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Effect of temperature and moist conditions on seed dormancy cycling of two sympatric limestone species, Begonia guishanensis and Paraisometrum mileense, in southern China

Published online by Cambridge University Press:  14 April 2020

Xiao-Jian Hu Open the ORCID record for Xiao-Jian Hu [Opens in a new window] ,
Cheng Liu ,
Ai-Rong Li ,
Xiang-Yun Yang  and
Carol Baskin
Xiao-Jian Hu
Affiliation:
The Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan650201, China
Cheng Liu
Affiliation:
The Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan650201, China
Ai-Rong Li
Affiliation:
Department of Economic Plants and Biotechnology, Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming650201, China
Xiang-Yun Yang*
Affiliation:
The Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan650201, China
Carol Baskin
Affiliation:
Department of Biology, University of Kentucky, Lexington, KY40546, USA Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY40546, USA
*
Author for correspondence: Xiang-Yun Yang, E-mail: [email protected]
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Abstract

Information about seed dormancy cycling and germination in relation to temperature and moisture conditions in the natural environment is important for the conservation and restoration of rare species, including Begonia guishanensis and Paraisometrum mileense, two sympatric perennial limestone (karst) species. Dry afterripening (DAR) and wet and dry (WD) cycles at 15/5 and 25/15°C as well as moist chilling (MC) at 15/5°C were used to mimic the natural environment at different times of the year. A field experiment was conducted to monitor seasonal changes in germination responses of the seeds. About 40–65% of B. guishanensis and 5% of P. mileense seeds were dormant at maturity. DAR at 25/15 and 15/5°C as well as MC and WD cycles at 15/5°C alleviated dormancy for B. guishanensis but not P. mileense, and WD cycles at 25/15°C induced a deeper conditional dormancy for both species. Seeds of B. guishanensis exhibited dormancy cycling in the field, with increased dormancy under natural WD cycles at relatively high temperatures during the transition from the dry to the wet season in April to May and decreased dormancy during the wet season from June to October. KNO3 mitigated the dormancy-inducing effect of both artificial and natural WD cycles at relatively high temperatures for B. guishanensis. The field experiment indicated that seeds of B. guishanensis may be able to form a persistent soil seed bank, while almost all seeds of P. mileense germinate at the beginning of the wet season in the field.

Keywords

Begonia guishanensiscold stratificationdry afterripeningendemic speciesnitrateParaisometrum mileense seed dormancy cyclingwet and dry cycles
Type
Research Paper
Information
Seed Science Research , Volume 30 , Issue 1 , March 2020 , pp. 29 - 36
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Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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References

