a, shown are transmission electron microscopy images of chloroplast of the wild type (WT) in 5000 times in tillering stage; b, enlarged in 20000 times for WT in tillering stage; C, 5000 times for WT in jointing stage; d, 20000 times for WT in jointing stage; e, st1-2 at 5000 times in tillering stage; f, st1-2 at 20000 times in tillering stage; g, st1-2 at 5000 times in jointing stage; h, st1-2 at 20000 times in jointing stage; i, st1-3 at 5000 times in tillering stage; j, st1-3 at 20000 times in tillering stage; k, st1-3 at 5000 times in jointing stage; l, st1-3 at 20000 times in jointing stage; C, chloroplast; F, fat; G, grana; M, mitochondria; N, nucleus; OG, osmiophilic plastoglobuli; S, starch granule; TM, thylakoid membranes.