Distribution of vesicular-arbuscular mycorrhizae in the plants and rhizosphere soils of the tropical plains, Tamil Nadu, India

Ragupathy, Subramanyam; Mahadevan, A.

doi:10.1007/bf00208920

Cited by 49 publications

(34 citation statements)

References 9 publications

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“…Nevertheless, atypical AM characterized by the presence of only hyphae and vesicles were reported in Striga gesnerioides parasitizing Lepidagathis hamiltoniana from the high-altitude region of Maharashtra, India (Kamble & Agre 2013). Similarly, species like Chamaecrista pumila, Canscora heteroclita, Utricularia uliginosa, Lygodium flexuosum, Ficus microcarpa, Biophytum sensitivum, and Pouzolzia zeylanica previously reported to be nonmycorrhizal had AM fungal structures in the present study (Ragupathy & Mahadevan 1993;Muthukumar & Udaiyan 2000a;Khade & Rodrigues 2002). This clearly emphasizes the need for more rigorous examination of plants from different habitats to resolve the true mycorrhizal status of a plant species (Wang & Qiu 2006;Brundrett 2009).…”

Section: Incidence Of Am Fungal Colonization In Lithophytessupporting

confidence: 82%

“…In contrast to earlier observations, Striga asiatica, the obligate root hemiparasite associated with grasses was colonized by both AM and DSE fungi (Ragupathy & Mahadevan 1993;Muthukumar & Udaiyan 2000a;Gworgwor & Weber 2003). Nevertheless, atypical AM characterized by the presence of only hyphae and vesicles were reported in Striga gesnerioides parasitizing Lepidagathis hamiltoniana from the high-altitude region of Maharashtra, India (Kamble & Agre 2013).…”

Section: Incidence Of Am Fungal Colonization In Lithophytesmentioning

confidence: 59%

“…Like D. quercifolia, E. robustum examined was nonmycorrhizal. Species of Eriocaulon were reported to be both nonmycorrhizal (Ragupathy & Mahadevan 1993;Muthukumar & Udaiyan 2000a;Kumar & Muthukumar 2014) and mycorrhizal (Khan & Belik 1995;Brundrett et al 1995;Rodrigues & Bukhari 1995;Ragupathy et al 1990;Harikumar 2001). Species in Eriocaulon have adaptations to cope with an extreme shortage of soil nutrients like N and P. In addition, plants of Eriocaulon are evergreen, and any nutrient investment in leaves is amortized over an extended period, which considerably reduces its reliance on soil resources and subsequently on AM association (Keddy 2010).…”

Section: Incidence Of Am Fungal Colonization In Lithophytesmentioning

confidence: 99%

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Root fungal associations in some non-orchidaceous vascular lithophytes

2016

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Plant roots in natural ecosystems are colonized by a diverse group of fungi among which the most common and widespread are arbuscular mycorrhizal (AM) and dark septate endophyte (DSE) fungi. Th ough AM and DSE fungal associations are well reported for terricolous plant species, they are rather poorly known for lithophytic plant species. In this study, we examined AM and DSE fungal association in 72 non-orchidaceous vascular plant species growing as lithophytes in Siruvani Hills, Western Ghats of Tamilnadu, India. Sixty-nine plant species had AM and 58 species had DSE fungal associations. To our knowledge, we report AM fungal association in 42 and DSE fungal association in 53 plant species for the fi rst time. Th ere were signifi cant diff erences in total root length colonization and root length colonized by diff erent AM and DSE fungal structures among plant species. In contrast, the diff erences in AM and DSE fungal colonization among plants in various life-forms and lifecycles were not signifi cant. AM morphology reported for the fi rst time in 56 plant species was dominated by intermediate type AM morphology. A signifi cant negative relationship existed between total root length colonized by AM and DSE fungi. Th ese results clearly suggest that AM and DSE fungal associations are widespread in lithophytes.

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Section: Incidence Of Am Fungal Colonization In Lithophytessupporting

confidence: 82%

Section: Incidence Of Am Fungal Colonization In Lithophytesmentioning

confidence: 59%

Section: Incidence Of Am Fungal Colonization In Lithophytesmentioning

confidence: 99%

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Root fungal associations in some non-orchidaceous vascular lithophytes

2016

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“…For other authors (25,48), when soil conditions are suitable for spore germination, mycorrhizal colonization increases and spore numbers decreases. The linear positive (Table 4) and quadric terms (Fig.…”

Section: Discussionmentioning

confidence: 99%

Seasonal dynamics of arbuscular mycorrhizal fungi in plants of Theobroma grandiflorum Schum and Paullinia cupana Mart. of aN agroforestry system in Central Amazonia, Amazonas State, Brazil

Oliveira¹,

Oliveira²

2005

Braz. J. Microbiol.

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The seasonal dynamics of Arbuscular Mycorrhizal Fungi (AMF) was investigated in the rhizosphere of two fruit species in a terra firme (upland) ecosystem in Central Amazonia. Two host species (Theobroma grandiflorum and Paullinia cupana) and nine sampling months (August, September and December/1998, February, April, May and December/1999, February and May/2000 were studied in a completely randomized design, with five replications, set in a 2 x 9 factorial experiment. Soil (0-20 cm depth) and root samples were collected between August 1998 and May 2000. The mean percent colonization of AMF for both species reached maximal values in February and May 2000 (rainy season). In April and May 1999, February and May 2000 (rainy season) the highest AMF spore numbers were registered. The pluvial precipitation was significantly positively correlated with AMF number spores for both fruit species, and significant positive correlation only with AMF colonization of P. cupana. Soil moisture content was positively correlated with colonization and spore numbers of AMF for both species evaluated. AMF colonization and AMF spore numbers of T. grandiflorum were positively correlated with soil Mg and K concentrations. AMF spore numbers of T. grandiflorum were also negatively correlated with effective cation exchange capacity (ECEC). AMF colonization and AMF spore numbers in the rhizosphere of P. cupana were positively correlated with pH and Mn concentrations. AMF colonization was also positively correlated with AMF spore numbers for both species evaluated. In conclusion, this study showed that AMF colonization and sporulation are seasonal and dependent on host plant species, pluvial precipitation, soil moisture content and soil chemistry in Central Amazonia conditions.

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“…Another study surveyed the mycorrhizal colonization of Hawaiian angiosperms and found no colonization in plants of Polygonaceae family (Koske et al, 1992). In the tropical plains of Tamil Nadu in India, mycorrhizal fungi did not colonize any of the Polygonaceae plants (Ragupathy and Mahadevan, 1993). Furthermore, plants belonging to Polygonaceae family collected from southern Poland did not show any colonization with AMF (Pawlowska et al, 1997).…”

Section: Colonization Rates and Spore Populationmentioning

confidence: 99%