Repeated heat stress events during the reproductive phase impact the dynamic development of seeds in Brassica napus L.

Almeida, Lethicia Magno Massuia de; Coquemont-Guyot, Maëlle; Elie, Nicolas; Morvan‐Bertrand, Annette; Avice, Jean‐Christophe; Mollier, Alain; Brunel‐Muguet, Sophie

doi:10.1016/j.plantsci.2022.111559

Cited by 9 publications

(5 citation statements)

References 44 publications

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“…Our results demonstrated that with prolonged heat stress, g sw must be reset in new leaves by adjusting the number and size of the stomata. The heat stress duration likely caused different levels of impact on stomatal and physiological traits and highlighted the compensatory capacity of plants to cope with the stress environment (Almeida et al ., 2023).…”

Section: Discussionmentioning

confidence: 99%

StomaVision: stomatal trait analysis through deep learning

Wu,

Chen,

et al. 2024

Preprint

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StomaVision is an automated tool designed for high-throughput detection and measurement of stomatal traits, such as stomatal number, pore size, and closure rate. It provides insights into plant responses to environmental cues, streamlining the analysis of micrographs from field-grown plants across various species, including monocots and dicots. Enhanced by a novel collection method that utilizes video recording, StomaVision increases the number of captured images for robust statistical analysis. Accessible via an intuitive web interface at <https://stomavision.streamlit.app/> and available for local use in a containerized environment at <https://github.com/YaoChengLab/StomaVision>, this tool ensures long-term usability by minimizing the impact of software updates and maintaining functionality with minimal setup requirements. The application of StomaVision has provided significant physiological insights, such as variations in stomatal density, opening rates, and total pore area under heat stress. These traits correlate with critical physiological processes, including gas exchange, carbon assimilation, and water use efficiency, demonstrating the tool's utility in advancing our understanding of plant physiology. The ability of StomaVision to identify differences in responses to varying durations of heat treatment highlights its value in plant science research.

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Section: Discussionmentioning

confidence: 99%

StomaVision: stomatal trait analysis through deep learning

Wu,

Chen,

et al. 2024

Preprint

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“…High temperature stress has several effects on canola productivity particularly at the reproductive stage. When canola is developing reproductively, high temperature stress may affect flower initiation, pollination, fertilization, and oil content 22 . For canola, the two most important economic criteria are seed yield and seed oil contents.…”

Section: Introductionmentioning

confidence: 99%

Thiourea improves yield and quality traits of Brassica napus L. by upregulating the antioxidant defense system under high temperature stress

Ahmad,

Waraich,

Zulfiqar

et al. 2024

Sci Rep

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High temperature stress influences plant growth, seed yield, and fatty acid contents by causing oxidative damage. This study investigated the potential of thiourea (TU) to mitigate oxidative stress and restoring seed oil content and quality in canola. The study thoroughly examined three main factors: (i) growth conditions—control and high temperature stress (35 °C); (ii) TU supplementation (1000 mg/L)—including variations like having no TU, water application at the seedling stage, TU application at seedling stage (BBCH Scale-39), water spray at anthesis stage, and TU application at anthesis stage (BBCH Scale-60); (iii) and two canola genotypes, 45S42 and Hiola-401, were studied separately. High temperature stress reduced growth and tissue water content, as plant height and relative water contents were decreased by 26 and 36% in 45S42 and 27 and 42% Hiola-401, respectively, resulting in a substantial decrease in seed yield per plant by 36 and 38% in 45S42 and Hiola-401. Seed oil content and quality parameters were also negatively affected by high temperature stress as seed oil content was reduced by 32 and 35% in 45S42 and Hiola-401. High-temperature stress increased the plant stress indicators like malondialdehyde, H2O2 content, and electrolyte leakage; these indicators were increased in both canola genotypes as compared to control. Interestingly, TU supplementation restored plant performance, enhancing height, relative water content, foliar chlorophyll (SPAD value), and seed yield per plant by 21, 15, 30, and 28% in 45S42; 19, 13, 26, and 21% in Hiola-401, respectively, under high temperature stress as compared to control. In addition, seed quality, seed oil content, linoleic acid, and linolenic acid were improved by 16, 14, and 22% in 45S42, and 16, 11, and 23% in Hiola-401, as compared to control. The most significant improvements in canola seed yield per plant were observed when TU was applied at the anthesis stage. Additionally, the research highlighted that canola genotype 45S42 responded better to TU applications and exhibited greater resilience against high temperature stress compared to genotype Hiola-401. This interesting study revealed that TU supplementation, particularly at the anthesis stage, improved high temperature stress tolerance, seed oil content, and fatty acid profile in two canola genotypes.

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“…It is impossible to avoid the effects of long-term changes in the climate on plants. High temperature stress (HS) is a severe abiotic stressor that limits metabolism, development, and crop output on a global scale [ 1 , 2 , 3 ]. Many biochemical pathways crucial for plant growth and development are susceptible to damage from heat stress [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Nitric Oxide and Proline Modulate Redox Homeostasis and Photosynthetic Metabolism in Wheat Plants under High Temperature Stress Acclimation

Sehar

Mir

Khan

et al. 2023

Plants

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The effects of exogenously-sourced NO (nitric oxide, as 100 µM SNP) and proline (50 mM) in the protection of the photosynthetic performance of wheat (Triticum aestivum L.) plants against heat stress were investigated. The study focused on the mechanisms of proline accumulation, activity, gene expression of antioxidant enzymes, and NO generation. Plants were exposed to a temperature of 40 °C for 6 h per day over 15 days, then allowed to recover at 28 °C. Heat-stressed plants showed increased oxidative stress, with higher levels of H2O2 and TBARS (thiobarbituric acid reactive substances) and increased proline accumulation, ACS activity, ethylene evolution, and NO generation, which in turn leads to increased accumulation of antioxidant enzymes and reduced photosynthetic attributes. In the tested wheat cultivar, the exogenous application of SNP and proline under heat stress improved the photosynthesis and reduced oxidative stress by enhancing the enzymatic antioxidant defense system. Potentially, the promoter AOX (alternative oxidase) played a role in maintaining redox homeostasis by lowering H2O2 and TBARS levels. The genes for GR antioxidant and photosystem II core protein encoding psbA and psbB were highly up-regulated in nitric oxide and proline treated heat-stressed plants, indicating that ethylene positively impacted photosynthesis under high temperature stress. Moreover, nitric oxide supplementation under high temperature stress optimized ethylene levels to regulate the assimilation and metabolism of proline and the antioxidant system, lowering the adverse effects. The study showed that nitric oxide and proline increased high temperature stress tolerance in wheat by increasing the osmolytes accumulation and the antioxidant system, resulting in enhanced photosynthesis.

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Repeated heat stress events during the reproductive phase impact the dynamic development of seeds in Brassica napus L.

Cited by 9 publications

References 44 publications

StomaVision: stomatal trait analysis through deep learning

StomaVision: stomatal trait analysis through deep learning

Thiourea improves yield and quality traits of Brassica napus L. by upregulating the antioxidant defense system under high temperature stress

Nitric Oxide and Proline Modulate Redox Homeostasis and Photosynthetic Metabolism in Wheat Plants under High Temperature Stress Acclimation

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