闽楠幼苗对硝普钠——酸铝互作的生长响应研究

Growth Responses of Phoebe bournei Young Seedings to SNP-AlCl3 Interactions

为探究闽楠(Phoebe bournei)幼苗对酸铝环境的耐受性,以一年生闽楠为材料,采用双因素随机区组试验设计,研究闽楠幼苗在不同浓度硝普钠(0、0.1 mmol/L SNP)和铝(0、0.2、0.4、0.6、0.8 mmol/L AlCl3)互作环境中的生长及生物量积累状况。结果表明,随着铝浓度加大,闽楠幼苗生长受到抑制,闽楠地上与地下部分生长指标及生物量随着铝浓度升高而先升后降;相同铝浓度下,添加SNP处理可缓解铝胁迫对闽楠幼苗生长的影响。添加0.1 mmol/L SNP可以缓解低浓度(0.2~0.4 mmol/L)的铝毒害。模糊隶属度分析结果表明,0.1 mmol/L SNP+0.2 mmol/L Al处理下,有利于闽楠幼苗生长;而在0 mmol/L SNP+0.8 mmol/L Al处理下,闽楠幼苗生长状态较差。由此可见,SNP的加入对酸铝胁迫下闽楠幼苗所受到的影响有一定的缓解作用,并且在浓度为0.2~0.4 mmol/L时缓解作用较好。

To investigate the tolerance of young Phoebe bournei seedlings to acid-aluminum environments,the present ex-periment was conducted to study the growth and biomass accumulation of the seedlings at different concentrations of sodium nitroprusside(0,0.1 mmol·L-1 SNP)and aluminum(0,0.2,0.4,0.6,0.8 mmol·L-1 AlCl3)in the interactions using annual P.bournei as the material,a two-factor randomized block experimental design,and the biomass accumulation status.The results revealed that with increasing aluminum concentration,the seedlings were inhibited,and the growth indices and biomass of the above-and underground parts initially increased but then decreased with the increasing aluminum concentration.At the same aluminum concentration,the addition of SNP treatment could alleviate aluminum stress on the addition of SNP treatment was generally higher than that of no SNP treatment.Adding 0.1 mmol·L-1 SNP could alleviate the aluminum toxicity at low con-centrations(0.2-0.4 mmol·L-1).The results of fuzzy affiliation analysis revealed that the 0.1 mmol·L-1 SNP+0.2 mmol·L-1 Al treatment was the most favorable for the growth of the seedlings,whereas the growth of the seedlings was the worst under the 0 mmol·L-1 SNP+0.8 mmol·L-1 Al treatment.The addition of SNP alleviated the growth of the seedlings under acid-alumi-num stress to a certain extent,and the concentration of SNP in the range of 0.2-0.4 mmol·L-1 has the highest alleviating effect.