Experiments on germination and early growth of three rare and endemic species of Hawaiian Tetramolopium (Asteraceae)

Falkner, M.; Laven, Richard D.; Aplet, Gergory H.

doi:10.1016/s0006-3207(96)00070-5

Cited by 10 publications

(5 citation statements)

References 16 publications

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“…Germination works in different species of Mamillaria, Tetramolopium and Petrocoptis showed contradictory results and underline the need for detailed studies within the same genus (Falkner et al, 1997;Flores-Martı´nez and Manzanero-Medina, 2003;Navarro and Guitian, 2003). In this particular case, only one calcicolous species has been compared with several gypsophylous ones, so further species groups need to be studied to confirm the germination behaviour we observed with the Teucrium aggregate, such as Helianthemum spp.…”

Section: Relationship Between Germination Behaviour and Ecological Famentioning

confidence: 83%

Ecological germination requirements of the aggregate species Teucrium pumilum (Labiatae) endemic to Spain

et al. 2006

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Teucrium pumilum L., T. lepicephalum Pau, T. libanitis Schreber, T. turredanum Losa & Rivas Goday, and T. carolipaui Vicioso ex Pau (Labiatae) constitute an aggregate included in the Pumilum subsection (Polium section). These species are endemic and geographically restricted to central and south-eastern Spain. They grow under different climatic conditions and have different edaphic requirements, particularly the gypsum and lime affinities. The effects of some ecological factors (i.e. edaphic and climatic factors) on the germination parameters of these Teucrium species were investigated. The species under study differed in their germination behaviour. The majority of the germination parameters appeared more correlated to edaphic than to climatic factors and particularly to the water availability in the soil. The calcicolous T. carolipaui, which grows in the driest habitat, had a more rapid germination than the gypsophilous species. This could be due to the existence of a narrower optimal germination period for T. carolipaui. The different germination requirements of these species of Teucrium are important results to be considered in conservation programs of these endemic and endangered taxa.

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Section: Relationship Between Germination Behaviour and Ecological Famentioning

confidence: 83%

Ecological germination requirements of the aggregate species Teucrium pumilum (Labiatae) endemic to Spain

et al. 2006

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“…Many tree seeds are dormant at the time of dispersal, requiring a period of after-ripening before seeds germinate [34,35]. During that time various environmental stresses, animal feeding and pathogenic infection may make seeds lose viability [36,37]. Seeds of M. patungensis fall into the soil in autumn, and germinate in the spring next year.…”

Section: Discussionmentioning

confidence: 99%

The Ecological Characteristics of Seed Germination and Seedling Establishment of <i>Manglietia patungensis</i>: Implication for Species Conservation

Chen¹,

Liu²,

Chen

et al. 2012

AJPS

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Manglietia patungensis is an endangered species distributed aggregately in evergreen broad-leaved forest communities in Southwest China. A controlling experiment was employed to test the effects of soil type and shade degree on seed germination and seedling establishment by using four soil types and three shade treatments with five replicates. Results showed that the germination rate of M. patungensis seeds was relatively low ranging from 19% to 31%. Shade degree and soil type had no significant effect on seed germination rate, but influenced germination dynamics. Both shade degree and soil type treatments significantly affected seedling survival and seedling growth. Seedling survival rate increased with increasing light density. Increased light also promoted biomass accumulation and root development of seedlings. The biomass of the seedlings under full light condition increased 72% comparing with the seedlings under 80% shade degree. Root depth, root area and cross number increased with the increase of light density. Seedlings on farmland soil survived better than that on other three kinds of soil. The seedling survival rate in the farmland soil reached 91.4%, but was reduced to 80.3%, 78.0% and 52.8% in old-field soil, sandy soil and forest soil respectively. Total biomass, aboveground biomass and root biomass of seedlings in forest soil was the highest, followed by seedlings in sandy and old-field soils respectively, and seedlings in farmland soil ranked the least. Some suggestions were finally put forward for the conservation of M. patungensis based on the research results.

