接种丛枝菌根对玉米生长与抗旱性的影响

Influence of mycorrhiza on the growth and drought resistance of maize

采用盆栽试验,研究了水分胁迫下接种丛枝菌根真菌对玉米生长及其抗旱性的影响。结果表明:玉米与丛枝菌根可形成良好的共生关系,接种丛枝菌根显著提高了玉米生物量、株高、地径。与未接菌相比,接菌提高了植株水分利用效率,水分胁迫和正常供水条件下,较对照分别提高117%和24.6%。接菌后玉米叶片SPAD值和可溶性蛋白含量增加,叶片过氧化氢酶活性增强。同时,接种菌根显著降低了植株叶片脯氨酸、丙二醛含量,干旱胁迫和正常供水条件下,较未接菌处理分别降低了14.1%、18.9%和59%、69%。由此可见,接种丛枝菌根真菌能够促进玉米的生长,缓解干旱胁迫对玉米生长造成的不利影响,提高了玉米的抗旱性。

A pot experiment was conducted in this research to study the influence of mycorrhiza on maize growth and its drought tolerance under water stress .The results indicated that good symbiosis could be formed between maize and ar-buscular mycorrhizal ,and the inoculation of arbuscular mycorrhizal significantly improved maize biomass ,plant height , and ground diameter .Compared with non-mycorrhizal plants ,the inoculation under drought stress and normal water sup-ply increased plant water use efficiency by 117% and 24 .6% ,respectively .The SPAD value and soluble protein con-tents in maize with inoculation were also increased .In addition ,the inoculation was favorable for the increase of plant catalase activity .Meanwhile ,mycorrhizal inoculation significantly reduced proline and malondialdehyde contents in leaf by 14 .1% and 18 .9% respectively under drought stress ,and 59% and 69% respectively with normal water supply .In conclusion ,arbuscular mycorrhizal fungi could promote the growth of maize ,relieve the adverse impact of drought stress on maize growth ,and improve the drought resistance capability of maize .