2014
DOI: 10.4322/floram.2014.012
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Abstract: Hancornia speciosa is a native tree species of the Brazilian Cerrado whose seeds are desiccation sensitive. In this study, we aimed to evaluate drying and osmotic conditioning in H. speciosa seeds. We used fresh seeds with 48% moisture content, which were slowly dried until they attained contents of 20%, 15%, 10% and 5%. To evaluate osmotic conditioning, the seeds were imbibed in 12 mL osmotic solutions at 0.0; -0.2; -0.4 and -0.6 MPa for two days. After that, they were dehydrated until their original moisture… Show more

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Cited by 6 publications
(8 citation statements)
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References 13 publications
(13 reference statements)
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“…The negative effects of slow desiccation to less than 30% water levels were also observed in a study conducted by Masetto and Scalon (2014) H. speciosa seeds subjected to desiccation under laboratory conditions (slow) negatively affected the seed vigor with 30% root protrusion at 5% water content. For the same species, Santos et al (2010) observed that desiccation under normal laboratory 502 Germination and dessication… DRESCH,D.…”
Section: Discussionmentioning
confidence: 84%
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“…The negative effects of slow desiccation to less than 30% water levels were also observed in a study conducted by Masetto and Scalon (2014) H. speciosa seeds subjected to desiccation under laboratory conditions (slow) negatively affected the seed vigor with 30% root protrusion at 5% water content. For the same species, Santos et al (2010) observed that desiccation under normal laboratory 502 Germination and dessication… DRESCH,D.…”
Section: Discussionmentioning
confidence: 84%
“…Newly processed H. speciosa seeds primed for two days in PEG 6000 (0.0; -0.2; -0.4; and -0.6 MPa) but not subjected to desiccation at low water levels displayed a decrease in germination speed and root length indicating that the priming did not improve seed vigor (MASETTO; SCALON, 2014).…”
Section: Discussionmentioning
confidence: 99%
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“…However, osmoconditioning for 10 days at −0.7 MPa resulted in increased percent germination, indicating that the Results from experiments with osmotic conditioning of seeds of several native forest species are controversial. In Hancornia speciosa (Gomes) seeds, also in the Brazilian Cerrado, seed germination and root length decreased after osmoconditioning of the seeds, indicating seed sensitivity to incubation in PEG [17]. Similar results were observed by [18] On the contrary, we recorded a significant effect of osmotic potential on the mean seed germination time (Figure 1(b)), indicating the opportunity to optimize the duration of the germination test in combination with a reduction of the osmotic potential of the soaking solution used for seed osmoconditioning.…”
Section: Resultsmentioning
confidence: 99%