Insights into salt tolerance from the genome of
            <i>Thellungiella salsuginea</i>

Wu, Hua‐Jun; Zhang, Zhonghui; Wang, Junyi; Oh, Dong-Ha; Dassanayake, Maheshi; Liu, Binghang; Huang, Quanfei; Sun, Hai‐Xi; R, Xia; Wu, Yaorong; Wang, Yinan; Zhao, Yang; Liu, Yang; Zhang, Wan–Ke; Zhang, Huawei; Chu, Jinfang; Yan, Cunyu; Fang, S. S.; Zhang, Jinsong; Wang, Yiqin; Zhang, Fengxia; Wang, Guodong; Lee, Sang Yeol; Cheeseman, John M.; Yang, Bicheng; Li, Bo; Jiang, Min; Yang, L.; Wang, Jun; Chu, Chengcai; Chen, Shouyi; Bohnert, Hans J.; Zhu, Jian‐Kang; Wang, Xiu‐Jie; Xie, Qi

doi:10.1073/pnas.1209954109

Cited by 259 publications

(259 citation statements)

References 43 publications

Supporting

Mentioning

249

Contrasting

Unclassified

Order By: Relevance

“…2 and Supplementary Tables S23-S26). In this regard, the Na þ /K þ transporter HKT1 is of particular interest, because it is similarly expanded as tandem duplicated copies in both T. parvula 16 and T. salsuginea 43 . Further functional analysis of this gene family is needed to understand its critical role in salt tolerance in plants.…”

Section: Discussionmentioning

confidence: 99%

“…Numerous studies have been conducted on the genetic and molecular mechanisms underlying salt tolerance in plants 18,19,30,31 , and have included genomic analyses of the extremophiles Thellungiella parvula 16 and T. salsuginea 43 . However, our current understanding of these aspects of salt tolerance remains limited, especially for woody plants 22,27 .…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Genomic insights into salt adaptation in a desert poplar

et al. 2013

Self Cite

View full text Add to dashboard Cite

Despite the high economic and ecological importance of forests, our knowledge of the genomic evolution of trees under salt stress remains very limited. Here we report the genome sequence of the desert poplar, Populus euphratica, which exhibits high tolerance to salt stress. Its genome is very similar and collinear to that of the closely related mesophytic congener, P. trichocarpa. However, we find that several gene families likely to be involved in tolerance to salt stress contain significantly more gene copies within the P. euphratica lineage. Furthermore, genes showing evidence of positive selection are significantly enriched in functional categories related to salt stress. Some of these genes, and others within the same categories, are significantly upregulated under salt stress relative to their expression in another salt-sensitive poplar. Our results provide an important background for understanding tree adaptation to salt stress and facilitating the genetic improvement of cultivated poplars for saline soils.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Genomic insights into salt adaptation in a desert poplar

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…Despite the caveats noted above concerning stress durations and intensities, this result suggests that adaptation to combined salt and heat stresses is more difficult than adaptation to the other combined stresses assessed here. Nonetheless, such a conclusion may only apply to temperate plants with similar ecologies to Arabidopsis, given the extent of adaptive diversity in related plants such as the halophyte Thellungiella salsuginea (Wu et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Transcriptome Responses to Combinations of Stresses in Arabidopsis

et al. 2013

View full text Add to dashboard Cite

Biotic and abiotic stresses limit agricultural yields, and plants are often simultaneously exposed to multiple stresses. Combinations of stresses such as heat and drought or cold and high light intensity have profound effects on crop performance and yields. Thus, delineation of the regulatory networks and metabolic pathways responding to single and multiple concurrent stresses is required for breeding and engineering crop stress tolerance. Many studies have described transcriptome changes in response to single stresses. However, exposure of plants to a combination of stress factors may require agonistic or antagonistic responses or responses potentially unrelated to responses to the corresponding single stresses. To analyze such responses, we initially compared transcriptome changes in 10 Arabidopsis (Arabidopsis thaliana) ecotypes using cold, heat, high-light, salt, and flagellin treatments as single stress factors as well as their double combinations. This revealed that some 61% of the transcriptome changes in response to double stresses were not predictable from the responses to single stress treatments. It also showed that plants prioritized between potentially antagonistic responses for only 5% to 10% of the responding transcripts. This indicates that plants have evolved to cope with combinations of stresses and, therefore, may be bred to endure them. In addition, using a subset of this data from the Columbia and Landsberg erecta ecotypes, we have delineated coexpression network modules responding to single and combined stresses.

