C 4 leaf development and evolution.

Autor: Huang CF; Biodiversity Research Center, Academia Sinica, 115 Taipei, Taiwan., Liu WY; Biodiversity Research Center, Academia Sinica, 115 Taipei, Taiwan., Yu CP; Biodiversity Research Center, Academia Sinica, 115 Taipei, Taiwan., Wu SH; Institute of Plant and Microbial Biology, Academia Sinica, 115 Taipei, Taiwan., Ku MSB; Institute of Bioagricultural Science, National Chiayi University, 600 Chiayi, Taiwan. Electronic address: mku@mail.ncyu.edu.tw., Li WH; Biodiversity Research Center, Academia Sinica, 115 Taipei, Taiwan; Department of Ecology and Evolution, University of Chicago, Chicago 60637, USA. Electronic address: whli@uchicago.edu.
Jazyk: angličtina
Zdroj: Current opinion in plant biology [Curr Opin Plant Biol] 2023 Dec; Vol. 76, pp. 102454. Date of Electronic Publication: 2023 Sep 22.
DOI: 10.1016/j.pbi.2023.102454
Abstrakt: C 4 photosynthesis is more efficient than C 3 photosynthesis for two reasons. First, C 4 plants have evolved efficient C 4 enzymes to suppress wasteful photorespiration and enhance CO 2 fixation. Second, C 4 leaves have Kranz anatomy in which the veins are surrounded by one layer of bundle sheath (BS) cells and one layer of mesophyll (M) cells. The BS and M cells are functionally well differentiated and also well coordinated for rapid assimilation of atmospheric CO 2 and transport of photo-assimilates between the two types of cells. Recent comparative transcriptomics of developing M and BS cells in young maize embryonic leaves revealed not only potential regulators of BS and M cell differentiation but also rapid early BS cell differentiation whereas slower, more prolonged M cell differentiation, contrary to the traditional view of a far simpler process of M cell development. Moreover, new upstream regulators of Kranz anatomy development have been identified and a number of gene co-expression modules for early vascular development have been inferred. Also, a candidate gene regulatory network associated with Kranz anatomy and vascular development has been constructed. Additionally, how whole genome duplication (WGD) may facilitate C 4 evolution has been studied and the reasons for why the same WGD event led to successful C 4 evolution in Gynandropsis gynandra but not in the sister species Tarenaya hassleriana have been proposed. Finally, new future research directions are suggested.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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