J Integr Plant Biol

RPL18aB helps maintain suspensor identity during early embryogenesis

Fei Xie, Hailong Yan, Yang Sun, Yameng Wang, Hong Chen, Wanying Mao, Liyao Zhang, Mengxiang Sun and Xiongbo Peng

2018, 60(4): 266-269. doi:10.1111/jipb.12616

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Suspensors of rpl18aB mutant lose cell identity with the mis‐expression of the embryo proper marker DRN::GFP and by not expressing the suspensor marker WOX8::GFP. Moreover, suspensor‐specific expression of RPL18aB could rescue the cell proliferation defects in rpl18aB suspensors. These findings supported a role of RPL18aB in maintaining suspensor cell identity.

Differential requirement of BAK1 C‐terminal tail in development and immunity

Di Wu, Yanan Liu, Fan Xu and Yuelin Zhang

2018, 60(4): 270-275. doi:10.1111/jipb.12623

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In this study, we showed that the C‐terminal tail of BAK1 promotes its kinase activity and is required for PAMP‐triggered immunity, but is dispensable in brassinosteroid responses and cell death control, suggesting that the C‐terminal tail is differentially required for the functions of BAK1 in development and immunity.

The dioxygenase GIM2 functions in seed germination by altering gibberellin production in Arabidopsis

Wei Xiong, Tiantian Ye, Xuan Yao, Xiong Liu, Sheng Ma, Xi Chen, Ming-Luan Chen, Yu-Qi Feng, and Yan Wu

2018, 60(4): 276-291. doi:10.1111/jipb.12619

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The phytohormone GA plays a critical role in regulating seed germination. We demonstrate how GIM2, a member of 2OGD family, catalyzes the oxidation of GA₁₂ in GA biosynthetic pathway, thus modulating seed germination in Arabidopsis.

Natural variation of hormone levels in Arabidopsis roots and correlations with complex root architecture

Sangseok Lee, Lidiya I. Sergeeva, and Dick Vreugdenhil

2018, 60(4): 292-309. doi:10.1111/jipb.12617

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A range of hormone levels were quantified in root extracts of Arabidopsis accessions. Except for biologically active hormones, most of their intermediates showed narrow ranges of variation. Correlations between hormone levels and root traits were observed, which showed antagonistic interactions of shaping root system architecture.

OTS1‐dependent deSUMOylation increases tolerance to high copper levels in Arabidopsis

Erbao Zhan, Huapeng Zhou, Sha Li, Lei Liu, Tinghong Tan, and Honghui Lin

2018, 60(4): 310-322. doi:10.1111/jipb.12618

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OTS1, a protease that cleaves SUMO from its substrate proteins, participates in Cu tolerance in Arabidopsis thaliana.

Overexpression of microRNA408 enhances photosynthesis, growth, and seed yield in diverse plants

Jiawei Pan, Dahui Huang, Zhonglong Guo, Zheng Kuang, He Zhang, Xinyu Xie, Zengfeng Ma, Shaopei Gao, Manuel T. Lerdau, Chengcai Chu, and Lei Li

2018, 60(4): 323-340. doi:10.1111/jipb.12634

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This work shows that a conserved small RNA, miR408, promotes photosynthesis and vegetative growth in diverse plant species. In rice, over expression of miR408 leads to enlarged seed size and increased grain weight without compromising other aspects of plant growth, demonstrating the biotechnological potential of miR408 in crop improvement.

Xanthomonas axonopodis pv. punicae uses XopL effector to suppress pomegranate immunity

Madhvi Soni and Kalyan K. Mondal

2018, 60(4): 341-357. doi:10.1111/jipb.12615

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Bacterial blight causes havoc loss to pomegranate. The pathogen, Xanthomonas axonopodis pv. Punicae employs XopL effector to subvert pomegranate immunity. We demonstrated that XopL acts as a suppressor of immune responses like PCD, callose deposition, ROS production and transcript abundance of defense genes to facilitate bacterial multiplication in the invaded tissues.

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