Photoregulation of the Greening Process of Wheat Seedlings Grown in Red Light*

Sood, Suchi; Gupta, Varsha; Tripathy, Baishnab C.

doi:10.1007/s11103-005-8880-2

Cited by 52 publications

(51 citation statements)

References 60 publications

(60 reference statements)

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“…Chl reduction was observed under red light as a result of a decrease in aminolevulinic acid (Tanaka et al, 1998;Sood et al, 2005), PPIX, MGPP, and Pchlide (Fan et al, 2013). In our study, porphyrin levels were not reduced by red light (Fig.…”

Section: Discussionsupporting

confidence: 43%

“…Blue light induces higher Chl a/b ratios (Rivkin, 1989;Demarsac et al, 1993;Chen et al, 2014;Hoffmann et al, 2015) and greater accumulations of Chl (Kurilčik et al, 2008;Poudel et al, 2008;Hoffmann et al, 2016). Red light inhibits Chl synthesis at lower concentrations of Chl and precursors like 5-aminolevulinic acid (Tanaka et al, 1998;Sood et al, 2005), protoporphyrin IX (PPIX), magnesium protoporphyrin IX (MGPP), and protochlorophyllide (Pchlide) (Fan et al, 2013). Moreover, the mole percentages of PPIX, MGPP, and Pchlide also respond to various physiological conditions and genotypes Hsu et al, 2011;Huang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Light Quality on the Chlorophyll Degradation Pathway in Rice Seedling Leaves

Chen

Lin

Huang

et al. 2016

Not Bot Horti Agrobo

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The objective of this study was to investigate the dynamics of chlorophyll (Chl), biosynthetic intermediates (protoporphyrin IX, magnesium protoporphyrin IX, and protochlorophyllide), degradation intermediates [chlorophyllide (Chlide), pheophytin (Phe), and pheophorbide (Pho)], and carotenoids (Car) in leaves of rice seedlings. Two rice varieties, 'Taichung Shen 10' ('TCS10') and 'IR1552', were grown under different light quality conditions controlled by light emitting diodes (LED). Lighting treatments for rice seedlings were included by red (R), blue (B), green (G), and red + blue (RB), with fluorescent lighting (FL) as the control and photosynthetic photon flux density being set at 105 μmol m -2 s -1 . The results show that lower levels of Chl and Car in leaves were detected under G lighting, and light quality did not mediate porphyrins in biosynthetic pathways. Rice seedling leaves took Chl→Phe→Pho and Chl→Chlide→Pho as the major and minor degradation routes, respectively. Furthermore, higher Phe/Chlide ratios were observed under G and FL lighting conditions, indicating that green-enriched environments can up-regulate the minor degradation route in leaves.

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Section: Discussionsupporting

confidence: 43%

Section: Introductionmentioning

confidence: 99%

Effects of Light Quality on the Chlorophyll Degradation Pathway in Rice Seedling Leaves

Chen

Lin

Huang

et al. 2016

Not Bot Horti Agrobo

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“…This is consistent with the effect of light quality on the chlorophyll a/b ratio in cucumber leaves (Hogewoning et al, 2010b). Several studies suggested that red light inhibited the formation of chlorophyll because 5-aminolevulinic acid, a biosynthetic precursor to chlorophyll, was reduced under red light (Tanaka et al, 1998;Sood et al, 2005). Blue light was reported to play a crucial role in the formation and accumulation of chlorophylls (Dougher and Bugbee, 1997;Li et al, 2012;Fan et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Morphological and Physiological Responses of <i>Morus alba</i> Seedlings under Different Light Qualities

