語言:

Germination responses to water potential in Bromus sterilis L. under different temperatures and light regimes

VALIČKOVÁ, Veronika ; HAMOUZOVÁ, Kateřina ; KOLÁŘOVÁ, Michaela ; SOUKUP, Josef

Plant, soil and environment, 2017-01, Vol.63 (8), p.368-374 [同儕審閱期刊]

可取得全文

引用被引用

傳送到

題名:
Germination responses to water potential in Bromus sterilis L. under different temperatures and light regimes
著者: VALIČKOVÁ, Veronika ; HAMOUZOVÁ, Kateřina ; KOLÁŘOVÁ, Michaela ; SOUKUP, Josef
主題: Bromus sterilis ; Cereals ; Darkness ; Germination ; hydrothermal time ; Light ; Prediction models ; seed ecology ; Seeds ; Temperature ; Water availability ; Water potential ; water stress ; Weed control ; weedy grass ; Wilting ; Wilting point
所屬期刊: Plant, soil and environment, 2017-01, Vol.63 (8), p.368-374
描述: Barren brome (Bromus sterilis L.) is a troublesome weed of winter cereals in western and central Europe and its control requires an exact estimation of emergence time. The study focused on the germination response of populations from the Czech Republic to water availability at different temperatures and under different light regimes. Seeds were able to germinate even at very low water potential (Ψ) close to the wilting point, but decreasing temperatures below 25°C and exposure to light decreased the germination percentage (GP) and prolonged the time to reach 50% germination (T50). At higher temperatures of 15, 20, and 25°C, seeds germinated up to a Ψ value of?–1.5 MPa; however, the GP differed between light (0–3%) and darkness (50–75%). At the highest temperature of 25°C and germination in water, T50 was less than 1 day, but a decrease in Ψ to –1.5 MPa prolonged the T50 to5 days; however, this occurred without any significant effect of light regime. With decreasing temperature and Ψ, seeds were more sensitive to the light regime and the disproportion between T50 in light and darkness increased. At a Ψ of less than –1.0 MPa, seeds needed twice as long for germination in light than in darkness when germinating at 20°C or 15°C. The results may be of value for the development of predictive models and for identifying times when weed control may be the most effective.
出版者: Prague: Czech Academy of Agricultural Sciences (CAAS)
語言: 英文;捷克文
識別號: ISSN: 1214-1178
EISSN: 1805-9368
DOI: 10.17221/406/2017-PSE
資源來源: Publicly Available Content Database
Agricultural & Environmental Science Collection
DOAJ Directory of Open Access Journals

返回到檢索清單

Germination responses to water potential in Bromus sterilis L. under different temperatures and light regimes

VALIČKOVÁ, Veronika ; HAMOUZOVÁ, Kateřina ; KOLÁŘOVÁ, Michaela ; SOUKUP, Josef

正在檢索遠程資料庫，請稍等