Arbuscular mycorrhizal propagules in soils from a tropical forest and an abandoned cornfield in Quintana Roo, Mexico: visual comparison of most-probable-number estimates
Por:
Ramos-Zapata J.A., Guadarrama P., Navarro-Alberto J., Orellana R.
Publicada:
1 feb 2011
Resumen:
The present study was aimed at comparing the number of arbuscular mycorrhizal fungi (AMF) propagules found in soil from a mature tropical forest and that found in an abandoned cornfield in Noh-Bec Quintana Roo, Mexico, during three seasons. Agricultural practices can dramatically reduce the availability and viability of AMF propagules, and in this way delay the regeneration of tropical forests in abandoned agricultural areas. In addition, rainfall seasonality, which characterizes deciduous tropical forests, may strongly influence AMF propagules density. To compare AMF propagule numbers between sites and seasons (summer rainy, winter rainy and dry season), a "most probable number" (MPN) bioassay was conducted under greenhouse conditions employing Sorgum vulgare L. as host plant. Results showed an average value of 3.5 +/- 0.41 propagules in 50 ml of soil for the mature forest while the abandoned cornfield had 15.4 +/- 5.03 propagules in 50 ml of soil. Likelihood analysis showed no statis
Filiaciones:
Ramos-Zapata J.A.:
Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Mérida, Yucatán C.P. 97000, Mexico
Guadarrama P.:
Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Sisal, Yucatan, Mexico
Navarro-Alberto J.:
Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Mérida, Yucatán C.P. 97000, Mexico
Orellana R.:
Centro de Investigación Científica de Yucatán, Mérida, Yucatán, Mexico
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