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Cytoplasmic motors and pollen tube growth

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Abstract

The growth of pollen tubes is characterized by an intense cytoplasmic streaming, during which the movements of smaller organelles (like secretory vesicles) and larger ones (including the generative cell and vegetative nucleus) are precisely coordinated. A well-characterized cytoskeletal apparatus is likely responsible for these intracellular movements. In recent years both microfilament and microtubule-based motor proteins have been identified and assumed to be the translocators of the several organelle categories. Their precise function during pollen tube growth is not yet clear, but apparently an actomyosin-based system is mainly responsible for pollen tube elongation. On the other hand, microtubules and microtubule-based motors have been thought to play a role in the maintenance of cell polarity. Both cytoskeletal systems (and their respective motor activities) could cooperate to ensure a precise regulation of pollen tube growth.

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Authors and Affiliations

  1. Dipartimento di Biologia Ambientale, Università di Siena, via P.A. Mattioli 4, I-53100, Siena, Italy

    G. Cai, A. Moscatelli, C. Del Casino & M. Cresti

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  1. G. Cai
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  2. A. Moscatelli
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  3. C. Del Casino
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  4. M. Cresti
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Correspondence to G. Cai.

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Cai, G., Moscatelli, A., Del Casino, C. et al. Cytoplasmic motors and pollen tube growth. Sexual Plant Reprod 9, 59–64 (1996). https://doi.org/10.1007/BF02153052

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