New insights into the salt tolerance of the extreme halophytic species Lycium humile (Lycieae, Solanaceae)

Palchetti, María Virginia; Reginato, Mariana; Llanes, Analía; Hornbacher, Johann; Papenbrock, Jutta; Barboza, Gloria Estela; Luna, Virginia; Cantero, Juan José

doi:10.1016/j.plaphy.2021.03.054

Cited by 21 publications

(12 citation statements)

References 58 publications

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“…Indeed, a lower level of JA was positively correlated with the reduced level of ROS under salt stress [ 88 ]. On the other hand, the level of abscisic acid (ABA), which acts as a critical hormone in stomatal closure to reduce transpiration, significantly increased in Lycium humile , S. persica , H. salicornicum and A. tripolium in response to salt stress [ 88 , 91 , 92 , 106 ] ( Table 1 ). Panda et al [ 88 ] reported that enhanced ABA accumulation helped in reduction of oxidative stress in salt-exposed H .…”

Section: Biochemical Mechanisms Associated With Halophyte Adaptation To Salinitymentioning

confidence: 99%

Adaptive Mechanisms of Halophytes and Their Potential in Improving Salinity Tolerance in Plants

Rahman

Mostofa

Keya

et al. 2021

IJMS

110

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Soil salinization, which is aggravated by climate change and inappropriate anthropogenic activities, has emerged as a serious environmental problem, threatening sustainable agriculture and future food security. Although there has been considerable progress in developing crop varieties by introducing salt tolerance-associated traits, most crop cultivars grown in saline soils still exhibit a decline in yield, necessitating the search for alternatives. Halophytes, with their intrinsic salt tolerance characteristics, are known to have great potential in rehabilitating salt-contaminated soils to support plant growth in saline soils by employing various strategies, including phytoremediation. In addition, the recent identification and characterization of salt tolerance-related genes encoding signaling components from halophytes, which are naturally grown under high salinity, have paved the way for the development of transgenic crops with improved salt tolerance. In this review, we aim to provide a comprehensive update on salinity-induced negative effects on soils and plants, including alterations of physicochemical properties in soils, and changes in physiological and biochemical processes and ion disparities in plants. We also review the physiological and biochemical adaptation strategies that help halophytes grow and survive in salinity-affected areas. Furthermore, we illustrate the halophyte-mediated phytoremediation process in salinity-affected areas, as well as their potential impacts on soil properties. Importantly, based on the recent findings on salt tolerance mechanisms in halophytes, we also comprehensively discuss the potential of improving salt tolerance in crop plants by introducing candidate genes related to antiporters, ion transporters, antioxidants, and defense proteins from halophytes for conserving sustainable agriculture in salinity-prone areas.

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Section: Biochemical Mechanisms Associated With Halophyte Adaptation To Salinitymentioning

confidence: 99%

Adaptive Mechanisms of Halophytes and Their Potential in Improving Salinity Tolerance in Plants

Rahman

Mostofa

Keya

et al. 2021

IJMS

110

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“…In this study, according to the phenotype growth of L. barbarum , we found that low concentrations of salt (100 mmol·L −1 NaCl) treatment significantly promote the leaves growth of L. barbarum by increasing the leaves length and width determined by cell division. Low concentrations of salt stress promote the leaf growth of L. barbarum mainly due to long-term adaptations to salt-stressed environments, which already have a variety of heritable adaptive traits that allow them to show some degree of resilience to salt-stressed environments and have developed a high tolerance to salinity ( Mohammed et al., 2021 ; Palchetti et al., 2021 ). More importantly, leaves were thicker in high salt compared to low salt in contrast to the leaf length and width.…”

Section: Discussionmentioning

confidence: 99%

Changes in the morphology traits, anatomical structure of the leaves and transcriptome in Lycium barbarum L. under salt stress

Yao

Meng²,

Zhao³

et al. 2023

Front. Plant Sci.

