The survival and establishment potential of spores of Cyathea delgadii Sternb. in soils from Itirapina and Moji Guaçu (SP), Brazil

Abstract

Germination of spores of Cyathea delgadii was carried out in soils collected in March 1997 (rainy season) at three depths (0-5, 5-10 and 10-15 cm) from the cerrado, open-cerrado, gallery forest and marsh at Moji Guacu and cerradao, cerrado and gallery forest at Pedregulho, in Itirapina, both in the state of Sao Paulo, Brazil. Viability of spores mixed with soil and buried in the cerrado at the Reserva in Moji Guacu were conducted for up to 10 months. The spores germinated in all soils. Germination in the soils was significantly lower than in distilled water. Germination was higher in soils from the gallery forest and cerrado than from open cerrado, cerradao and marsh. The germination was the same in the soil samples from the three depths of gallery forest, cerrado and cerradao. Spores of C. delgadii maintained viability longer when buried in cerrado soil than when dry stored at 4°C. After 10 months germination was 50.5% in buried spores against 3.8% in spores of the same age and harvest, stored at 4°C.