Arabidopsis JMJ17 promotes cotyledon greening during de‐etiolation by repressing genes involved in tetrapyrrole biosynthesis in etiolated seedlings

2021 ◽  
Author(s):  
Md. Torikul Islam ◽  
Long‐Chi Wang ◽  
I‐Ju Chen ◽  
Kuan‐Lin Lo ◽  
Wan‐Sheng Lo
Keyword(s):  
Tetrapyrrole Biosynthesis ◽  
Etiolated Seedlings ◽  
Cotyledon Greening

scholarly journals Thioredoxin-dependent control balances the metabolic activities of tetrapyrrole biosynthesis

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Daniel Wittmann ◽  
Neha Sinha ◽  
Bernhard Grimm
Keyword(s):  
Environmental Changes ◽  
Nuclear Gene ◽  
Tetrapyrrole Biosynthesis ◽  
Nuclear Gene Expression ◽  
Light Levels ◽  
Organ Specific ◽  
Intracellular Compartments ◽  
The Face ◽  
Metabolic Activities ◽  
The Impact

AbstractPlastids are specialized organelles found in plants, which are endowed with their own genomes, and differ in many respects from the intracellular compartments of organisms belonging to other kingdoms of life. They differentiate into diverse, plant organ-specific variants, and are perhaps the most versatile organelles known. Chloroplasts are the green plastids in the leaves and stems of plants, whose primary function is photosynthesis. In response to environmental changes, chloroplasts use several mechanisms to coordinate their photosynthetic activities with nuclear gene expression and other metabolic pathways. Here, we focus on a redox-based regulatory network composed of thioredoxins (TRX) and TRX-like proteins. Among multiple redox-controlled metabolic activities in chloroplasts, tetrapyrrole biosynthesis is particularly rich in TRX-dependent enzymes. This review summarizes the effects of plastid-localized reductants on several enzymes of this pathway, which have been shown to undergo dithiol-disulfide transitions. We describe the impact of TRX-dependent control on the activity, stability and interactions of these enzymes, and assess its contribution to the provision of adequate supplies of metabolic intermediates in the face of diurnal and more rapid and transient changes in light levels and other environmental factors.

scholarly journals In Planta Determination of the mRNA-Binding Proteome of Arabidopsis Etiolated Seedlings

2016 ◽  
Vol 28 (10) ◽  
pp. 2435-2452 ◽  
Author(s):  
Marlene Reichel ◽  
Yalin Liao ◽  
Mandy Rettel ◽  
Chikako Ragan ◽  
Maurits Evers ◽  
...  
Keyword(s):  
In Planta ◽  
Etiolated Seedlings ◽  
Mrna Binding

Two native types of phytochrome A, phyAʹ and phyAʺ, differ by the state of phosphorylation at the N-terminus as revealed by fluorescence investigations of the Ser/Ala mutant of rice phyA expressed in transgenic Arabidopsis

2018 ◽  
Vol 45 (2) ◽  
pp. 150 ◽  
Author(s):  
Vitaly A. Sineshchekov ◽  
Larissa A. Koppel ◽  
Cordelia Bolle
Keyword(s):  
Transgenic Arabidopsis ◽  
Emission Spectra ◽  
Total Content ◽  
The State ◽  
Serine Phosphorylation ◽  
Phytochrome A ◽  
Wild Type ◽  
Etiolated Seedlings ◽  
Pre Treatment

Phytochrome A (phyA) mediates different photoresponses what may be connected with the existence of its two types, phyAʹ and phyAʹʹ, differing by spectroscopic, photochemical and functional properties. We investigated a role of phyA phosphorylation in their formation turning to transgenic Arabidopsis thaliana (L. Heynh.) phyA or phyAphyB mutants overexpressing rice wild-type phyA (phyA WT) or mutant phyA (phyA SA) with the first 10 serines substituted by alanines. This prevents phyA phosphorylation at these sites and modifies photoresponses. Etiolated seedlings were employed and phyA parameters were evaluated with the use of low temperature fluorescence spectroscopy and photochemistry. Germination of seeds was induced by white light (WL) pre-treatment for 15 min or 3 h. Emission spectra of rice phyA WT and phyA SA were similar and their total content was comparable. However, the phyAʹ/phyAʹʹ proportion in phyA WT was high and varied with the duration of the WL pre-treatment, whereas in phyA SA it was substantially shifted towards phyAʹʹ and did not depend on the pre-illumination. This suggests that phyA SA comprises primarily or exclusively the phyAʹʹ pool and supports the notion that the two phyA types differ by the state of serine phosphorylation. phyAʹʹ was also found to be much more effective in the germination induction than phyAʹ.

