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Trends Plant Sci. 2009 Mar;14(3):155-62. doi: 10.1016/j.tplants.2009.01.002. Epub 2009 Feb 23.

Stay-green regulates chlorophyll and chlorophyll-binding protein degradation during senescence.

Author information

1
Zurich-Basel Plant Science Center, Institute of Plant Biology, University of Zurich, CH-8008 Zurich, Switzerland. shorten@botinst.uzh.ch

Abstract

Stay-green mutants are delayed in leaf senescence and have been identified from different plant species, including many crops. Functional stay-greens have the potential to increase plant productivity. In cosmetic stay-greens, however, retention of chlorophyll during senescence is uncoupled from a decline of photosynthetic capacity in these mutants. For many cosmetic stay-green mutants, including Gregor Mendel's famous green cotyledon pea variety, molecular defects were recently identified in orthologous stay-green genes. Stay-green genes encode members of a new family of chloroplast-located proteins, which are likely to function in dismantling of photosynthetic chlorophyll-apoprotein complexes. Their activity is considered as a prerequisite for both chlorophyll and apoprotein degradation during senescence.

PMID:
19237309
DOI:
10.1016/j.tplants.2009.01.002
[Indexed for MEDLINE]

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