How does the application of mass nitrogen affect Vcmax (maximum photosynthetic rate) in plants?
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The application of nitrogen has a significant impact on Vcmax (maximum photosynthetic rate) in plants. Different studies have shown varying effects based on nitrogen levels and plant species. For instance, in soybean varieties, Vcmax initially increased significantly with nitrogen application, then stabilized . In tomato plants, an optimum nitrogen application level of 230.23 kg hm2 was found to enhance Vcmax under control conditions . Additionally, in wheat, a nitrogen dose of 225 kg ha−1 effectively promoted photosynthetic characteristics, including Vcmax, under specific nitrogen ratios . Conversely, in Panax notoginseng, high nitrogen levels led to lower Vcmax due to inhibited Rubisco activity . Therefore, the impact of nitrogen application on Vcmax varies depending on the plant species and the specific nitrogen levels applied.
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10 Citations | High nitrogen application reduces Vcmax (maximum photosynthetic rate) in plants, indicating inhibited photosynthetic capacity due to inactivated Rubisco, as observed in shade-tolerant and N-sensitive Panax notoginseng species. |
| Increased nitrogen supply enhances Vcmax (maximum photosynthetic rate) in plants by boosting chlorophyll content, carboxylation enzyme activity, total protein, and sugar content, ultimately improving photosynthetic efficiency. | |
| Nitrogen application at 225 kg ha−1 with a 6:4:0:0 ratio significantly enhances photosynthetic traits, including Vcmax, in winter wheat, promoting physiological characteristics and ultimately improving grain yield. | |
| Applying an optimal nitrogen level (around 230.23 kg hm2) enhances Vcmax (maximum photosynthetic rate) in tomato plants under high-temperature stress, aiding growth and stress tolerance. | |
21 Sep 2022 | The application of nitrogen initially increases Vcmax in plants, reaching a peak before stabilizing. Low or high nitrogen levels can decrease Vcmax, impacting photosynthetic efficiency. |
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