Cited by 887Crop Yield and Soil FertilityGenetics and Plant BreedingWheat and Barley Genetics and Pathology

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Wheat Yield Progress Associated with Higher Stomatal Conductance and Photosynthetic Rate, and Cooler Canopies

Fischer, R. A., Rees, D., Sayre, K. D., Lu, Z.‐M., Condon, A. G., Saavedra, A. Larque·1998·Crop Science

DOI 10.2135/cropsci1998.0011183x003800060011x

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Abstract

Grain yields of eight representative semidwarf spring wheat (Triticum aestivum L.) cultivars released in northwest Mexico between 1962 and 1988 have increased linearly across years as measured in this region during 6 yr under favorable management and irrigation. To understand the physiological basis of this progress and possibly assist future selection for grain yield, leaf traits were determined during 3 yr in the same study. Stomatal conductance (gs), maximum photosynthetic rate (A max, and canopy temperature depression (CTD), averaged over the 3 yr, were closely and positively correlated with progress in the 6‐yr mean yield. The correlation was greatest with gs (r = 0.94, P < 0.01). Compared with the overall yield increase of 27%, gs increased 63%, A max increased 23%, and canopies were 0.6°C cooler. Carbon‐13 isotope discrimination was also positively associated with yield progress (r = 0.71, P < 0.05), but other leaf traits such as flag leaf area, specific leaf weight, percentage N and greeness were not, nor was crop growth rate around anthesis. The causal basis of the leaf activity interrelationships is reasonably clear, with both increased intercellular CO 2 concentration and increased mesophyll activity contributing to the increase in A max. However, causal links to the yield progress, and the accompanying increase in kernels per square meter, are not clear. It is concluded that g s and CTD should be further investigated as potential indirect selection criteria for yield.

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Background
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“Stomata closure is another drought adaptation trait as it is the first response from plants sensing water stress and can be assessed in the short term by measuring gas exchange, canopy temperature (Fischer et al. 1998) and carbon isotope discrimination over a longer term (Condon et al. 2004).”
Background
Leaf photosynthesis traits and associations with biomass and drought tolerance in amphidiploid and ancestral wheat genotypes
Mahmood, Y. A., DeSilva, J., King, I. P., King, J., & Foulkes, J. M. (2023) · European Journal of Agronomy · doi:10.1016/j.eja.2023.126846 · Cited by 12
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“CT can thus be employed as a proxy for stomatal characteristics such as stomatal conductance, stomatal aperture, or leaf porosity, and indirectly, photosynthetic rate (Amani et al. 1996; Fischer et al. 1998; Jones 2004; Maes and Steppe 2012).”
Method
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“There is a strong relationship between stomatal conductance and canopy temperature, since stomatal conductance has a direct effect on transpirational cooling (Amani et al., 1996; Fischer et al., 1998).”
Background
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“Some field experiments have been carried out to evaluate the relationship between grain yield and D under well-watered conditions (Condon et al. 1987; Fischer et al. 1998; Voltas et al. 1999; Rebetzke et al. 2006).”
Background
BİTKİ ÖRTÜSÜ SERİNLİĞİ VE KLOROFİL MİKTARININ MAKARNALIK BUĞDAY ISLAHINDA KULLANIM OLANAKLARI
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Consideration of Crop Responses to Environment in Plant Breeding
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“(Fischer et al. 1998) also delineated similar findings about the relationship of gs with A and CTD.”
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Exploring the Drought Tolerant Quantitative Trait Loci in Spring Wheat
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“Genotypes with high yield stability index [18] and relative drought index [19] values are generally regarded as stable under stress and non-stress conditions.”
Background
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“For example, genetic variation for canopy temperature in runner beans and wheat is linked to maintaining stomatal conductance in water-limited environments (Fischer et al., 1998; Jones, 1999).”
Background
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“…for researchers in plant biology [5]. programs that are working on the improvement of crops have modiﬁed stomata phenotypes to increase the yield [6]. stomata easily get aﬀected by external environment conditions and their micromorpho-logical characteristics are often used for plant…”
Background
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“…et al., 1996; Blum 1996; Pinter et al., 1990; Fischer et al., 1998; Karimizadeh and Mohammadi, 2011; Karimizadeh et al., 2011; Karimizadeh et al., 2012; Mohammadi et al., 2012) and has been associated with yield increase among wheat (Triticum aestivum L.) cultivars at CIMMYT (Fischer et al., 1998).”
BackgroundMethodInfluential
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Celik, S., Madenoğlu, S., Sönmez, B., Avağ, K., Türker, U., Çaycı, G., Kütük, A. C., & Heng, L. (2018) · doi:10.3906/tar-1709-31 · Cited by 7
“According to some researchers such as Sternberg et al. (1986), Farquhar et al. (1988), Fischer et al. (1998), Barbour et al. (2000), and Ripullone et al. (2007), the oxygen isotope composition of the plant materials is a sign of the evaporation conditions caused by material situations;…”
Background
Increased water supply promotes photosynthesis, C/N ratio, and plantamajoside accumulation in the medicinal plant Plantago depressa Willd
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Kovár, M., Černý, I., & Ernst, D. (2016) · doi:10.1515/agri-2016-0004 · Cited by 7
Use of thermographic imaging to screen for drought-tolerant genotypes in Brachypodium distachyon
Ruiz, M., Quemada, M., García, R. M., Carrillo, J. M., & Benavente, E. (2016) · Crop and Pasture Science · doi:10.1071/cp15134 · Cited by 7
“For diverse crops including wheat, genotypes with greater capacity for leaf cooling and lower canopy temperature have been shown to have a higher yield in hot regions (Radin et al. 1994; Fischer et al. 1998; Costa et al. 2012).”
Background

