1. The Mystery of Mendel's Stay-Green: Magnesium Stays Chelated in Chlorophylls 
Junyi Chen, Guodong Ren, Benke Kuai 
Molecular Plant 
Volume 9, Issue 12, Pages (December 2016)
DOI: /j.molp
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2. Figure 1
Major Chlorophyll Catabolic Steps and Senescent Phenotypes of SGR/NYE Mutants and their Overexpression Lines.
(A) The final step of chlorophyll (Chl) biogenesis and major steps of Chl catabolism in the mesophyll cell (Christ and Hörtensteiner, 2014). SGR/NYE dechelate Mg from Chl a, whereas SGRL releases Mg from Chlide a, converting Chlide a to Pheide a (Shimoda et al., 2016). Chlide, chlorophyllide; Chl, chlorophyll; Phein, pheophytin; Pheide, pheophorbide; RCC, red Chl catabolite; pFCC, primary fluorescent Chl catabolite; NCCs, nonfluorescent Chl catabolites; DNCCs, dioxobilin-type nonfluorescent Chl catabolites; SGR/NYE, STAY-GREEN/NON-YELLOWING; SGRL, SGR-LIKE; CS, Chl synthase; CAO; Chlide a oxygenase; CBR, Chl b reductase; HCAR, 7-hydroxymethyl Chl a reductase; PPH, pheophytin pheophorbide hydrolase; PAO, Pheide a oxygenase; RCCR, RCC reductase.
(B) Cartoon pictures illustrate the leaf senescent phenotypes of SGR/NYE mutants. A severe stay-green phenotype of nye1 nye2 is compared with a partial stay-green of nye1-1 and an unobvious stay-green of nye2-1, indicating the synergistic action in Chl degradation between SGR1/NYE1 and SGR2/NYE2.
(C) Cartoon pictures illustrate a yellowing/bleaching gradient on the leaves of SGR/NYE or SGRL overexpressing lines. Younger leaves display a stronger yellowing/bleaching phenotype, which might be caused by a more severely disrupted/reduced supply of Chl a in the younger leaves.
Molecular Plant 2016 9, DOI: ( /j.molp )
Copyright © 2016 The Author Terms and Conditions