J Integr Plant Biol ›› 2015, Vol. 57 ›› Issue (1): 63-78.DOI: 10.1111/jipb.12289

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Organelle trafficking, the cytoskeleton, and pollen tube growth

Giampiero Cai*, Luigi Parrotta and Mauro Cresti   

  • 收稿日期:2014-08-29 接受日期:2014-09-23 出版日期:2015-01-01 发布日期:2014-09-27

Organelle trafficking, the cytoskeleton, and pollen tube growth

Giampiero Cai*, Luigi Parrotta and Mauro Cresti   

  1. Department of Life Sciences, University of Siena, Siena, Italy
  • Received:2014-08-29 Accepted:2014-09-23 Online:2015-01-01 Published:2014-09-27
  • About author:*Correspondence: E-mail: giampiero.cai@unisi.it

被引次数

44

摘要： Organelle movement is essential for the growing plant cells as it allows to deliver specific molecules towards particular cell sites; movement is mostly based on actin filaments and on actin-based motor proteins although microtubules and microtubule-based motor proteins also likely play a subtle but important role.

Abstract:

The pollen tube is fundamental for the reproduction of seed plants. Characteristically, it grows relatively quickly and uni-directionally (“polarized growth”) to extend the male gametophyte to reach the female gametophyte. The pollen tube forms a channel through which the sperm cells move so that they can reach their targets in the ovule. To grow quickly and directionally, the pollen tube requires an intense movement of organelles and vesicles that allows the cell's contents to be distributed to sustain the growth rate. While the various organelles distribute more or less uniformly within the pollen tube, Golgi-released secretory vesicles accumulate massively at the pollen tube apex, that is, the growing region. This intense movement of organelles and vesicles is dependent on the dynamics of the cytoskeleton, which reorganizes differentially in response to external signals and coordinates membrane trafficking with the growth rate of pollen tubes.

 

Cai G, Parrotta L, Cresti M (2015) Organelle trafficking, the cytoskeleton, and pollen tube growth. J Integr Plant Biol 57: 63–78. doi: 10.1111/jipb.12289

Key words: Actin filaments, cytoplasmic streaming, microtubules, motor proteins, tip growth

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