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. 2019 Jul 12;10:896. doi: 10.3389/fpls.2019.00896

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Copyright © 2019 Abdallah, Baraket, Perez, Ben Mustapha, Salhi-Hannachi and Hormaza.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Pollen germination and pollen tube growth in flowers of Tunisian Japanese plums. (A) Flowers. (a) Balloon stage. (b) Full bloom. (c) Reproductive organs. (d) The pistil. (B) Pollen germination. (a) Germination at the stigma surface. (b) Pollen tube arrested in the style in an incompatible reaction. (c) The pollen tube tip. (d) Pollen tube growing in the base of the style in a compatible reaction. Scale bars = 50 μm. Sta, stamens; Stg, stigma; Sty, style; B.Sty, the base of the style; Ova, ovary; P, Pollen tube.