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Interactions between substrate temperature and humidity in signalling cyclical dormancy in seeds of two perennial tropical species

Published online by Cambridge University Press:  26 February 2015

Daniela M. Duarte  and
Queila S. Garcia
Daniela M. Duarte
Affiliation:
Programa de Pós-Graduação em Biologia Vegetal, Universidade Federal de Minas Gerais, Brazil
Queila S. Garcia*
Affiliation:
Laboratório de Fisiologia Vegetal, Departamento de Botânica, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31.270-970, Belo Horizonte, MG, Brazil
*
*Correspondence E-mail: queilagarcia@gmail.com
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Abstract

The involvement of environmental factors in dormancy cycling is well known in temperate annual species, but it is not known how interaction between soil temperatures and humidity can modulate dormancy in perennial tropical species. In this study the effects were evaluated of substrate temperature and humidity on the modulation of the acquisition and overcoming of secondary dormancy in the buried seeds of two endemic Eriocaulaceae species from the rocky fields (campos rupestres) vegetation in south-eastern Brazil. Fresh seeds of Comanthera bisulcata and Syngonanthus verticillatus were buried and subsequently maintained at temperatures of 15, 20, 25 and 30°C, under three substrate humidity levels (boggy, humid and humid/dry). The seeds were exhumed every 3 months and tested for germination (20°C, 12 h photoperiod) and viability (tetrazolium test). The seeds of both species acquired dormancy after burial in all of the treatments. During the experimental period they demonstrated cycles of acquisition and overcoming of dormancy that were most evident in the treatments involving alterations of the substrate humidity (humid/dry regime) that coincided with the environmental conditions found naturally in the region of origin of the species. The seeds gradually lost dormancy during the dry period and re-acquired it when exposed again to humidity; dormancy would once again be overcome during the subsequent dry period. Burial promoted the acquisition of dormancy in C. bisulcata and S. verticillatus seeds; the lowest temperature tested favoured overcoming dormancy; and varying the humidity regime signalled the acquisition and the overcoming of secondary dormancy.

Keywords

annual dormancy cycleburied seedscampos rupestresEriocaulaceaesecondary dormancyseed banksoil humiditysoil temperature
Type
Research Papers
Information
Seed Science Research , Volume 25 , Special Issue 2: Seed Dormancy , June 2015 , pp. 170 - 178
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Copyright
Copyright © Cambridge University Press 2015 

