Effects of elevated atmospheric CO2 and drought stress on individual grain filling rates and durations of the main stem in spring wheat

Li, Aiguo; Hou, Yuesheng; Trent, Anthony

doi:10.1016/s0168-1923(00)00221-5

Cited by 29 publications

(13 citation statements)

References 22 publications

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“…2) which is in agreement with some previous studies (Högy and Fangmeier, 2008;Li et al, 2001). However, others reported no changes (Kimball et al, 2001) or even decrease (Högy et al, 2009).…”

Section: Grain Physical Quality Parameterssupporting

confidence: 92%

“…For wheat, several aspects of grain quality have been found to change under e[CO 2 ] including grain physical, nutritional and baking quality traits. For thousand grain weight (TGW), some reports have shown increases (Högy and Fangmeier, 2008;Li et al, 2001), no change (Kimball et al, 2001) or a reduction (Högy et al, 2009) under e [CO 2 ]. More uniformly, grain protein concentration reportedly decreased under e[CO 2 ] (Fernando et al, 2012;Högy et al, 2009;Taub et al, 2008) and protein quality was shown to change (Högy et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Wheat grain quality under increasing atmospheric CO2 concentrations in a semi-arid cropping system

Fernando

Panozzo²,

Tausz

et al. 2012

Journal of Cereal Science

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Section: Grain Physical Quality Parameterssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Wheat grain quality under increasing atmospheric CO2 concentrations in a semi-arid cropping system

Fernando

Panozzo²,

Tausz

et al. 2012

Journal of Cereal Science

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“…In fact, grain filling rate is more important than its duration for individual grain weight, and more responsive to the increased assimilate availability through stay-green. This responsiveness has also been seen under the stressed conditions such as heat, drought and elevated CO 2 that lead to faster but shorter grain filling (Li et al, 2001;Yang et al, 2004;Zahedi and Jenner, 2003 (Zhang et al, 2014).…”

Section: Qtl Coincidences Reflect the Physiological Relationships Betmentioning

confidence: 75%

Early anthesis and delayed but fast leaf senescence contribute to individual grain dry matter and water accumulation in wheat

Xie

Mayes

Sparkes

2016

Field Crops Research

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Abbreviations: chl, chlorophyll; Chl accum , accumulated chlorophyll content; Chl loss , duration of rapid chlorophyll loss; Chl per , duration of chlorophyll persistence; Chl tot , total duration of chlorophyll persistence and loss; o Cd, degree day; GA, green area; GA accum , accumulated green area; GA loss , duration of rapid green area loss; GA per , duration of green area persistence;GA tot , total duration of green area persistence and loss; GF, grain filling; GFR, grain filling rate; H 2 , broad sense heritability; LOD, logarithm of the odds; Max chl, maximum chlorophyll content; Max CLR, maximum chlorophyll loss rate; Max GALR, maximum green area loss rate; MWC, maximum water content of grain; QTL, quantitative trait locus; RIL, recombinant inbred line; TGW, thousand grain weight; t max , the time at maximum grain filling rate; t mwc , the time at maximum water content; WAR, grain water absorption rate; WLR, grain water loss rate. 2 AbstractThe physiological process of how anthesis time and leaf senescence patterns affect individual grain weight of wheat has only been partially elucidated. In this study, a recombinant inbred line mapping population of bread wheat (Triticum aestivum L. 'Forno') and its relative spelt (Triticum spelta L. 'Oberkulmer'), contrasting for phasic development and leaf senescence kinetics, was used to understand the physiological and genetic relationships among anthesis time, leaf senescence, grain filling processes, and individual grain weight. Phenotypic measurements were taken in the field over two growing seasons. The results showed that earlier anthesis and delayed leaf senescence were associated with larger grains. Furthermore, early anthesis and delayed but fast leaf senescence promoted grain filling rate (but shortened its duration), grain water absorption rate and maximum grain water content, while individual grain dry matter and water accumulation displayed strong relationships with individual grain weight. A total of 118 significant quantitative trait loci (QTL) were identified in this mapping population, including six QTL for anthesis dates, 24 for flag leaf senescence, 69 for grain filling traits, and 19 for individual grain weight. Frequent QTL coincidences between these traits were observed on chromosomes 2A, 3B, 4A, 4DL, 5A, 5B, 5DL and 7B. Analysis of allelic effects confirmed the above physiological relationships. Therefore, anthesis time and leaf senescence affect individual grain weight at least partly through their effects on individual grain dry matter and water accumulation, resulting from pleiotropy or tight gene linkages. Slightly early anthesis, and delayed but fast leaf senescence, can be used to maximize individual grain weight and yield potential in wheat.

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“…Besides the positive impact on wheat photosynthesis, elevated CO 2 was also found to stimulate the rate of individual wheat‐grain filling (e.g. Li et al . 2001).…”

Section: Resultsmentioning

confidence: 99%

Potential impact of climate change on selected agricultural crops in north‐eastern Austria

Alexandrov

Eitzinger

Cajic

et al. 2002

Global Change Biology

122

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The vulnerability and adaptation of major agricultural crops to various soils in north‐eastern Austria under a changing climate were investigated. The CERES crop model for winter wheat and the CROPGRO model for soybean were validated for the agrometeorological conditions in the selected region. The simulated winter wheat and soybean yields in most cases agreed with the measured data. Several incremental and transient global circulation model (GCM) climate change scenarios were created and used in the study. In these scenarios, annual temperatures in the selected region are expected to rise between 0.9 and 4.8 °C from the 2020s to the 2080s. The results show that warming will decrease the crop‐growing duration of the selected crops. For winter wheat, a gradual increase in air temperature resulted in a yield decrease. Incremental warming, especially in combination with an increase in precipitation, leads to higher soybean yield. A drier climate will reduce soybean yield, especially on soils with low water storage capacity. All transient GCM climate change scenarios for the 21st century, including the adjustment for only air temperature, precipitation and solar radiation, projected reductions of winter wheat yield. However, when the direct effect of increased levels of CO2 concentration was assumed, all GCM climate change scenarios projected an increase in winter wheat yield in the region. The increase in simulated soybean yield for the 21st century was primarily because of the positive impact of warming and especially of the beneficial influence of the direct CO2 effect. Changes in climate variability were found to affect winter wheat and soybean yield in various ways. Results from the adaptation assessments suggest that changes in sowing date, winter wheat and soybean cultivar selection could significantly affect crop production in the 21st century.

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Effects of elevated atmospheric CO2 and drought stress on individual grain filling rates and durations of the main stem in spring wheat

Cited by 29 publications

References 22 publications

Wheat grain quality under increasing atmospheric CO2 concentrations in a semi-arid cropping system

Wheat grain quality under increasing atmospheric CO2 concentrations in a semi-arid cropping system

Early anthesis and delayed but fast leaf senescence contribute to individual grain dry matter and water accumulation in wheat

Potential impact of climate change on selected agricultural crops in north‐eastern Austria

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