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| Format: | Artículo científico |
| Language: | en |
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Academia Brasileira de Ciências
2013
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| Online Access: | https://www.redalyc.org/articulo.oa?id=32727844032 |
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Table of Contents:
- Osmotic conditioning and shading on the germination and on the initial growth of Myracrodruon urundeuva Allemão seedlings SILVANA P.Q. SCALON LEANDRO H.S. MOTA ROSILDA M. MUSSURY Multidisciplinaria (Ciencias Naturales y Exactas) Cerrado shading "Aroeira" Anacardiaceae PEG 6000 and KNO 3 The present work aimed to evaluate the osmotic conditioning and shading on the germination and on the initial growth of aroeira seedlings. The seeds were pre-imbibed in solutions with different concentrations of PEG (polyethylene glycol) and KNO 3 and incubated at 10°C and 20°C temperatures, during 0 (control), 12 and 24 hours. After these periods, the seeds were dried until they reached the initial levels of humidity. After that, they were put for germinating in BOD (Biochemical Oxygen Demand) chambers, at alternated 20- 30°C. The control treatment and the pre-conditionings that presented the best results in BOD germination were selected, PEG (-1.0 MPa) + KNO 3 (-1.0 MPa) and KNO 3 (-1.0 MPa), with pre-imbibition for 12h and incubated in BOD at 20°C. The seeds were sowed on trays and then they were transplanted, keeping under a net covered with 50% and 70% of shading and at sunlight. The osmotic conditioning did not change the seeds germination in BOD, but the highest aerial part size was observed in PEG -1.0 MPa + KNO 3 -1.0 MPa treatment. The shading levels at 50% and 70% and the osmotic conditioning with PEG -1.0 MPa + KNO 3 - 1.0 MPa offered a higher emergence in a greenhouse condition; however, at sunlight the seeds presented a better index of quality on the 145 th day. 2013 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32727844032 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.2 Vol.85