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Significance C4 leaves are superior to C3 leaves in photosynthetic efficiency because they have the Kranz anatomy, in which the veins are surrounded by one layer of bundle sheath (BS)… Click to show full abstract
Significance C4 leaves are superior to C3 leaves in photosynthetic efficiency because they have the Kranz anatomy, in which the veins are surrounded by one layer of bundle sheath (BS) cells and one layer of mesophyll (M) cells. To identify early regulators of Kranz development, we obtained 11 transcriptomes of maize pre-BS and pre-M cells. Differential gene expression and gene coexpression analyses and determination of transcription factor (TF) binding motifs provided data for constructing a gene regulatory network (GRN) for Kranz development, which includes known regulators of Kranz anatomy and/or vein development. In situ hybridization of 11 TF genes in the GRN revealed their expression in early Kranz development. This study provides insights into the regulation of early maize leaf development.
Journal Title: Proceedings of the National Academy of Sciences of the United States of America
Year Published: 2022
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