Role of transcriptional regulation in auxin-mediated response to abiotic stresses

Frontiers in Genetics, Journal Year: 2024, Volume and Issue: 15

Published: April 24, 2024

Global climate change (GCC) is posing a serious threat to organisms, particularly plants, which are sessile. Drought, salinity, and the accumulation of heavy metals alter soil composition have detrimental effects on crops wild plants. The hormone auxin plays pivotal role in response stress conditions through fine regulation plant growth. Hence, rapid, tight, coordinated its concentration achieved by modulation at multiple levels. Beyond structural enzymes involved biosynthesis, transport, signal transduction, transcription factors (TFs) can finely rapidly drive specific tissues. Auxin Response Factors (ARFs) such as ARF4, 7, 8, 19 many other TF families, WRKY MADS, been identified play modulating various auxin-mediated responses recent times. Here, we review most relevant literature TFs associated with biosynthetic, signalling pathways miRNA-related feedback loops major abiotic stresses. Knowledge may be utmost importance counteracting GCC future agriculture pave way for increased resilience.

Language: Английский

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Selenium foliar application alleviates salinity stress in sweet william (Dianthus barbatus L.) by enhancing growth and reducing oxidative damage

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 15, 2025

Abstract Salinity is considered as one of the most important environmental stresses in plant growth and productivity around world by arid semi-arid areas; therefore, development an efficient strategy against salt stress crops urgently needed. Application Se thus appeared to be approach for improvement under saline condition. This study investigated effects salinity applying different NaCl levels (0, 30, 60, 90 mM) combination with foliar application at 5, 10, 15 µM) on morpho-physiological biochemical traits Dianthus barbatus . Done a factorial design completely randomized layout three replications, findings showed that caused significant reduction growth, increased electrolyte leakage malondialdehyde levels, activities antioxidant enzymes. At increase defects among treatments, positive level mM was recorded, whereas imposition improved some aspects: phenolic flavonoid contents; capacity boosted Se-stressed plants. Indeed, 10µM treatments controls, enhancing tolerance reflected. These evidences show cell membrane stabilization through maintaining compounds various protective functions coupled their enzyme low doses. In conclusion, foliage effective method enhance plant’s sweet william could turn out sustained solution agricultural production conditions.

Language: Английский

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Enhancing Seed Germination Under Abiotic Stress: Exploring the Potential of Nano-Fertilization

Journal of soil science and plant nutrition, Journal Year: 2024, Volume and Issue: 24(3), P. 5319 - 5341

Published: July 5, 2024

Language: Английский

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Ca2+-dependent H2O2 response in roots and leaves of barley - a transcriptomic investigation

BMC Plant Biology, Journal Year: 2025, Volume and Issue: 25(1)

Published: Feb. 20, 2025

Ca2+ and H2O2 are second messengers that regulate a wide range of cellular events in response to different environmental developmental cues. In plants, stress-induced has been shown initiate characteristic signatures; however, clear picture the molecular connection between H2O2-induced signals responses is missing, particularly cereal crops such as barley. Here, we employed RNA-seq analyses identify transcriptome changes roots leaves barley after treatment under conditions inhibited formation cytosolic transients. To end, plasma membrane channels were blocked by LaCl3 application prior stimulation tissues with H2O2. We examined expression patterns 4246 genes had previously be differentially expressed upon application. further compared their + treatment. Genes showing previous study considered Ca2+-dependent H2O2-responsive genes. These genes, numbering 331 1320 roots, could classified five four clusters, respectively. Expression several from each cluster confirmed RT-qPCR. furthermore performed network analysis potential regulatory paths known Ca2+-related newly identified responsive using recently described Stress Knowledge Map. This indicated transcription factors key points mediated cross-talk Ca2+. Our indicates about 70% require transient increase concentrations for alteration transcript abundance, whereas leaves, dependency was much lower at 33%. Targeted gene pathway modeling not only components signaling cascade plants but also yet connected stimuli-associated signaling. Potential this can analyzed other ultimately disentangle underlying mechanisms H2O2-associated signal transduction mechanisms. aid breeding improved stress resistance optimize performance productivity increasing climate challenges.

Language: Английский

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Ion Mobility and Segregation in Seed Surfaces Subjected to Cold Plasma Treatments

Journal of Agricultural and Food Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

Plasma treatment of seeds is an efficient procedure to accelerate germination, improve initial stages plant growth, and for protection against pathogen infection. Most studies relate these beneficial effects with biochemical modifications affecting the metabolism genetic growth factors young plants. Using barley seeds, in this work, we investigate redistribution ions seed surface upon their cold air plasmas. In addition, effect plasma lixiviation through seeds' hull when they are immersed water. Ion outer layers plasma-treated has been experimentally determined X-ray photoelectron spectroscopy analysis combination in-depth chemical profiling gas cluster ion beams. The results show that shallowest (at least up a depth ∼100 nm) there enrichment K+ Ca2+ ions, addition changes O/C N/C atomic ratios. These data have confirmed by electron microscopy/fluorescence cuts. Observations accounted Monte Carlo model, simulating electrostatic interactions develop between negative charge accumulated at due interaction sheath positive existing interior. Furthermore, it shown water immersion mobilized tend lixiviate more efficiently than pristine seeds. detection significant concentration NO3- anions attributed secondary reaction nitrogen species incorporated into during exposure reactive oxygen formed on treatment. implications findings improvement germination capacity discussed.

