Interactive effects of high temperature and drought stress during stem elongation, anthesis and early grain filling on the yield formation and photosynthesis of winter wheat

2018 ◽  
Vol 221 ◽  
pp. 182-195 ◽  
Author(s):  
Marcela Hlaváčová ◽  
Karel Klem ◽  
Barbora Rapantová ◽  
Kateřina Novotná ◽  
Otmar Urban ◽  
...  
Keyword(s):  
High Temperature ◽  
Drought Stress ◽  
Winter Wheat ◽  
Stem Elongation ◽  
Grain Filling ◽  
Interactive Effects ◽  
Yield Formation

Winter wheat growth dynamics and their relationship with the field productivity using Sentinel-1 SAR polarimetry

2020 ◽  
Author(s):  
Nikolaos-Christos Vavlas ◽  
Toby Waine ◽  
Jeroen Meersmans ◽  
Goetz Richter
Keyword(s):  
Winter Wheat ◽  
Stem Elongation ◽  
Temporal Frequency ◽  
Growth Dynamics ◽  
Growth And Yield ◽  
Field Development ◽  
Surface Moisture ◽  
Sigmoid Curve ◽  
Final Yield ◽  
Yield Formation

<p>Synthetic Aperture Radar (SAR) is sensitive to the surface structure as well as dielectric properties, so can be used to quantify the canopy characteristics and surface moisture. High temporal frequency SAR backscatter data are useful in terms of quantifying crop phenological development, growth and yield formation. The aim of this research is to identify the growth dynamics of winter wheat from SAR at field scale, validated using farm sites with different productivity between two years (2018-2019). We identify and explore the parameters which characterize crop performance from SAR temporal curves and use these to improve and automate the monitoring of wheat fields. Our novel methodology includes the extraction of crop indicators using the VH/VV ratio temporal curve from Sentinel-1. Sigmoid curve fitting is used to simulate the VH/VV response and the extracted parameters are related to the field development. The results show that specific indicators, such as the duration of the high vegetation (stem elongation to dough development) as well as the timing of the booting stage of wheat significantly correlate with the final yield. Other indicators can provide information about the canopy characteristics of wheat (e.g. above ground biomass and plant water content). The combination of selected indicators can provide a more robust analysis of the fields. These results demonstrate the potential of SAR to remotely quantify yield without using any management data from the farm.</p>

scholarly journals Time of Fusarium inoculation and post-anthesis temperature stress affect FHB severity and DON concentration in winter wheat

2016 ◽  
Vol 6 (2) ◽  
pp. 953-962
Author(s):  
Victor Okereke ◽  
Hannah Jones ◽  
Mike Gooding
Keyword(s):  
High Temperature ◽  
Winter Wheat ◽  
Grain Filling ◽  
Controlled Environment ◽  
Near Isogenic Lines ◽  
Head Blight ◽  
Subsequent Increase ◽  
Wheat Grains ◽  
Isogenic Lines ◽  
Temperature Interaction

Two pot experiments were conducted using elite lines and near isogenic lines (NILs) of winter wheat in a controlled environment to evaluate the effect of time of inoculation and subsequent increase in temperature during grain-filling on Fusarium head blight (FHB) and deoxynivalenol (DON) on the infected wheat grains. The experiments were a complete factorial combination with randomised replicates. Fusarium graminearum was used to spray inoculate wheat spikes at glume loose (GL). GL was established when the lower glume could be opened with a thumbnail. Fusarium inoculation was done at glume loose (GL+0), 4 and 8 days after (GL+4 and GL+8), respectively. Pots transferred to controlled environment cabinets set at 23/15oC or 28/20oC. Results reveal that FHB severity showed a significant (P<0.05) cultivar and temperature interaction in both elite and near isogenic lines. High temperature increased FHB severity by 35% in the NILs. DON concentration showed cultivar sensitive in both sets of cultivars. Inoculation at GL+4 which corresponded with the mid-anthesis gave the highest FHB severity and DON concentration in NILs, while the elite cultivars showed cultivar sensitive to DON accumulation regardless of the time of Fusarium inoculation.

