Sex-specific interaction between arbuscular mycorrhizal and dark septate fungi in the dioecious plant Antennaria dioica(Asteraceae)

Vega-Frutis, R. and Varga, Sandra and Kytöviita, M.-M. (2013) Sex-specific interaction between arbuscular mycorrhizal and dark septate fungi in the dioecious plant Antennaria dioica(Asteraceae). Plant Biology, 15 (3). pp. 558-565. ISSN 1435-8603

Full content URL: http://dx.doi.org/10.1111/j.1438-8677.2012.00673.x

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Item Type:Article
Item Status:Live Archive

Abstract

Male and female plants of dioecious species often differ in their resource demands and this has been linked to secondary sexual dimorphism, including sex-specific inter- actions with other organisms such as herbivores and pollinators. However, little is known about the interaction between dioecious plants and fungal root endophytes. Plants may be simultaneously colonised by arbuscular mycorrhizal (AM) and dark septate (DS) fungi. While it is well established that AM mutualism involves reciprocal transfer of photosynthates and mineral nutrients between roots of host plants and these fungi, the role of DS fungi remains controversial. Here, we report the temporal and spatial variation in AM and DS fungi in female, male and non-reproductive Antennaria dioica plants in three natural populations in Finland during flowering and after seed production. Females had higher colonisation by AM fungi, but lower coloni- sation by DS fungi than male and non-reproductive plants. The higher AM colonisa- tion was observed during flowering, and this difference varied among populations. Our results suggest that females and males of A. dioica interact with AM and DS fungi differently and that this relationship is dependent on soil fertility.

Keywords:Dioecy, fungal root endophytes, plant-fungus interactions, secondary sexual dimorphism.
Subjects:C Biological Sciences > C180 Ecology
C Biological Sciences > C220 Mycology
C Biological Sciences > C200 Botany
Divisions:College of Science > School of Life Sciences
ID Code:17286
Deposited On:25 Apr 2015 17:52

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