Comparative transcriptome analysis reveals K+ transporter gene contributing to salt tolerance in eggplant

Li, Jing; Gao, Zhen; Zhou, Lu; Li, Linzhi; Zhang, Junhao; Liu, Yang; Chen, Huoying

doi:10.1186/s12870-019-1663-8

Cited by 32 publications

(21 citation statements)

References 84 publications

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“…Comparative genomics has been extensively used to investigate the genetic bases of adaptation to extreme environments [6,7,9,10,14,[28][29][30][31]. In this study, comprehensive transcriptome analyses from leaves and roots of S. alba across salinity conditions were performed to probe the genetic mechanisms underlying salt adaptation.…”

Section: Discussionmentioning

confidence: 99%

Molecular adaptation to salinity fluctuation in tropical intertidal environments of a mangrove tree Sonneratia alba

Feng

et al. 2020

BMC Plant Biol

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Background: Mangroves have adapted to intertidal zones-the interface between terrestrial and marine ecosystems. Various studies have shown adaptive evolution in mangroves at physiological, ecological, and genomic levels. However, these studies paid little attention to gene regulation of salt adaptation by transcriptome profiles. Results: We sequenced the transcriptomes of Sonneratia alba under low (fresh water), medium (half the seawater salinity), and high salt (seawater salinity) conditions and investigated the underlying transcriptional regulation of salt adaptation. In leaf tissue, 64% potential salinity-related genes were not differentially expressed when salinity increased from freshwater to medium levels, but became up-or down-regulated when salt concentrations further increased to levels found in sea water, indicating that these genes are well adapted to the medium saline condition. We inferred that both maintenance and regulation of cellular environmental homeostasis are important adaptive processes in S. alba. i) The sulfur metabolism as well as flavone and flavonol biosynthesis KEGG pathways were significantly enriched among up-regulated genes in leaves. They are both involved in scavenging ROS or synthesis and accumulation of osmosis-related metabolites in plants. ii) There was a significantly increased percentage of transcription factor-encoding genes among up-regulated transcripts. High expressions of salt tolerance-related TF families were found under high salt conditions. iii) Some genes up-regulated in response to salt treatment showed signs of adaptive evolution at the amino acid level and might contribute to adaptation to fluctuating intertidal environments. Conclusions: This study first elucidates the mechanism of high-salt adaptation in mangroves at the whole-transcriptome level by salt gradient experimental treatments. It reveals that several candidate genes (including salt-related genes, TFencoding genes, and PSGs) and major pathways are involved in adaptation to high-salt environments. Our study also provides a valuable resource for future investigation of adaptive evolution in extreme environments.

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Section: Discussionmentioning

confidence: 99%

Molecular adaptation to salinity fluctuation in tropical intertidal environments of a mangrove tree Sonneratia alba

Feng

et al. 2020

BMC Plant Biol

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“…Li et al . 37 examined a salt tolerant and salt sensitive eggplant cultivar under 200 mM NaCl. They observed that the salt tolerant cultivar had a higher K/Na ratio in the leaves as well as upregulation of seven genes related to K + transport.…”

Section: Discussionmentioning

confidence: 99%

Impact of Grafting, Salinity and Irrigation Water Composition on Eggplant Fruit Yield and Ion Relations

Semiz

Suarez

2019

Sci Rep

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Scarcity of fresh water in arid and semi-arid regions means that we must use more saline waters for irrigation and develop tools to improve crop salt tolerance. The objectives of our study were to (1) Evaluate fruit production, salt tolerance and ion composition of eggplant cv Angela, both nongrafted and when grafted on tomato cv Maxifort rootstock and (2) Evaluate eggplant specific toxicity effect of Cl− and Na+ ions under saline conditions. We salinized the irrigation water with either a Na+-Ca2+- Cl− composition typical of coastal Mediterranean ground waters as well as a mixed Na+-Ca2+-SO42− Cl− type water, a composition more typical of interior continental basin ground. For each water type we evaluated 5 different salinity (osmotic) levels of –0.003 (control), –0.15, –0.30, –0.45 and –0.60 MPa. There were no statistically significant differences in the fruit yield relative to the water type, indicating that Cl− ion toxicity is not a major factor in eggplant yield associated with salinity. This conclusion was confirmed by the determination that leaf Cl content was not correlated with relative yield. The electrical conductivity of the saturation extract (ECe) at which yield is predicted to be reduced by 50% was 4.6 dS m−1 for the grafted plants vs. 1.33 dS m−1 for the nongrafted plants. The relative yield was very well correlated to leaf Na concentrations regardless of grafting status, indicating that Na is the toxic ion responsible for eggplant yield loss under saline conditions. The increased salt tolerance of cv Angela eggplant when grafted onto tomato Maxifort rootstock is attributed to a reduced Na uptake and increased Ca and K uptake with Maxifort rootstock.

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“…Heterologous expression of SmAKT1 enhances the salt tolerance of yeast and Arabidopsis akt1 mutants. 27 Salt stress transcriptome analysis of Salix demonstrated that the upregulated genes were mainly involved in plant hormone pathways and β-alanine, galactose and betalain metabolism. ETH was found to be the primary signaling molecule that activated TF for 12 hours under salt stress.…”

Section: Salinity and Heavy Metal Stressmentioning

confidence: 99%

Advances in Transcriptomics in the Response to Stress in Plants

Wang

Li²,

et al. 2020

Global Medical Genetics

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Adverse stress influences the normal growth and development of plants. With the development of molecular biology technology, understanding the molecular mechanism of plants in response to adverse stress has gradually become an important topic for academic exploration. The expression of the transcriptome is dynamic, which reflects the level of expression of all genes in a particular cell, tissue, or organ of an individual organism at a particular stage of growth and development. Transcriptomics can disclose the expression at the whole genome level under stress from the whole transcriptional level, which can be useful in understanding the complex regulatory network associated with the adaptability and tolerance of plants to stress. In this article, we review the application of transcriptomics in understanding the response of plants to biotic stresses such as diseases and insect infestation and abiotic stresses such as water, temperature, salt, and heavy metals to provide a guideline for related research.

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Comparative transcriptome analysis reveals K+ transporter gene contributing to salt tolerance in eggplant

Cited by 32 publications

References 84 publications

Molecular adaptation to salinity fluctuation in tropical intertidal environments of a mangrove tree Sonneratia alba

Molecular adaptation to salinity fluctuation in tropical intertidal environments of a mangrove tree Sonneratia alba

Impact of Grafting, Salinity and Irrigation Water Composition on Eggplant Fruit Yield and Ion Relations

Advances in Transcriptomics in the Response to Stress in Plants

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