Abstract

This pot experiment was conducted to evaluate the effects of the inoculation by the mycorrhizal species (Funneliformis mosseae and Rhizophagus intraradices) in salt-tolerant and -sensitive wheat cultivars (Roshan and Bahar) under three salinity levels (0, 75, and 150 mM NaCl). Salinity significantly decreased shoot and root biomass of both cultivars but to a smaller extent in Roshan. The reductions in biomass were accompanied by decreases in N, P, and K and increases in proline and Malondialdehyde (MDA) and antioxidant enzyme activity. The salt-tolerant cultivar showed less decreases in nutrient content and higher increases in proline and antioxidant enzyme activities. Peroxidase as compared to catalase and ascorbate peroxidase showed a higher contribution in salt tolerance induction. Mycorrhizal inoculation improved plant growth by increasing nutrient content, antioxidant enzyme activity, and decreasing lipid peroxidation. The positive effects of inoculation were in most cases greater on the plants inoculated by F. mosseae. The superiority of this species was associated with lower increases in MDA and H₂O₂ accompanied by greater increases in the root area and volume, shoot N, P, and K/Na and antioxidant enzyme activities. Higher benefits from mycorrhizal inoculation were taken as the level of salinity was increased. The salt-tolerant cultivar was more positively responsive to mycorrhizal inoculation under non-saline treatment, but the sensitive cultivar was more affected by inoculation under saline conditions. The results from this experiment showed that mycorrhizal inoculation could promote the growth and salt tolerance of wheat cultivars by improving osmoregulation, antioxidant enzyme activity, and reducing lipid peroxidation.

摘要

进行该盆栽试验是为了评估菌根物种（Funneliformis mosseae和Rhizophagus intraradices）接种的效果。) 在三种盐度水平（0、75 和 150 mM NaCl）下耐盐和敏感的小麦品种（Roshan 和 Bahar）。盐分显着降低了两个品种的地上部和根系生物量，但在肉山降低的程度较小。生物量的减少伴随着 N、P 和 K 的减少以及脯氨酸和丙二醛 (MDA) 和抗氧化酶活性的增加。耐盐品种的营养成分减少较少，脯氨酸和抗氧化酶活性增加较多。与过氧化氢酶和抗坏血酸过氧化物酶相比，过氧化物酶在耐盐诱导中表现出更高的贡献。菌根接种通过增加营养成分、抗氧化酶活性和减少脂质过氧化来改善植物生长。F.苔藓。该物种的优势与 MDA 和 H ₂ O _{2 的}较低增加有关，伴随着根面积和体积、芽 N、P 和 K/Na 以及抗氧化酶活性的较大增加。随着盐度水平的增加，菌根接种的益处更大。耐盐品种在非盐水处理下对菌根接种反应更积极，但敏感品种在盐水条件下接种的影响更大。本试验结果表明，接种菌根可通过改善渗透调节、抗氧化酶活性和降低脂质过氧化作用，促进小麦品种的生长和耐盐性。