Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1017/S0960258518000363 |
Alleviation of morphophysiological dormancy in seeds of the Australian arid-zone endemic shrub, Hibbertia glaberrima F. Muell. (Dilleniaceae) | |
Dalziell, Emma L.1,2,3; Erickson, Todd E.1,2; Hidayati, Siti N.4; Walck, Jeffrey L.4; Merritt, David J.1,2 | |
通讯作者 | Dalziell, Emma L. |
来源期刊 | SEED SCIENCE RESEARCH
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ISSN | 0960-2585 |
EISSN | 1475-2735 |
出版年 | 2018 |
卷号 | 28期号:4页码:286-293 |
英文摘要 | Morphophysiological dormancy (MPD) is predominantly found in seeds of temperate regions and is uncommon in arid biomes. MPD has been reported in a number of Hibbertia (Dilleniaceae) species of temperate Australia, and in a single species of the arid zone, H. glaberrima. This study aimed to examine the dormancy and germination ecology of seeds of H. glaberrima. Seeds were subjected to temperature stratification treatments designed to mimic summer and autumn conditions in the Pilbara region of Western Australia. Seed germination and embryo growth were measured. We also tested the interaction between temperature stratification and cycles of drying and wetting designed to mimic sporadic rainfall events. All temperature and moisture treatments were tested in combination (+/-) with the smoke-derived chemical karrikinolide (KAR(1)). Exposing dormant seeds to temperatures suitable for warm stratification (35 degrees C) for >= 8 weeks, followed by incubation at 25 degrees C, resulted in significantly higher germination compared with non-stratified seeds. Exposing seeds to dry/wet cycling in conjunction with temperature stratification did not significantly increase germination. Exposure to KAR(1) increased germination under most conditions. Once seeds are shed during October to December, they are exposed to hot and sporadically wet conditions over summer, allowing MPD to be overcome in a proportion of the seed population. Seeds may germinate in autumn (March to April), in conjunction with cooler temperatures. More deeply dormant individuals may require more than one summer to overcome dormancy. Similar to other species occurring in fire-prone ecosystems, fire also plays a crucial role in the germination ecology of H. glaberrima. |
英文关键词 | dormancy classification dryland embryo growth germination karrikinolide rehabilitation restoration |
类型 | Article |
语种 | 英语 |
国家 | Australia ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000455656500005 |
WOS关键词 | CLASSIFICATION-SYSTEM ; GERMINATION ; SMOKE ; REHABILITATION |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
来源机构 | University of Western Australia |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/213141 |
作者单位 | 1.Kings Pk Sci, Dept Biodivers Conservat & Attract, Kings Pk, WA 6005, Australia; 2.Univ Western Australia, Sch Biol Sci, Crawley, WA 6009, Australia; 3.Curtin Univ, Sch Mol & Life Sci, Bentley, WA 6102, Australia; 4.Middle Tennessee State Univ, Dept Biol, Murfreesboro, TN 37132 USA |
推荐引用方式 GB/T 7714 | Dalziell, Emma L.,Erickson, Todd E.,Hidayati, Siti N.,et al. Alleviation of morphophysiological dormancy in seeds of the Australian arid-zone endemic shrub, Hibbertia glaberrima F. Muell. (Dilleniaceae)[J]. University of Western Australia,2018,28(4):286-293. |
APA | Dalziell, Emma L.,Erickson, Todd E.,Hidayati, Siti N.,Walck, Jeffrey L.,&Merritt, David J..(2018).Alleviation of morphophysiological dormancy in seeds of the Australian arid-zone endemic shrub, Hibbertia glaberrima F. Muell. (Dilleniaceae).SEED SCIENCE RESEARCH,28(4),286-293. |
MLA | Dalziell, Emma L.,et al."Alleviation of morphophysiological dormancy in seeds of the Australian arid-zone endemic shrub, Hibbertia glaberrima F. Muell. (Dilleniaceae)".SEED SCIENCE RESEARCH 28.4(2018):286-293. |
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