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Journal of Integrative Plant Biology

Cover image for Vol. 58 Issue 2

February 2016

Volume 58, Issue 2

Pages C1–C1, 105–187

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    4. Invited Expert Reviews
    5. Research Articles
    6. High-Impact Article
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      Cover Caption: Nectary Variation vs Pollination Modes (page C1)

      Article first published online: 25 JAN 2016 | DOI: 10.1111/jipb.12388

      Nectar is an effective reward for pollinators. In this issue, Liu et al. (pp. 178–187) demonstrate that the floral nectary has experienced morphological and functional differentiation among closely related species of Pedicularis, which could have affected nectar production and pollination modes. The results indicate that the gain or loss of nectar, together with variation incorolla form, may have played a key role in driving species diversification in Pedicularis.

  2. Issue information page

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      Issue information page (page 105)

      Article first published online: 25 JAN 2016 | DOI: 10.1111/jipb.12389

  3. Invited Expert Reviews

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    4. Invited Expert Reviews
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    6. High-Impact Article
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    1. Invited Expert Reviews

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      Plant Mediator complex and its critical functions in transcription regulation (pages 106–118)

      Yan Yang, Ling Li and Li-Jia Qu

      Article first published online: 15 SEP 2015 | DOI: 10.1111/jipb.12377

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      Plant Mediator complex is a hub for transcription regulation. It bridges transcription factors and RNA polymerase II to modulate transcription of genes involved in various processes including plant growth, development, defense, production of non-coding RNAs, response to abiotic stresses, flowering regulation and metabolic homeostasis.

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      Determinants of timing and amplitude in the plant general stress response (pages 119–126)

      Marta Bjornson, Abhaya Dandekar and Katayoon Dehesh

      Article first published online: 19 AUG 2015 | DOI: 10.1111/jipb.12373

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      The general stress response enables stress-acclimation via rapid and transient reprograming of gene expression. This article reviews fundamental general stress signaling/response pathways, highlights the importance of timing in staging the response, describes determinants of response peak and amplitude, and explores the role of signaling crosstalk in these processes.

  4. Research Articles

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    1. Metabolism and Biochemistry

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      Role of rice cytosolic hexokinase OsHXK7 in sugar signaling and metabolism (pages 127–135)

      Hyun-Bi Kim, Jung-Il Cho, Nayeon Ryoo, Dong-Ho Shin, Youn-Il Park, Yong-Sic Hwang, Sang-Kyu Lee, Gynheung An and Jong-Seong Jeon

      Article first published online: 24 AUG 2015 | DOI: 10.1111/jipb.12366

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      Rice successfully germinates under O2-deficient conditions utilizing fermentation-produced ATP. OsHXK7, a cytosolic hexokinase, is upregulated in germinating seedlings under O2-deficient conditions. We found that overexpressing O2HXK7 promotes germination and its null mutations suppress germination under O2-deficient conditions. This suggests that OsHXK7 is necessary for efficient seed germination under O2-deficient conditions.

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      Characterization of novel Brown midrib 6 mutations affecting lignin biosynthesis in sorghum (pages 136–149)

      Erin D. Scully, Tammy Gries, Deanna L. Funnell-Harris, Zhanguo Xin, Frank A. Kovacs, Wilfred Vermerris and Scott E. Sattler

      Article first published online: 9 OCT 2015 | DOI: 10.1111/jipb.12375

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      Lignin reduces digestibility and impedes biofuel production. The Bmr6 gene in sorghum encodes an enzyme that catalyzes the last step in lignin synthesis. Several new Bmr6 mutations were identified, which disrupted its protein structure, reduced enzyme activity, significantly reduced lignin content, and improved recovery of fermentable sugars from sorghum biomass.

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    1. Molecular Ecology and Evolution

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      Transcriptome shock in an interspecific F1 triploid hybrid of Oryza revealed by RNA sequencing (pages 150–164)

      Ying Wu, Yue Sun, Xutong Wang, Xiuyun Lin, Shuai Sun, Kun Shen, Jie Wang, Tingting Jiang, Silin Zhong, Chunming Xu and Bao Liu

      Article first published online: 12 JUN 2015 | DOI: 10.1111/jipb.12357

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      Wide hybrids of Oryza can be accompanied with rapid genome-wide changes in gene expression, especially homeolog (alleles from parental species) expression partitioning. These changes may provide a basis for rapid adaptation of the hybrids, and which, if proven heritable, could be introduced to rice cultivars to enrich its genetic diversity.

  6. Research Articles

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    1. Molecular Ecology and Evolution

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      Uncovering the dynamic evolution of nucleotide-binding site-leucine-rich repeat (NBS-LRR) genes in Brassicaceae (pages 165–177)

      Yan-Mei Zhang, Zhu-Qing Shao, Qiang Wang, Yue-Yu Hang, Jia-Yu Xue, Bin Wang and Jian-Qun Chen

      Article first published online: 24 JUL 2015 | DOI: 10.1111/jipb.12365

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      Plant genomes harbor dozens to hundreds of nucleotide-binding site-leucine-rich repeat (NBS-LRR) genes. However, the long-term evolutionary history of these resistance genes has not been fully understood. This study reveals that before and after Brassicaceae speciation, NBS-LRR genes exhibit a dynamic evolutionary pattern of first expansion and then contraction.

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      Floral nectary, nectar production dynamics, and floral reproductive isolation among closely related species of Pedicularis (pages 178–187)

      Ya-Nan Liu, Yan Li, Fu-Sheng Yang and Xiao-Quan Wang

      Article first published online: 30 SEP 2015 | DOI: 10.1111/jipb.12374

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      Floral nectar is an effective reward for pollinators. We detected considerable morphological, structural, and functional differentiation among closely related species of Pedicularis. This could affect nectar production, leading to a shift of pollination patterns rather than pollinators.

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