J Integr Plant Biol

Natural hybridization and reproductive isolation between two Primula species

Yanping Xie, Xingfu Zhu, Yongpeng Ma, Jianli Zhao, Li Li, and Qingjun Li

2017, 59(8): 526-530. doi:10.1111/jipb.12546

摘要 ( 1291 )

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Natural hybridization possibly results in species refusion. However, various reproductive barriers block the formation of hybrids and maintain species integrity. Here, we examined natural hybridization and reproductive isolation between sympatric populations of Primula secundiflora and P. poissonii. The results suggest specific boundaries maintained well through nearly complete reproductive isolation.

Overexpression of GhFIM2 propels cotton fiber development by enhancing actin bundle formation

Min Zhang, Li-Bo Han, Wen-Yan Wang, Shen-Jie Wu, Gai-Li Jiao, Lei Su, Gui-Xian Xia, and Hai-Yun Wang

2017, 59(8): 531-534. doi:10.1111/jipb.12552

摘要 ( 1271 )

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This study demonstrated that actin bundling protein GhFIM2 is involved in the dynamic remodeling of actin cytoskeleton in developing cotton fiber. Overexpression of GhFIM2 accelerated the fiber cell growth at the fast-elongating stage and led to an early deposition of the secondary cell wall.

HP30-2, a mitochondrial PRAT protein for import of signal sequence-less precursor proteins in Arabidopsis thaliana

Claudia Rossig, John Gray, Oscar Valdes, Sachin Rustgi, Diter von Wettstein, Christiane Reinbothe, and Steffen Reinbothe

2017, 59(8): 535-551. doi:10.1111/jipb.12555

摘要 ( 935 )

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Chloroplasts and mitochondria are semi-autonomous cell organelles that need to import most of their proteins from the cyotosol. Here, we report on a protein belonging to the family of preprotein and amino acid transporters designated PRAT that operates in the translocation of transit sequence-less precursor proteins into both organelle types.

JA but not JA-Ile is the cell-nonautonomous signal activating JA mediated systemic defenses to herbivory in Nicotiana attenuata

Tohir A. Bozorov, Son Truong Dinh, and Ian T. Baldwin

2017, 59(8): 552-571. doi:10.1111/jipb.12545

摘要 ( 1089 )

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This study examined the role of jasmonates in the systemic activation of defenses during herbivory, and found that JA but not JA-Ile activates systemic defenses in a cell-nonautonomous manner. This was demonstrated by the shoot grafting of WT and various JA-deficient transgenic lines in different combinations. The work also demonstrated a role for signals other than JA.

Circadian clock component, LHY, tells a plant when to respond photosynthetically to light in nature

Youngsung Joo, Variluska Fragoso, Felipe Yon, Ian T. Baldwin, and Sang-Gyu Kim

2017, 59(8): 572-587. doi:10.1111/jipb.12547

摘要 ( 1063 )

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Biological circadian clocks were not engineered but evolved through the process of evolutionary tinkering by natural selection. By measuring photosynthetic rates under field and laboratory conditions, we conclude that the plant circadian clock allows plants to selectively pay attention to light signals rather than “when to wake up” in anticipation of the rising sun.

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