globalchange  > 过去全球变化的重建
DOI: 10.1111/plb.12885
WOS记录号: WOS:000465088600007
论文题名:
Optimising seed processing techniques to improve germination and sowability of native grasses for ecological restoration
作者: Pedrini, S.1,2; Lewandrowski, W.2,3; Stevens, J. C.2,3; Dixon, K. W.1,3
通讯作者: Pedrini, S.
刊名: PLANT BIOLOGY
ISSN: 1435-8603
EISSN: 1438-8677
出版年: 2019
卷: 21, 期:3, 页码:415-424
语种: 英语
英文关键词: Acid digestion ; flaming ; germination ; grassland ; native seed ; Poaceae ; seed enablement ; seed technology
WOS关键词: GRASSLAND ; RECRUITMENT ; DORMANCY ; ACID ; LIFE
WOS学科分类: Plant Sciences
WOS研究方向: Plant Sciences
英文摘要:

Grasslands across the globe are undergoing expansive degradation due to human impacts and climate change. If restoration of degraded native grassland is to be achieved at the scale now required, cost-effective means for seed-based establishment of grass species is crucial. However, grass seeds present numerous challenges associated with handling and germination performance that must be overcome to improve the efficiency of seeding. Previous research has demonstrated that complete removal of the palea and lemma (husk) maximises germination performance, hence we investigated the effects of complete husk removal on seed handling and germination of four temperate Australian grass species. Three techniques were tested to remove the husk - manual cleaning, flaming or acid digestion (the latter two followed by a manual cleaning step); these techniques were refined and adapted to the selected species, and germination responses were compared. The complete removal of the husk improved seed handling and sowability for all species. Germination was improved in Microlaena stipoides by 19% and in Rytidosperma geniculatum by 11%. Of the husk removal methods tested, flaming was detrimental to seed germination and fatal for one species (R. geniculatum). Compared to manual cleaning, sulphuric acid improved the overall efficacy of the cleaning procedure and increased germination speed (T50) in Austrostipa scabra, Chloris truncata and M. stipoides, and improved final germination in R. geniculatum by 13%. The seed processing methods developed and tested in the present study can be applied to grass species that present similar handling and germination performance impediments. These and other technological developments (seed coating and precision sowing) will facilitate more efficient grassland restoration at large scale.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/138014
Appears in Collections:过去全球变化的重建

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作者单位: 1.Curtin Univ, Dept Environm & Agr, Kent St, Bentley, WA 6102, Australia
2.Kings Pk & Bot Gardens, Kings Pk, WA, Australia
3.Univ Western Australia, Sch Biol Sci, Crawley, WA, Australia

Recommended Citation:
Pedrini, S.,Lewandrowski, W.,Stevens, J. C.,et al. Optimising seed processing techniques to improve germination and sowability of native grasses for ecological restoration[J]. PLANT BIOLOGY,2019-01-01,21(3):415-424
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