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The tapetal AHL family protein TEK determines nexine formation in the pollen wall

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  • Yue Lou

    (College of Life and Environment Sciences, Development Center of Plant Germplasm Resources, Shanghai Normal University)

  • Xiao-Feng Xu

    (College of Life and Environment Sciences, Development Center of Plant Germplasm Resources, Shanghai Normal University)

  • Jun Zhu

    (College of Life and Environment Sciences, Development Center of Plant Germplasm Resources, Shanghai Normal University)

  • Jing-Nan Gu

    (College of Life and Environment Sciences, Development Center of Plant Germplasm Resources, Shanghai Normal University)

  • Stephen Blackmore

    (Royal Botanic Garden Edinburgh, 20a, Inverleith Row, Edinburgh EH3 5LR, UK)

  • Zhong-Nan Yang

    (College of Life and Environment Sciences, Development Center of Plant Germplasm Resources, Shanghai Normal University)

Abstract

The pollen wall, an essential structure for pollen function, consists of two layers, an inner intine and an outer exine. The latter is further divided into sexine and nexine. Many genes involved in sexine development have been reported, in which the MYB transcription factor Male Sterile 188 (MS188) specifies sexine in Arabidopsis. However, nexine formation remains poorly understood. Here we report the knockout of TRANSPOSABLE ELEMENT SILENCING VIA AT-HOOK (TEK) leads to nexine absence in Arabidopsis. TEK encodes an AT-hook nuclear localized family protein highly expressed in tapetum during the tetrad stage. Absence of nexine in tek disrupts the deposition of intine without affecting sexine formation. We find that ABORTED MICROSPORES directly regulates the expression of TEK and MS188 in tapetum for the nexine and sexine formation, respectively. Our data show that a transcriptional cascade in the tapetum specifies the development of pollen wall.

Suggested Citation

  • Yue Lou & Xiao-Feng Xu & Jun Zhu & Jing-Nan Gu & Stephen Blackmore & Zhong-Nan Yang, 2014. "The tapetal AHL family protein TEK determines nexine formation in the pollen wall," Nature Communications, Nature, vol. 5(1), pages 1-9, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4855
    DOI: 10.1038/ncomms4855
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    Cited by:

    1. Fengqing Han & Kaiwen Yuan & Wenru Sun & Xiaoli Zhang & Xing Liu & Xinyu Zhao & Limei Yang & Yong Wang & Jialei Ji & Yumei Liu & Zhansheng Li & Jinzhe Zhang & Chunzhi Zhang & Sanwen Huang & Yangyong Z, 2023. "A natural mutation in the promoter of Ms-cd1 causes dominant male sterility in Brassica oleracea," Nature Communications, Nature, vol. 14(1), pages 1-15, December.

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