Remobilization of leaf Na+ content and use of nonstructural carbohydrates vary depending on the time when salt stress begins in woody species

Lima, Laís Luana de; Frosi, Gabriella; Lopes, Rafaela; Santos, Mariana

doi:10.1016/j.plaphy.2020.11.026

Cited by 7 publications

(4 citation statements)

References 42 publications

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“…Sodium ions compete with K + ions for the same transport channels of the plasma membranes, leading to inadequate water availability and ion toxicity. However, there are several strategies of Na + reduction in plants, including Na + uptake inhibition, Na + efflux, and Na + compartmentalization [ 39 ]. Therefore, the ability to maintain the cellular Na + /K + homeostasis reflects the salt tolerance [ 4 , 40 ].…”

Section: Discussionmentioning

confidence: 99%

Comprehensive Transcriptome Analysis Uncovers Distinct Expression Patterns Associated with Early Salinity Stress in Annual Ryegrass (Lolium Multiflorum L.)

Feng

Xiao

Wang

et al. 2022

IJMS

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Soil salination is likely to reduce crop production worldwide. Annual ryegrass (Lolium multiflorum L.) is one of the most important forages cultivated in temperate and subtropical regions. We performed a time-course comparative transcriptome for salinity-sensitive (SS) and salinity-insensitive (SI) genotypes of the annual ryegrass at six intervals post-stress to describe the transcriptional changes and identify the core genes involved in the early responses to salt stress. Our study generated 215.18 Gb of clean data and identified 7642 DEGs in six pairwise comparisons between the SS and SI genotypes of annual ryegrass. Function enrichment of the DEGs indicated that the differences in lipid, vitamins, and carbohydrate metabolism are responsible for variation in salt tolerance of the SS and SI genotypes. Stage-specific profiles revealed novel regulation mechanisms in salinity stress sensing, phytohormones signaling transduction, and transcriptional regulation of the early salinity responses. High-affinity K+ (HAKs) and high-affinity K1 transporter (HKT1) play different roles in the ionic homeostasis of the two genotypes. Moreover, our results also revealed that transcription factors (TFs), such as WRKYs, ERFs, and MYBs, may have different functions during the early signaling sensing of salt stress, such as WRKYs, ERFs, and MYBs. Generally, our study provides insights into the mechanisms of the early salinity response in the annual ryegrass and accelerates the breeding of salt-tolerant forage.

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Section: Discussionmentioning

confidence: 99%

Comprehensive Transcriptome Analysis Uncovers Distinct Expression Patterns Associated with Early Salinity Stress in Annual Ryegrass (Lolium Multiflorum L.)

Feng

Xiao

Wang

et al. 2022

IJMS

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“…Legumes are important in food standards maintenance and contribute to soil properties through biological nitrogen fixation; however, abiotic factors, such as high salt concentrations in soils, limit their performance. Previously, studies have verified the relevance of C. pyramidale in successional gradients (Falcão et al 2015), mycorrhizal symbiosis under hydrated conditions (Frosi et al 2016a), drought stress (Frosi et al 2016b), and salinity (Frosi et al 2018; Lima et al 2021), and it is suggested that this nonmodel species has the potential to identify new genes using a transcriptomic approach.…”

Section: Introductionmentioning

confidence: 94%

“…Elevated salt levels in the soil cause the plant to undergo physiological drought, making water absorption difficult for the root system (Wang et al 2018a). In relation to ionic stress, Na + and Cl − accumulation promotes an imbalance in the Na + /K + and Na + /Ca 2+ ratios, leading to oxidative stress due to the higher production of reactive oxygen species (ROS; Apse & Blumwald 2007; Evelin et al 2019; Lima et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Transcriptome of Cenostigma pyramidale roots, a woody legume, under different salt stress times

