TY  - JOUR
AB  - C-4 photosynthesis outperforms the ancestral C-3 state in a wide range of natural and agro-ecosystems by affording higher water-use and nitrogen-use efficiencies. It therefore represents a prime target for engineering novel, high-yielding crops by introducing the trait into C-3 backgrounds. However, the genetic architecture of C-4 photosynthesis remains largely unknown. To define the divergence in gene expression modules between C-3 and C-4 photosynthesis during leaf ontogeny, we generated comprehensive transcriptome atlases of two Cleomaceae species, Gynandropsis gynandra (C-4) and Tarenaya hassleriana (C-3), by RNA sequencing. Overall, the gene expression profiles appear remarkably similar between the C-3 and C-4 species. We found that known C-4 genes were recruited to photosynthesis from different expression domains in C-3, including typical housekeeping gene expression patterns in various tissues as well as individual heterotrophic tissues. Furthermore, we identified a structure-related module recruited from the C-3 root. Comparison of gene expression patterns with anatomy during leaf ontogeny provided insight into genetic features of Kranz anatomy. Altered expression of developmental factors and cell cycle genes is associated with a higher degree of endoreduplication in enlarged C-4 bundle sheath cells. A delay in mesophyll differentiation apparent both in the leaf anatomy and the transcriptome allows for extended vein formation in the C-4 leaf.
DA  - 2014
DO  - 10.1105/tpc.114.123752
LA  - eng
IS  - 8
M2  - 3243
PY  - 2014
SN  - 1040-4651
SP  - 3243-3260
T2  - Plant Cell
TI  - Comparative Transcriptome Atlases Reveal Altered Gene Expression Modules between Two Cleomaceae C-3 and C-4 Plant Species
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-29151340
Y2  - 2024-12-25T17:33:07
ER  -