Phylloplane microfungal metabolite influences activity of RuBisCO
2014
Mitra, Joyeeta | Sahi, A.N. | Paul, P.K.
The phylloplane microbes are known to affect systemic acquired resistance in plants against a broad spectrum of pathogens. The influence of phylloplane microbes and their metabolites on physiology and biochemistry of plants is well-documented but their effect on the physiology and functioning of chloroplasts and mitochondria is not well understood. The present study was conducted to understand the impact of metabolite of a dominant phylloplane microfungi (Fusarium oxysporum) isolated from the phylloplane of Lycopersicon esculentum on activity of RuBisCO. Activity of RuBisCO (EC 4.1.1.39) in chloroplasts of fungal metabolite treated and untreated eight-week old tomato plants were studied. Significant increase in the activity of RuBisCO (P ⩽ 0.01), isolated from plants inoculated with the fungal metabolite was observed. The fungal metabolite could elicit the enzyme activity by about two folds (P ⩽ 0.05) within 72–96 h of treatment of tomato plants. The result demonstrates that probably phylloplane microfungi and/or their metabolites influence the photosynthetic efficiency of plants.
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