Arbuscular fungi (Glomeromycota) in the rhizosphere of Atriplex lampa at two saline environments of Cordoba (Argentina): depth influence on root colonization and the presence of morphospecies

作者：Soteras Florencia^*; Cofre Noelia; Bartoloni Jose; Cabello Marta; Becerra Alejandra

来源：Boletin de la Sociedad Argentina de Botanica, 2013, 48(2): 211-219.

• Arbuscular mycorrhizal fungi
• saline soils
• Atriplex lampa
• depth soil
• seasonality

Arbuscular fungi (Glomeromycota) in the rhizosphere of Atriplex lampa at two saline environments of Cordoba (Argentina): depth influence on root colonization and the presence of morphospecies. Atriplex lampa is a valuable fodder shrub available for browsing by livestock even during drought periods in the Chaco Phytogeographical Province. Halophytes may benefit from the association with arbuscular mycorrhizal fungi (AMF) through improved tolerance to drought and salt. Ecological studies of AMF are generally restricted to the main rooting zone. However, AMF vertical distribution and seasonal dynamics in natural saline soils of Argentina have been poorly studied. The aim of this work was to explore AMF root colonization, root concentration and to identify AMF morphoespecies in A. lampa rhizosphere in two saline environments (Salinas de Ambargasta and Salinas Grandes) of central Argentina, in five soil depth levels, during the wet and dry seasons. Despite we did not find arbuscules, AMF were found colonizing A. lampa roots in all depth levels. Salinas Grandes showed the highest root colonization value, and showed the highest root concentration, during wet season. The 20 AMF morphospecies identified in this work belonged to the genera: Acaulospora, Ambispora, Claroideoglomus, Diversispora, Funneliformis, Glomus, Septoglomus and Scutellospora. This is the second record in Argentina of AMF structures in A. lampa roots. Future studies that evaluate mycorrhizal dependency of the plant are necessary to confirm the function of the symbiosis.

• 出版日期2013-8