2001
DOI: 10.1590/s1415-43662001000100021
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Seed germination of Bowdichia virgilioides Kunth, under water stress

Abstract: Bowdichia virgilioides (Leguminosae-Papilionoideae) is a native tree species in Brazil characteristic of the savannah vegetation. Seeds of this species were submitted to different osmotic potentials induced by polyethyleneglycol (PEG-6000) in order to verify their resistance to drought conditions. Seeds were previously scarified with sulphuric acid and incubated at 25 ºC with an eight hours photoperiod, at osmotic potentials of 0.0, -0.1, -0.3, -0.5, -0.7, -0.9 and -1.1 MPa. It was found that water stress resi… Show more

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Cited by 20 publications
(17 citation statements)
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References 14 publications
(16 reference statements)
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“…Poor seed germination under PEG-induced water deficit has also been observed in Bowdichia virgilioides (Silva et al, 2001), Cicer arietinum (Gupta et al, 1993;Kaur et al, 1998), and Medicago sativa (Zeid and Shedeed, 2006). As in previous experiments with A. caudatus seeds (Kępczyński, 1986b), the inhibitory effect of PEG was strongly reversed by ethephon.…”
Section: Discussionsupporting
confidence: 53%
“…Poor seed germination under PEG-induced water deficit has also been observed in Bowdichia virgilioides (Silva et al, 2001), Cicer arietinum (Gupta et al, 1993;Kaur et al, 1998), and Medicago sativa (Zeid and Shedeed, 2006). As in previous experiments with A. caudatus seeds (Kępczyński, 1986b), the inhibitory effect of PEG was strongly reversed by ethephon.…”
Section: Discussionsupporting
confidence: 53%
“…The GVI of Bowdichia virgilioides seeds was also reduced at higher osmotic potentials and totally inhibited at -0.9 MPa, sug gesting that the resistance limit for B. virgilioides to water stress is between -0.7 and -0.9 MPa (Silva et al, 2001). Similarly, the GVI of L. leucocephala seeds responds negatively to elevated levels of osmotic stress; the germination percentage presented a reduction in the order of 60%, while the GVI was reduced by 80%.…”
Section: Discussionmentioning
confidence: 89%
“…Rosa et al (2005) estudaram a germinação de sementes de Ateleia glazioviana Baill (timbó) submetidas a diferentes concentrações de PEG variando de 0 a -1,0 MPa e observaram que a germinação foi inversamente proporcional ao aumento da concentração de PEG, sendo nula em -1,0 MPa, sendo este resultado condizente com o esperado, uma vez que a concentração dos sais no meio de germinação, neste caso o PEG, controla a absorção de água pelos tecidos da semente, dificultando ou impedindo o início do processo germinativo. A ausência de germinação em potenciais muito negativos de PEG (-0,9 e -1,1 MPa) também foi constatada para sementes de Bowdichia virgilioides Kunt (sucupira) (Silva et al, 2001). Para a espécie Adenanthera pavonina L (olhode-dragão), Fonseca e Perez (2003) observaram que o limite máximo de tolerância à solução de PEG é de -0,4 MPa.…”
Section: Resultados E Discussão Experimentounclassified