Structure and function of homodomain-leucine zipper (HD-Zip) proteins

Elhiti, Mohamed; Stasolla, Claudio

doi:10.4161/psb.4.2.7692

Cited by 156 publications

(117 citation statements)

References 30 publications

(26 reference statements)

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“…Homeodomain leucine zipper (HD-ZIP) transcription factors regulate diverse aspects of angiosperm sporophyte development including shoot apical meristem identity, abaxial-adaxial leaf patterning, and epidermal development (Elhiti and Stasolla 2009). The origin of two major groups of HD-ZIP proteins (class III and class IV) has been traced back to charophyte algae (Floyd et al 2006;Zalewski et al 2013).…”

Section: How Much Of the Embryophyte Molecular Genetic Toolkit Originmentioning

confidence: 99%

Green Algae and the Origins of Multicellularity in the Plant Kingdom

Umen

2014

Cold Spring Harbor Perspectives in Biology

115

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The green lineage of chlorophyte algae and streptophytes form a large and diverse clade with multiple independent transitions to produce multicellular and/or macroscopically complex organization. In this review, I focus on two of the best-studied multicellular groups of green algae: charophytes and volvocines. Charophyte algae are the closest relatives of land plants and encompass the transition from unicellularity to simple multicellularity. Many of the innovations present in land plants have their roots in the cell and developmental biology of charophyte algae. Volvocine algae evolved an independent route to multicellularity that is captured by a graded series of increasing cell-type specialization and developmental complexity. The study of volvocine algae has provided unprecedented insights into the innovations required to achieve multicellularity.

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Section: How Much Of the Embryophyte Molecular Genetic Toolkit Originmentioning

confidence: 99%

Green Algae and the Origins of Multicellularity in the Plant Kingdom

Umen

2014

Cold Spring Harbor Perspectives in Biology

115

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“…Homeodomain-leucine zipper (HD-ZIP) transcription factors are unique to the plant kingdom (Ruberti et al, 1991;Schena and Davis, 1992;Ariel et al, 2007;Elhiti and Stasolla, 2009). HD-ZIP genes play diverse functions in plant development and plant adaptation to environmental stresses (Arce et al, 2011;Brandt et al, 2014).…”

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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“…The Dof motif in the Dof-type zinc finger gene is an evolutionarily conversed transcription factor that can function as a transcriptional activator or repressor of tissue-specific and light-regulated gene expression in maize (Yanagisawa and Sheen, 1998). Homeobox-Leu zipper family protein/lipid-binding START domain-containing proteins are conserved transcription factors unique to plants and have been linked to redox homeostasis, light signaling, and disease resistance (Elhiti and Stasolla, 2009;Fu et al, 2009). …”

Section: Transcription Factormentioning

confidence: 99%

The Genetics of Leaf Flecking in Maize and Its Relationship to Plant Defense and Disease Resistance

et al. 2016

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Physiological leaf spotting, or flecking, is a mild-lesion phenotype observed on the leaves of several commonly used maize (Zea mays) inbred lines and has been anecdotally linked to enhanced broad-spectrum disease resistance. Flecking was assessed in the maize nested association mapping (NAM) population, comprising 4,998 recombinant inbred lines from 25 biparental families, and in an association population, comprising 279 diverse maize inbreds. Joint family linkage analysis was conducted with 7,386 markers in the NAM population. Genome-wide association tests were performed with 26.5 million single-nucleotide polymorphisms (SNPs) in the NAM population and with 246,497 SNPs in the association population, resulting in the identification of 18 and three loci associated with variation in flecking, respectively. Many of the candidate genes colocalizing with associated SNPs are similar to genes that function in plant defense response via cell wall modification, salicylic acid-and jasmonic acid-dependent pathways, redox homeostasis, stress response, and vesicle trafficking/remodeling. Significant positive correlations were found between increased flecking, stronger defense response, increased disease resistance, and increased pest resistance. A nonlinear relationship with total kernel weight also was observed whereby lines with relatively high levels of flecking had, on average, lower total kernel weight. We present evidence suggesting that mild flecking could be used as a selection criterion for breeding programs trying to incorporate broad-spectrum disease resistance.

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Structure and function of homodomain-leucine zipper (HD-Zip) proteins

Abstract: Abbreviation: HD-Zip, homeodomain-leucine zipper; ABA, abssisic acid; SAM, shoot apical meristem

Cited by 156 publications

References 30 publications

Green Algae and the Origins of Multicellularity in the Plant Kingdom

Green Algae and the Origins of Multicellularity in the Plant Kingdom

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

The Genetics of Leaf Flecking in Maize and Its Relationship to Plant Defense and Disease Resistance

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