Authors: Fischer, R. A., Rees, D., Sayre, K. D., Lu, Z. ‐., Condon, A. G., & Saavedra, A. L.
Affiliations: Australian Centre for International Agricultural Research (AU)
Natural Resources Institute (GB)
Centro Internacional de Mejoramiento de Maíz Y Trigo (MX)
University of California, Los Angeles (US)
Commonwealth Scientific and Industrial Research Organisation (AU)
Cologeio de Postgraduados, Centro de Botanica Montecillo Texcoco Edo de Mexico Mexico
Corresponding author: Fischer, R. A.
ORCID: Fischer, R. A.
Lu, Z.‐M.
Condon, A. G.
Venue: Crop Science
Publisher: Wiley
Published: 1998-11
Volume: 38
Issue: 6
Pages: 1467-1475
ISSN: 0011-183X (ISSN-L)
1435-0653
DOI: 10.2135/cropsci1998.0011183x003800060011x
OpenAlex: W2058467808
Cited by: 887
References: 0
Citations by year: 2026: 12 · 2025: 26 · 2024: 31 · 2023: 41 · 2022: 53 · 2021: 63 · 2020: 56 · 2019: 60 · 2018: 42 · 2017: 42 · 2016: 48 · 2015: 46 · 2014: 45 · 2013: 45 · 2012: 39
FWCI: 33.54
Type: journal article
Language: en
Open access: closed
Licence: onlinelibrary.wiley.com/termsAndConditions#vor (vor)
Locations: Crop Science (publishedVersion)
Topics: Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Crop Yield and Soil Fertility
Life Sciences › Agricultural and Biological Sciences › Plant Science › Genetics and Plant Breeding
Life Sciences › Agricultural and Biological Sciences › Plant Science › Wheat and Barley Genetics and Pathology
Keywords: stomatal conductance, photosynthetic rate, canopy temperature depression, carbon isotope discrimination, leaf traits, intercellular CO2 concentration, northwestern Mexico

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Wheat Yield Progress Associated with Higher Stomatal Conductance and Photosynthetic Rate, and Cooler Canopies

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