The yield difference between wild-type cotton and transgenic cotton that expresses IPT depends on when water-deficit stress is applied

Zhu, Xunlu; Sun, Li; Kuppu, Sundaram; Hu, Rongbin; Mishra, Neelam; Smith, Jennifer; Esmaeili, Nardana; Herath, Maheshika; Gore, Michael A.; Payton, Paxton; Shen, Guoxin; Zhang, Hong

doi:10.1038/s41598-018-20944-7

Cited by 36 publications

(24 citation statements)

References 21 publications

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“…Overexpression of the Arabidopsis AtEDT1/HDG11 (enhanced drought tolerance 1/homeodomain glabrous 11) gene resulted in enhanced proline content, more dynamic ROS scavenging activity, an extensive rooting system, and improved drought tolerance in cotton [145]. Another study highlighted the performance of transgenic cotton carrying the IPT gene, as it has better drought tolerance, in the event of stress prior to flowering stage [146]. Ectopic endogenous and exogenous overexpression of two abiotic stress-responsive TF orthologs (bZIP AREB/ABF) from Gossypium hirsutum, GhABF2D and Arabidopsis AtABF3 were studied.…”

Section: Application Of Genome-modification Approaches To Achieve Dromentioning

confidence: 99%

Insights into Drought Stress Signaling in Plants and the Molecular Genetic Basis of Cotton Drought Tolerance

Mahmood

Khalid

Abdullah

et al. 2019

Cells

233

141

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Drought stress restricts plant growth and development by altering metabolic activity and biological functions. However, plants have evolved several cellular and molecular mechanisms to overcome drought stress. Drought tolerance is a multiplex trait involving the activation of signaling mechanisms and differentially expressed molecular responses. Broadly, drought tolerance comprises two steps: stress sensing/signaling and activation of various parallel stress responses (including physiological, molecular, and biochemical mechanisms) in plants. At the cellular level, drought induces oxidative stress by overproduction of reactive oxygen species (ROS), ultimately causing the cell membrane to rupture and stimulating various stress signaling pathways (ROS, mitogen-activated-protein-kinase, Ca2+, and hormone-mediated signaling). Drought-induced transcription factors activation and abscisic acid concentration co-ordinate the stress signaling and responses in cotton. The key responses against drought stress, are root development, stomatal closure, photosynthesis, hormone production, and ROS scavenging. The genetic basis, quantitative trait loci and genes of cotton drought tolerance are presented as examples of genetic resources in plants. Sustainable genetic improvements could be achieved through functional genomic approaches and genome modification techniques such as the CRISPR/Cas9 system aid the characterization of genes, sorted out from stress-related candidate single nucleotide polymorphisms, quantitative trait loci, and genes. Exploration of the genetic basis for superior candidate genes linked to stress physiology can be facilitated by integrated functional genomic approaches. We propose a third-generation sequencing approach coupled with genome-wide studies and functional genomic tools, including a comparative sequenced data (transcriptomics, proteomics, and epigenomic) analysis, which offer a platform to identify and characterize novel genes. This will provide information for better understanding the complex stress cellular biology of plants.

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Section: Application Of Genome-modification Approaches To Achieve Dromentioning

confidence: 99%

Insights into Drought Stress Signaling in Plants and the Molecular Genetic Basis of Cotton Drought Tolerance

Mahmood

Khalid

Abdullah

et al. 2019

Cells

233

141

View full text Add to dashboard Cite

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“…As drought responses of CK metabolic genes vary by tissue types and the exposure time, future functional studies should provide a full inventory of CK metabolic genes, in relation to tissue-specific and spatially inducible expression, to reveal any additional roles of these genes in plant drought tolerance. In fact, there have been several studies demonstrating improved yield under drought conditions by modulating CK homeostasis, either via CK biosynthetic IPT GFMs [38,79] or CK degradation CKX GFMs [80].…”

Section: Response Of Ck Metabolic Genes To Droughtmentioning

confidence: 99%

Role and Regulation of Cytokinins in Plant Response to Drought Stress

Hải

Chuong

et al. 2020

Plants

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Cytokinins (CKs) are key phytohormones that not only regulate plant growth and development but also mediate plant tolerance to drought stress. Recent advances in genome-wide association studies coupled with in planta characterization have opened new avenues to investigate the drought-responsive expression of CK metabolic and signaling genes, as well as their functions in plant adaptation to drought. Under water deficit, CK signaling has evolved as an inter-cellular communication network which is essential to crosstalk with other types of phytohormones and their regulating pathways in mediating plant stress response. In this review, we revise the current understanding of CK involvement in drought stress tolerance. Particularly, a genetic framework for CK signaling and CK crosstalk with abscisic acid (ABA) in the precise monitoring of drought responses is proposed. In addition, the potential of endogenous CK alteration in crops towards developing drought-tolerant crops is also discussed.

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“…It is well known that unintended effects in GE plants can be triggered by changing environmental conditions or biotic and abiotic stressors [30,[58][59][60][61][62][63]. There are several reasons why GE plants show unexpected effects in their interaction with the environment.…”

Section: Changes In Fitness Can Be Triggered By Genome × Environmentamentioning

confidence: 99%

Risk assessment of genetically engineered plants that can persist and propagate in the environment

Bauer-Panskus¹,

Miyazaki²,

Kawall³

et al. 2020

Environ Sci Eur

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New challenges arise in risk assessment when genetically engineered (GE) plants can persist and propagate in the environment as well as produce viable offspring. Next generation effects can be influenced by heterogeneous genetic backgrounds and unexpected effects can be triggered in interaction with environmental conditions. Consequently, the biological characteristics of the original events cannot be regarded as sufficient to conclude on hazards that may emerge in following generations. Potential hazards identified by the European Food Safety Authority (EFSA) include exacerbating weed problems, displacement and even extinction of native plant species. However, there are reasons for concern that might escape the environmental risk assessment (ERA) because EFSA only takes into account the characteristics of the original events, leaving aside unintended or unexpected next generation effects emerging from spontaneous propagation and gene flow. From our review of the publications available and the analysis of risk assessment as performed, we conclude that the risk assessment of GE organisms able to persist and spontaneously propagate in the environment actually suffers from a high degree of spatio-temporal complexity causing many uncertainties. To deal with this problem, we recommend establishing 'cut-off criteria' in risk assessment that include factual limits of knowledge. It is proposed that these criteria are applied in a specific step within risk assessment, i.e. 'spatio-temporal controllability' that uses well-defined biological characteristics to delineate some of the boundaries between known and unknowns. This additional step in risk assessment will foster robustness in the process and can substantially benefit the reliability and overall conclusiveness of risk assessment and decision-making on potential releases.

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The yield difference between wild-type cotton and transgenic cotton that expresses IPT depends on when water-deficit stress is applied

Cited by 36 publications

References 21 publications

Insights into Drought Stress Signaling in Plants and the Molecular Genetic Basis of Cotton Drought Tolerance

Insights into Drought Stress Signaling in Plants and the Molecular Genetic Basis of Cotton Drought Tolerance

Role and Regulation of Cytokinins in Plant Response to Drought Stress

Risk assessment of genetically engineered plants that can persist and propagate in the environment

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