Research Progress in the Interconversion, Turnover and Degradation of Chlorophyll

Hu, Xueyun; Gu, Tongyu; Khan, Imran; Zada, Ahmad; Jia, Ting

doi:10.3390/cells10113134

Cited by 37 publications

(34 citation statements)

References 95 publications

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“…Compared with wild type embryos, most genes involved in photosystem I ( OsPSA s), photosystem II ( OsPSB s), and light-harvesting complex ( OsLHCAs and OsLHCBs ) (Ben-Shem et al, 2003 ; Gao et al, 2018 ) were synergistically upregulated in Oslec1-1 embryos ( Figure 5A ). In addition, several DEGs involved in chloroplast development, as well as chlorophyll biosynthesis and degradation (Bollivar, 2006 ; Hu et al, 2021 ) were also upregulated, such as OsSGRL, OsPORA, OsPORB , and OsNYC4 ( Figure 5A ). Chloroplast biosynthesis genes are in the majority, and the OsPORA with the largest increase is chloroplast biosynthesis related.…”

Section: Resultsmentioning

confidence: 99%

Rice LEAFY COTYLEDON1 Hinders Embryo Greening During the Seed Development

Guo

Zhang

et al. 2022

Front. Plant Sci.

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LEAFY COTYLEDON1 (LEC1) is the central regulator of seed development in Arabidopsis, while its function in monocots is largely elusive. We generated Oslec1 mutants using CRISPR/Cas9 technology. Oslec1 mutant seeds lost desiccation tolerance and triggered embryo greening at the early development stage. Transcriptome analysis demonstrated that Oslec1 mutation altered diverse hormonal pathways and stress response in seed maturation, and promoted a series of photosynthesis-related genes. Further, genome-wide identification of OsLEC1-binding sites demonstrated that OsLEC1 bound to genes involved in photosynthesis, photomorphogenesis, as well as abscisic acid (ABA) and gibberellin (GA) pathways, involved in seed maturation. We illustrated an OsLEC1-regulating gene network during seed development, including the interconnection between photosynthesis and ABA/GA biosynthesis/signaling. Our findings suggested that OsLEC1 acts as not only a central regulator of seed maturation but also an inhibitor of embryo greening during rice seed development. This study would provide new understanding for the OsLEC1 regulatory mechanisms on photosynthesis in the monocot seed development.

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Section: Resultsmentioning

confidence: 99%

Rice LEAFY COTYLEDON1 Hinders Embryo Greening During the Seed Development

Guo

Zhang

et al. 2022

Front. Plant Sci.

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“…The lipid group of the chloroplast membrane is unique and mainly consists of uncharged monogalactosyl diacylglycerol (MGDG) and digalactosyl diacylglycerol (DGDG) [ 26 , 27 ]. It has been shown that when MGDG is lacking, the membrane energetics and photoprotection are impaired [ 28 ]; whereas the deficiency of DGDG leads to the dissociation of extrinsic proteins of the photosystem II (PSII) reaction center complex [ 29 ]. The photosynthetic electron transport chain is located in the vesicle-like membrane and consists of photosystem II (PSII), cytochrome (Cytb6f), photosystem I (PSI), plastid quinone (PQ) and plastid cyanidin (Pc) [ 27 ].…”

Section: Discussionmentioning

confidence: 99%

Involvement of Phospholipase C in Photosynthesis and Growth of Maize Seedlings

Wei

Liu

et al. 2022

Genes

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Phospholipase C is an enzyme that catalyzes the hydrolysis of glycerophospholipids and can be classified as phosphoinositide-specific PLC (PI-PLC) and non-specific PLC (NPC), depending on its hydrolytic substrate. In maize, the function of phospholipase C has not been well characterized. In this study, the phospholipase C inhibitor neomycin sulfate (NS, 100 mM) was applied to maize seedlings to investigate the function of maize PLC. Under the treatment of neomycin sulfate, the growth and development of maize seedlings were impaired, and the leaves were gradually etiolated and wilted. The analysis of physiological and biochemical parameters revealed that inhibition of phospholipase C affected photosynthesis, photosynthetic pigment accumulation, carbon metabolism and the stability of the cell membrane. High-throughput RNA-seq was conducted, and differentially expressed genes (DEGS) were found significantly enriched in photosynthesis and carbon metabolism pathways. When phospholipase C activity was inhibited, the expression of genes related to photosynthetic pigment accumulation was decreased, which led to lowered chlorophyll. Most of the genes related to PSI, PSII and TCA cycles were down-regulated and the net photosynthesis was decreased. Meanwhile, genes related to starch and sucrose metabolism, the pentose phosphate pathway and the glycolysis/gluconeogenesis pathway were up-regulated, which explained the reduction of starch and total soluble sugar content in the leaves of maize seedlings. These findings suggest that phospholipase C plays a key role in photosynthesis and the growth and development of maize seedlings.

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“…In these experiments, the increase in Chl contents detected in all the shaded species demonstrated the dynamic ability of plants to maximize the light-harvesting capacity in low light. On the other hand, the lower Chl contents detected in the sun-adapted tree leaves is likely aimed to prevent possible photoinhibition of photosynthesis under excessive light, especially around midday (Jason et al 2004;Dai et al 2009;Hu et al 2021).…”

Section: Light Quantity and Quality Influenced The Leaf Pigment Contentmentioning

confidence: 99%

Differences in pigment circadian rhythmicity in green- and red-leafed tree species in the sun and shade

et al. 2022

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Light flux and quality are crucial factor for setting endogenous plant circadian rhythms. Evaluating the daily rhythmicity of leaf chlorophyll content is an effective method to monitor the plant physiological endogenous clock in response to environmental signals such as light availability/quality. Here, we used a leaf-clip sensor to monitor diurnal rhythms in the content of chlorophyll and flavonoids such as flavonols and anthocyanins in three green- (Ailanthus altissima, Tilia platyphyllos and Platanus × acerifolia) and two red-leafed (Acer platanoides cv. Crimson King and Prunus cerasifera var. pissardii) tree species, adapted to sun (L) or shade (S). Significant differences in chlorophyll content (Chl) and its variations during the day were observed among treatments in all the analyzed species. S-plants had more Chl than L-plants irrespective of leaf color, and Chl variations were more distinct during the day than in L-plants. In particular, contents were lowest in the morning (9:00) and in the middle of the day (at 12:00 and 15:00), and the highest at dusk (21:00). The less evident trends in Chl variation in L-plants were attributed to a decrease in Chl content in high light, which likely masked any increases in the shaded counterparts during the afternoon. Daily flavonol levels did not vary no notably during the day. In sun-exposed red leaves, anthocyanins partially screened mesophyll cells from incident light, and its levels were similar to the Chl dynamics in the shaded counterparts. This study provides new bases for further work on endogenous rhythms of plant pigments and improves our understanding of plant physiology in the context of day/night rhythmicity.

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Research Progress in the Interconversion, Turnover and Degradation of Chlorophyll

Cited by 37 publications

References 95 publications

Rice LEAFY COTYLEDON1 Hinders Embryo Greening During the Seed Development

Rice LEAFY COTYLEDON1 Hinders Embryo Greening During the Seed Development

Involvement of Phospholipase C in Photosynthesis and Growth of Maize Seedlings

Differences in pigment circadian rhythmicity in green- and red-leafed tree species in the sun and shade

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