Abstract

Some rhizospheric fungi of Solanum lycopersicum were isolated from Cairo governorate and identified in Taxonomy Department, Ain-Shams University, Cairo City, Egypt. These isolated fungi were cultivated on soil extract medium enriched with 2% (w/v) glucose and 5% (w/v) yeast extract. The cytological effects of the metabolites of these fungi on the seeds of S. lycopersicum were examined after three different intervals (6, 12 and 24 h). These cytological effects include three parameters; chromosomal aberrations, nucleic acids content, protein banding patterns. Moreover, ochratoxin A was determined in the fungal filtrate of the most effective isolate using HPLC technique. Key words: Rhizospere, fungi, Solanum lycopersicum, mitotic index, chromosomal aberrations, nucleic acids, protein patterns.

Highlights

  • The rhizosphere environment is composed of the interacting area of the plant, the soil immediately adjacent to the root and the organisms related to the roots

  • The rhizosphere is the region in which the roots must compete with the attacking roots ofadjacentplant species for space, water and mineral supplements and with soilbornemicroorganisms (Ryan et al, 2001)

  • The role played by the fungal metabolites on the host plants was investigated by many workers

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Summary

Introduction

The rhizosphere environment is composed of the interacting area of the plant, the soil immediately adjacent to the root and the organisms related to the roots. The rhizosphere is the region in which the roots must compete with the attacking roots ofadjacentplant species for space, water and mineral supplements and with soilbornemicroorganisms (Ryan et al, 2001). Local changes within the rhizosphere can include the growth and development of neighboring plant species and microorganisms. The role played by the fungal metabolites on the host plants was investigated by many workers. Some researchersaffirmed the positive role of common dandelion roots in the aggregation of organic carbon in rhizosphericarea (Kobierski et al, 2018). Some of these fungal metabolites have a cytotoxic effect to plants

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