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PPF1 May Suppress Plant Senescence via Activating TFL1 in Transgenic Arabidopsis Plants
Author(s) -
Wang DaYong,
Li Qing,
Cui KeMing,
Zhu YuXian
Publication year - 2008
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/j.1744-7909.2008.00643.x
Subject(s) - arabidopsis , senescence , psychological repression , biology , transgene , microbiology and biotechnology , phenotype , arabidopsis thaliana , mutant , regulator , function (biology) , genetics , botany , gene , gene expression
Abstract 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 Ca 2+ 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 .