DOI: 10.1016/j.agrformet.2020.107954
论文题名: Grain yield, root growth habit and lodging of eight oilseed rape genotypes in response to a short period of heat stress during flowering
作者: Wu W. ; Shah F. ; Duncan R.W. ; Ma B.L.
刊名: Agricultural and Forest Meteorology
ISSN: 1681923
出版年: 2020
卷: 287 语种: 英语
英文关键词: Crop lodging
; Electrical capacitance
; High temperature
; Root morphology
Scopus关键词: agrometeorology
; biomechanics
; canola
; climate change
; fertility
; flowering
; genotype
; global climate
; heat shock
; root
; yield response
; Brassica napus
; Brassica napus var. napus
英文摘要: Increasing temperature due to global climate change is detrimental to both the growth and development of canola (Brassica napus L.) that ultimately leads to a disastrous reduction in productivity. Understanding how these increasing temperatures will impact canola growth in terms of root traits, seed yield and lodging resistance is urgently required to maximize production in the coming decades. A set of eight B. napus genotypes was evaluated under controlled environments with two temperature treatments: 23/17 °C as the optimum (control) and 27.0/24.3 °C mean day/night temperatures as the heat stress. Root traits were assessed using both destructive and non–destructive methods, such as electrical capacitance (EC) and electrical impedance (EI). Simulated root and stem lodging tests were conducted to determine the risk of root lodging and stem lodging, respectively. High temperature stress significantly suppressed root morphological traits, and reduced pod fertility by an average of 28% and seed yield by 34%, along with a reduction in EC (10%) and an increased EI (17%). A significant relationship of EC with root traits (R2=0.53–0.59⁎⁎) and seed yield (R2=0.29*) was also observed. The high temperature treatment reduced the stem bending strength by 7% and stem safety factor by 11%, while did not show a consistent impact on root anchorage strength and root safety factor. The present study suggests that the risk of both yield reductions due to lower fertilization success ratio and crop lodging especially stem lodging increases under short periods of high temperature stress. Furthermore, EC could be applied as a non–destructive technique for evaluating root morphology and genotypic differences in tolerance of canola plants to heat stress. © 2020 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158084
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Hainan Key Laboratory for Sustainable, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, Hainan 570228, China; Ottawa Research and Development Centre, Agriculture and Agri–Food Canada, 960 Carling Ave, Ottawa, ON K1A 0C6, Canada; Department of Plant Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
Recommended Citation:
Wu W.,Shah F.,Duncan R.W.,et al. Grain yield, root growth habit and lodging of eight oilseed rape genotypes in response to a short period of heat stress during flowering[J]. Agricultural and Forest Meteorology,2020-01-01,287