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We are interested in understanding photosynthesis and developing strategies that may allow it to be improved in the future. Our major focus relates to how the efficient C4 pathway has evolved from the ancestral C3 state. In almost all C4 plants, leaves are modified such that changes to their development, cell biology and biochemistry allow photosynthesis to be partitioned between two cell-types. Despite this complexity, C4 photosynthesis has arisen in over sixty separate lineages of angiosperms, and compared with the C3 pathway, photosynthetic efficiency is increased by around 50%.
Our work has provided a number of insights that help explain how C4 photosynthesis operates and evolved. For example, we demonstrated that C3 plants possess cells in stems and petioles that carry out a rudimentary C4 cycle; we isolated the first cis-elements that control the expression of multiple photosynthesis genes in either mesophyll or bundle sheath cells of C4 leaves, and showed that these regulators are found in the ancestral C3 leaf; we provided the first estimates of the extent to which homologous transcription factors are recruited into independent C4 lineages; and we provided the first direct evidence that duons (transcription factor binding sites that reside in exons impact on gene expression) – again these duons are present in the ancestral C3 state. We continue to investigate the regulation of photosynthesis gene expression in C3 and C4 leaves to better understand the molecular parts that evolution has excapted.
Our work has provided a number of insights that help explain how C4 photosynthesis operates and evolved. For example, we demonstrated that C3 plants possess cells in stems and petioles that carry out a rudimentary C4 cycle; we isolated the first cis-elements that control the expression of multiple photosynthesis genes in either mesophyll or bundle sheath cells of C4 leaves, and showed that these regulators are found in the ancestral C3 leaf; we provided the first estimates of the extent to which homologous transcription factors are recruited into independent C4 lineages; and we provided the first direct evidence that duons (transcription factor binding sites that reside in exons impact on gene expression) – again these duons are present in the ancestral C3 state. We continue to investigate the regulation of photosynthesis gene expression in C3 and C4 leaves to better understand the molecular parts that evolution has excapted.
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Yujie Wang,Zhengao Di, Minglang Qin, Shenming Qu, Wenbo Zhong, Lingfeng Yuan,Jing Zhang,Julian M. Hibberd,Ziyi Yu
ACS Central Science (2024)
NEW PHYTOLOGISTno. 1 (2024): 298-313
Natasha E Yelina,Eftychios Frangedakis, Zhemin Wang,Tina B Schreier,Jenna Rever,Marta Tomaselli, Edith Forestier,Kumari Billakurthi, Sibo Ren, Yahui Bai, Julia Stewart-Wood,Jim Haseloff,
biorxiv(2024)
Plant, cell & environment (2024)
Plant methodsno. 1 (2023): 1-11
bioRxiv (Cold Spring Harbor Laboratory) (2023)
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