions, and plant biomass. MDA, CAT, POD, APX and SOD content were significantly correlated with leaf N metabolic enzyme activity (GOGAT, GDH, GS and NR). GDH was the primary enzyme involved in NH4+‐N assimilation in leaves, while the primary pathway involved in roots was GS‐GOGAT. Under comparatively high NH4+ addition, roots were the main organs involved in NH4+ utilization in citrus seedlings. Our results demonstrated that variations in NH4+ concentration and enzyme activity in various organs are associated with more effective N metabolism in roots than in leaves to prevent NH4+ toxicity in evergreen woody citrus plants. These results provide insight into the N forms used by citrus plants that are important for N fertilizer management. 10.1111/plb.13621 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| title | Seedlings of Poncirus trifoliata exhibit tissue‐specific detoxification in response to NH4+ toxicity |
| topic | Plant Biology |
| url | https://onlinelibrary.wiley.com/doi/10.1111/plb.13621 |