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Mycorrhiza in sedges—an overview

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Abstract

Most terrestrial plants associate with root-colonising mycorrhizal fungi, which improve the fitness of both the fungal and plant associates. However, exceptions exist both between and within plant families failing to associate with mycorrhizal fungi or in the incidence and the extent of mycotrophy, which may vary greatly. Sedges are important pioneers of disturbed habitats and often dominate vegetations like wetlands, and arctic and alpine vegetations, in which the mycorrhizal inoculum in the soil is often low or absent. In the past, sedges were often designated as non-mycorrhizal, though limited reports indicated the presence of mycorrhiza in certain species. However, studies since 1987 indicate widespread occurrence of mycorrhiza in sedges. Based on these studies, the family Cyperaceae is no longer a non-mycorrhizal family, but the mycorrhizal status of its members is greatly influenced by environmental conditions. Further, sedges appear to have several morphological adaptations to thrive in the absence of mycorrhizal association. Though mycorrhizal associations have been noted in many sedge species, the ecological role of this association is not well documented and no clear generalisation can be drawn. Similarly, the role of mycorrhizal fungi on sedge growth and nutrient uptake or non-nutritional benefits has yet to be fully ascertained. This paper reviews the current information available on the incidence of mycorrhiza in sedges and the possible reasons for low mycotrophy observed in this family.

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The senior author (T.M.) thanks the Council of Scientific and Industrial Research, New Delhi for financial assistance.

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  1. Microbiology Laboratory, Department of Botany, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India

    T. Muthukumar & K. Udaiyan

  2. Plant Physiology Laboratory, Department of Botany, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India

    P. Shanmughavel

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Muthukumar, T., Udaiyan, K. & Shanmughavel, P. Mycorrhiza in sedges—an overview. Mycorrhiza 14, 65–77 (2004). https://doi.org/10.1007/s00572-004-0296-3

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