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Original article
Guanfu Fu
China National Rice Research Institute
Corresponding Author
ORCiD: https://orcid.org/0000-0002-9679-1761
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background: Nitrogen (N), phosphorus (P), and potassium (K) are important essential nutrients for plant growth and development, but how they regulate plant energy status remains unclear.
Results: In this study, we grew Nipponbare rice (Oryza sativa) seedlings in a growth chamber for 20 d at 30/24 ℃ (day/night) under natural sunlight conditions with different nutrient regimes. N appeared to play the most important role in plant growth and development, followed by P and K. The highest nonstructural carbohydrate (NSC) content, dry weight, net photosynthetic rate (PN), ATP content, and NADH dehydrogenase, cytochrome oxidase, and ATPase activities were found in the plants that received sufficient N, P, and K. The lowest values of these parameters were measured in the N-deficient plants. Higher dry matter accumulation was observed in the −K treatment than in the −P treatment, but there was no difference in the ratio of respiration rate to photosynthetic rate between these two treatments, suggesting that differences in energy production efficiency may have accounted for this result. This hypothesis was confirmed by higher ATP contents and activities of NADH dehydrogenase, cytochrome oxidase, and ATPase in the K-deficient plants than in the P-deficient plants.
Conclusion: We inferred that N, P, and K controlled rice plant growth and development by regulating the efficiency of energy production.
Keywords
Rice, Nutrients, Photosynthesis, Respiration, Plant growth and development, Energy production efficiency
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This is a list of supplementary files associated with this preprint. Click to download.
- Fig.S1.jpg
Fig.S1 Effect of NPK on the plant growth and development of rice in tap water. a, the plant morphology; b, plant height; c, tillering number per plant.
- Table.1.jpg
Table.1 The ratio among N, P and K content in rice plants under different nutrient conditions..
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This is a preprint. It has not completed peer review.
Original article
Guanfu Fu
China National Rice Research Institute
Corresponding Author
ORCiD: https://orcid.org/0000-0002-9679-1761
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 18 Mar, 2021
No community comments so far
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background: Nitrogen (N), phosphorus (P), and potassium (K) are important essential nutrients for plant growth and development, but how they regulate plant energy status remains unclear.
Results: In this study, we grew Nipponbare rice (Oryza sativa) seedlings in a growth chamber for 20 d at 30/24 ℃ (day/night) under natural sunlight conditions with different nutrient regimes. N appeared to play the most important role in plant growth and development, followed by P and K. The highest nonstructural carbohydrate (NSC) content, dry weight, net photosynthetic rate (PN), ATP content, and NADH dehydrogenase, cytochrome oxidase, and ATPase activities were found in the plants that received sufficient N, P, and K. The lowest values of these parameters were measured in the N-deficient plants. Higher dry matter accumulation was observed in the −K treatment than in the −P treatment, but there was no difference in the ratio of respiration rate to photosynthetic rate between these two treatments, suggesting that differences in energy production efficiency may have accounted for this result. This hypothesis was confirmed by higher ATP contents and activities of NADH dehydrogenase, cytochrome oxidase, and ATPase in the K-deficient plants than in the P-deficient plants.
Conclusion: We inferred that N, P, and K controlled rice plant growth and development by regulating the efficiency of energy production.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
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