长穗颈不育水稻穗颈节间的细胞学研究

Study on Elongated Uppermost Internode Cell of TGMS Rice with Eui Gene

通过对长选3S和培矮64S定长的穗颈节间细胞个数统计和细胞长度的测量,得出长穗颈不育水稻穗颈节间伸长的细胞学变化规律.自然条件下长穗颈不育水稻长选3S穗颈节间比对照培矮64S长18.0cm,其纵列厚壁细胞和薄壁细胞数分别比培矮64S多1248个和580个;厚壁细胞和薄壁细胞平均长度分别比培矮64S长23.3μm和38.3μm,尤其是中部区段的厚壁细胞和薄壁细胞分别比对照长24.8μm和48.7μm;穗颈节间薄壁细胞的长度由基部区段至中部区段呈突跃式增加,而由中部至顶部区段则呈缓慢减少的趋势.隐性长穗颈温敏核不育水稻穗颈节间伸长是由细胞数目增多和细胞长度增加双重作用所致,其中后者作用更显著.

The spacial mutative rule of uppermost internode cell elongation of thermo-sensitive rice with eui gene was researched from the cell number statistic and length measure.Uppermost internode of Changxuan 3S was 18.0 cm longer than that of Peiai 64S.And the number of thick-walled and thin-walled cell were 1 248 and 580 more than those of Peiai 64S respectively,length of thick-walled and thin-walled cell of Changxuan 3S were 23.3 μm and 38.3 μm more than those of Peiai 64S respectively.The length of thick-walled and thin-walled cell of Changxuan 3S in the middle section of uppermost internode was 24.8 μm and 48.7 μm longer than those of peiai 64S extremely.Cell length of Changxuan 3S increased abruptly from group section to middle section,and thin-walled cell elongated more extremely.It is evident that the uppermost internode elongation of Changxuan 3S is due to the increase of cell numbers and cell elongation,and the effect of later was more obviously.