J Integr Plant Biol

NaMYB8 regulates distinct, optimally distributed herbivore defense traits

Martin Schäfer, Christoph Brütting, Shuqing Xu, Zhihao Ling, Anke Steppuhn, Ian T. Baldwin, and Meredith C. Schuman

2017, 59(12): 844-850. doi:10.1111/jipb.12593

摘要 ( 733 )

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Tissues contributing most to plant fitness, such as younger leaves and flowers, are often the best defended: a prediction of optimal defense theory (OD). The mechanisms determining optimal distributions are poorly understood. We show that a MYB transcription factor co-regulates biosynthetically unrelated defenses which share an optimal distribution.

Arabidopsis EXO70A1 recruits Patellin3 to the cell membrane independent of its role as an exocyst subunit

Chengyun Wu, Lu Tan, Max van Hooren, Xiaoyun Tan, Feng Liu, Yan Li, Yanxue Zhao, Bingxuan Li, Qingchen Rui, Teun Munnik, and Yiqun Bao

2017, 59(12): 851-865. doi:10.1111/jipb.12578

摘要 ( 1778 )

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The octameric exocyst complex is thought to act as a whole to tether vesicles before fusion. In this study, exocyst subunit EXO70A1 was found to play a unique role in recruiting cytosolic PATL3 onto the cell membrane, independent of the conventional role of the exocyst in secretory/recycling vesicle-tethering.

Genetic dissection of top three leaf traits in rice using progenies from a japonica × indica cross

Changbin Yin, Huihui Li, Zhigang Zhao, Zhiquan Wang, Shijia Liu, Liangming Chen, Xi Liu, Yunlu Tian, Juan Ma, Lidong Xu, Dashuang Zhang, Susong Zhu, Danting Li, Jianmin Wan, and Jiankang Wang

2017, 59(12): 866-880. doi:10.1111/jipb.12597

摘要 ( 891 )

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Top three leaves in rice determine plant type and grain yield. Using one japonica×indica cross, we identified 30 genomic regions and then confirmed 23 of them affecting length and width of the top three leaves. Compared with length, width is more correlated with each other, sharing more common genes.

Stigmatic exudate in the Annonaceae: Pollinator reward, pollen germination medium or extragynoecial compitum?

Jenny Y. Y. Lau, Chun-Chiu Pang, Lawrence Ramsden and Richard M.K. Saunders

2017, 59(12): 881-894. doi:10.1111/jipb.12598

摘要 ( 724 )

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Unlike most early-divergent flowering plants, Annonaceae species produce copious stigmatic fluid when receptive. We investigated the role of this exudate, and provided evidence to support three functions: as a food reward for pollinators; as a pollen germination medium; and as a medium that allows pollen tube growth between separate carpels.

Potassium channel AKT1 is involved in the auxin-mediated root growth inhibition in Arabidopsis response to low K⁺ stress

Juan Li, Wei-Hua Wu and Yi Wang

2017, 59(12): 895-909. doi:10.1111/jipb.12575

摘要 ( 2014 )

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AKT1 is an important K⁺ channel that mediates K⁺ uptake in Arabidopsis root. Here, we demonstrated that AKT1 plays an essential role in Arabidopsis response to low K⁺ stress. AKT1 can perceive external K⁺ concentration and subsequently regulate primary root growth by modulating PIN1 degradation and auxin redistribution.

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