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. 2022 May 10;13:876198. doi: 10.3389/fgene.2022.876198

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Copyright © 2022 Parida, Sekhar, Panda, Sahu and Shaw.

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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Spatio-temporal depiction of the rate of endosperm cell division in two lax-panicle rice cultivars, Upahar and Lalat, and two compact-panicle rice cultivars, Mahalaxmi and OR-1918. The peak of the endosperm cell division rate in the apical spikelets reaches earlier in the lax-panicle cultivars compared with compact-panicle cultivars, and in the basal spikelets, the arrival of the peak is delayed greatly in the compact-panicle cultivars compared with the lax-panicle cultivars. The cessation of the endosperm cell division in the basal spikelets of the compact-panicle cultivars is also delayed greatly, almost 3 days, when compared with that of the lax-panicle cultivars, leading to poor grain filling in the former. Reproduced with the permission of the author (Sahu et al., 2021).