Regulatory networks in plant responses to drought and cold stress

PLANT PHYSIOLOGY, Journal Year: 2024, Volume and Issue: 195(1), P. 170 - 189

Published: March 21, 2024

Abstract Drought and cold represent distinct types of abiotic stress, each initiating unique primary signaling pathways in response to dehydration temperature changes, respectively. However, a convergence at the gene regulatory level is observed where common set stress-responsive genes activated mitigate impacts both stresses. In this review, we explore these intricate networks, illustrating how plants coordinate stress signals into collective transcriptional strategy. We delve molecular mechanisms perception, signaling, activation pathways, with focus on insights gained from model species. By elucidating shared aspects plant responses drought cold, provide insight adaptive strategies plants, paving way for engineering stress-resilient crop varieties that can withstand changing climate.

Language: Английский

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Cryo-EM structures of the plant plastid-encoded RNA polymerase

Cell, Journal Year: 2024, Volume and Issue: 187(5), P. 1127 - 1144.e21

Published: Feb. 1, 2024

Language: Английский

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Circadian regulation of metabolism across photosynthetic organisms

The Plant Journal, Journal Year: 2023, Volume and Issue: 116(3), P. 650 - 668

Published: Aug. 2, 2023

SUMMARY Circadian regulation produces a biological measure of time within cells. The daily cycle in the availability light for photosynthesis causes dramatic changes biochemical processes photosynthetic organisms, with circadian clock having crucial roles adaptation to these fluctuating conditions. Correct alignment between and environmental day–night cycles maximizes plant productivity through its metabolism. Therefore, that integrate metabolism are key understanding how contributes productivity. This forms an important part exploiting knowledge enhance sustainable crop production. Here, we examine metabolic source sink organ structures Arabidopsis. We also evaluate possible root exudation deposit carbon into soil, nature rhythmic interactions plants their associated microbial communities. Finally, shared differing aspects Arabidopsis other model control non‐photosynthetic organisms. synthesis identifies variety future research topics, including focus on underlie biotic ecosystems.

Language: Английский

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Effects of Low-Temperature Stress on Physiological Characteristics and Microstructure of Stems and Leaves of Pinus massoniana L.

Plants, Journal Year: 2024, Volume and Issue: 13(16), P. 2229 - 2229

Published: Aug. 11, 2024

Pinus massoniana L. is one of the most important conifer species in southern China and mainstay forest ecosystem timber production, yet low temperatures limit its growth geographical distribution. This study used 30-day-old seedlings from families varying cold-tolerance to examine morphological traits needles stems, chlorophyll fluorescence characteristics, protective enzymes, changes starch lignin under different low-temperature stresses an artificial climate chamber. The results showed that exhibited phenotypic morphology tissue structure stress. Physiological biochemical indexes such as osmoregulatory substances, starch, responded cold-tolerant family increased soluble sugars, grain, content well peroxidase activity, decreased malondialdehyde by increasing levels actual photochemical efficiency (ΦPSII), electron transport rate (ETR), quenching (qP) improve cold tolerance ability. provides a reference for selection breeding genetic resources mechanism cold-tolerance, analysis adaptation climatic regions China.

Language: Английский

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Identification of candidate genes controlling cold tolerance at the early seedling stage from Dongxiang wild rice by QTL mapping, BSA-Seq and RNA-Seq

BMC Plant Biology, Journal Year: 2024, Volume and Issue: 24(1)

Published: July 9, 2024

Abstract Background The cold tolerance of rice is closely related to its production and geographic distribution. identification tolerance-related genes important significance for developing cold-tolerant rice. Dongxiang wild ( Oryza rufipogon Griff.) (DXWR) well-adapted the climate northernmost-latitude habitats ever found in world, one most valuable germplasms improvement. Results Transcriptome analysis revealed differentially expressed between Xieqingzao B (XB; a sensitive variety) 19H19 (derived from an interspecific cross DXWR XB) room temperature (RT), low (LT), recovery treatments. results demonstrated that chloroplast might be involved regulation A high-resolution SNP genetic map was constructed using 120 BC 5 F 2 lines derived XB based on genotyping-by-sequencing (GBS) technique. Two quantitative trait loci (QTLs) at early seedling stage (CTS), qCTS12 qCTS8 , were detected. Moreover, total 112 candidate associated with identified bulked segregant sequencing (BSA-seq). These divided into eight functional categories, expression trend ‘oxidation-reduction process’ ‘response stress’ differed RT, LT Among these genes, level LOC_Os12g18729 (related stress’) decreased treatment but restored enhanced during whereas declined treatment. Additionally, contained 42-bp deletion third exon genotype individuals survival percentage (SP) lower than 15% consistent XB. Weighted gene coexpression network (WGCNA) modular regulatory learning per information (MERLIN) algorithm interaction/coexpression regulating In network, (DEGs) process’, ‘protein phosphorylation’ interacted . knockout mutant signifcantly compared type. Conclusions general, study basis development varieties. present study, QTL mapping, BSA-seq RNA-seq integrated identify two CTS QTLs Furthermore, qRT-PCR, indicated could are expected further exploration mechanism improve cultivated by introducing tolerant through marker-assisted selection.