Frosi

Ferreira‐Neto

Bezerra-Neto

et al. 2021

Physiologia Plantarum

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Salinity stress has a significant impact on the gain of plant biomass. Our study provides the first root transcriptome of Cenostigma pyramidale, a tolerant woody legume from a tropical dry forest, under three different salt stress times (30 min, 2 h, and 11 days). The transcriptome was assembled using the RNA sequencing (RNA‐Seq) de novo pipeline from GenPipes. We observed 932, 804, and 3157 upregulated differentially expressed genes (DEGs) and 164, 273, and 1332 downregulated DEGs for salt over 30 min, 2 h, and 11 days, respectively. For DEGs annotated with the Viridiplantae clade in the early stress periods, the response to salt stress was mainly achieved by stabilizing homeostasis of such ions like Na+ and K+, signaling by Ca2+, transcription factor modulation, water transport, and oxidative stress. For salt stress at 11 days, we observed a higher modulation of transcription factors including the WRKY, MYB, bHLH, NAC, HSF, and AP2‐EREBP families, as well as DEGs involved in hormonal responses, water transport, sugar metabolism, proline, and reactive oxygen scavenging mechanisms. Five selected DEGs (K+ transporter, aquaporin, glutathione S‐transferase, cyclic nucleotide‐gated channel, and superoxide dismutase) were validated by qPCR. Our results indicated that C. pyramidale had an early perception of salt stress modulating ionic channels and transporters, and as the stress progressed, the focus turned to the antioxidant system, aquaporins, and complex hormone responses. The results of this first root transcriptome provide clues on how this native species modulate gene expression to achieve salt stress tolerance.

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“…Under drought and salt stress, biochemical traits such as leaf chlorophyll content may increase, decrease, or remain unchanged, depending on the species, and the duration and intensity of the stress ( Anjum et al., 2011 ; Acosta-Motos et al., 2017 ). Non-structural carbohydrates (NSC), including soluble sugars and starch, represent the balance between carbon supply and carbon assimilation in woody plants, and it has been shown that both drought and salt stress can lead to a decrease in NSC content in woody plants ( Sevanto et al., 2014 ; Lima et al., 2021 ). NSC content predicts the process of carbon starvation, which occurs when a plant is unable to supply enough carbohydrates for the metabolic processes necessary for survival, leading to plant mortality ( Weber et al., 2019 ; McDowell et al., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Divergent effects of single and combined stress of drought and salinity on the physiological traits and soil properties of Platycladus orientalis saplings

Li,

Lu,

Wang

et al. 2024

Front. Plant Sci.

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Drought and salinity are two abiotic stresses that affect plant productivity. We exposed 2-year-old Platycladus orientalis saplings to single and combined stress of drought and salinity. Subsequently, the responses of physiological traits and soil properties were investigated. Biochemical traits such as leaf and root phytohormone content significantly increased under most stress conditions. Single drought stress resulted in significantly decreased nonstructural carbohydrate (NSC) content in stems and roots, while single salt stress and combined stress resulted in diverse response of NSC content. Xylem water potential of P. orientalis decreased significantly under both single drought and single salt stress, as well as the combined stress. Under the combined stress of drought and severe salt, xylem hydraulic conductivity significantly decreased while NSC content was unaffected, demonstrating that the risk of xylem hydraulic failure may be greater than carbon starvation. The tracheid lumen diameter and the tracheid double wall thickness of root and stem xylem was hardly affected by any stress, except for the stem tracheid lumen diameter, which was significantly increased under the combined stress. Soil ammonium nitrogen, nitrate nitrogen and available potassium content was only significantly affected by single salt stress, while soil available phosphorus content was not affected by any stress. Single drought stress had a stronger effect on the alpha diversity of rhizobacteria communities, and single salt stress had a stronger effect on soil nutrient availability, while combined stress showed relatively limited effect on these soil properties. Regarding physiological traits, responses of P. orientalis saplings under single and combined stress of drought and salt were diverse, and effects of combined stress could not be directly extrapolated from any single stress. Compared to single stress, the effect of combined stress on phytohormone content and hydraulic traits was negative to P. orientalis saplings, while the combined stress offset the negative effects of single drought stress on NSC content. Our study provided more comprehensive information on the response of the physiological traits and soil properties of P. orientalis saplings under single and combined stress of drought and salt, which would be helpful to understand the adapting mechanism of woody plants to abiotic stress.

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Remobilization of leaf Na+ content and use of nonstructural carbohydrates vary depending on the time when salt stress begins in woody species

Cited by 7 publications

References 42 publications

Comprehensive Transcriptome Analysis Uncovers Distinct Expression Patterns Associated with Early Salinity Stress in Annual Ryegrass (Lolium Multiflorum L.)

Comprehensive Transcriptome Analysis Uncovers Distinct Expression Patterns Associated with Early Salinity Stress in Annual Ryegrass (Lolium Multiflorum L.)

Transcriptome of Cenostigma pyramidale roots, a woody legume, under different salt stress times

Divergent effects of single and combined stress of drought and salinity on the physiological traits and soil properties of Platycladus orientalis saplings

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