Dai

Guang-yu

2016

Not Bot Horti Agrobo

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Light quality can influence the photosynthetic characteristics, morphology and physiological processes of plants. To investigate the effects of different light qualities (white light, W; red light, R; blue light, B; mixture of red and blue light, RB) of light emitting diodes (LEDs) and white cold fluorescent lamp on the growth and morphology of fruiting mulberry plants (Morus alba L. cv. 'Longsang No.1'), fruiting mulberry plants were grown under different light qualities: W, R, B and RB of the same photosynthetic photo flux density (PPFD; 100 μmol m -2 s -1 ) for 20 d. Our results showed that stem length and leaf area of plants grown under R were the highest. However, stem length and leaf area of plants grown under B were lowest. Dry weights (DW), leaf mass per area (LMA), chlorophyll a/b ratio, soluble protein content, sucrose and starch content, and total leaf nitrogen (N) content of plants grown under R were the lowest. Net photosynthetic rate (Pn), stomatal conductance (gs), and actual photochemical efficiency of PSII (ΦPSII) of plants grown under RB were similar to plants grown under W. Net photosynthetic rate (Pn) and ΦPSII of plants grown under R and B were lower than plants grown under W and RB. Antioxidant enzymes activity of plants grown under R, RB and B were higher than plants grown under W. The number of leaf stomata, leaf thickness, palisade tissue length and spongy tissue length were the lowest in plants grown under R. The number of leaf stomata, leaf thickness and palisade tissue length of plants grown under RB and B were higher than plants grown under R. The results of this study indicate that a certain ratio of mixed red and blue LEDs light can reduce adverse effects of monochromatic red and blue LEDs light on fruiting mulberry growth and development.

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“…In previous studies, we have shown rice and wheat seedling grown with their shoot bottom exposed to constant red light or when given in the form of light-dark cycles do not accumulate chlorophyll (Chl) (Gupta et al 2010;Roy et al 2013;Sood et al 2005;Sood et al 2004;Tripathy and Brown 1995). Red light perceived by the shoot bottom downregulates the protein and gene expression of the enzymes involved in the biosynthesis of tetrapyrroles (Sood et al 2005;Sood et al 2004;Tripathy and Brown 1995).…”

Section: Introductionmentioning

confidence: 99%

“…Red light perceived by the shoot bottom downregulates the protein and gene expression of the enzymes involved in the biosynthesis of tetrapyrroles (Sood et al 2005;Sood et al 2004;Tripathy and Brown 1995). This red-light-induced suppression of photomorphogenesis is a red high-irradiance response (red HIR) of PhyA (Roy et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Light-hormone interaction in the red-light-induced suppression of photomorphogenesis in rice seedlings

Roy

Tripathy

2015

Protoplasma

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Red light perceived by the shoot bottom suppresses photomorphogenesis in rice seedlings mediated by phytochrome A. Shoots of these seedlings grown in red light having their shoot bottom exposed were deficient in chlorophyll and accumulated high concentration of trans-zeatin riboside. However, reduced presence of isopentynyl adenosine, dihydrozeatin riboside was observed in shoots of red-light-grown non-green seedlings in comparison to green seedling. The message abundance of cytokinin receptor (OsHK5), transporters (OsENT1, OsENT2), and response regulators (OsRR4, OsRR10) was downregulated in these red-light-grown non-green seedlings. Attenuation of greening process was reversed by application of exogenous cytokinin analogue, benzyladenine, or supplementing red light with blue light. In the same vein, the suppression of gene expression of cytokinin receptor, transporters, and type-A response regulators was reversed in red-light-grown seedlings treated with benzyladenine suggesting that the disarrayed cytokinin (CK) signaling cascade is responsible for non-greening of seedlings grown in red light. The reversal of red-light-induced suppression of photomorphogenesis by blue light and benzyladenine demonstrates the interaction of light and cytokinin signaling cascades in the regulation of photomorphogenesis. Partial reversal of greening process by exogenous application of benzyladenine suggests, apart from CKs perception, transportation and responsiveness, other factors are also involved in modulation of suppression of photomorphogenesis by red light.

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Photoregulation of the Greening Process of Wheat Seedlings Grown in Red Light*

Cited by 52 publications

References 60 publications

Effects of Light Quality on the Chlorophyll Degradation Pathway in Rice Seedling Leaves

Effects of Light Quality on the Chlorophyll Degradation Pathway in Rice Seedling Leaves

Morphological and Physiological Responses of <i>Morus alba</i> Seedlings under Different Light Qualities

Light-hormone interaction in the red-light-induced suppression of photomorphogenesis in rice seedlings

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