内生真菌对感染锈病黑麦草生长和生理的影响

摘要/Abstract

摘要： 在田间条件下对带内生真菌和不带内生真菌球道黑麦草品种被锈菌不同程度感染后的生长、光合特性和生理指标进行测定。结果表明,带内生真菌的植株无论感病轻重,其病叶损失率和植株矮化程度均显著低于不带内生真菌的植株(P<0.05)。并且在轻度和重度病株中,内生真菌可提高黑麦草叶片相对含水量、可溶性糖含量、叶绿素含量,净光合速率、蒸腾速率、气孔导度,叶内游离脯氨酸含量、超氧化物歧化酶与过氧化物酶的活性;同时有效地降低了丙二醛的含量,说明内生真菌的存在可提高寄主黑麦草在田间条件下的抗锈病能力。

Abstract: The biological, photosynthetic and physiological characteristics of Neotyphodium endophyte-infected (E+) and endophyte-free (E-) perennial ryegrass (fairway cultivar) with Puccinia spp.infections were studied in a field experiment. The height and biomass of E+ plants were significantly higher than those of E- plants, and the loss of diseased leaves of E+ plants was significantly lower than that of E- plants irrespective of whether they were slightly or severely infected. The same response also occurred in the dwarf diseased leaves. For slight and severely affected plants, the contents of leaf relative water, soluble sugar, chlorophyll, proline, and net photosynthetic rate, transpiration rate and stomatal conductance as well as the activities of superoxide dismutase and peroxidase of E+ plants were significantly greater than those of E- plants. However, the malondialdehyde content of E+ plants was significantly lower than that of E- plants. In conclusion, endophyte infection improved rust disease resistance of perennial ryegrass under field conditions.

中图分类号:

马敏芝, 南志标. 内生真菌对感染锈病黑麦草生长和生理的影响[J]. 草业学报, 2011, 20(6): 150-156.

MA Min-zhi, NAN Zhi-biao. Effect of fungal endophytes against rust disease of perennial ryegrass (Lolium perenne) on growth and physiological indices[J]. Acta Prataculturae Sinica, 2011, 20(6): 150-156.

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