show abstract

“…Thellungiella salsuginea, an extremophile closely related to Arabidopsis, has 28 Hsfs, supporting the importance of this transcription factor family in abiotic stress responses (55). A previous transcriptomic study revealed the involvement of HsfB2b in the necrotrophic pathogen response, but the direct molecular target of HsfB2b is in the corresponding signaling pathway(s) remains unclear (26).…”

Section: Discussionmentioning

confidence: 99%

HsfB2b-mediated repression ofPRR7directs abiotic stress responses of the circadian clock

Kolmos

Chow

Pruneda‐Paz

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

The circadian clock perceives environmental signals to reset to local time, but the underlying molecular mechanisms are not well understood. Here we present data revealing that a member of the heat shock factor (Hsf) family is involved in the input pathway to the plant circadian clock. Using the yeast one-hybrid approach, we isolated several Hsfs, including HEAT SHOCK FACTOR B2b (HsfB2b), a transcriptional repressor that binds the promoter of PSEUDO RESPONSE REGULATOR 7 (PRR7) at a conserved binding site. The constitutive expression of HsfB2b leads to severely reduced levels of the PRR7 transcript and late flowering and elongated hypocotyls. HsfB2b function is important during heat and salt stress because HsfB2b overexpression sustains circadian rhythms, and the hsfB2b mutant has a short circadian period under these conditions. HsfB2b is also involved in the regulation of hypocotyl growth under warm, short days. Our findings highlight the role of the circadian clock as an integrator of ambient abiotic stress signals important for the growth and fitness of plants.circadian clock | Hsf | heat compensation | salt tolerance T he circadian clock is an endogenous timing mechanism that ensures that daily rhythmic processes are synchronized with the environment. The circadian oscillator runs with a period of ∼24 h. It entrains to environmental signals, such as light and temperature, and in this way is able to anticipate daily environmental changes (1). Molecular genetics and modeling have revealed that the circadian system comprises several interconnected feedback loops involving multiple phase-specific gene products (2).In the model plant Arabidopsis, the morning feedback loops are composed of the major oscillator proteins CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) and LATE ELONGATED HYPOCOTYL (LHY), which peak in abundance at dawn and activate the expression of early-late morning genes PSEUDO RESPONSE REGULATOR 9 (PRR9) and PRR7 (3). Pseudoresponse regulator (PRR) proteins are transcriptional repressors, and PRR9 and PRR7 close the morning loops by binding to the CCA1 and LHY promoters (4). The transcription of PRR9 is acutely activated by light, a feature that is not shared by PRR7 (3, 5). Disruption of either locus results in a mild clock phenotype, including an increased clock period of ∼1 h and an elongated hypocotyl (6-8). The double loss-of-function mutant exhibits a strong synergistic phenotype with free-running period lengths of up to 35 h and loss of temperature entrainment and compensation, indicating overlapping roles for PRR9 and PRR7 (3, 9, 10).The ambient environment influences the circadian clock in a number of different ways. Although the most well-studied input cue is light, temperature is a major zeitgeber as well (11). Brief pulses (from minutes to hours, depending on the intensity) result in acute responses from the clock. Importantly, the severity of such responses is time-dependent and gated by the oscillator (12-14). Longer durations of zeitgeber change can function as an entrainment signal and general...

show abstract

Insights into salt tolerance from the genome of Thellungiella salsuginea

Cited by 259 publications

References 43 publications

Genomic insights into salt adaptation in a desert poplar

Genomic insights into salt adaptation in a desert poplar

Transcriptome Responses to Combinations of Stresses in Arabidopsis

HsfB2b-mediated repression ofPRR7directs abiotic stress responses of the circadian clock

Contact Info

Product

Resources

About