Post-anthesis warm nights reduce grain weight in field-grown wheat and barley

García, Guillermo; Serrago, Román A.; Dreccer, M. Fernanda; Miralles, Daniel J.

doi:10.1016/j.fcr.2016.06.002

Cited by 91 publications

(82 citation statements)

References 61 publications

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“…In contrast, in the hottest experimental year, Y2R, the already low number of grains per square metre could not be filled to the same level as in the remaining trials (Table 2, Figure 10). These results are in accordance with the decreased barley GY in response to experimental warming reported by [52][53][54]. In Y2R ambient air temperatures were close to or below LT50 of barley cultivars [42,51] during a first pronounced frost period in January and before plants were covered and thus protected by snow.…”

Section: Heatsupporting

confidence: 90%

Agrobiodiversity for Adaptive and Yield Traits in Romanian and Italian Barley Cultivars across Four Continental Environments

Rizza¹,

Vasilescu²,

Badeck³

et al. 2018

Agronomy

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Within temperate climates the frequency and severity of high and low temperature stresses vary with continentality. The current study reports on the assessment of the performance of 49 barley cultivars across four environments. The cultivars stem from 50 years of breeding activities in Romania and Italy, in two temperate climates that differ in continentality. The plants were phenotyped through stress monitoring, measurements of yield and yield related traits as well as laboratory stress tolerance tests. Genotypes for alleles of vernalisation and photoperiod genes were determined. These genes were significantly associated with frost damage in the field and frost tolerance in laboratory tests. Grain yield (GY) was more closely correlated with the number of grain sinks than with the degree of grain filling indicating major limitations in the vegetative growth phase and during grain initiation. High temperature stress during the grain filling phase significantly reduced GY. Frost damage due to freezing temperatures below −10 • C when plants were not protected by snow cover significantly reduced GY of sensitive cultivars. The characterisation of environmental cues that cause stresses with yield penalties as well as the susceptibility of genetically different cultivars lay the ground for future targeted selection.

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Section: Heatsupporting

confidence: 90%

Agrobiodiversity for Adaptive and Yield Traits in Romanian and Italian Barley Cultivars across Four Continental Environments

Rizza¹,

Vasilescu²,

Badeck³

et al. 2018

Agronomy

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“…Four degree higher night‐time temperature over ambient‐using custom‐designed chambers placed on bread wheat (variety ‐ Baguette 13 Premium) grown under field condition, resulted in 3% and 4% reduction in 1,000 grain weight and grain yield, respectively (Garcia, Serrago, Dreccer, & Miralles, ). Evidence for negative relationship between grain yield and HNT in wheat comes from research in controlled environments (Narayanan, Prasad, Fritz, Boyle, & Gill, ), field conditions (Garcia et al, ; Garcia, Dreccer, Miralles, & Serrago, ), and modelling studies (Sillmann, Kharin, Zhang, et al, ; Sillmann, Kharin, Zwiers, et al, ). Hence, it is timely to unravel the mechanistic responses that induce tolerance to HNT, in an attempt to support ongoing efforts by the breeding community, aimed at developing heat stress resilient wheat.…”

Section: Introductionmentioning

confidence: 99%

Carbon balance and source‐sink metabolic changes in winter wheat exposed to high night‐time temperature

Impa

Sunoj

Krassovskaya

et al. 2019

Plant Cell & Environment

107

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Carbon loss under high night‐time temperature (HNT) leads to significant reduction in wheat yield. Growth chamber studies were carried out using six winter wheat genotypes, to unravel postheading HNT (23°C)–induced alterations in carbon balance, source‐sink metabolic changes, yield, and yield‐related traits compared with control (15°C) conditions. Four of the six tested genotypes recorded a significant increase in night respiration after 4 days of HNT exposure, with all the cultivars regulating carbon loss and demonstrating different degree of acclimation to extended HNT exposure. Metabolite profiling indicated carbohydrate metabolism in spikes and activation of the TriCarboxylic Acid (TCA) cycle in leaves as important pathways operating under HNT exposure. A significant increase in sugars, sugar‐alcohols, and phosphate in spikes of the tolerant genotype (Tascosa) indicated osmolytes and membrane protective mechanisms acting against HNT damage. Enhanced night respiration under HNT resulted in higher accumulation of TCA cycle intermediates like isocitrate and fumarate in leaves of the susceptible genotype (TX86A5606). Lower grain number due to lesser productive spikes and reduced grain weight due to shorter grain‐filling duration determined HNT‐induced yield loss in winter wheat. Traits and mechanisms identified will help catalyze the development of physiological and metabolic markers for breeding HNT‐tolerant wheat.

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“…Another component of the climate change phenomena is the rapid increase in night temperature resulting in narrowing diurnal temperature amplitude. Recent studies indicate significant negative impact of high night temperature on yield and grain quality among field crops Garcia et al, 2015Garcia et al, , 2016Lyman et al, 2013;Prasad et al, 2011;Narayanan et al, 2015;Shi et al, 2013;Sunoj et al, 2016;Welch et al, 2010). Warmer nights negatively affect the balance between photosynthesis and night respiration rates, reducing the overall carbohydrate pool and biomass leading to reduced yield and lower HI Garcia et al, 2016;Shi et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Field crops and the fear of heat stress—Opportunities, challenges and future directions

Prasad

Bheemanahalli

2017

Field Crops Research

299

178

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Predicted increase in temperature variability can result in short duration of heat stress episodes coinciding with vulnerable reproductive processes leading to significant reduction in floretfertility in crops. Recent knowledge on alternations in the pollen and stigmatic morphology, pollen biochemical and lipid composition, variable sensitivity of floral reproductive organs and differential temperature thresholds across crops advances the knowledge on heat stress induced reduction in seed-set and harvest index. Rapid increase in night-time temperature, leading to narrowing diurnal temperature amplitude is a major emerging threat to sustain crop productivity. Interestingly, wild wheat (Aegilops spp.) with higher heat-tolerance and wild rice (Oryza officinalis) escaping damage by completing flowering during early morning hours, are examples of novel opportunities to breed field crops resilient to heat stress. Information on mechanisms leading to heat stress induced sterility is biased towards rice, wheat and sorghum, while the same across other field crops is limited. Hence, increasing research efforts in this direction is critical and timely.

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Post-anthesis warm nights reduce grain weight in field-grown wheat and barley

Cited by 91 publications

References 61 publications

Agrobiodiversity for Adaptive and Yield Traits in Romanian and Italian Barley Cultivars across Four Continental Environments

Agrobiodiversity for Adaptive and Yield Traits in Romanian and Italian Barley Cultivars across Four Continental Environments

Carbon balance and source‐sink metabolic changes in winter wheat exposed to high night‐time temperature

Field crops and the fear of heat stress—Opportunities, challenges and future directions

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