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. 2021 Jul 27;12:704958. doi: 10.3389/fpls.2021.704958

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Copyright © 2021 Kim, Kim, Shin and Kim.

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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A diagram explaining AIF2-regulated pollen development and seed formation. Stage-independent aberrant expression of pollen-producing genes such as SPL and MS1 together with suppression of sucrose-transporting SWEETs, lipid biosynthesis-regulating FADs/LPCATs, and valve margin-forming IND/ALC in AIF2ox plants may act adversely on pollen microspore development, auxin-regulated seed formation and proper silique development. Sucrose- and BR-induced repression of AIF2 bHLH transcription factor positively controls pollen development and/or seed size and numbers.