biostudies-literatureKayoumu MNatural Science Foundation of Xinjiang Uygur Autonomous RegionInstitute of Cotton ResearchCentral Public-interest Scientific Institution Basal Research Fund, CAAS, the State Key Laborato-ry of Cotton Biology466https://www.ebi.ac.uk/biostudies/studies/S-EPMC9952849biostudies-literatureUnknown12(2)Phosphorus (P) is an essential macronutrient, and an important component of plant metabolism. However, little is known about the effects of low P availability on P absorption, the photosynthetic electron transport chain, and the antioxidant system in cotton. This study used cotton genotypes (sensitive FJA and DLNTDH and tolerant BX014 and LuYuan343) with contrasting low-P tolerance in a hydroponic experiment under 15 µM, 50 µM, and 500 μM P concentrations. The results showed that low P availability reduced plant development and leaf area, shoot length, and dry weight in FJA and DLNADH, compared to BX014 and LuYuan343. The low P availability decreased the gas-exchange parameters such as the net photosynthetic rate, transpiration rate, and stomatal conductance, and increased the intercellulaAntioxidants (Basel, Switzerland)Phosphorus Availability Affects the Photosynthesis and Antioxidant System of Contrasting Low-P-Tolerant Cotton Genotypes.PMC9952849Grant number 2020D01B61Y2021XK12CB2021C10Kayoumu MRuan SIqbal AGuo RDong QLi LQi QMuhammad NLi XSong MZhang XWang XGui HfalsePhosphorus Availability Affects the Photosynthesis and Antioxidant System of Contrasting Low-P-Tolerant Cotton Genotypes.Phosphorus (P) is an essential macronutrient, and an important component of plant metabolism. However, little is known about the effects of low P availability on P absorption, the photosynthetic electron transport chain, and the antioxidant system in cotton. This study used cotton genotypes (sensitive FJA and DLNTDH and tolerant BX014 and LuYuan343) with contrasting low-P tolerance in a hydroponic experiment under 15 µM, 50 µM, and 500 μM P concentrations. The results showed that low P availability reduced plant development and leaf area, shoot length, and dry weight in FJA and DLNADH, compared to BX014 and LuYuan343. The low P availability decreased the gas-exchange parameters such as the net photosynthetic rate, transpiration rate, and stomatal conductance, and increased the intercellula2023-01-01T00:00:00Z2023 Feb2025-04-26T02:42:32.933Z2025-04-06T10:35:32.913ZS-EPMC99528493683002410.3390/antiox12020466