J Integr Plant Biol

Arabidopsis transcriptional response to extracellular Ca²⁺ depletion involves a transient rise in cytosolic Ca²⁺

Jing Wang, Tergel Tergel, Jianhua Chen, Ju Yang, Yan Kang and Zhi Qi

2015, 57(2): 138-150. doi:10.1111/jipb.12218

摘要 ( 2243 )

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Animal cells have PLC-coupled Ca²⁺ receptor within the plasma membrane to sense extracellular Ca²⁺ concentration increase. In this study, we provide cellular evidence that arabidopsis root cells might have similar mechanism to sense extracellular Ca²⁺ decrease linked with cytosolic Ca²⁺ and downstream gene expression.

Identification and characterization of Mini1, a gene regulating rice shoot development

Yunxia Fang, Jiang Hu, Jie Xu, Haiping Yu, Zhenyuan Shi, Guosheng Xiong, Li Zhu, Dali Zeng, Guangheng Zhang, Zhenyu Gao, Guojun Dong, Meixian Yan, Longbiao Guo, Yonghong Wang, and Qian Qian

2015, 57(2): 151-161. doi:10.1111/jipb.12230

摘要 ( 2900 )

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The aerial part of higher plants is generated from the shoot apical meristem (SAM). A mini rice mutant (mini1), which shows premature termination of shoot development, was identified and characterized. Mini1 encodes a putative adhesion of calyx edges protein and play an important role in maintaining SAM activity in rice.

Structural and functional analysis of an asymmetric bidirectional promoter in Arabidopsis thaliana

Shi-Juan Liu, Qiu-Juan Yue, and Wei Zhang

2015, 57(2): 162-170. doi:10.1111/jipb.12308

摘要 ( 2249 )

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Bidirectional promoters are with unique ability in controlling the expression of divergent gene pairs. The intergenic region of Arabidopsis At1g71850 and At1g71860 is a functional bidirectional promoter, which controls the asymmetric expression of the gene pair in both directions by using orientation-dependent positive and negative cis-elements.

K⁺ retention in leaf mesophyll, an overlooked component of salinity tolerance mechanism: A case study for barley

Honghong Wu, Min Zhu, Lana Shabala, Meixue Zhou and Sergey Shabala

2015, 57(2): 171-185. doi:10.1111/jipb.12238

摘要 ( 2819 )

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This work reports strong positive correlation between barley mesophyll K⁺ retention ability under saline conditions (quantified by the magnitude of NaCl-induced K⁺ efflux from mesophyll) and the overall salinity tolerance and suggests that the above trait represents an important and essentially overlooked component of a salinity tolerance mechanism in plants.

L-Cysteine inhibits root elongation through auxin/PLETHORA and SCR/SHR pathway in Arabidopsis thaliana

Zhen Wang, Jie-Li Mao, Ying-Jun Zhao, Chuan-You Li, and Cheng-Bin Xiang

2015, 57(2): 186-197. doi:10.1111/jipb.12213

摘要 ( 2211 )

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L-Cysteine is essential amino acid. However, its role in root development is largely unknown. This study shows that L-cysteine reduces primary root growth in a dosage-dependent manner through maintaining root stem cell niche by regulating basal- and auxin-induced expression of PLT1/2 and SCR/SHR.

Cytokinin levels and signaling respond to wounding and the perception of herbivore elicitors in Nicotiana attenuata

Martin Schäfer, Ivan D. Meza-Canales, Aura Navarro-Quezada, Christoph Brütting, Radomira Vanková, Ian T. Baldwin, and Stefan Meldau

2015, 57(2): 198-212. doi:10.1111/jipb.12227

摘要 ( 2847 )

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Cytokinins, classical plant growth regulators, were found to be induced after herbivory in the wild tobacco. The response was wound-induced, but also dependent on elicitors which present in oral secretions of tobacco hornworm caterpillars. The changes were not dependent on, but modified by jasmonates. Similar responses were also observed in arabidopsis.

OsHK3 is a crucial regulator of abscisic acid signaling involved in antioxidant defense in rice

Feng Wen, Tingting Qin, Yao Wang, Wen Dong, Aying Zhang, Mingpu Tan, and Mingyi Jiang

2015, 57(2): 213-228. doi:10.1111/jipb.12222

摘要 ( 2920 )

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This study finds that the rice histidine kinase OsHK3 plays important roles in the regulation of abscisic acid (ABA)-induced antioxidant defense and in the feedback regulation of H₂O₂ production in ABA signaling.

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