TaKLU Plays as a Time Regulator of Leaf Growth via Auxin Signaling

The growth of leaves is subject to strict time regulation. Several genes influencing leaf growth have been identified, but little is known about how genes regulate the orderly initiation and growth of leaves. Here, we demonstrate that contributes to a time regulation mechanism in leaves from initiat...

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Bibliographic Details
Published in:International journal of molecular sciences 2022-04, Vol.23 (8), p.4219
Main Authors: Zhou, Mengdie, Peng, Haixia, Wu, Linnan, Li, Mengyao, Guo, Lijian, Chen, Haichao, Wu, Baowei, Liu, Xiangli, Zhao, Huixian, Li, Wenqiang, Ma, Meng
Format: Article
Language:English
Subjects:
Agricultural production
auxin
Auxins
Biomass
Cell cycle
Cell division
Cyclin-dependent kinases
CYP78A
Cytochrome P450
Cytochromes P450
Flowers & plants
Gene Expression Regulation, Plant
Gene regulation
Genes
Homology
Indoleacetic Acids
Investigations
Kinases
leaf growth
Leaves
Plant Leaves - genetics
Senescence
Signal Transduction
Triticum - genetics
Wheat
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Summary:The growth of leaves is subject to strict time regulation. Several genes influencing leaf growth have been identified, but little is known about how genes regulate the orderly initiation and growth of leaves. Here, we demonstrate that contributes to a time regulation mechanism in leaves from initiation to expansion. encodes the cytochrome P450 CYP78A5, and its homolog has been described whose deletion is detrimental to organ growth. Our results show that overexpression increases leaf size and biomass by altering the time of leaf initiation and expansion. -overexpressing plants have larger leaves with more cells. Further dynamic observations indicate that enlarged wheat leaves have experienced a longer expansion time. Different from inactivation increases leaf number and initiation rates, overexpression only smooths the fluctuations of leaf initiation rates by adjusting the initiation time of local leaves, without affecting the overall leaf number and initiation rates. In addition, complementary analyses suggest is functionally conserved with in controlling the leaf initiation and size and may involve auxin accumulation. Our results provide a new insight into the time regulation mechanisms of leaf growth in wheat.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms23084219