Evolutionary variation and expression profiling of Isopentenyl transferase gene family in Arabidopsis thaliana L. and Oryza sativa L.

Ghosh, Ajit; Shah, Nur Ahad; Jui, Zakya Sultana; Saha, Sushanto; Fariha, Khandakar Atkia; Islam, Tahmina

doi:10.1016/j.plgene.2018.06.002

Cited by 28 publications

(27 citation statements)

References 67 publications

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“…Interestingly, nine IPT GFMs in Arabidopsis encode eleven IPT proteins. It has been found that AtIPT9 has three alternative splicings, suggesting that AtIPT9 could be a remarkable candidate for further studies on CK homeostasis [64]. Among those GFMs, AtIPT3 and AtPT9 expression was down regulated under drought conditions [64].…”

Section: Response Of Ck Metabolic Genes To Droughtmentioning

confidence: 99%

“…It has been found that AtIPT9 has three alternative splicings, suggesting that AtIPT9 could be a remarkable candidate for further studies on CK homeostasis [64]. Among those GFMs, AtIPT3 and AtPT9 expression was down regulated under drought conditions [64]. Since the application of whole-genome sequencing to a wider range of plant species, the IPT family has been successfully identified and annotated, with 9 members in maize [35], 14 members in soybean (Glycine max) [65], 10 members in rice (Oryza sativa) [66], and 12 members in apple (Malus domestica) [67].…”

Section: Response Of Ck Metabolic Genes To Droughtmentioning

confidence: 99%

“…An increasing number of investigations focus on the participation of IPT genes in the regulation of plant defense response to water deficit in crop species. For instance, IPT transcript abundance was reported to be associated with dehydration and drought stress conditions, during both vegetative and reproductive stages in soybean [65], cabbage (Brassica rapa) [68] and rice [64]. Unlike in Arabidopsis, a total of 10 IPT GFMs in rice encode 10 IPT proteins with no alternatively spliced isoforms.…”

Section: Response Of Ck Metabolic Genes To Droughtmentioning

confidence: 99%

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Role and Regulation of Cytokinins in Plant Response to Drought Stress

Hải

Chuong

et al. 2020

Plants

103

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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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Section: Response Of Ck Metabolic Genes To Droughtmentioning

confidence: 99%

Section: Response Of Ck Metabolic Genes To Droughtmentioning

confidence: 99%

Section: Response Of Ck Metabolic Genes To Droughtmentioning

confidence: 99%

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Role and Regulation of Cytokinins in Plant Response to Drought Stress

Hải

Chuong

et al. 2020

Plants

103

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“…Studies in other angiosperms have observed similar findings. In rice, salinity suppressed, whereas cold or drought stress enhanced the expression of most ATP/ADP-IPT genes 47 . In Arabidopsis, the expression patterns of ATP/ADP-IPT genes under stress conditions were also differentially regulated in shoots and roots 47 .…”

Section: Proposed Roles In Angiospermsmentioning

confidence: 99%

“…In rice, salinity suppressed, whereas cold or drought stress enhanced the expression of most ATP/ADP-IPT genes 47 . In Arabidopsis, the expression patterns of ATP/ADP-IPT genes under stress conditions were also differentially regulated in shoots and roots 47 . Moreover, the tZ-type CKs that are produced by ATP/ADP-IPT vary upon environmental stress, depending on the type and intensity of the stress treatment 40 .…”

Section: Proposed Roles In Angiospermsmentioning

confidence: 99%

Evolution and roles of cytokinin genes in angiosperms 1: Do ancient IPTs play housekeeping while non-ancient IPTs play regulatory roles?

Wang

Liu

et al. 2020

Hortic Res

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Isopentenyltransferase (IPT) genes, including those encoding ATP/ADP-IPTs and tRNA-IPTs, control the rate-limiting steps of the biosynthesis of N 6-(Δ 2-isopentenyl)adenine (iP)-type and trans-zeatin (tZ)-type cytokinins and cis-zeatin (cZ)-type cytokinins, respectively. However, the evolution and roles of these IPTs in angiosperms are not well understood. Here, we report comprehensive analyses of the origins, evolution, expression patterns, and possible roles of ATP/ADP-IPTs and tRNA-IPTs in angiosperms. We found that Class I and II tRNA-IPTs likely coexisted in the last common ancestor of eukaryotes, while ATP/ADP-IPTs likely originated from a Class II tRNA-IPT before the divergence of angiosperms. tRNA-IPTs are conservatively retained as 2-3 copies, but ATP/ADP-IPTs exhibit considerable expansion and diversification. Additionally, tRNA-IPTs are constitutively expressed throughout the plant, whereas the expression of ATP/ADP-IPTs is tissue-specific and rapidly downregulated by abiotic stresses. Furthermore, previous studies and our present study indicate that ATP/ADP-IPTs and their products, iPs/tZs, may regulate responses to environmental stresses and organ development in angiosperms. We therefore hypothesize that tRNA-IPTs and the associated cZs play a housekeeping role, whereas ATP/ADP-IPTs and the associated iP/tZ-type cytokinins play regulatory roles in organ development and stress responses in angiosperms, which echoes the conclusions and hypothesis presented in the accompanying study by Wang, X. et al Evolution and roles of cytokinin genes in angiosperms 2: Do ancient CKXs play housekeeping roles while non-ancient CKXs play regulatory roles? Hortic Res

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Metabolic engineering of crocins and picrocrocin apocarotenoids in potato group phureja

Gómez‐Gómez,

López‐Jimenez,

Martinez Fajardo

et al. 2024

Engineering Reports

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The stigmas of Crocus sativus accumulate the exclusive apocarotenoids crocin and picrocrocin, which are dried and desiccated to make commercial saffron. In addition to providing characteristic organoleptic qualities, saffron apocarotenoids are valuable compounds in the pharmaceutical and health industries. Previously, we developed Desirée potato tubers enriched with these apocarotenoids which also showed increased potential benefits for human health. In the current study, Solanum tuberosum (S. tuberosum) Group Phureja 01H15 which accumulates high levels of zeaxanthin, was engineered to produce saffron apocarotenoids to increase the levels of these metabolites in potato tubers using a construct namely O6, which contains the CsCCD2L, UGT74AD1, and UGT709G1 genes necessary for the biosynthesis of crocin and picrocrocin under the control of the patatin promoter. Here, we obtained transgenic S. tuberosum Group Phureja 01H15 lines with high concentrations of crocins and picrocrocin (up to 3.648 mg/g DW, 2.345 mg/g DW, respectively), which were up to 10 and 3 times higher than those obtained in the Desirée background, respectively. Furthermore, we performed transcriptome analyses of tubers from Desirée and 01H15 wild type and carrying O6 construct. Differentially expressed gene analysis revealed transcript changes not only on tuber carotenoid and apocarotenoid genes but also in other related pathways, suggesting a possible role in isoprenoid metabolism remodeling. Thus, this heterologous system serves as a robust platform for the production of these valuable metabolites.

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Evolutionary variation and expression profiling of Isopentenyl transferase gene family in Arabidopsis thaliana L. and Oryza sativa L.

Cited by 28 publications

References 67 publications

Role and Regulation of Cytokinins in Plant Response to Drought Stress

Role and Regulation of Cytokinins in Plant Response to Drought Stress

Evolution and roles of cytokinin genes in angiosperms 1: Do ancient IPTs play housekeeping while non-ancient IPTs play regulatory roles?

Metabolic engineering of crocins and picrocrocin apocarotenoids in potato group phureja

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