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Version 3.24
Publication Type J
Authors Yang, F., J. M. Baskin, C. C. Baskin, X. J. Yang, D. C. Cao and Z. Y. Huang
Title Effects of germination time on seed morph ratio in a seed-dimorphic species and possible ecological significance
Source Annals of Botany
Author Keywords Germination timing life history traits maternal environmental effect phenology phenotypic plasticity seed germination seed heteromorphism Suaeda corniculata LIFE-HISTORY CHARACTERS ARABIDOPSIS-THALIANA PHENOTYPIC PLASTICITY EVOLUTIONARY ECOLOGY ATRIPLEX-SAGITTATA NATURAL-SELECTION HETEROMORPHISM GROWTH CHENOPODIACEAE REPRODUCTION
Abstract Background and Aims Diaspores of heteromorphic species may germinate at different times due to distinct dormancy-breaking and germination requirements, and this difference can influence life history traits. The primary aim of this study was to determine the effect of germination time of the two seed morphs of Suaeda corniculata subsp. mongolica on life history traits of the offspring. Methods Germinated brown and black seeds were sown on the 20th of each month from April to September in a simulated but near-natural habitat of the species. Phenological and vegetative traits of the maternal plants, and number, size and germination percentage of the offspring were determined. Key Results Germinated seeds sown late in the year produced smaller plants that had a higher proportion of non-dormant brown than dormant black seeds, and these brown seeds were larger than those produced by germinated seeds sown early in the year. The length of the seedling stage for brown seeds was shorter than that for black seeds, and the root/shoot ratio and reproductive allocation of plants from brown seeds were more variable than they were for plants from black seeds. Late-germinating brown seeds produced larger plants than late-germinating black seeds. Conclusions Altering the proportion of the two seed types in response to germination timing can help alleviate the adverse effects of delayed germination. The flexible strategy of a species, such as S. corniculata, that produces different proportions of dimorphic seeds in response to variation in germination timing may favour the maintenance and regeneration of the population in its unpredictable environment.
Author Address [Yang, Fan; Yang, Xuejun; Cao, Dechang; Huang, Zhenying] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China. [Yang, Fan] Univ Chinese Acad Sci, Beijing 100039, Peoples R China. [Baskin, Jerry M.; Baskin, Carol C.] Univ Kentucky, Dept Biol, Lexington, KY 40546 USA. [Baskin, Carol C.] Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA. Huang, ZY (reprint author), Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China. zhenying@ibcas.ac.cn
ISSN 0305-7364
ISBN 0305-7364
29-Character Source Abbreviation Ann. Bot.
Publication Date Jan
Year Published 2015
Volume 115
Issue 1
Beginning Page 137-145
Digital Object Identifier (DOI) 10.1093/aob/mcu210
Unique Article Identifier WOS:000347416100012
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