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. 2020 May 7;11:446. doi: 10.3389/fpls.2020.00446

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Copyright © 2020 Guo, Li, Tian, Du, Liu, Huang, Wang, Ye, Zhang and Tu.

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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The development of source organs was suppressed in cytosolic ascorbate peroxidase (APX) interfered cotton. (A) Relative expression levels of cytosolic APXs compared with the reference gene GhUB7 in transgenic cotton. OA, 35S-overexpressed GhAPX1 lines; WT, wild-type cotton; IAO, the interference of cytosolic APXs transgenic lines. GhUB7 used as the reference gene for the relative expression level. Three biological duplicated experiments were performed. AM and PM indicated that leaves for expression level detection were collected in the morning and afternoon, respectively. (B) Plant architecture of GhAPX1-overexpressed plants and cytosolic APX-suppressed plants compared with the wild-type plants. (C) The plant height of transgenic cotton plant in field with three independent experiments (mean ± SD, n = 8 plants of each line). (D) The third upper leaf of GhAPX1-overexpressed and cytosolic APX-suppressed plants. (E) The leaf length of the third upper leaf in transgenic plant with three independent experiments (mean ± SD, n = 8 plants of each line). (F) The leaf width of the third upper leaf in transgenic plant with three independent experiments (mean ± SD, n = 8 plants of each line). ^∗Indicates significant difference using Duncan’s multiple comparisons (^∗P < 0.05; ^∗∗P < 0.01).