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@article{1314737,
author = {Vercruyssen, Liesbeth and Tognetti, Vanesa Beatriz and Gonzalez, Nathalie and Van Dingenen, Judith and De Milde, Liesbeth and Bielach, Agnieszka and De Rycke, Riet and Van Breusegem, Frank and Inze, Dirk},
article_location = {Rockville (USA)},
article_number = {3},
doi = {http://dx.doi.org/10.1104/pp.114.256180},
keywords = {CYTOKININ SIGNAL-TRANSDUCTION; B RESPONSE REGULATORS; PORC DOUBLE MUTANT; TRANSCRIPTION FACTORS; PROTOCHLOROPHYLLIDE OXIDOREDUCTASE; CELL-PROLIFERATION; ABSCISIC-ACID; CHLOROPHYLL BIOSYNTHESIS; PROTEIN INTERACTIONS; NEGATIVE REGULATOR},
language = {eng},
issn = {0032-0889},
journal = {Plant Physiology},
title = {GROWTH REGULATING FACTOR5 Stimulates Arabidopsis Chloroplast Division, Photosynthesis, and Leaf Longevity},
url = {http://www.plantphysiol.org/content/167/3/817.full.pdf+html},
volume = {167},
year = {2015}
}
TY - JOUR
ID - 1314737
AU - Vercruyssen, Liesbeth - Tognetti, Vanesa Beatriz - Gonzalez, Nathalie - Van Dingenen, Judith - De Milde, Liesbeth - Bielach, Agnieszka - De Rycke, Riet - Van Breusegem, Frank - Inze, Dirk
PY - 2015
TI - GROWTH REGULATING FACTOR5 Stimulates Arabidopsis Chloroplast Division, Photosynthesis, and Leaf Longevity
JF - Plant Physiology
VL - 167
IS - 3
SP - "817"-"+"
EP - "817"-"+"
PB - American Society of Plant Physiologists
SN - 00320889
KW - CYTOKININ SIGNAL-TRANSDUCTION
KW - B RESPONSE REGULATORS
KW - PORC DOUBLE MUTANT
KW - TRANSCRIPTION FACTORS
KW - PROTOCHLOROPHYLLIDE OXIDOREDUCTASE
KW - CELL-PROLIFERATION
KW - ABSCISIC-ACID
KW - CHLOROPHYLL BIOSYNTHESIS
KW - PROTEIN INTERACTIONS
KW - NEGATIVE REGULATOR
UR - http://www.plantphysiol.org/content/167/3/817.full.pdf+html
L2 - http://www.plantphysiol.org/content/167/3/817.full.pdf+html
N2 - Arabidopsis (Arabidopsis thaliana) leaf development relies on subsequent phases of cell proliferation and cell expansion. During the proliferation phase, chloroplasts need to divide extensively, and during the transition from cell proliferation to expansion, they differentiate into photosynthetically active chloroplasts, providing the plant with energy. The transcription factor GROWTH REGULATING FACTOR5 (GRF5) promotes the duration of the cell proliferation period during leaf development. Here, it is shown that GRF5 also stimulates chloroplast division, resulting in a higher chloroplast number per cell with a concomitant increase in chlorophyll levels in 35S: GRF5 leaves, which can sustain higher rates of photosynthesis. Moreover, 35S: GRF5 plants show delayed leaf senescence and are more tolerant for growth on nitrogen-depleted medium. Cytokinins also stimulate leaf growth in part by extending the cell proliferation phase, simultaneously delaying the onset of the cell expansion phase. In addition, cytokinins are known to be involved in chloroplast development, nitrogen signaling, and senescence. Evidence is provided that GRF5 and cytokinins synergistically enhance cell division and chlorophyll retention after dark-induced senescence, which suggests that they also cooperate to stimulate chloroplast division and nitrogen assimilation. Taken together with the increased leaf size, ectopic expression of GRF5 has great potential to improve plant productivity.
ER -
VERCRUYSSEN, Liesbeth, Vanesa Beatriz TOGNETTI, Nathalie GONZALEZ, Judith VAN DINGENEN, Liesbeth DE MILDE, Agnieszka BIELACH, Riet DE RYCKE, Frank VAN BREUSEGEM and Dirk INZE. GROWTH REGULATING FACTOR5 Stimulates Arabidopsis Chloroplast Division, Photosynthesis, and Leaf Longevity. \textit{Plant Physiology}. Rockville (USA): American Society of Plant Physiologists, 2015, vol.~167, No~3, p.~''817''-''+'', 24 pp. ISSN~0032-0889. doi:10.1104/pp.114.256180.
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