Quantifying the physiological, yield, and quality plasticity of Southern USA soybeans under heat stress

Poudel, Sadikshya; Adhikari, Bikash; Dhillon, Jagmandeep; Reddy, K. Raja; Stetina, Salliana R.; Bheemanahalli, Raju

doi:10.1016/j.stress.2023.100195

Cited by 10 publications

(7 citation statements)

References 74 publications

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“…Notably, the drought-stressed plants-maintained greenness similar to the control (Figure 2a; Supplementary Figure S1a), by sustaining chlorophyll pigment content (Jurik, 1986). Likewise, heat-stressed plants increased their transpiration rate (Figure 2e) to maintain a cooler canopy (Sinha et al, 2022; Poudel et al, 2023a). As an adaptive strategy (differential transpiration) under interactive heat and drought, plants close leaf stomata while flower and pod stomata remain open (Cohen et al, 2021b; Sinha et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…The negative impact of combined stress on yield was 2-fold higher compared to drought or heat alone (Figure 3), with a similar response recorded in other crops (Bheemanahalli et al, 2022b). On the other hand, despite significant difference in seed number between drought and heat, seed weight remains similar, indicating that water limitation has more damaging impacts on pod number than heat stress (Poudel et al, 2023a). With the increase in canopy temperature by 8 °C under the combined stress, there was more than a 50% reduction in seed weight and number.…”

Section: Discussionmentioning

confidence: 99%

“…These decreases were associated with reduced stomatal conductance and increased canopy temperature under drought. Under heat stress, stomatal conductance and transpiration were increased or on par with control, but seed number (4.2%) and seed weight (5%) reduced per ℃ increase in temperature over 32 ℃ (Poudel et al, 2023a). For every one °C increase above average temperature (27.6°C), soybean yields are expected to decline by 2.4% (Hatfield et al, 2011;Alsajri et al, 2022).…”

Section: Introductionmentioning

confidence: 98%

“…This primarily affects the photosynthetic process and accelerates leaf senescence by activating metabolic changes at the source (leaf) and sink (seed) (Hatfield et al, 2011;Wang et al, 2008). However, soybean genotypes respond differently to individual heat stress or drought, with some genotypes exhibiting significant plasticity (Poudel et al, 2023a). Small-seeded soybeans were less sensitive to heat stress than large-seeded soybeans (Puteh et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Negative Synergistic Effects of Drought and Heat During Flowering and Seed Setting in Soybean

Poudel,

Vennam,

Sankarapillai

et al. 2024

Preprint

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Rising temperatures and intense heatwaves combined with lower precipitations are the new norms of current global scenarios. These altered climatic conditions negatively impact soybean yield potential and quality. Ten soybean cultivars were subjected to four different growing conditions: control, drought, heat, and combined heat and drought to understand the physiological, yield, and molecular changes. Stomatal conductance was reduced by 62% and 10% under drought and heat, respectively. This reduction was further exacerbated to 93% when exposed to both stresses simultaneously. The highest canopy temperature was recorded at +8 oC with combinatorial treatments, whereas heat and drought exhibited +5.4 oC and +2 oC, respectively. Furthermore, combined stress displayed a more pronounced negative impact on greenness-associated vegetative index; the gene expression analysis further corroborated these findings. Particularly, each oC increase in temperature during flowering-seed filling reduced seed weight by ~7% and ~4% with and without drought, respectively. The seed protein increased under drought, whereas the oil showed a converse trend under drought and combined stresses. Most physiology and yield traits showed no significant correlations between control or individual and combined stress. This suggests that selection for combinatorial stress may not be appropriate based on nonstress or individual stress performance. Thus, incorporating stress-resilient traits into elite soybean cultivars could significantly boost soybean production under hot and dry climatic conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Negative Synergistic Effects of Drought and Heat During Flowering and Seed Setting in Soybean

Poudel,

Vennam,

Sankarapillai

et al. 2024

Preprint

Self Cite

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“…The effect of heat stress on crop morphology, physiology, and reproduction has been well-studied in various crop species (Bita and Gerats, 2013;Prasad et al, 2017;Jagadish et al, 2021), although the responses differ across species and genotypes. Heat imposed in vegetative tissue has been found to negatively affect vital physiological processes, including chlorophyll content, photosynthesis, cellular respiration, and stomatal conductance (Almeselmani et al, 2012;Moore et al, 2021;Poudel et al, 2023). Additionally, heat stress has been found to increase Reactive Oxygen Species (ROS) activity, which affects the cellular structure and the production of pigments and can deteriorate the thylakoid membranes (Jumrani and Bhatia, 2019).…”