scholarly journals Thioredoxin and NADPH-Dependent Thioredoxin Reductase C Regulation of Tetrapyrrole Biosynthesis

2017 ◽  
Vol 175 (2) ◽  
pp. 652-666 ◽  
Author(s):  
Qingen Da ◽  
Peng Wang ◽  
Menglong Wang ◽  
Ting Sun ◽  
Honglei Jin ◽  
...  
Keyword(s):  
Thioredoxin Reductase ◽  
Tetrapyrrole Biosynthesis

scholarly journals Eco-friendly plant growth and development regulators on the basis of derivatives 1,2,4-triazines

2021 ◽  
Vol 36 ◽  
pp. 02003
Author(s):  
E.A. Builova ◽  
A.K. Mazitova ◽  
G.K. Aminova ◽  
I.I. Zaripov ◽  
A.H. Alibakova
Keyword(s):  
Plant Growth ◽  
Growth And Development ◽  
Target Product ◽  
Optimal Conditions ◽  
Laboratory Studies ◽  
Plant Growth And Development ◽  
Effect Of Solvents ◽  
Etiolated Seedlings ◽  
Working Solution ◽  
Derivatives Of

The article considers the application of plant growth and development regulators, in particular, derivatives of asymmetric triazines. A method for obtaining hexahydro-1,2,4-triazinone-3 is given. Optimal conditions for the reaction of 1,2-dichloroethane with semicarbazide are determined: reaction time, process temperature, and the effect of solvents on the yield of the target product. The results of laboratory and vegetation tests of 1,2,4-triazinone-3 for biological activity are presented. Laboratory studies were carried out on seeds of wheat, cucumbers, radish and vetch, which were laid out in Petri dishes and poured with a working solution, the concentration of the drug is 1, 10 mg/l. Two days later, the length and weight of etiolated seedlings were determined. Vegetation tests were carried out on seeds of barley, wheat and rye with a concentration of 10 mg/l. After two weeks, the length and weight of the plants were measured.

Chilling-induced chlorosis in maize (Zea mays)

1985 ◽  
Vol 63 (4) ◽  
pp. 711-715 ◽  
Author(s):  
R. Hodgins ◽  
R. B. van Huystee
Keyword(s):  
Zea Mays ◽  
Chlorophyll Content ◽  
Sweet Corn ◽  
Aminolevulinic Acid ◽  
Chlorophyll Synthesis ◽  
Carotenoid Content ◽  
Control Tissue ◽  
Etiolated Seedlings ◽  
Chilling Temperatures ◽  
And Control

The effect of chilling temperatures on the porphyrin pathway leading to chlorophyll was studied in Seneca Chief hybrid sweet corn. One-week-old seedlings grown at 28 °C in a 14 h light: 10 h dark photoperiod synthesize negligible amounts of chlorophyll when exposed to 12 °C for a subsequent 6 d. When the chilled plant is then brought back to 28 °C, chlorophyll synthesis is restored to control levels. Little difference in carotenoid content was detected between chill-stressed and control tissue even after 4 d of stress. Small differences in the chlorophyll content per 106 chloroplasts could be detected between stressed and control seedlings. Etiolated seedlings synthesize negligible amounts of chlorophyll or its precursors when illuminated at 12 °C. Incubation of tissue with aminolevulinic acid at various temperatures from 12 to 22 °C resulted in an accumulation of precursors comparable to 28 °C control tissue. The ability of etiolated tissue to accumulate aminolevulinic acid was negligible when illuminated at 12 °C as compared with that in tissue illuminated at 28 °C.

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