Physiological and sanitary quality of seeds of açoita-cavalo (Luehea divaricata)

Abstract

The objective of this study is to characterize two lots of Luehea divaricate seeds, as its physiological and sanitary quality. Seeds were collected in the municipalities of Santa Maria (SM) and Restinga Seca (RES), located inthe central region of Rio Grande do Sul State, Brazil. Germination tests and fungi transmission were conducted in commercial substrate Carolina Soil®. The variables determined were germination indices (GI), emergency (%), symptomatic seedlings (%) and dead seeds (%).The fungi were detected using PDA test and substrate filter paper (PF). For each test it was used four replicates of 25 seeds. It has been also determined the sanity of the fruits using blotter test. The GI and percentage of emergence varied between 6.7 and 8.7 and 51 and 63%, for RES and SM lots, respectively. The fungi associated with the seeds, independent of the method were: Fusarium sp. Alternaria sp., Rhizoctonia sp. Aspergillus sp., Penicillium sp., Pestalotiopsis sp., Phoma sp. and Cladosporium sp. Fusarium and Alternaria, can be associated with symptoms in seedlings of the transmission test. The fungi presents in fruits were: Fusarium sp., Aspergilus sp., Penicillium sp., Cladosporium sp. and Alternaria sp.