论文部分内容阅读
以抗旱性不同的籼稻品种湘早籼32号、嘉早935和旱116为材料,研究了渗透胁迫下外源多胺调节剂对水稻胚芽鞘和幼根生长及多胺含量的影响。结果表明:渗透胁迫下,水稻胚芽鞘和幼根生长受到抑制,胚芽鞘和幼根中腐胺(Put)、亚精胺(Spd)和精胺(Spm)的含量上升,抗旱性强的嘉早935和旱116的上升幅度大于抗旱性弱的湘早籼32号;外源D-精氨酸(D-Arg)和鸟嘌呤腙(MGBG)抑制水稻胚芽鞘和幼根中Put、Spd和Spm含量的上升,加剧渗透胁迫下水稻胚芽鞘和幼根生长的受抑制程度;外源Spd能提高水稻胚芽鞘和幼根中Put,Spd和Spm含量,缓解渗透胁迫下水稻胚芽鞘生长的受抑制程度,但加剧了渗透胁迫对幼根的伤害程度。
The effects of exogenous polyamine regulators on the growth and polyamine contents of coleoptile and rootlets of rice under osmotic stress were studied using different indica rice varieties Xiangszaoxian 32, Jiaza 935 and Haidi 116 with different drought resistance. The results showed that under osmotic stress, the growth of coleoptile and root of rice was inhibited, the contents of put, spermidine and spermine (Spm) in coleoptile and root increased, Early-935 and drought-116 increased more than drought-resistant Xiangzaoxian 32; Exogenous D-Arg and MGBG inhibited Put, Spd and The increase of Spm content aggravated the inhibition of rice coleoptile and root growth under osmotic stress. Exogenous Spd increased the content of Put, Spd and Spm in coleoptile and young root of rice and alleviated the growth of rice coleoptile under osmotic stress Inhibition, but exacerbated the osmotic stress on young root damage.