2014
DOI: 10.1111/tpj.12611
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Analysis of an Arabidopsis heat‐sensitive mutant reveals that chlorophyll synthase is involved in reutilization of chlorophyllide during chlorophyll turnover

Abstract: SUMMARYChlorophylls, the most abundant pigments in the photosynthetic apparatus, are constantly turned over as a result of the degradation and replacement of the damage-prone reaction center D1 protein of photosystem II. Results from isotope labeling experiments suggest that chlorophylls are recycled by reutilization of chlorophyllide and phytol, but the underlying mechanism is unclear. In this study, by characterization of a heat-sensitive Arabidopsis mutant we provide evidence of a salvage pathway for chloro… Show more

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Cited by 66 publications
(86 citation statements)
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“…When the normalized chlorophyll dephytylase activities were plotted against the levels of Chlides present in different lines after HS treatment, we observed a good correlation between these two variables (see correlation coefficients in Figure 6D). Although reduced CHLG level can also result in accumulation of Chlide a (Lin et al, 2014), the levels of CHLG in cld1-1 and transgenic lines were comparable to that of the wild type before and after HS treatment ( Figure 3A). Of note, the level of CHLG was reduced ;40% by HS treatment in all lines tested, with that of CLD1 (both the wild type and the G193D mutant) largely unchanged ( Figure 3A).…”
Section: Supraoptimal Cld1 Activity Leads To Chlide a And B Accumulatmentioning
confidence: 91%
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“…When the normalized chlorophyll dephytylase activities were plotted against the levels of Chlides present in different lines after HS treatment, we observed a good correlation between these two variables (see correlation coefficients in Figure 6D). Although reduced CHLG level can also result in accumulation of Chlide a (Lin et al, 2014), the levels of CHLG in cld1-1 and transgenic lines were comparable to that of the wild type before and after HS treatment ( Figure 3A). Of note, the level of CHLG was reduced ;40% by HS treatment in all lines tested, with that of CLD1 (both the wild type and the G193D mutant) largely unchanged ( Figure 3A).…”
Section: Supraoptimal Cld1 Activity Leads To Chlide a And B Accumulatmentioning
confidence: 91%
“…In a previous effort to identify new thermotolerance components in Arabidopsis, several dlt mutant alleles were isolated, and the genetic identities of dlt1-1, dlt1-2, and dlt4-1 (or chlg1-1) were revealed (Wu et al, 2013;Lin et al, 2014). In this study, we characterized and cloned the dlt3-1 allele, which we renamed cld1-1 based on its molecular function identified in this study.…”
Section: Cloning Of Cld1 Which Encodes An A/b-hydrolase Superfamily mentioning
confidence: 97%
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“…Because chlorophyll synthase has dual functions in phytol and chlorophyll synthesis Ischebeck et al, 2006;Lin et al, 2014), the impact of suppressed or enhanced CHLSYN expression on tocopherol concentrations could not be easily predicted. Our findings indicate that suppression of CHLSYN expression increases tocopherol concentrations in leaves, whereas enhanced expression of this gene reduces tocopherol concentrations in leaves (Fig.…”
Section: Discussionmentioning
confidence: 99%