Effects of combined high temperature and drought stress on amylose and protein contents at rice grain-filling stage

2012 ◽  
Vol 20 (1) ◽  
pp. 40-47 ◽  
Author(s):  
Huan-Ye GAO ◽  
San-Gen WANG ◽  
Xue-Feng ZONG ◽  
Zhong-Hua TENG ◽  
Fang-Ming ZHAO ◽  
...  
Keyword(s):  
High Temperature ◽  
Drought Stress ◽  
Grain Filling ◽  
Rice Grain ◽  
Filling Stage ◽  
Grain Filling Stage

scholarly journals Influence of Take-All Epidemics on Winter Wheat Yield Formation and Yield Loss

2001 ◽  
Vol 91 (7) ◽  
pp. 694-701 ◽  
Author(s):  
Alexandra Schoeny ◽  
Marie-Hélène Jeuffroy ◽  
Philippe Lucas
Keyword(s):  
Winter Wheat ◽  
Yield Components ◽  
Stem Elongation ◽  
Disease Incidence ◽  
Wheat Yield ◽  
Economic Benefits ◽  
Winter Wheat Yield ◽  
Yield Formation ◽  
The Impact ◽  
Take All

The effects of take-all epidemics on winter wheat yield formation were determined, and disease-yield relationships were established to assess the agronomic efficacy and economic benefits of control methods. Epidemics were generated in naturally infested fields by varying cropping season, crop order in the rotation, and experimental fungicide seed treatment. Disease incidence and severity were assessed from tillering to flowering. Yield components were measured at harvest. Models simulating the formation of the yield components in the absence of limiting factors were used to estimate the losses caused by take-all. Losses were predicted by the disease level at a specific time or the area under the disease progress curve, reflecting accumulation during a specific period. Losses of grain number per square meter and 1,000-grain weight were linked to cumulative disease incidence between the beginning of stem elongation and flowering, and disease incidence at midstem elongation, respectively. Yield losses were accounted for by both cumulative disease incidence between sowing and flowering, and disease incidence at midstem elongation. Results confirm the importance of nitrogen fertilization in reducing the impact of take-all on wheat.

Effects of high temperature during anthesis and grain filling on physiological characteristics of winter wheat cultivars

2021 ◽  
Author(s):  
Milan Mirosavljević ◽  
Sanja Mikić ◽  
Vesna Župunski ◽  
Ankica Kondić Špika ◽  
Dragana Trkulja ◽  
...  
Keyword(s):  
High Temperature ◽  
Winter Wheat ◽  
Grain Filling ◽  
Physiological Characteristics ◽  
Wheat Cultivars ◽  
Winter Wheat Cultivars

The Influence of Recovery Treatment on the Effects of a Brief Heat Shock on Wheat. II. Fractional Protein Accumulation During Grain Growth

1996 ◽  
Vol 23 (5) ◽  
pp. 605 ◽  
Author(s):  
PJ Stone ◽  
ME Nicolas ◽  
IF Wardlaw
Keyword(s):  
High Temperature ◽  
Grain Growth ◽  
High Performance ◽  
Protein Composition ◽  
Grain Filling ◽  
Interactive Effects ◽  
Size Exclusion ◽  
Protein Accumulation ◽  
Temperature Regimes ◽  
Very High

In this study, we have sought to identify the nature of the response to both moderately high (25-32�C) and very high (>32�C) temperatures by examining their interactive effects on the accumulation of functionally important proteins during grain-filling. In particular, we wished to determine if the deleterious effects of very high temperature could be alleviated by subsequently cool conditions. To this end, wheat cv. Oxley was exposed to either 21/16 or 40/16�C (day/night) from 15 to 19 days after anthesis and subsequently grown under one of three temperature regimes until maturity: 21/16 (control), 27/22 or 30/25�C. Grain samples were taken throughout grain growth and analysed for protein content and composition. Wheat proteins were separated and quantified as albumin,globulin, monomer, SDS-soluble polymer and SDS-insoluble polymer using size-exclusion high-performance liquid chromatography. The various protein fractions responded differentially and usually additively to moderately high and very high temperatures during grain-filling. Cool post-shock conditions did not alleviate the effects of very high temperature on grain protein composition. Heat treatments reduced polymer:monomer ratio because the accumulation of monomer was reduced less than that of polymer.

Sign in / Sign up

Export Citation Format

Share Document