(A) and (B) N concentration of dry remains (N %Dr) and seeds (N %SEEDS) under NS (225 kg·ha-1) and NL (75 kg·ha-1) conditions in SN9816, OsATG8b-overexpressing lines and osatg8b mutant. (C) Harvest index (HI), (D) Nitrogen harvest index (NHI), (E) Nitrogen use efficiency (NUE), (F) Nitrogen uptake efficiency (NUpE), (G) Partitioning of 15N in remains, (H) Partitioning of 15N in seeds (15NHI) and (I) 15NHI/HI ration was calculated as a percentage of SN9816 and used to estimate nitrogen remobilization efficiency (NRE) in SN9816 and transgenic rice under NS (225 kg·ha-1) and NL (75 kg·ha-1) conditions. Values are means ± SD (n = 12), *P < 0.05, **P < 0.01 (t-test).