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Salt stress directly affects the growth of plants. The limitation of leaf grow is among the earliest visible effects of salt stress. However, the regulation mechanism of salt treatments on leaf shape has not been fully elucidated. We measured the morphological traits and anatomical structure. In combination with transcriptome analysis, we analyzed differentially expressed genes (DEGs) and verified the RNA-seq data by qRT-PCR. Finally, we analyzed correlation between leaf microstructure parameters and expansin genes. We show that the leaf thickness, the width, and the leaf length significantly increased at elevated salt concentrations after salt stress for 7 days. Low salt mainly promoted the increase in leaves length and width, but high salt concentration accelerated the leaf thickness. The anatomical structure results indicated that palisade mesophyll tissues contribute more to leaf thickness than spongy mesophyll tissues, which possibly contributed to the increase in leaf expansion and thickness. Moreover, a total of 3,572 DEGs were identified by RNA-seq. Notably, six of the DEGs among 92 identified genes concentrated on cell wall synthesis or modification were involved in cell wall loosening proteins. More importantly, we demonstrated that there was a strong positive correlation between the upregulated EXLA2 gene and the thickness of the palisade tissue in L. barbarum leaves. These results suggested that salt stress possibly induced the expression of EXLA2 gene, which in turn increased the thickness of L. barbarum leaves by promoting the longitudinal expansion of cells of the palisade tissue. This study lays a solid knowledge for revealing the underlying molecular mechanisms of leaf thickening in L. barbarum in response to salt stresses.

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“…It seems that several accessions of T. fragiferum employed this mechanism, especially, at low to moderate salinity ( Figure 6 ). The relationship between salinity tolerance and salinity-induced tissue succulence has been shown for a number of species [ 37 , 38 , 39 , 40 ]. However, no such relationship was evident for T. fragiferum , as relatively salt tolerant accession TF1 showed only relatively little increase of tissue water content in comparison to that in other accessions ( Figure 6 ).…”

Section: Discussionmentioning

confidence: 99%

Effect of Salinity on Growth, Ion Accumulation and Mineral Nutrition of Different Accessions of a Crop Wild Relative Legume Species, Trifolium fragiferum

Jēkabsone

Andersone-Ozola

Karlsons

et al. 2022

Plants

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Crop wild relatives represent a valuable resource for the breeding of new crop varieties suitable for sustainable productivity in conditions of climate change. The aim of the present study was to assess salt tolerance of several wild accessions of T. fragiferum from habitats with different salinity levels in controlled conditions. Decrease of plant biomass and changes in partitioning between different organs was a characteristic response of plants with increasing substrate salinity, but these responses were genotype-specific. In several accessions, salinity stimulated reproductive development. The major differences in salinity responses between various T. fragiferum genotypes were at the level of dry biomass accumulation as well as water accumulation in plant tissues, resulting in relatively more similar effect on fresh mass. Na+ and Cl− accumulation capacity were organ-specific, with leaf petioles accumulating more, followed by leaf blades and stolons. Responses of mineral nutrition clearly were both genotype- and organ-specific, but several elements showed a relatively general pattern, such as increase in Zn concentration in all plant parts, and decrease in Ca and Mg concentration. Alterations in mineralome possibly reflect a reprogramming of the metabolism to adapt to changes in growth, morphology and ion accumulation resulting from effect of NaCl. High intraspecies morphological and physiological variability in responses of T. fragiferum accessions to salinity allow to describe them as ecotypes.

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New insights into the salt tolerance of the extreme halophytic species Lycium humile (Lycieae, Solanaceae)

Cited by 21 publications

References 58 publications

Adaptive Mechanisms of Halophytes and Their Potential in Improving Salinity Tolerance in Plants

Adaptive Mechanisms of Halophytes and Their Potential in Improving Salinity Tolerance in Plants

Changes in the morphology traits, anatomical structure of the leaves and transcriptome in Lycium barbarum L. under salt stress

Effect of Salinity on Growth, Ion Accumulation and Mineral Nutrition of Different Accessions of a Crop Wild Relative Legume Species, Trifolium fragiferum

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