Abstract：
:Axillary meristems (AMs) give rise to lateral shoots and are critical to plant architecture. Understanding how developmental cues and environmental signals impact AM development will enable the improvement of plant architecture in agriculture. Here, we show that ARGONAUTE10 (AGO10), which sequesters miR165/166, promotes AM development through the miR165/166 target gene REVOLUTA. We reveal that AGO10 expression is precisely controlled temporally and spatially by auxin, brassinosteroids, and light to result in AM initiation only in the axils of leaves at a certain age. AUXIN RESPONSE FACTOR 5 (ARF5) activates while BRASSINAZOLE-RESISTANT 1 (BZR1) and PHYTOCHROME-INTERACTING FACTOR 4 (PIF4) repress AGO10 transcription directly. In axils of young leaves, BZR1 and PIF4 repress AGO10 expression to prevent AM initiation. In axils of older leaves, ARF5 upregulates AGO10 expression to promote AM initiation. Our results uncover the spatiotemporal control of AM development through the cooperation of hormones and light converging on a regulator of microRNA.
journal_name
Dev Celljournal_title
Developmental cellauthors
Zhang C,Fan L,Le BH,Ye P,Mo B,Chen Xdoi
10.1016/j.devcel.2020.10.019subject
Has Abstractpub_date
2020-12-07 00:00:00pages
603-616.e5issue
5eissn
1534-5807issn
1878-1551pii
S1534-5807(20)30839-Xjournal_volume
55pub_type
杂志文章abstract：:The blood brain barrier (BBB) is critical to ensure proper nervous system function and organismal health. In this issue of Developmental Cell, Babatz and colleagues explore the mechanisms of BBB maintenance and uncover a potential evolutionary link by which BBB glia construct paracellular barriers to ensure uninterrup...
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