Language: Английский

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Allelochemicals Released from Rice Straw Inhibit Wheat Seed Germination and Seedling Growth

Agronomy, Journal Year: 2024, Volume and Issue: 14(10), P. 2376 - 2376

Published: Oct. 14, 2024

Recently, returning rice straw to soil has become a common problem in wheat production because it causes decreased seedling emergence. Allelopathy is an important factor affecting seed germination. However, the effects of extracts on germination and growth remain unclear. Wheat seeds seedlings were treated with 30 g L−1 leaf (L1), 60 (L2), stem (S1), (S2) sterile water (CK) study allelopathic growth. The α-amylase antioxidant enzyme activities seeds; agronomic traits, photosynthetic indicators, nutrient contents seedlings; phenolic acids determined. Common allelochemicals, including 4-hydroxybenzoic acid, hydrocinnamic trans-cinnamic vanillic benzoic protocatechualdehyde, caffeic syringic sinapic salicylic detected extracts. Low-concentration (30 L−1) had no effect rate seeds. High-concentration (60 by 11.00% 12.02%. Rice extract activity, gibberellin content but increased superoxide dismutase, peroxidase, catalase malondialdehyde Allelochemicals entered internal tissues seeds, where they activity ultimately leading inhibitory SPAD value indicators seedlings. fresh weight root length 31.37% 45.46%. nitrogen potassium These results indicated that low-concentration high-concentration released allelochemicals inhibited findings provide basis for improvement return techniques.

Language: Английский

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种子萌发调控的研究进展

Scientia Sinica Vitae, Journal Year: 2024, Volume and Issue: unknown

Published: April 1, 2024

种子萌发是植物生命周期的起始. 在萌发过程中, 干燥种子从静止状态迅速恢复代谢活性, 导致胚突破周围结构以完成萌发. 种子萌发是一个复杂的多步骤过程, 受许多内源和外源因子的调控, 在物种生存与繁衍和作物生产中具有重要的生物学和经济意义; 但其分子调控机制目前还不完全清楚. 近年来, 种子萌发及其调控的研究已取得了许多重要的成就. 本文在此基础上综述了种子萌发调控的研究进展, 主要包括种子萌发的生理调节、植物激素特别是脱落酸和赤霉素的作用、基因转录和转录后、特异性调控因子以及表观遗传的调控, 并提出了在本领域需要进一步研究的科学问题, 试图为深入理解种子萌发的分子机制, 从而为提高种子萌发活力和防止穗萌发提供参考.

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Antioxidant System of Scutellum During Germination and Early Growth of Maize Seedlings

Agriculture, Journal Year: 2024, Volume and Issue: 14(11), P. 2025 - 2025

Published: Nov. 11, 2024

Maize is among the world’s three most important cereals because it used for human consumption and agricultural feed. The embryo in monocotyledons contains a cotyledon that scutellum, which Chalqueño maize constitutes approximately 80% of embryo’s mass. activation metabolism during germination accompanied by production reactive oxygen species, must be maintained at low level to avoid damage. Little known about oxidative state but understand control stress final phase embryo–seedling transition. Among enzymes involved are class III peroxidase (POX), catalase (CAT), superoxide dismutase (SOD), were observed scutella isolated imbibed embryos between 0 36 h. activity SOD fluctuated over baseline value. POX was greater than CAT, showing differences them postgermination. activities CAT increased (0 18 h), stabilized towards (18 24 then again postgermination (24 h). biochemical marker scutellum marks transition from

Language: Английский

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Physiological quality of Passiflora edulis Sims seeds evaluated by different processing methods, storage times and packages

New Zealand Journal of Crop and Horticultural Science, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 18

Published: Nov. 13, 2024

Maintaining seed vigour during the storage process is essential for success of germplasm banks sexually propagated species such as Passiflora edulis. However, literature still scarce regarding efficient preservation methods, especially long periods. The objective this study was to evaluate effect different processing types packaging and conditions edulis seeds a period five years. Different methods (natural fermentation use mixer), (Falcon tubes, plastic bags paper bags), temperatures (room temperature, cold chamber refrigerator) evaluation times (one, three years) were analysed. Seeds stored in refrigerator maintained high germination (>90%) up at room temperature reduced their viability after one year storage. No significant variations observed between evaluated. Absence respiratory activity confirmed by tetrazolium test performed on years temperature. To maintain P. seeds, it recommended store them or using extraction.

Language: Английский

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Ca2+-dependent H2O2 response in roots and leaves of barley - A transcriptomic investigation

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 25, 2024

Background Ca²⁺ and H₂O₂ are second messengers that regulate a wide range of cellular events in response to different environmental developmental cues. In plants, stress-induced has been shown initiate characteristic signatures; however, clear picture the molecular connection between H₂O₂-induced Ca²⁺ signals responses is missing, particularly cereal crops such as barley. Here, we employed RNA-seq analyses identify transcriptome changes roots leaves barley after treatment under conditions inhibited formation cytosolic transients. To end, plasma membrane channels were blocked by LaCl₃ application prior stimulation tissues with H₂O₂. Results We examined expression patterns 4246 genes had previously be differentially expressed upon application. further compared their LaCl₃+H₂O₂ treatment. Genes showing previous study considered Ca²⁺-dependent H₂O₂-responsive genes. These genes, numbering 331 1320 roots, could classified five four clusters, respectively. Expression several from each cluster confirmed RT-qPCR. furthermore performed network analysis potential regulatory paths known Ca²⁺-related newly identified H₂O₂ responsive using recently described Stress Knowledge Map. This indicated transcription factors key points mediated cross-talk Ca²⁺. Conclusion Our indicates about 70% require transient increase concentrations for alteration transcript abundance, whereas leaves, dependency was much lower at 33%. Targeted gene pathway modeling not only components signaling cascade plants but also yet connected stimuli-associated signaling. Potential this can analyzed other ultimately disentangle underlying mechanisms H₂O₂-associated signal transduction mechanisms. aid breeding improved stress resistance optimize performance productivity increasing climate challenges.

Language: Английский

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