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References

Adámoli, J.M., Goldberg, A.D. and Soriano, A. (1973) El desbloqueo de las semillas de chamico (Datura ferox L.) enterradas en el suelo; análises de los factores causuales. Revista de Investigaciones Agropecuarias INTA 10, 209–222.Google Scholar
Baskin, C.C. and Baskin, J.M. (1998) Seeds: Ecology, biogeography and evolution of dormancy and germination. San Diego, Academic Press.Google Scholar
Baskin, C.C., Chesson, P.J. and Baskin, J.M. (1993) Annual seed dormancy cycles in two desert winter annuals. Journal of Ecology 81, 551–556.Google Scholar
Baskin, C.C., Baskin, J.M. and Chester, E.W. (2000) Effect of flooding on the annual dormancy cycle and on germination of seeds of the summer annual Schoenoplectus purshianus (Cyperaceae). Aquatic Botany 67, 109–116.Google Scholar
Baskin, J.M. and Baskin, C.C. (1976) High temperature requirement for afterripening in seeds of winter annuals. New Phytologist 77, 619–624.Google Scholar
Baskin, J.M. and Bakin, C.C. (1977) Dormancy and germination in seeds of common ragweed with reference to Beals' buried seed experiment. American Journal of Botany 64, 1174–1176.CrossRefGoogle Scholar
Baskin, J.M. and Baskin, C.C. (1978) Seasonal changes in the germination response of Cyperus inflexus seeds to temperature and their ecological significance. Botanical Gazette 139, 231–235.Google Scholar
Baskin, J.M. and Baskin, C.C. (1980) Ecophysiology of secondary dormancy in seeds of Ambrosia artemisifolia . Ecology 61, 475–480.CrossRefGoogle Scholar
Baskin, J.M. and Baskin, C.C. (1988) Germination ecophysiology of herbaceous plant species in a temperate region. American Journal of Botany 75, 286–305.Google Scholar
Baskin, J.M. and Baskin, C.C. (1992) Role of temperature and light in the germination ecology of buried seeds of weedy species of disturbed forests. I. Lobelia inflata . Canadian Journal of Botany 70, 589–592.Google Scholar
Baskin, J.M. and Baskin, C.C. (1997) Methods of breaking seed dormancy in the endangered species Iliamna corei Sherff (Malvaceae), with special attention to heating. Natural Areas Journal 17, 313–323.Google Scholar
Batlla, D. and Benech-Arnold, R.L. (2006) The role of fluctuations in soil water content on the regulation of dormancy changes in buried seeds of Polygonum aviculare L. Seed Science Research 16, 47–59.CrossRefGoogle Scholar
Batlla, D. and Benech-Arnold, R.L. (2010) Predicting changes in dormancy level in natural seed soil banks. Plant Molecular Biology 73, 3–13.Google Scholar
Batlla, D., Nicoletta, M. and Benech-Arnold, R. (2007) Sensitivity of Polygonum aviculare seeds to light as affected by soil moisture conditions. Annals of Botany 99, 915–924.Google Scholar
Bauer, M.C., Meyer, S. and Allen, P. (1998) A simulation model to predict seed dormancy loss in the field for Bromus tectorum L. Journal of Experimental Botany 49, 1235–1244.Google Scholar
Benech-Arnold, R.L., Sanchez, R.A., Forcella, F., Kruk, B.C. and Ghersa, C.M. (2000) Environmental control of dormancy in weed seed banks in soil. Field Crops Research 67, 105–122.Google Scholar
Benech-Arnold, R.L., Gualano, N., Leymarie, J., Côme, D. and Corbineau, F. (2006) Hypoxia interferes with ABA metabolism and increases ABA sensitivy in embryos of dormant barley grains. Journal of Experimental Botany 57, 1423–1430.Google Scholar
Bewley, J.D. (1997) Breaking down the walls – a role for endo-β-mannanase in release from seed dormancy? Trends in Plant Science 2, 464–469.Google Scholar
Bewley, J.D., Black, M. and Halmer, P. (2006) The encyclopedia of seeds: Science technology and uses. Wallingford, UK, CAB International.Google Scholar
Bouwmeester, H.J. and Karssen, C.M. (1993) Annual changes in dormancy and germination in seeds of Sisymbrium officinale (L.) Scop. New Phytologist 124, 170–191.Google Scholar
Christensen, M., Meyer, S.E. and Allen, P.S. (1996) A hydrothermal time model of seed after-ripening in Bromus tectorum L. Seed Science Research 6, 1–9.Google Scholar
De Miguel, L.C. and Soriano, A. (1974) The breakage of dormancy in Datura ferox seeds as an effect of water absorption. Weed Research 14, 265–270.Google Scholar
Downs, M.P. and Cavers, P.B. (2000) Effects of wetting and drying on seed germination and seedling emergence of bull thistle, Cirsium vulgare (Savi) Ten. Canadian Journal of Botany 78, 1545–1551.CrossRefGoogle Scholar
