Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence[W]

@article{Kusaba2007RiceNC,
  title={Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence[W]},
  author={Makoto Kusaba and Hisashi Ito and Ryouhei Morita and Shuichi Iida and Yutaka Sato and Masaru Fujimoto and Shinji Kawasaki and Ryouichi Tanaka and Hirohiko Hirochika and Minoru Nishimura and Ayumi Tanaka},
  journal={The Plant Cell Online},
  year={2007},
  volume={19},
  pages={1362 - 1375}
}
Chlorophyll degradation is an aspect of leaf senescence, which is an active process to salvage nutrients from old tissues. non-yellow coloring1 (nyc1) is a rice (Oryza sativa) stay-green mutant in which chlorophyll degradation during senescence is impaired. Pigment analysis revealed that degradation of not only chlorophylls but also light-harvesting complex II (LHCII)–bound carotenoids was repressed in nyc1, in which most LHCII isoforms were selectively retained during senescence… Expand
Two short-chain dehydrogenase/reductases, NON-YELLOW COLORING 1 and NYC1-LIKE, are required for chlorophyll b and light-harvesting complex II degradation during senescence in rice.
TLDR
Analysis of the nyc1 mutant, which shows the stay-green phenotype, and the nol mutant in rice, suggest that NOL and NYC1 are co-localized in the thylakoid membrane and act in the form of a complex as a chlorophyll b reductase in rice. Expand
A novel protein RLS1 with NB-ARM domains is involved in chloroplast degradation during leaf senescence in rice.
TLDR
This study identified a previously uncharacterized NB-ARM protein involved in PCD during plant growth and development, providing a unique tool for dissecting possible autophagy-mediatedPCD during senescence in plants. Expand
Rice Senescence-Induced Receptor-Like Kinase (OsSRLK) Is Involved in Phytohormone-Mediated Chlorophyll Degradation
TLDR
Findings indicate that rice senescence-induced receptor-like kinase (OsSRLK) may degrade chlorophyll by participating in a phytohormone-mediated pathway. Expand
Defect in non-yellow coloring 3, an alpha/beta hydrolase-fold family protein, causes a stay-green phenotype during leaf senescence in rice.
TLDR
A new stay-green mutant in rice, nyc3, which encodes a plastid-localizing alpha/beta hydrolase-fold family protein with an esterase/lipase motif and the possible function of NYC3 in the regulation of chlorophyll degradation is discussed. Expand
Rice 7-Hydroxymethyl Chlorophyll a Reductase Is Involved in the Promotion of Chlorophyll Degradation and Modulates Cell Death Signaling
TLDR
It is shown that an oshcar knockout mutant exhibits persistent green leaves during both dark-induced and natural senescence, and accumulates 7-HMC a and pheophorbide a (Pheo a) in green leaf blades, and HCAR-overexpressing plants were more tolerant to reactive oxygen species than wild type. Expand
Functional characterization of the chlorophyll b reductase gene NYC1 associated with chlorophyll degradation and photosynthesis in Zoysia japonica
Abstract Chlorophyll plays essential roles in photosynthesis and its degradation should be regulated precisely. Chlorophyll b reductase encoded by the gene NYC1 is responsible for catalyzingExpand
NYC4, the rice ortholog of Arabidopsis THF1, is involved in the degradation of chlorophyll - protein complexes during leaf senescence.
TLDR
Western blot analysis revealed that, in nyc4-1, the PSII core subunits D1 and D2 were significantly retained during leaf senescence in comparison with wild-type and other non-functional stay-green mutants, including sgr-2, a mutant of the key regulator of chlorophyll degradation SGR. Expand
7-Hydroxymethyl chlorophyll a reductase functions in metabolic channeling of chlorophyll breakdown intermediates during leaf senescence.
TLDR
It is shown that in Arabidopsis, HCAR-overexpressing plants exhibited accelerated leaf yellowing and, conversely, hcar mutants stayed green during dark-induced senescence, indicating that HCAR is a component of the proposed SGR-CCE-LHCII complex, which acts in chlorophyll breakdown. Expand
Chlorophyll b Reductase Plays an Essential Role in Maturation and Storability of Arabidopsis Seeds1[W]
TLDR
Electron microscopic studies indicated that many small oil bodies appeared in the embryonic cotyledons of the nyc1/nol mutant; this finding indicates that the retention of chlorophyll affects the development of organelles in embryonic cells. Expand
Characterization and transcriptional regulation of chlorophyll b reductase gene NON-YELLOW COLORING 1 associated with leaf senescence in perennial ryegrass (Lolium perenne L.)
TLDR
The current result laid the groundwork for future in-depth analysis of the molecular regulation of LpNYC1 and Chl metabolism during leaf senescence in perennial grass species. Expand
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