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Fine structure of the plasmalemma surface of poplar parenchyma cells observed by the freeze etching technique

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Abstract

The plasmalemma surface of poplar parenchyma cells observed by the freeze etching technique is characterized by 11 nm particles, primary pit fields, lomasome-like structures and fibrillar structures.

The most remarkable feature is the occurrence of fibrillar structures, which are considered to be the imprint of underlying microtubules on the plasmalemma surface. The previously reported observation on the possible appearance of microtubules at the cytoplasmic surface inside the plasmalemma is questionable.

Although the fibrillar structures run almost perpendicular to the main cell axis, longitudinally oriented ones are also found, the occurrence of which is discussed in relation to the orientation of the cellulose microfibrils.

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Abbreviations

CW:

cell wall

F:

fibrillar structure

Lo:

lomasome

MT:

microtubule

PD:

plasmodesma

:

concave plane of the plasmalemma

\(\widehat{PL}\) :

convex plane of the plasmalemma

PPF:

primary pit field

:

concave plane of the tonoplast

V:

vacuole

:

direction of shadowing

↔:

main cell axis

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Authors and Affiliations

  1. Division of Wood Biology, Wood Research Institute, Kyoto University, 611, Uji, Kyoto

    Takao Itoh

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  1. Takao Itoh
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Itoh, T. Fine structure of the plasmalemma surface of poplar parenchyma cells observed by the freeze etching technique. Bot Mag Tokyo 88, 131–143 (1975). https://doi.org/10.1007/BF02491248

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  • DOI: https://doi.org/10.1007/BF02491248

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