拟南芥ft-1突变体对非生物胁迫的响应

对植物生存与生长不利的不良环境称逆境。在逆境条件下,植物往往提早开花,快速完成生活史来适应逆境。因此,开花基因与逆境有着密切的关系。本研究以拟南芥(Arabidopsis thaliana)开花基因FLOWERING LOCUST(FT)突变体ft-1和野生型Col-0为材料,对在胁迫下生长的幼苗主根长进行了表型分析。结果显示,在正常条件下生长的ft-1突变体与Col-0根长相似。突变体ft-1和野生型Col-0对NaCl处理显示出极显著差异,且只在高浓度渗透胁迫下表现出显著差异。表明ft-1可能参与植株抗盐过程,与渗透胁迫关系不大。磷盐与钾盐处理与渗透处理结果类似。铵盐下生长的突变体ft-1和野生型Col-0的根长无显著差异,表明ft-1可能不参与铵盐胁迫。硝盐和混合氮盐处理下,两者均产生了极显著或显著差异,表明ft-1可能参与硝盐胁迫过程。

Response of the Arabidopsis ft-1 Mutant to Abiotic Stresses

Adverse environmental condition for plant survival and growth being unfavorable is called adversity or stress.Under the adverse conditions,plants tend to bloom early,and quickly complete its life cycle to adapt to stress.Therefore,the flowering genes has a close relationship with adaption to adversities.In this research,Arabidopsis flowering gene FLOWERING LOCUS T(FT) mutant ft-1 was employed to analyze such a relationship,compared to its wild-type Col-0,through analyzing the root length of seedling growth in the stresses.The results showed that the root length of ft-1 and Col-0 are similar in normal condition.In NaCl treatment mutant ft-1 and wild-type Col-0 showed a more significant difference,and showed significant differences only in the high concentration of osmotic stress.That ft-1 may be involved in the plant salt resistance process but for osmotic stress has little to do.Phosphonium salts and potassium salts showed a similar results with infiltration stress.Under Ammonium salt stress the root length of mutant ft-1 and wild-type Col-0 had no significant differences,indicating that the ft-1 maybe not involved in the ammonium salt stress.Nitrate and mixed nitrogen salt treatment,both had a more significant or significant differences,indicating that the ft-1 may be involved in nitrate stress.