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2016年 第58卷 第2期 刊出日期：2016-02-01

2016年 第58卷 第2期
刊出日期：2016-02-01

  

Plant Mediator complex and its critical functions in transcription regulation

Yan Yang, Ling Li, and Li-Jia Qu

2016, 58(2):  106-118.  doi:10.1111/jipb.12377

摘要 ( 2018 )  

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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.

Determinants of timing and amplitude in the plant general stress response

Marta Bjornson, Abhaya Dandekar, and Katayoon Dehesh

2016, 58(2):  119-126.  doi:10.1111/jipb.12373

摘要 ( 2186 )  

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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.

Role of rice cytosolic hexokinase OsHXK7 in sugar signaling and metabolism

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

2016, 58(2):  127-135.  doi:10.1111/jipb.12366

摘要 ( 2838 )  

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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 OsHXK7 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.

Characterization of novel Brown midrib 6 mutations affecting lignin biosynthesis in sorghum

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

2016, 58(2):  136-149.  doi:10.1111/jipb.12375

摘要 ( 2024 )  

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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.

Transcriptome shock in an interspecific F1 triploid hybrid of Oryza revealed by RNA sequencing

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

2016, 58(2):  150-164.  doi:10.1111/jipb.12357

摘要 ( 2866 )  

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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.

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

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

2016, 58(2):  165-177.  doi:10.1111/jipb.12365

摘要 ( 2004 )  

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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.

Floral nectary, nectar production dynamics, and floral reproductive isolation among closely related species of Pedicularis

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

2016, 58(2):  178-187.  doi:10.1111/jipb.12374

摘要 ( 2067 )  

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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.