Eisenlohr, P.V. (2013) Challenges in data analysis: pitfalls and suggestions for a statistical routine in vegetation ecology. Brazilian Journal of Botany 36, 83–87.Google Scholar
Footitt, S., Douterelo-Soler, I., Clay, H. and Finch-Savage, W.E. (2011) Dormancy cycling in Arabidopsis seeds is controlled by seasonally distinct hormone-signaling pathways. Proceedings of the National Academy of Sciences, USA 108, 20236–20241.Google Scholar
Garcia, Q.S., Giorni, V.T., Mueller, M. and Munné-Bosch, S. (2012) Common and distinct responses in phytohormone and vitamin E changes during seed burial and dormancy in Xyris bialata and X. peregrina . Plant Biology 14, 347–353.Google Scholar
Garcia, Q.S., Oliveira, P.G. and Duarte, D.M. (2014) Seasonal changes in germination and dormancy of buried seeds of endemic Brazilian Eriocaulaceae. Seed Science Research 24, 113–117.Google Scholar
Graeber, K.N., Bayashi, K., Miatton, E., Leubner-Metzger, G. and Soppe, W.J.J. (2012) Molecular mechanisms of seed dormancy. Plant, Cell and Environment 35, 1769–1786.Google Scholar
Handley, R.J. and Davy, A.J. (2005) Temperature effects on seed maturity and dormancy cycles in an aquatic annual, Najas marina, at the edge of its range. Journal of Ecology 93, 1185–1193.Google Scholar
Hoang, H.H., Sotta, B., Gendreau, E., Bailly, C., Leymarie, J. and Corbineau, F. (2012) Water content: a key factor of the induction of secondary dormancy in barley grains as related to ABA metabolism. Physiologia Plantarum 148, 284–296.CrossRefGoogle Scholar
Hoang, H.H., Corbineau, F. and Leymarie, J. (2013) Induction of secondary dormancy by hypoxia in barley grains and its hormonal regulation. Journal of Experimental Botany 64, 2017–2025.CrossRefGoogle ScholarPubMed
Hu, X.W., Huang, X.H. and Wang, Y.R. (2012) Hormonal and temperature regulation of seed dormancy and germination in Leymus chinensis . Plant Growth Regulation 67, 199–207.Google Scholar
Karssen, C.M. (1980/1981) Patterns of change in dormancy during burial of seeds in soil. Israel Journal of Botany 29, 65–73.Google Scholar
Kruk, B.C. and Benech-Arnold, R.L. (1998) Functional and quantitative analysis of seed thermal responses in prostrate knotweed (Polygonum aviculare L.) and common purslane (Portulaca oleracea). Weed Science 46, 83–90.Google Scholar
Kruk, C.C. and Benech-Arnold, R.L. (2000) Evaluation of dormancy and germination responses to temperature in Carduus acanthoides and Alagallis arvensis using a screening system, and relationship with field-observed emergence patterns. Seed Science Research 10, 77–88.Google Scholar
Leymarie, J., Benech-Arnold, R.L., Farrant, J.M. and Corbineau, F. (2007) Identification of transcripts potentially involved in barley seed germination and dormancy using cDNA-AFLP. Journal of Experimental Botany 3, 425–437.Google Scholar
Meulebrouck, K., Verheyen, K., Hermy, M. and Baskin, C. (2010) Will the sleeping beauties wake up? Seasonal dormancy cycles in seeds of the holoparasite Cuscuta epithymum . Seed Science Research 20, 23–30.Google Scholar
Oliveira, P.G. and Garcia, Q.S. (2011) Germination characteristics of Syngonanthus seeds (Eriocaulaceae) in campos rupestres vegetation in south-eastern Brazil. Seed Science Research 21, 39–45.Google Scholar
Ooi, M.K.J. (2012) Seed bank persistence and climate change. Seed Science Research 22, 53–60.Google Scholar
Romero, R. and Nakajima, J.N. (1999) Espécies endêmicas do Parque Estadual da Serra da Canastra, Minas Gerais. Revista Brasileira de Botanica 22, 259–265.Google Scholar
Sester, M., Dürr, C., Darmency, H. and Colbach, N. (2006) Evolution of weed beet (Beta vulgaris L.) seed bank: Quantification of seed survival, dormancy, germination and pre-emergence growth. European Journal of Agronomy 24, 19–25.Google Scholar
Staniforth, R.J. and Cavers, P.B. (1979) Field and laboratory germination responses of achenes of Polygonum lapathifolium, P. pensylvanicum and P. persicaria . Canadian Journal of Botany 57, 877–885.Google Scholar
Stoller, E.W. and Wax, L.M. (1993) Periodicity of germination and emergence of some annual weeds. Weed Science 21, 574–580.Google Scholar
Vleeshouwers, L.M. (1997) Modelling the effect of temperature, soil penetration resistance, burial depth and seed weight on pre-emergence growth of weeds. Annals of Botany 79, 553–563.Google Scholar