PPF1 May Suppress Plant Senescence via Activating TFL1 in Transgenic Arabidopsis Plants

Senescence, a sequence of biochemical and physiological events, constitutes the final stage of development in higher plants and is modulated by a variety of environmental factors and internal factors. PPF1 possesses an important biological function in plant development by controlling the Ca²⁺ storag...

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Bibliographic Details
Published in:Journal of integrative plant biology 2008-04, Vol.50 (4), p.475-483
Main Authors: Wang, Da-Yong, Li, Qing, Cui, Ke-Ming, Zhu, Yu-Xian
Format: Article
Language:English
Subjects:
Arabidopsis - cytology
Arabidopsis - genetics
Arabidopsis - growth & development
Arabidopsis Proteins - metabolism
Arabidopsis thaliana
Calcium-Binding Proteins - metabolism
Cell Differentiation
Chlorophyll - metabolism
DNA, Complementary - genetics
Flowers - genetics
Gene Expression Regulation, Plant
Malondialdehyde - metabolism
Mutation - genetics
Phenotype
plant senescence
Plants, Genetically Modified
PPF1
Reverse Transcriptase Polymerase Chain Reaction
target
TFL1
Time Factors
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Summary:Senescence, a sequence of biochemical and physiological events, constitutes the final stage of development in higher plants and is modulated by a variety of environmental factors and internal factors. PPF1 possesses an important biological function in plant development by controlling the Ca²⁺ storage capacity within chloroplasts. Here we show that the expression of PPF1 might play a pivotal role in negatively regulating plant senescence as revealed by the regulation of overexpression and suppression of PPF1 on plant development. Moreover, TFL1, a key regulator in the floral repression pathway, was screened out as one of the downstream targets for PPF1 in the senescence-signaling pathway. Investigation of the senescence-related phenotypes in PPF1(-) tfl1-1 and PPF1(+) tfl1-1 double mutants confirmed and further highlighted the relation of PPF1 with TFL1 in transgenic plants. The activation of TFL1 expression by PPF1 defines an important pathway possibly essential for the negative regulation of plant senescence in transgenic Arabidopsis.
ISSN:1672-9072
1744-7909
DOI:10.1111/j.1744-7909.2008.00643.x