ArticleFrontiers in plant science2026
Synergistic adaptation of rice root phosphorus uptake kinetics and leaf carbon-nitrogen metabolism under low-phosphorus conditions.
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background and objective: Phosphorus (P) deficiency is a major constraint on rice growth and productivity. Clarifying the physiological basis of root-shoot coordination under phosphorus limitation is essential for improving phosphorus-use efficiency in rice. Methods: Following a preliminary phenotypic screening of 156 rice germplasm resources, four rice cultivars representing two contrasting low-P tolerance groups were selected, including two tolerant cultivars (J873 and J705) and two sensitive cultivars (T35 and L20). The physiological responses of these four cultivars to low-P stress were systematically compared using the Claassen-Barber nutrient depletion method, gas exchange measurements, and enzymatic assays. Results: Phosphorus deficiency was associated with marked changes in root phosphorus uptake kinetics. The tolerant cultivars developed an uptake pattern characterized by the coexistence of high uptake capacity (high Conclusion: Coordinated regulation of root phosphorus uptake kinetics and SPS-mediated carbon partitioning is a key physiological strategy underlying rice adaptation to low-P conditions.
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