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Original article
Xiaoyan Yang
Corresponding Author
ORCiD: https://orcid.org/0000-0002-0691-0406
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This work is licensed under a CC BY 4.0 License. Read Full License
Background: Drought stress is an important factor limiting crop productivity worldwide. Rice is critical for food security because it is consumed by more than half of the global population. Thus, enhancing the drought tolerance of rice is crucial for ensuring the production of this important crop can satisfy the demands of future generations.
Results: Compared with wild-type plants, the sapk2 rice mutant lines were shorter and produced fewer grains per panicle and smaller grains. Subsequent analyses suggested that SAPK2 considerably influences the nitrate, phosphorus, and potassium contents of rice grains. The examination of rice seedling growth and development under nutrient-deprived conditions (−K, −N, and −P) proved that SAPK2 can significantly affect rice seedling growth and root development in hydroponic cultures lacking N and K+. Moreover, the NO3− influx rate and nitrate concentration of the analyzed plant materials indicated that SAPK2 promotes nitrate uptake and assimilation and influences the number of tillers and the number of grains per panicle by regulating nitrate-related transporters.
Conclusion: These results suggest that SAPK2 is a key target gene for rice breeders aiming to increase yield.
Keywords
Rice, SAPK2, Grain number, Grain size, NO3− influx, Drought stress, nutrient-deprived
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A new preprint design is coming!
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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Original article
Xiaoyan Yang
Corresponding Author
ORCiD: https://orcid.org/0000-0002-0691-0406
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 11 Feb, 2020
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background: Drought stress is an important factor limiting crop productivity worldwide. Rice is critical for food security because it is consumed by more than half of the global population. Thus, enhancing the drought tolerance of rice is crucial for ensuring the production of this important crop can satisfy the demands of future generations.
Results: Compared with wild-type plants, the sapk2 rice mutant lines were shorter and produced fewer grains per panicle and smaller grains. Subsequent analyses suggested that SAPK2 considerably influences the nitrate, phosphorus, and potassium contents of rice grains. The examination of rice seedling growth and development under nutrient-deprived conditions (−K, −N, and −P) proved that SAPK2 can significantly affect rice seedling growth and root development in hydroponic cultures lacking N and K+. Moreover, the NO3− influx rate and nitrate concentration of the analyzed plant materials indicated that SAPK2 promotes nitrate uptake and assimilation and influences the number of tillers and the number of grains per panicle by regulating nitrate-related transporters.
Conclusion: These results suggest that SAPK2 is a key target gene for rice breeders aiming to increase yield.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
This is a list of supplementary files associated with this preprint. Click to download.
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