@article{MuntahaLiCompartetal.2022,
  author    = {Muntaha, Sidratul Nur and Li, Xiaoping and Compart, Julia and Apriyanto, Ardha and Fettke, J{\"o}rg},
  title     = {Carbon pathways during transitory starch degradation in Arabidopsis differentially affect the starch granule number and morphology in the dpe2/phs1 mutant background},
  series = {Plant physiology and biochemistry : an official journal of the Federation of European Societies of Plant Physiology},
  volume    = {180},
  journal   = {Plant physiology and biochemistry : an official journal of the Federation of European Societies of Plant Physiology},
  publisher = {Elsevier},
  address   = {Paris},
  issn      = {0981-9428},
  doi       = {10.1016/j.plaphy.2022.03.033},
  pages     = {35 -- 41},
  year      = {2022},
  abstract  = {The Arabidopsis knockout mutant lacking both the cytosolic disproportionating enzyme 2 (DPE2) and the plastidial phosphorylase (PHS1) had a dwarf-growth phenotype, a reduced and uneven distribution of starch within the plant rosettes, and a lower starch granule number per chloroplast under standard growth conditions. In contrast, a triple mutant impaired in starch degradation by its additional lack of the glucan, water dikinase (GWD) showed improved plant growth, a starch-excess phenotype, and a homogeneous starch distribution. Furthermore, the number of starch granules per chloroplast was increased and was similar to the wild type. We concluded that ongoing starch degradation is mainly responsible for the observed phenotype of dpe2/phs1. Next, we generated two further triple mutants lacking either the phosphoglucan, water dikinase (PWD), or the disproportionating enzyme 1 (DPE1) in the background of the double mutant. Analysis of the starch metabolism revealed that even minor ongoing starch degradation observed in dpe2/phs1/pwd maintained the double mutant phenotype. In contrast, an additional blockage in the glucose pathway of starch breakdown, as in dpe2/phs1/ dpe1, resulted in a nearly starch-free phenotype and massive chloroplast degradation. The characterized mutants were discussed in the context of starch granule formation.},
  language  = {en}
}
@article{RaufArifDortayetal.2013,
  author    = {Rauf, Mamoona and Arif, Muhammad and Dortay, Hakan and Matallana-Ramirez, Lilian P. and Waters, Mark T. and Nam, Hong Gil and Lim, Pyung-Ok and M{\"u}ller-R{\"o}ber, Bernd and Balazadeh, Salma},
  title     = {ORE1 balances leaf senescence against maintenance by antagonizing G2-like-mediated transcription},
  series = {EMBO reports},
  volume    = {14},
  journal   = {EMBO reports},
  number    = {4},
  publisher = {Nature Publ. Group},
  address   = {London},
  issn      = {1469-221X},
  doi       = {10.1038/embor.2013.24},
  pages     = {382 -- 388},
  year      = {2013},
  abstract  = {Leaf senescence is a key physiological process in all plants. Its onset is tightly controlled by transcription factors, of which NAC factor ORE1 (ANAC092) is crucial in Arabidopsis thaliana. Enhanced expression of ORE1 triggers early senescence by controlling a downstream gene network that includes various senescence-associated genes. Here, we report that unexpectedly ORE1 interacts with the G2-like transcription factors GLK1 and GLK2, which are important for chloroplast development and maintenance, and thereby for leaf maintenance. ORE1 antagonizes GLK transcriptional activity, shifting the balance from chloroplast maintenance towards deterioration. Our finding identifies a new mechanism important for the control of senescence by ORE1.},
  language  = {en}
}