Allen, P, White, D and Markhart, A (1993) Germination of perennial ryegrass and annual bluegrass seeds subjected to hydration–dehydration cycles. Crop Science 33, 1020–1025.CrossRefGoogle Scholar
Baskin, J and Baskin, C (1980) Ecophysiology of secondary dormancy in seeds of Ambrosia artemisiifolia. Ecology 61, 475–480.CrossRefGoogle Scholar
Baskin, J and Baskin, C (1983) Seasonal changes in the germination responses of buried seeds of Arabidopsis thaliana and ecological interpretation. Botanical Gazette 144, 540–543.CrossRefGoogle Scholar
Baskin, C and Baskin, J (2014) Seeds: ecology, biogeography, and evolution of dormancy and germination (2nd ed). San Diego, CA, Elsevier/Academic Press.Google Scholar
Bauer, MC, Meyer, SE and Allen, PS (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
Bazin, J, Batlla, D, Dussert, S, El-Maarouf-Bouteau, H and Bailly, C (2010) Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening. Journal of Experimental Botany 62, 627–640.CrossRefGoogle ScholarPubMed
Bradford, KJ, Steiner, JJ and Trawatha, SE (1990) Seed priming influence on germination and emergence of pepper seed lots. Crop Science 30, 718–721.CrossRefGoogle Scholar
Cao, D, Baskin, CC, Baskin, JM, Yang, F and Huang, Z (2013) Dormancy cycling and persistence of seeds in soil of a cold desert halophyte shrub. Annals of Botany 113, 171–179.CrossRefGoogle ScholarPubMed
Chen, W-H, Shui, Y-M, Yang, J-B, Wang, H, Nishii, K, Wen, F, Zhang, Z-R and Möller, M (2014) Taxonomic status, phylogenetic affinities and genetic diversity of a presumed extinct genus, Paraisometrum WT Wang (Gesneriaceae) from the karst regions of Southwest China. PLoS One 9, e107967.CrossRefGoogle Scholar
Chin, SC (1977) Limestone Hill flora of Malaya. I. Gardens’ Bulletin Singapore 30, 165–219.Google Scholar
Fenner, M and Thompson, K (2005) The ecology of seeds. Cambridge, Cambridge University Press.CrossRefGoogle Scholar
Finch-Savage, WE and Leubner-Metzger, G (2006) Seed dormancy and the control of germination. New Phytologist 171, 501–523.CrossRefGoogle ScholarPubMed
Hoyle, GL, Daws, MI, Steadman, KJ and Adkins, SW (2008) Mimicking a semi-arid tropical environment achieves dormancy alleviation for seeds of Australian native Goodeniaceae and Asteraceae. Annals of Botany 101, 701–708.CrossRefGoogle ScholarPubMed
Hu, XJ, Yang, LH and Guan, KY (2012) Physiological dormancy in seeds of two endemic species of Begonia from Yunnan Province, China: diagnosis and classification. Plant Species Biology 27, 201–209.CrossRefGoogle Scholar
Huang, S and Shui, Y (1994) New taxa of Begonia from Yunnan. Acta Botanica Yunnanica 16, 333–342.Google Scholar
Imaichi, R, Nagumo, S and Kato, M (2000) Ontogenetic anatomy of Streptocarpus grandis (Gesneriaceae) with implications for evolution of monophylly. Annals of Botany 86, 37–46.CrossRefGoogle Scholar
Kastner, WW Jr, Goebel, CJ and Maguire, JD (1981) Effects of a wet-dry seed treatment on the germination and root elongation of “Whitmar” beardless wheatgrass under various water potentials. Journal of Range Management 34, 305–307.CrossRefGoogle Scholar
Li, A, Wang, D, Yu, B, Yu, X and Li, W (2014) Maintenance or collapse: responses of extraplastidic membrane lipid composition to desiccation in the resurrection plant Paraisometrum mileense. PLoS One 9, e103430.CrossRefGoogle ScholarPubMed
Lima, A and Meiado, M (2018) Effect of hydration and dehydration cycles on Mimosa tenuiflora seeds during germination and initial development. South African Journal of Botany 116, 164–167.CrossRefGoogle Scholar
Liu, C, Qin, SF and Hu, XJ (2015) Dormancy and germination of Paraisometrum mileense and their ecological implications. Plant Diversity and Resources 37, 278–282.Google Scholar
Ma, H, Li, HZ and Guan, KY (2005) Study on characters of seed germination of four species of Begonia from China. Seed 24, 10–13.Google Scholar
Ma, Y, Chen, G, Grumbine, RE, Dao, Z, Sun, W and Guo, H (2013) Conserving plant species with extremely small populations (PSESP) in China. Biodiversity and Conservation 22, 803–809.CrossRefGoogle Scholar
McDonald, MB and Kwong, FY (2005) Flower seeds: biology and technology. Oxfordshire, UK, CABI Publishing.CrossRefGoogle Scholar
Meyer, SE, Debaene-Gill, SB and Allen, PS (2000) Using hydrothermal time concepts to model seed germination response to temperature, dormancy loss, and priming effects in Elymus elymoides. Seed Science Research 10, 213–223.CrossRefGoogle Scholar
Ren, YQ and Guan, KY (2008) Effects of moist-chilling and GA3 applications on seed germination of three Pedicularis species from Yunnan, China. Seed Science and Technology 36, 225–229.CrossRefGoogle Scholar
Ren, J and Tao, L (2003) Effect of hydration–dehydration cycles on germination of seven Calligonum species. Journal of Arid Environments 55, 111–122.CrossRefGoogle Scholar
Santini, BA, Rojas-Aréchiga, M and Morales, EG (2017) Priming effect on seed germination: Is it always positive for cacti species? Journal of Arid Environments 147, 155–158.CrossRefGoogle Scholar
Shimizu, T (1963) Studies on the limestone flora of Japan and Taiwan II. Journal of the Faculty of Textile Science and Technology Shinshu University 12, 1–85.Google Scholar
Tebbitt, MC and Garden, BB (2005) Begonias: cultivation, identification, and natural history. Porland, Timber Press.Google Scholar
Tong, X, Brandt, M, Yue, Y, Horion, S, Wang, K, Keersmaecker, WD, Feng, T, Schurgers, G, Xiao, X and Luo, Y (2018) Increased vegetation growth and carbon stock in China karst via ecological engineering. Nature Sustainability 1, 44–50.CrossRefGoogle Scholar
Weitzmann, AL, Skog, LE, Wang, WT, Pan, KY and Li, ZY (1997) New taxa, new combinations, and notes on Chinese Gesneriaceae. Novon 7, 423–435.CrossRefGoogle Scholar
Yang, Z, Chen, W-H and Shui, Y-M (2015) Seed micromorphology and its taxonomic significance of Begonia (Begoniaceae) in China and Vietnam. Plant Diversity and Resources 37, 376–388.Google Scholar
Zhu, H (2007) The karst ecosystem of southern China and its biodiversity. Tropical Forestry 35, 44–47.Google Scholar
Zhu, H, Wang, H, Li, B and Sirirugsa, P (2003) Biogeography and floristic affinities of the limestone flora in southern Yunnan, China. Annals of the Missouri Botanical Garden 90, 444–465.CrossRefGoogle Scholar