Effect of fungal endophytes against rust disease of perennial ryegrass (Lolium perenne) on growth and physiological indices

Abstract

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.

CLC Number:

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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