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. 2022 Jan 31;12:758526. doi: 10.3389/fpls.2021.758526

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Copyright © 2022 Li, Liu, Yao, Sun and Sui.

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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Immunohistochemical localization of CsSWEET7a in female cucumber flowers. Longitudinal (A–E) and transverse sections (F–H) of female flowers with AP as the second antibody. (B,D,G) The close-up of the boxes in panels (A,F), respectively. The white arrows in panel (D) indicate the sieve plate. (C,E,H) Sections were incubated with pre-immune serum as a control. Images in panels (G,H) were rotated 90°clockwise. The Roman numerals in red at the top-right corner (B–E,G,H) correspond to those fields in panels (A,F). Nec, nectary; Re, receptacle; Ph, phloem; Xy, xylem; SP, sieve plate.