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“…As baixas percentagens de germinação das espécies investigadas, especialmente de E. elaeagnus e E. glomerulatus, refletiram os baixos percentuais de aquênios férteis produzidos. Muitas outras espécies de Asteraceae também apresentaram baixa germinabilidade (Cesarino & Zaidan 1998;Chmielewski 1999;Falkner et al 1997;Ferreira et al 2001;Figueiredo 1975;Maluf 1993;Maluf & Wizentier 1998;Ruggiero & Zaidan 1997), sendo que alguns autores verificaram altas proporções de aquênios sem sementes (Clampitt 1987;Radford & Cousens 2000;Sassaki et al 1999;Walker & Powell 1999), indicando que a baixa produção de aquênios férteis, resultando em baixa germinabilidade, ocorre com freqüência na família. Byers (1995) investigou as causas da baixa produção de sementes em Eupatorium resinosum, uma Asteraceae auto-incompatível, e verificou que tanto a deposição de quantidade insuficiente de pólen como a incompatibilidade do pólen parecem contribuir com a baixa produção de sementes em pequenas populações desta espécie.…”

Section: Discussionunclassified

“…Na família Asteraceae são numerosos os estudos sobre germinação de espécies invasoras (Corkidi et al 1991;Ferreira et al 2001;Figueiredo 1975;Garcia & Sharif 1995;Gomes & Fernandes 2002;Ladeira et al 1987;Schütz & Milberg 1997;Tamashino & Leitão Filho 1978), medicinais (Afolayan et al 1997;Ferreira et al 2001;Ladeira et al 1987) e ornamentais (Bunker 1994;Owens & Call 1985). Entretanto, poucos estudos foram realizados com espécies desta família em risco de extinção (Clampitt 1987;Falkner et al 1997;Jusaitis et al 2004;Walker & Powell 1999) ou com espécies típicas do cerrado (Cesarino & Zaidan 1998;Felippe & Silva 1984;Maluf 1993;Ruggiero & Zaidan 1997).…”

Section: Introductionunclassified

Efeitos da luz e da temperatura na germinação de sementes de Eremanthus (Asteraceae), ocorrentes na Serra do Cipó, MG, Brasil

Velten

Garcia

2005

Acta Bot. Bras.

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Estudos de germinação são importantes para a propagação de plantas, regeneração e conservação de comunidades vegetais. O objetivo deste trabalho foi avaliar a viabilidade e o comportamento germinativo de sementes de Eremanthus elaeagnus (Mart. ex DC.) Schultz-Bip, E. glomerulatus Less e E. Incanus (Less.) Less. A viabilidade das sementes foi verificada através do teste de tetrazólio. Os testes de germinação foram realizados sob luz e escuro contínuos em temperaturas constantes de 15, 20, 25, 30, 35 e 40 ºC e em temperaturas alternadas (fotoperíodo de 12 h) de 15-25, 15-30, 15-35, 20-30, 20-35 e 25-35 ºC. A viabilidade das sementes variou significativamente entre populações e diferentes anos de coleta. As percentagens de germinação das sementes foram sempre baixas, devido, principalmente, à ausência de embriões. Sementes de E. elaeagnus germinaram nas temperaturas de 15 a 30ºC, de E. glomerulatus de 20 a 30 ºC e E. incanus de 15 a 35 ºC. As três espécies germinaram na luz e no escuro, apresentando diferenças significativas entre estes dois regimes apenas nas temperaturas de 25 e 35 ºC (E. incanus) e 30 ºC (E. glomerulatus). Em comparação com as outras espécies Eremanthus incanus apresentou maiores percentagens de germinação em faixa de temperatura mais ampla e suas sementes são mais rápidas para germinar.

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Experiments on germination and early growth of three rare and endemic species of Hawaiian Tetramolopium (Asteraceae)

Cited by 10 publications

References 16 publications

Ecological germination requirements of the aggregate species Teucrium pumilum (Labiatae) endemic to Spain

Ecological germination requirements of the aggregate species Teucrium pumilum (Labiatae) endemic to Spain

The Ecological Characteristics of Seed Germination and Seedling Establishment of <i>Manglietia patungensis</i>: Implication for Species Conservation

Efeitos da luz e da temperatura na germinação de sementes de Eremanthus (Asteraceae), ocorrentes na Serra do Cipó, MG, Brasil

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Experiments on germination and early growth of three rare and endemic species of Hawaiian Tetramolopium (Asteraceae)

Cited by 10 publications

References 16 publications

Ecological germination requirements of the aggregate species Teucrium pumilum (Labiatae) endemic to Spain

Ecological germination requirements of the aggregate species Teucrium pumilum (Labiatae) endemic to Spain

The Ecological Characteristics of Seed Germination and Seedling Establishment of &lt;i&gt;Manglietia patungensis&lt;/i&gt;: Implication for Species Conservation

Efeitos da luz e da temperatura na germinação de sementes de Eremanthus (Asteraceae), ocorrentes na Serra do Cipó, MG, Brasil

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The Ecological Characteristics of Seed Germination and Seedling Establishment of <i>Manglietia patungensis</i>: Implication for Species Conservation