2026-10-14T17:32:45Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33979141 2026-09-24T04:28:21Z category_133 portal_316 item_type_3 month_year_09_2026

Table 1_Plasma membrane proteomics reveals mechanism of low potassium tolerance in two contrasting maize genotypes.xlsx Ming Zhong (151097) Shuisen Chen (14043627) Xudong Yang (355575) Xiaojie Wang (166442) Silu Li (5816756) Dian Jiao (2233303) Fei Zou (188420) Jing Li (10611) Yanye Ruan (3483671) Zhifu Guo (11720948) Pedro Garcia-Caparros (25101622) Plant Biology K efficiency low K stress maize plasma proteomics roots vitality <p>Potassium (K) deficiency is a major constraint on plant growth and crop productivity. To elucidate the genotypic mechanisms underlying maize adaptation to K deficiency, we comprehensively compared the physiological responses and 8-plex iTRAQ (4 biological replicates) based plasma membrane (PM) proteomes of two maize genotypes with contrasting K efficiency. Under low-K conditions, the K-efficient genotype (K-ef) maintained greater growth and root vitality and exhibited significantly higher K concentration and accumulation than the K inefficient genotype (K-inef). Quantitative plasma membrane (PM) proteomic analysis revealed 52 differentially accumulated proteins (DAPs) in K-ef (29 upregulated and 23 downregulated) and 49 DAPs in K-inef (38 upregulated, and 11 downregulated). These DAPs were involved in transport, signal transduction, lipid metabolism, cellular structure, and redox/defense. Integrating the physiological and proteomic data revealed that K-ef may adopt an “energy-saving” strategy by prioritizing K⁺ transport, redox defense, and Ca²⁺ signaling, whereas K-inef falls into an energy-wasting strategy and indiscriminate stress response. Our study provides valuable insights into physiological and molecular mechanisms underlying low K stress in maize roots and providing a basis to further study K nutrition in other crop species.</p> 2026-09-24T04:28:21Z Dataset Dataset 10.3389/fpls.2026.1957989.s001 https://figshare.com/articles/dataset/Table_1_Plasma_membrane_proteomics_reveals_mechanism_of_low_potassium_tolerance_in_two_contrasting_maize_genotypes_xlsx/33979141 CC BY 4.0