“…A total of 19 OsAAPs have been identified from rice, and most of them have been cloned and functionally identified. Of them, OsAAP1 and OsAAP4 regulate absorption and redistribution of neutral amino acids, thereby regulating rice growth, development, and yield ( Ji et al., 2020 ; Fang et al., 2021 ; Erinaldo et al., 2022 ); OsAAP3 and OsAAP5 mainly transport alkaline amino acids, and have a negative effect on rice tillering and yield ( Lu et al., 2018 ; Wang et al., 2019 ); OsAAP6 positively regulates GPC, thereby affecting the nutritional quality of rice ( Peng et al., 2014 ); OsAAP7 and OsAAP16 can transport most amino acids (excepting aspartic acid and β-alanine) ( Taylor et al., 2015 ); OsAAP8 mutation significantly increases GPC and amino acid contents ( Peng et al., 2024 ); OsAAP10 and OsAAP11 regulate starch and protein contents in rice grains by affecting the transport of acidic and neutral amino acids, respectively ( Wang et al., 2020 ; Yang et al., 2023a ); OsAAP13 is mainly involved in amino acid transportation in above-ground parts of rice, and plays an important role in rice growth, development, and stress regulation ( Nie et al., 2023 ); OsAAP14 is involved in nitrogen metabolism and positively regulates rice axillary bud growth, tillering, and yield ( Yang et al., 2022 ); OsAAP15 affects rice yield by regulating panicle branch development ( Yang et al., 2023b ); and OsAAP17 -related alleles positively regulate yield per plant in indica rice ( Itishree et al., 2023 ). Thus, OsAAPs play important roles in regulating rice yield and quality traits.…”