Responses of sorghum to cold stress: A review focused on molecular breeding

Hernández, Pedro Fernando Vera; Onofre, L.E Mendoza; Rosas-Cárdenas, Flor de Fátima

doi:10.3389/fpls.2023.1124335

Cited by 10 publications

(3 citation statements)

References 170 publications

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“…The diminished growth of maize can be attributed to the vulnerability of its C4 photosynthetic mechanism to low temperatures. This susceptibility can, in turn, be influenced by the upregulation of C-repeat binding factor/dehydration-responsive element-binding (CBF/DREB) proteins, necessary for activating cold-responsive genes, thereby inhibiting growth [80]. Cold stress hampers growth by inhibiting metabolic and physiological processes, such as water absorption, cellular dehydration, and oxidative stress [81,82].…”

Section: Discussionmentioning

confidence: 99%

Crop-Specific Responses to Cold Stress and Priming: Insights from Chlorophyll Fluorescence and Spectral Reflectance Analysis in Maize and Soybean

Mazur,

Matoša Kočar,

Jambrović

et al. 2024

Plants

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This study aimed to investigate the impact of cold stress and priming on photosynthesis in the early development of maize and soybean, crops with diverse photosynthetic pathways. The main objectives were to determine the effect of cold stress on chlorophyll a fluorescence parameters and spectral reflectance indices, to determine the effect of cold stress priming and possible stress memory and to determine the relationship between different parameters used in determining the stress response. Fourteen maize inbred lines and twelve soybean cultivars were subjected to control, cold stress, and priming followed by cold stress in a walk-in growth chamber. Measurements were conducted using a portable fluorometer and a handheld reflectance instrument. Cold stress induced an overall downregulation of PSII-related specific energy fluxes and efficiencies, the inactivation of RCs resulting in higher energy dissipation, and electron transport chain impairment in both crops. Spectral reflectance indices suggested cold stress resulted in pigment differences between crops. The effect of priming was more pronounced in maize than in soybean with mostly a cumulatively negative effect. However, priming stabilized the electron trapping efficiency and upregulated the electron transfer system in maize, indicating an adaptive response. Overall, this comprehensive analysis provides insights into the complex physiological responses of maize and soybean to cold stress, emphasizing the need for further genotype-specific cold stress response and priming effect research.

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Section: Discussionmentioning

confidence: 99%

Crop-Specific Responses to Cold Stress and Priming: Insights from Chlorophyll Fluorescence and Spectral Reflectance Analysis in Maize and Soybean

Mazur,

Matoša Kočar,

Jambrović

et al. 2024

Plants

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“…Moreover, temperature fluctuations often increase respiration rates in plants, resulting in a higher energy demand, which can deplete plant resources and negatively impact overall growth and yield (Debnath et al, 2022; Sharma et al, 2022). It has been well‐documented that CS decreases grain yield in various crop plants (Rane et al, 2021; Ullah et al, 2022; Kuczyński et al, 2022; Li et al, 2022b; Bhat et al, 2022; Hernández et al, 2023), significantly impacting future food security for the growing population. For instance, CS at 13/8°C decreased maize yield by 21.87% (Waqas et al, 2017), while CS at 4°C decreased wheat yield by 40% (Li et al, 2017).…”

Section: Impact Of Climate Change and Extreme Temperature On Crop Pro...mentioning

confidence: 99%

Temperature‐smart plants: A new horizon with omics‐driven plant breeding

Raza,

Bashir,

Khare

et al. 2024

Physiologia Plantarum

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The adverse effects of mounting environmental challenges, including extreme temperatures, threaten the global food supply due to their impact on plant growth and productivity. Temperature extremes disrupt plant genetics, leading to significant growth issues and eventually damaging phenotypes. Plants have developed complex signaling networks to respond and tolerate temperature stimuli, including genetic, physiological, biochemical, and molecular adaptations. In recent decades, omics tools and other molecular strategies have rapidly advanced, offering crucial insights and a wealth of information about how plants respond and adapt to stress. This review explores the potential of an integrated omics‐driven approach to understanding how plants adapt and tolerate extreme temperatures. By leveraging cutting‐edge omics methods, including genomics, transcriptomics, proteomics, metabolomics, miRNAomics, epigenomics, phenomics, and ionomics, alongside the power of machine learning and speed breeding data, we can revolutionize plant breeding practices. These advanced techniques offer a promising pathway to developing climate‐proof plant varieties that can withstand temperature fluctuations, addressing the increasing global demand for high‐quality food in the face of a changing climate.

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“…C4 plants are generally considered more tolerant to abiotic stress (Pardo & VanBuren, 2021). Transcriptomic studies in C4 plants such as maize and sorghum in response to heat, cold, or drought reveal significant variation in gene expression responses depending on the genotype (Abdel‐Ghany et al., 2020; Frey et al., 2015; Shi et al., 2017; Sunoj et al., 2017; Tack et al., 2017; Vera Hernández et al., 2023; Zhou et al., 2022). Furthermore, cis ‐element/motif variation of stress‐responsive genes are also observed within genotypes of the same species suggesting that genotype‐specific molecular signatures may play key roles in the tolerance mechanisms for some plants (Liu et al., 2020; Lovell et al., 2016; Waters et al., 2017; Zhou et al., 2022).…”

Section: Introductionmentioning

confidence: 99%

Time of day and genotype sensitivity adjust molecular responses to temperature stress in sorghum

Bonnot,

Somayanda,

Jagadish

et al. 2023

The Plant Journal

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SUMMARYSorghum is one of the four major C4 crops that are considered to be tolerant to environmental extremes. Sorghum shows distinct growth responses to temperature stress depending on the sensitivity of the genetic background. About half of the transcripts in sorghum exhibit diurnal rhythmic expressions emphasizing significant coordination with the environment. However, an understanding of how molecular dynamics contribute to genotype‐specific stress responses in the context of the time of day is not known. We examined whether temperature stress and the time of day impact the gene expression dynamics in thermo‐sensitive and thermo‐tolerant sorghum genotypes. We found that time of day is highly influencing the temperature stress responses, which can be explained by the rhythmic expression of most thermo‐responsive genes. This effect is more pronounced in thermo‐tolerant genotypes, suggesting a stronger regulation of gene expression by the time of day and/or by the circadian clock. Genotypic differences were mostly observed on average gene expression levels, which may be responsible for contrasting sensitivities to temperature stress in tolerant versus susceptible sorghum varieties. We also identified groups of genes altered by temperature stress in a time‐of‐day and genotype‐specific manner. These include transcriptional regulators and several members of the Ca2+‐binding EF‐hand protein family. We hypothesize that expression variation of these genes between genotypes along with time‐of‐day independent regulation may contribute to genotype‐specific fine‐tuning of thermo‐responsive pathways. These findings offer a new opportunity to selectively target specific genes in efforts to develop climate‐resilient crops based on their time‐of‐day and genotype variation responses to temperature stress.

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Responses of sorghum to cold stress: A review focused on molecular breeding

Cited by 10 publications

References 170 publications

Crop-Specific Responses to Cold Stress and Priming: Insights from Chlorophyll Fluorescence and Spectral Reflectance Analysis in Maize and Soybean

Crop-Specific Responses to Cold Stress and Priming: Insights from Chlorophyll Fluorescence and Spectral Reflectance Analysis in Maize and Soybean

Temperature‐smart plants: A new horizon with omics‐driven plant breeding

Time of day and genotype sensitivity adjust molecular responses to temperature stress in sorghum

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