J Integr Plant Biol. ›› 2008, Vol. 50 ›› Issue (4): 475-483.DOI: 10.1111/j.1744-7909.2008.00643.x

Special Issue: Cell Biology and Functions

• Development & Photosynthesis • Previous Articles     Next Articles

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

Da-Yong Wang, Qing Li, Ke-Ming Cui and Yu-Xian Zhu   

  • Received:2006-10-24 Accepted:2006-12-19

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 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.

Key words: PPF1, plant senescence, TFL1, target, Arabidopsis

Editorial Office, Journal of Integrative Plant Biology, Institute of Botany, CAS
No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Tel: +86 10 6283 6133 Fax: +86 10 8259 2636 E-mail: jipb@ibcas.ac.cn
Copyright © 2021 by the Institute of Botany, the Chinese Academy of Sciences
Online ISSN: 1744-7909 Print ISSN: 1672-9072 CN: 11-5067/Q
备案号:京ICP备16067583号-22