A Petunia Homeodomain-Leucine Zipper Protein, PhHD-Zip, Plays an Important Role in Flower Senescence

Chang, Xiaoxiao; Donnelly, Linda; Sun, Daoyang; Rao, Jingping; Reid, Michael S.; Jiang, Cai‐Zhong

doi:10.1371/journal.pone.0088320

Cited by 46 publications

(41 citation statements)

References 58 publications

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“…In the petunia flowers, expression profiles of the ETHYLENE RESPONSE FACTOR ( ERF ) transcription factor family genes were studied in detail (Liu et al, 2011) and these transcription factors appear to be associated with corolla senescence. Recently, silencing an ERF petunia transcription factor homeodomain-leucine zipper protein ( PhHD-Zip ) dramatically reduced ethylene production and the abundance of transcripts of genes involved in ethylene ( ACS , ACO ) and led to an increase in flower longevity (Chang et al, 2014). …”

Section: Flower Senescencementioning

confidence: 99%

“…On the other hand, ABA negatively affected the ethylene biosynthetic pathway and in hibiscus ( Hibiscus rosa-sinensis ) tissue sensitivity in all flower tissues, reducing the transcript abundance of HrsACS , HrsACO , HrsETR , and HrsERS when exogenously applied (Trivellini et al, 2011a). The over-expression of PhHD-Zip accelerated petunia flower senescence and this condition is another example highlighting the interaction of different hormones (Chang et al, 2014). In fact, PhHD-Zip transcript abundance in petunia flowers was increased by the application of hormones (ethylene, ABA) and the transcript abundance of 9- cis -epoxycarotenoid dioxygenase ( NCED ), a key enzyme in the ABA biosynthesis pathway, was in contrast in PhHD-Zip silenced flowers.…”

Section: Flower Senescencementioning

confidence: 99%

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Ethylene Role in Plant Growth, Development and Senescence: Interaction with Other Phytohormones

et al. 2017

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The complex juvenile/maturity transition during a plant’s life cycle includes growth, reproduction, and senescence of its fundamental organs: leaves, flowers, and fruits. Growth and senescence of leaves, flowers, and fruits involve several genetic networks where the phytohormone ethylene plays a key role, together with other hormones, integrating different signals and allowing the onset of conditions favorable for stage progression, reproductive success and organ longevity. Changes in ethylene level, its perception, and the hormonal crosstalk directly or indirectly regulate the lifespan of plants. The present review focused on ethylene’s role in the development and senescence processes in leaves, flowers and fruits, paying special attention to the complex networks of ethylene crosstalk with other hormones. Moreover, aspects with limited information have been highlighted for future research, extending our understanding on the importance of ethylene during growth and senescence and boosting future research with the aim to improve the qualitative and quantitative traits of crops.

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Section: Flower Senescencementioning

confidence: 99%

Section: Flower Senescencementioning

confidence: 99%

Ethylene Role in Plant Growth, Development and Senescence: Interaction with Other Phytohormones

et al. 2017

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“…In rose, two HD-Zip proteins, RhHB1 and RhHB6, regulate petal senescence positively and negatively, respectively [39,40]. In petunia, PhHD-Zip regulates petal senescence by promoting ABA biosynthesis [41].…”

Section: Transcription Factors and Protein Kinasesmentioning

confidence: 99%

Proteome and Ubiquitome Changes during Rose Petal Senescence

Lü

Fan

et al. 2019

IJMS

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Petal senescence involves numerous programmed changes in biological and biochemical processes. Ubiquitination plays a critical role in protein degradation, a hallmark of organ senescence. Therefore, we investigated changes in the proteome and ubiquitome of senescing rose (Rosa hybrida) petals to better understand their involvement in petal senescence. Of 3859 proteins quantified in senescing petals, 1198 were upregulated, and 726 were downregulated during senescence. We identified 2208 ubiquitinated sites, including 384 with increased ubiquitination in 298 proteins and 1035 with decreased ubiquitination in 674 proteins. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses revealed that proteins related to peptidases in proteolysis and autophagy pathways were enriched in the proteome, suggesting that protein degradation and autophagy play important roles in petal senescence. In addition, many transporter proteins accumulated in senescing petals, and several transport processes were enriched in the ubiquitome, indicating that transport of substances is associated with petal senescence and regulated by ubiquitination. Moreover, several components of the brassinosteroid (BR) biosynthesis and signaling pathways were significantly altered at the protein and ubiquitination levels, implying that BR plays an important role in petal senescence. Our data provide a comprehensive view of rose petal senescence at the posttranslational level.

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“…There are 17 HD-ZIP I proteins in Arabidopsis and 14 in rice; however, only a few have been characterized (Henriksson et al, 2005;Agalou et al, 2008;Harris et al, 2011). Members of HD-ZIP I increase plant plasticity by mediating external signals and regulating growth in response to environmental conditions (Wang et al, 2003;Lin et al, 2008;Manavella et al, 2008;Brandt et al, 2014;Chang et al, 2014;Zhao et al, 2014;Capella et al, 2015). For example, Arabidopsis HB7 and HB12 encode potential regulators of growth in response to water deficit (Olsson et al, 2004;Valdés et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Rice HOX12 Regulates Panicle Exsertion by Directly Modulating the Expression of ELONGATED UPPERMOST INTERNODE1

Gao

Fang

et al. 2016

Plant Cell

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Bioactive gibberellins (GAs) are key endogenous regulators of plant growth. Previous work identified ELONGATED UPPERMOST INTERNODE1 (EUI1) as a GA-deactivating enzyme that plays an important role in panicle exsertion from the flag leaf sheath in rice (Oryza sativa). However, the mechanism that regulates EUI1 activity during development is still largely unexplored. In this study, we identified the dominant panicle enclosure mutant regulator of eui1 (ree1-D), whose phenotype is caused by the activation of the homeodomain-leucine zipper transcription factor HOX12. Diminished HOX12 expression by RNA interference enhanced panicle exsertion, mimicking the eui1 phenotype. HOX12 knockdown plants contain higher levels of the major biologically active GAs (such as GA 1 and GA 4 ) than the wild type. The expression of EUI1 is elevated in the ree1-D mutant but reduced in HOX12 knockdown plants. Interestingly, both HOX12 and EUI1 are predominantly expressed in panicles, where GA 4 is highly accumulated. Yeast one-hybrid, electrophoretic mobility shift assay, and chromatin immunoprecipitation analyses showed that HOX12 physically interacts with the EUI1 promoter both in vitro and in vivo. Furthermore, plants overexpressing HOX12 in the eui1 mutant background retained the elongated uppermost internode phenotype. These results indicate that HOX12 acts directly through EUI1 to regulate panicle exsertion in rice.

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A Petunia Homeodomain-Leucine Zipper Protein, PhHD-Zip, Plays an Important Role in Flower Senescence

Cited by 46 publications

References 58 publications

Ethylene Role in Plant Growth, Development and Senescence: Interaction with Other Phytohormones

Ethylene Role in Plant Growth, Development and Senescence: Interaction with Other Phytohormones

Proteome and Ubiquitome Changes during Rose Petal Senescence

Rice HOX12 Regulates Panicle Exsertion by Directly Modulating the Expression of ELONGATED UPPERMOST INTERNODE1

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