globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.14302
Scopus记录号: 2-s2.0-85051563128
论文题名:
Satellite sun-induced chlorophyll fluorescence detects early response of winter wheat to heat stress in the Indian Indo-Gangetic Plains
作者: Song L.; Guanter L.; Guan K.; You L.; Huete A.; Ju W.; Zhang Y.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期:9
起始页码: 4023
结束页码: 4037
语种: 英语
英文关键词: crop yield ; extreme climatic events ; heat stress ; sun-induced chlorophyll fluorescence ; winter wheat
Scopus关键词: Triticum aestivum
英文摘要: Extremely high temperatures represent one of the most severe abiotic stresses limiting crop productivity. However, understanding crop responses to heat stress is still limited considering the increases in both the frequency and severity of heat wave events under climate change. This limited understanding is partly due to the lack of studies or tools for the timely and accurate monitoring of crop responses to extreme heat over broad spatial scales. In this work, we use novel spaceborne data of sun-induced chlorophyll fluorescence (SIF), which is a new proxy for photosynthetic activity, along with traditional vegetation indices (Normalized Difference Vegetation Index NDVI and Enhanced Vegetation Index EVI) to investigate the impacts of heat stress on winter wheat in northwestern India, one of the world's major wheat production areas. In 2010, an abrupt rise in temperature that began in March adversely affected the productivity of wheat and caused yield losses of 6% compared to previous year. The yield predicted by satellite observations of SIF decreased by approximately 13.9%, compared to the 1.2% and 0.4% changes in NDVI and EVI, respectively. During early stage of this heat wave event in early March 2010, the SIF observations showed a significant reduction and earlier response, while NDVI and EVI showed no changes and could not capture the heat stress until late March. The spatial patterns of SIF anomalies closely tracked the temporal evolution of the heat stress over the study area. Furthermore, our results show that SIF can provide large-scale, physiology-related wheat stress response as indicated by the larger reduction in fluorescence yield (SIFyield) than fraction of photosynthetically active radiation during the grain-filling phase, which may have eventually led to the reduction in wheat yield in 2010. This study implies that satellite observations of SIF have great potential to detect heat stress conditions in wheat in a timely manner and assess their impacts on wheat yields at large scales. © 2018 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110270
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: International Institute for Earth System Sciences, Nanjing University, Nanjing, China; Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China; Helmholtz Center Potsdam, Remote Sensing Section, GFZ German Research Center for Geosciences, Potsdam, Germany; Department of Natural Resources and Environmental Sciences and National Center for Supercomputing Applications, University of Illinois at Urbana Champaign, Urbana, IL, United States; Macro Agriculture Research Institute, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, China; International Food Policy Research Institute, Washington, DC, United States; Plant Functional Biology and Climate Change Cluster, University of Technology Sydney, Haymarket, NSW, Australia

Recommended Citation:
Song L.,Guanter L.,Guan K.,et al. Satellite sun-induced chlorophyll fluorescence detects early response of winter wheat to heat stress in the Indian Indo-Gangetic Plains[J]. Global Change Biology,2018-01-01,24(9)
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