Access the full text.
Sign up today, get DeepDyve free for 14 days.
R. K. Abo, B. J. Merkel (2015)
Comparative estimation of the potential groundwater recharge in Al Zerba catchment of Aleppo basin, Syria, 8
J. L. Araus, H. R. Brown, A. Febrero, J. Bort, M. D. Serret (1993)
Ear photosynthesis, carbon isotope discrimination and the contribution of respiratory CO2 to differences in grain mass in durum wheat, 16
M. C. Cox, C. O. Qualset, D. W. Rains (1986)
Genetic variation for nitrogen assimilation and translocation in wheat. III. Nitrogen translocation in relation to grain yield and protein, 26
J. R. Evans (2013)
Improving photosynthesis, 162
J. T. Baker, D. C. Gitz, P. Payton, D. F. Wanjura, D. R. Upchurch (2007)
Using leaf gas exchange to quantify drought in cotton irrigated based on canopy temperature measurements, 99
A. Blum (1998)
Improving wheat grain filling under stress by stem reserve mobilisation, 100
R. D. Jackson, S. B. Idso, R. J. Reginato, P. J. Pinter (1981)
Canopy temperature as a crop water stress indicator, 17
S. S. Dhanda, G. S. Sethi, R. K. Behl (2004)
Indices of drought tolerance in wheat genotypes at early stages of plant growth, 190
L. Borrás, G. A. Slafer, M. E. Otegui (2004)
Seed dry weight response to source–sink manipulations in wheat, maize and soybean: A quantitative reappraisal, 86
T. Gebbing, H. Schnyder (2001)
13C labelling kinetics of sucrose in glumes indicates significant refixation of respiratory CO2 in the wheat ear, 28
(2021)
FAOSTAT
D. M. Gates (1968)
Transpiration and leaf temperature, 19
J. M. Costa, O. M. Grant, M. M. Chaves (2013)
Thermography to explore plant–environment interactions, 64
J. A. Cruz‐Aguado, R. Rodés, I. P. Pérez, M. Dorado (2000)
Morphological characteristics and yield components associated with accumulation and loss of dry mass in the internodes of wheat, 66
L. T. Evans, J. Bingham, P. Jackson, J. Sutherland (1972)
Effect of awns and drought on the supply of photosynthate and its distribution within wheat ears, 70
H. Abbad, S. El Jaafari, J. Bort, J. L. Araus (2004)
Comparative relationship of the flag leaf and the ear photosynthesis with the biomass and grain yield of durum wheat under a range of water conditions and different genotypes, 24
S. F. Blade, R. J. Baker (1991)
Kernel weight response to source‐sink changes in spring wheat, 31
A. Blum (1985)
Photosynthesis and transpiration in leaves and ears of wheat and barley varieties, 36
N. K. Gontia, K. N. Tiwari (2008)
Development of crop water stress index of wheat crop for scheduling irrigation using infrared thermometry, 95
I. Arduini, A. Masoni, L. Ercoli, M. Mariotti (2006)
Grain yield, and dry matter and nitrogen accumulation and remobilization in durum wheat as affected by variety and seeding rate, 25
T. Horie, S. Matsuura, T. Takai, K. Kuwasaki, A. Ohsumi, T. Shiraiwa (2006)
Genotypic difference in canopy diffusive conductance measured by a new remote‐sensing method and its association with the difference in rice yield potential, 29
A. Blum (2009)
Effective use of water (EUW) and not water‐use efficiency (WUE) is the target of crop yield improvement under drought stress, 112
K. C. DeJonge, S. Taghvaeian, T. J. Trout, L. H. Comas (2015)
Comparison of canopy temperature‐based water stress indices for maize, 156
It is important to explore and propose a potential source for further improvements in drought tolerance in spring wheat (Triticum aestivum L.). The present study aimed to evaluate the significance of ear as a post‐anthesis carbon source under drought conditions in wheat genotypes with different sink–source balances. Field trials were conducted in 2017 and 2018 for four spring wheat genotypes (T. aestivum L.) with different sink–source balances in two different soil water conditions, irrigated and drought. The relative importance of a post‐anthesis carbon gain and dry matter remobilization as source functions for grain filling was evaluated in both environments. Digital infrared thermal imagery analysis was undertaken to analyse the contribution of the photosynthetic source to the leaf canopy and ear parts. In irrigated conditions, carbon assimilation was the major source for grain filling in all genotypes, whereas the contribution of dry matter remobilization was up to 20%. This was supported by a larger leaf area index (LAI) with a lower canopy temperature as the soil water stress alleviated. The ear temperature was always maintained below the canopy temperature, irrespective of irrigation treatment. When the drought intensity became more severe, very small leaf area was insufficient as the photosynthetic source organ for grain filling. Under severe drought condition, especially for genotypes with a larger sink capacity, carbon supply from ear itself appeared to play a significant role in grain filling. This study suggested that enhancing ear photosynthesis could be potential target for improving drought tolerance for high‐yielding modern wheat genotypes with larger sink and smaller biomass.
Journal of Agronomy and Crop Science – Wiley
Published: Dec 1, 2021
Keywords: ear photosynthesis; infrared thermal imagery; remobilization
Read and print from thousands of top scholarly journals.
Already have an account? Log in
Bookmark this article. You can see your Bookmarks on your DeepDyve Library.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Copy and paste the desired citation format or use the link below to download a file formatted for EndNote
Access the full text.
Sign up today, get DeepDyve free for 14 days.
All DeepDyve websites use cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser.