水稻在“种子植株 - 愈伤组织 - 再生植株”系统中的耐盐性研究Ⅰ生长反应

SALT TOLERANCE OF DIFFERENT RICE GENOTYPES IN A “SEED PLANT-CALLUS-REGENERATED PLANT” SYSTEM Ⅰ GROWTH RESPONSE

选用具有不同耐盐性的５个水稻基因型，建立“种子植株—愈伤组织—再生植株”研究系统，比较研究不同基因型系统中３个水平对ＮａＣｌ胁迫的不同反应．结果表明，ＮａＣｌ胁迫下，５个不同基因型的耐盐性在种子植株水平有显著的差异，在再生植株水平这种差异性也得到了进一步的证实．而在愈伤组织，差异不明显，甚至与植株水平有相反表现．在３个水平耐盐性相关关系分析中，种子植株与再生植株有一定的相关关系，而二者与愈伤组织均无显著相关．因此进一步证实了水稻愈伤与植株水平的耐盐性不一致，并对其原因进行了探讨．

Five rice genogypes with similar general characters but different salt tolerance were used to estblish a “seed plant-callus-regenerated plant" system in which differential responses to NaCl stress were respectively compared at the three cultural levels.The results showed that there were significant genotypic differences in salt tolerance for both the seed plant and the regenerated plant. High correlation in salt tolerance between the above two levels was also observed. In callus, however, there was no significant genotypic difference nor correlation with that of the other two levels. There results lead to the conclusion that salt tolerance at cellular level and at plant level is not consistent in rice.