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Endophytic Neotyphodium lolii induced tolerance to Zn stress in Lolium perenne by Fabien Monnet; Nathalie Vaillant; Adnane Hitmi; Alain Coudret; Huguette Sallanon is a Agricultural and Biological Sciences article available to read on EtoBox.

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The effect of Zn on growth, chlorophyll __a__ fluorescence, net photosynthetic rate, gas exchange, water content and mineral concentrations (Zn, Mn and Mg) in ryegrass infected with or free from __Neotyphodium lolii__ was studied by addition of ZnSO~4~ (0–20 m__M__) to the nutrient solution. Zn induced a decrease in growth of plants at 1, 5 and 10 m__M__ and cessation of growth at 20 m__M__ ZnSO~4~. From 1 to 10 m__M__, the decrease was less pronounced in the presence of the endophytic fungus than in its absence. The growth limitation was due to an accumulation of Zn in leaves. From 8 to 15 days, the presence of the fungus in the plant led to a limitation of the Zn concentration in the leaves (24–32% lower with __N. lolii__ than without). This restriction of Zn concentrations in leaves also had a beneficial effect on photosystem II (PSII) activities, net photosynthetic rate and internal CO~2~ concentration. Particularly at 1 and 5 m__M__, the quantum yield of electron flow throughout PSII was greater in the presence of the fungus than in its absence and at 5 and 10 m__M__, the internal CO~2~ concentration was maintained at a normal level. Compared with the endophyte‐free ryegrass,

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Author

Fabien Monnet; Nathalie Vaillant; Adnane Hitmi; Alain Coudret; Huguette Sallanon

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0031-9317)

Published

2001

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)