NEIGAE OpenIR  > 湿地生态系统管理学科组
Seed dormancy regulates germination response to smoke and temperature in a rhizomatous evergreen perennial
H. Y. Ma, T. E. Erickson and D. J. Merritt
2018
Source PublicationAob Plants
Volume10Issue:4
Other AbstractSeed dormancy status regulates the response of seeds to environmental cues that can trigger germination. Anigozanthos flavidus (Haemodoraceae) produces seeds with morphophysiological dormancy (MPD) that are known to germinate in response to smoke, but embryo growth dynamics and germination traits in response to temperatures and after-ripening have not been well characterized. Seeds of A. flavidus, after-ripened for 28 months at 15 degrees C/15 % relative humidity, were incubated on water agar, water agar containing 1 mu M karrikinolide (KAR(1)) or 50 mu M glyceronitrile at 5, 10, 15, 20, 25, 20/10 and 25/15 degrees C for 28 days. After incubation at 5, 10 and 25 degrees C for 28 days, seeds were transferred to 15 degrees C for another 28 days. Embryo growth dynamics were tested at 5, 10, 15 and 25 degrees C. Results demonstrated that fresh seeds of A. flavidus had MPD and the physiological dormancy (PD) component could be broken by either glyceronitrile or dry after-ripening. After-ripened seeds germinated to >= 80 % at 15-20 degrees C while no additional benefit of germination was observed in the presence of the KAR(1) or glyceronitrile. Embryo length significantly increased at 10 degrees C, and only slightly increased at 5 degrees C, while growth did not occur at 25 degrees C. When un-germinated seeds were moved from 5-10 degrees C to 15 degrees C for a further 28 days, germination increased from 0 to >80 % in significantly less time indicating that cold stratification may play a key role in the germination process during winter and early spring in A. flavidus. The lower germination (<50 %) of seeds moved from 25 to 15 degrees C was produced by the induction of secondary dormancy. Induction of secondary dormancy in seeds exposed to warm stratification, a first report for Anigozanthos species, suggests that cycling of PD may be an important mechanism of controlling germination timing in the field.
Document Type期刊论文
Identifierhttp://ir.iga.ac.cn/handle/131322/9248
Collection湿地生态系统管理学科组
Recommended Citation
GB/T 7714
H. Y. Ma, T. E. Erickson and D. J. Merritt. Seed dormancy regulates germination response to smoke and temperature in a rhizomatous evergreen perennial[J]. Aob Plants,2018,10(4).
APA H. Y. Ma, T. E. Erickson and D. J. Merritt.(2018).Seed dormancy regulates germination response to smoke and temperature in a rhizomatous evergreen perennial.Aob Plants,10(4).
MLA H. Y. Ma, T. E. Erickson and D. J. Merritt."Seed dormancy regulates germination response to smoke and temperature in a rhizomatous evergreen perennial".Aob Plants 10.4(2018).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[H. Y. Ma, T. E. Erickson and D. J. Merritt]'s Articles
Baidu academic
Similar articles in Baidu academic
[H. Y. Ma, T. E. Erickson and D. J. Merritt]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[H. Y. Ma, T. E. Erickson and D. J. Merritt]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.