Language: Английский

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Regreening mechanisms in cucumber: insights from a CsSIG2 mutation affecting chloroplast development

Theoretical and Applied Genetics, Journal Year: 2025, Volume and Issue: 138(4)

Published: March 23, 2025

Language: Английский

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Effects of Ca2+ signaling inhibition on cold acclimation in winter rapeseed

Plant Stress, Journal Year: 2025, Volume and Issue: unknown, P. 100839 - 100839

Published: April 1, 2025

Language: Английский

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Photosynthetic and plastid performance effects of photoreceptors

Journal of Mitochondria Plastids and Endosymbiosis, Journal Year: 2024, Volume and Issue: 2(1)

Published: March 20, 2024

Photoreceptors facilitate plants in adjusting their growth and development according to ever-changing surroundings. Modifications plant architecture, chloroplast positioning, structure, alongside changes protein pigment composition, mainly the photosynthetic apparatus, aid optimising photosynthesis, allowing for effective conversion of solar energy into chemical while avoiding damage from excess light. Photoreceptors, such as phytochromes, cryptochromes, phototropins, UVR8, play a crucial role decoding environmental cues transforming them multifaceted signals leading gene expression post-translational processes both nucleus plastids. Not only initial etioplasts or proplastids chloroplasts seedlings young tissues, but also diurnal cycles darkness light transitional stages prevailing shaded environments challenge adaptation photosynthesis daily life are tightly controlled by photoreceptors.

Language: Английский

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Circadian and environmental signal integration in a natural population of Arabidopsis

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(35)

Published: Aug. 22, 2024

Plants sense and respond to environmental cues during 24 h fluctuations in their environment. This requires the integration of internal such as circadian timing with light temperature elicit cellular responses through signal transduction. However, transduction signals by plants growing natural environments remains poorly understood. To gain insights into dynamics signaling nature, we performed a field study from nucleus chloroplasts population Arabidopsis halleri. Using several modeling approaches interpret data, identified that clock are key regulators this pathway under conditions. We potential time-delay steps between components, diel response reminiscent process gating. found our framework can be extended other pathways undergo oscillations cues. approach combining studies gene expression allowed us identify dynamic cues, plant cells, naturally fluctuating cycles.

Language: Английский

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Cytonuclear interactions modulate the plasticity of photosynthetic rhythmicity and growth in wild barley

Physiologia Plantarum, Journal Year: 2024, Volume and Issue: 176(1)

Published: Jan. 1, 2024

Abstract In plants, the contribution of plasmotype (mitochondria and chloroplast) in controlling circadian clock plasticity possible consequences on cytonuclear genetic makeup have yet to be fully elucidated. A genome‐wide association study wild barley ( Hordeum vulgare ssp. spontaneum ) B1K collection identified overlap with our previously mapped DRIVERS OF CLOCKS DOCs loci wild‐cultivated interspecific population. Moreover, we non‐random segregation epistatic interactions between nuclear chloroplastic RpoC1 gene, indicating an adaptive value for specific gene combinations. Furthermore, show that DOC1.1 , which harbours candidate SIGMA FACTOR‐B SIG‐B is linked differential expression CCA1 genes contributes gating response heat. High‐resolution temporal growth photosynthesis measurements also link growth, Chl content quantum yield. To validate involvement Plastid encoded polymerase (PEP) complex, over‐expressed two alleles Arabidopsis significant under elevated temperatures. Finally, enhanced de novo ENU (N‐Ethyl‐N‐nitrosourea) ‐induced rpoB1 mutant further implicates PEP complex as a key player regulating output. Overall, this highlights interaction rpoC1 (PEP gene) distinct timing regulation heat, their pleiotropic effects implicate value.

Language: Английский

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