Section: Introductionmentioning

confidence: 99%

Genetic Dissection of Heat Stress Tolerance in Soybean through Genome-Wide Association Studies and the Use of Genomic Prediction to Enhance Breeding Applications

Van der Laan,

Peixoto,

Singh

2024

Preprint

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Rising temperatures and associated heat stress pose an increasing threat to soybean [Glycine max L. (Merr.)] productivity. Due to a limited choice of mitigation strategies, the primary arsenal in crop protection comes from improved genetic stress tolerance. Despite this current and looming threat to soybean production, limited studies have examined the genetics of heat stress tolerance. There is a need to conduct large-scale germplasm screening and genetic studies, including genome-wide association mapping and genomic prediction, to identify genomic regions and useful markers associated with heat tolerance traits that can be utilized in soybean breeding programs. We screened a diverse panel of 450 soybean accessions from MG 0- IV to dissect the genetic architecture of physiological and growth-related traits under optimal and heat stress temperatures and study trait relationships and predictive ability. The genetic architecture information of the response to heat revealed in this study provides insights into the genetics of heat stress tolerance. Thirty-seven significant SNPs were detected, with 20 unique SNPs detected in optimal, 16 detected in heat stress, and a single SNP detected for a heat tolerance index. Only one significant SNP was identified across temperature treatments indicating a genetic divergence in soybean responses to temperature. The genomic prediction worked well for biomass traits, but physiological traits associated with heat stress had poor model accuracy. Through our phenotyping efforts, we identified heat tolerant soybean accessions. The identification of heat tolerant accessions and significant SNPs are useful in heat tolerant variety development through marker-assisted and genomic selection.

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Enhancing Soybean (Glycine max L. Merr) Heat Stress Tolerance: Effects of Sowing Date on Seed Yield, Oil Content, and Fatty Acid Composition in Hot Climate Conditions

Kalantar Ahmadi,

Daneshian

2024

Food Science & Nutrition

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High temperatures can impede the growth and development of soybean plants, resulting in decreased yield and seed quality. Heat‐induced damage can be mitigated by adjusting sowing date and selecting genotypes that are suitable for cultivation in hot climates. A 2‐year (2017–2018) field experiment was conducted at Safiabad Agricultural and Natural Resources Research and Education Center, employing a split‐plot design with three replications. The main plots were assigned three different sowing dates (June 22, July 6, and July 21), while the subplots featured eight soybean genotypes (SF1, SF2, SF3, SK93, M13, SG4, SG5, and Salend) belonged to IV to VI maturity groups. Temperature affected the fatty acid composition across all genotypes. Planting soybeans on June 22 and July 6 resulted in a 16% and 8% decrease in seed yield, respectively, compared to planting on July 21 over 2 years of experiments. SK93 exhibited the highest oil content (25.59%) when sown on the third date (July 21), whereas the SF3 genotype planted on June 22 displayed the lowest oil content (18.68%). Based on our findings, a decrease of approximately 0.33% in oil content and a 0.7% increase in protein content were observed with a one‐degree temperature rise from 33°C during the seed‐filling period. When the temperature ranged between 36°C and 38°C, the highest seed yield (2665–3008 kg.ha−1) was obtained, whereas the lowest seed yield (1940 kg.ha−1) occurred at 41.60°C. Delaying planting led to a higher seed yield (19.72%) and enhanced seed oil content (11.54%). The indeterminate growth genotype SK93 consistently showed the highest average seed yield (3231 kg.ha−1) over the 2‐year experiment, exceeding other genotypes.

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Quantifying the physiological, yield, and quality plasticity of Southern USA soybeans under heat stress

Cited by 10 publications

References 74 publications

Negative Synergistic Effects of Drought and Heat During Flowering and Seed Setting in Soybean

Negative Synergistic Effects of Drought and Heat During Flowering and Seed Setting in Soybean

Genetic Dissection of Heat Stress Tolerance in Soybean through Genome-Wide Association Studies and the Use of Genomic Prediction to Enhance Breeding Applications

Enhancing Soybean (Glycine max L. Merr) Heat Stress Tolerance: Effects of Sowing Date on Seed Yield, Oil Content, and Fatty Acid Composition in Hot Climate Conditions

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