Photosynthate partitioning to starch in Arabidopsis thaliana is insensitive to light intensity but sensitive to photoperiod due to a restriction on growth in the light in short photoperiods

2017 ◽  
Vol 40 (11) ◽  
pp. 2608-2627 ◽  
Author(s):  
Virginie Mengin ◽  
Eva-Theresa Pyl ◽  
Thiago Alexandre Moraes ◽  
Ronan Sulpice ◽  
Nicole Krohn ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Light Intensity ◽  
Photosynthate Partitioning

scholarly journals Uncovering the molecular signature underlying the light intensity-dependent root development in Arabidopsis thaliana

BMC Genomics ◽  
2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Sony Kumari ◽  
Sandeep Yadav ◽  
Debadutta Patra ◽  
Sharmila Singh ◽  
Ananda K. Sarkar ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Light Intensity ◽  
Root Development ◽  
Molecular Signature

scholarly journals Dissecting and modeling zeaxanthin- and lutein-dependent nonphotochemical quenching in Arabidopsis thaliana

2017 ◽  
Vol 114 (33) ◽  
pp. E7009-E7017 ◽  
Author(s):  
Michelle Leuenberger ◽  
Jonathan M. Morris ◽  
Arnold M. Chan ◽  
Lauriebeth Leonelli ◽  
Krishna K. Niyogi ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Light Intensity ◽  
Vascular Plants ◽  
Single Photon ◽  
Photon Counting ◽  
Nonphotochemical Quenching ◽  
Light Acclimation ◽  
Single Photon Counting ◽  
Photosynthetic Organisms ◽  
Psbs Protein

Photosynthetic organisms use various photoprotective mechanisms to dissipate excess photoexcitation as heat in a process called nonphotochemical quenching (NPQ). Regulation of NPQ allows for a rapid response to changes in light intensity and in vascular plants, is primarily triggered by a pH gradient across the thylakoid membrane (∆pH). The response is mediated by the PsbS protein and various xanthophylls. Time-correlated single-photon counting (TCSPC) measurements were performed on Arabidopsis thaliana to quantify the dependence of the response of NPQ to changes in light intensity on the presence and accumulation of zeaxanthin and lutein. Measurements were performed on WT and mutant plants deficient in one or both of the xanthophylls as well as a transgenic line that accumulates lutein via an engineered lutein epoxide cycle. Changes in the response of NPQ to light acclimation in WT and mutant plants were observed between two successive light acclimation cycles, suggesting that the character of the rapid and reversible response of NPQ in fully dark-acclimated plants is substantially different from in conditions plants are likely to experience caused by changes in light intensity during daylight. Mathematical models of the response of zeaxanthin- and lutein-dependent reversible NPQ were constructed that accurately describe the observed differences between the light acclimation periods. Finally, the WT response of NPQ was reconstructed from isolated components present in mutant plants with a single common scaling factor, which enabled deconvolution of the relative contributions of zeaxanthin- and lutein-dependent NPQ.

The impact of light intensity on metabolomic profile of Arabidopsis thaliana wild type and reticulata mutant by NMR spectroscopy

2018 ◽  
Vol 26 ◽  
pp. 170-178 ◽  
Author(s):  
Tahereh Jafari ◽  
Moona Rahikainen ◽  
Elina Puljula ◽  
Jari Sinkkonen ◽  
Saijaliisa Kangasjärvi
Keyword(s):  
Arabidopsis Thaliana ◽  
Nmr Spectroscopy ◽  
Light Intensity ◽  
Metabolomic Profile ◽  
Wild Type ◽  
The Impact

scholarly journals ERECTA controls low light intensity-induced differential petiole growth independent of Phytochrome B and Cryptochrome 2 action in Arabidopsis thaliana

2010 ◽  
Vol 5 (3) ◽  
pp. 284-286 ◽  
Author(s):  
Martijn van Zanten ◽  
L. Basten Snoek ◽  
Evelien van Eck-Stouten ◽  
Marcel C.G. Proveniers ◽  
Keiko U. Torii ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Light Intensity ◽  
Phytochrome B ◽  
Low Light ◽  
Low Light Intensity ◽  
Cryptochrome 2

scholarly journals Effects of Elevated CO2 on Sorbitol Partitioning in Sink and Source Apple Leaves

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 770E-770 ◽  
Author(s):  
Qi-yuan Pan ◽  
Bruno Quebedeaux
Keyword(s):  
Light Intensity ◽  
Elevated Co2 ◽  
Hplc Analysis ◽  
Soluble Sugars ◽  
Ambient Air ◽  
Photosynthate Partitioning ◽  
Apple Leaves

Apple and many other Rosaceae plants translocate sucrose as well as sorbitol. How photosynthates are partitioned between sorbitol and sucrose in the Rosaceae is not understood. This study was designed to examine the effects of elevated air CO2 on partitioning of sorbitol and other soluble sugars in sink and source apple leaves. Young `Gala' apple plants were exposed to the ambient air and 700, 1000, and 1600 μl·liter–1 of CO2 for 8 days under a light intensity of 928 μmol·m–2·s–1 with a 14-h day/10-h night cycle. Sorbitol, sucrose, glucose, and fructose concentration in sink and source leaves were determined by HPLC analysis. In source leaves, sorbitol was significantly increased, while sucrose was decreased as the air CO2 was elevated from 400 to 1600 μl·liter–1. The sorbitol/sucrose ratio varied from 1.31 in air and 2.26 at 1600 μl·liter–1 of CO2. In sink leaves, sorbitol concentration did not vary across the four CO2 levels; however, sucrose was higher at the three super-atmospheric CO2 levels. Our results suggest that increased photosynthesis via elevated CO2 favors photosynthate partitioning into sorbitol rather than sucrose. A mechanism for regulating this partitioning will be discussed.

Acclimation of Swedish and Italian ecotypes of Arabidopsis thaliana to light intensity

2017 ◽  
Vol 134 (2) ◽  
pp. 215-229 ◽  
Author(s):  
Jared J. Stewart ◽  
Stephanie K. Polutchko ◽  
William W. Adams ◽  
Barbara Demmig-Adams
Keyword(s):  
Arabidopsis Thaliana ◽  
Light Intensity

scholarly journals Low light intensity delays vegetative phase change in Arabidopsis thaliana

2021 ◽  
Author(s):  
Mingli Xu ◽  
Tieqiang Hu ◽  
R. Scott Poethig
Keyword(s):  
Arabidopsis Thaliana ◽  
Light Intensity ◽  
Phase Change ◽  
Shade Tolerance ◽  
Light Quality ◽  
Shade Avoidance ◽  
Low Light ◽  
Vegetative Phase ◽  
Master Regulators ◽  
Vegetative Phase Change

Plants that develop under low intensity light (LL) often display a phenotype known as the "shade tolerance syndrome (STS)". This syndrome is similar to the phenotype of plants in the juvenile phase of shoot development, but the basis for this similarity is unknown. We tested the hypothesis that the STS is regulated by the same mechanism that regulates the juvenile vegetative phase by examining the effect of LL on rosette development in Arabidopsis thaliana. We found that LL prolonged the juvenile vegetative phase and that this was associated with an increase the expression of the master regulators of vegetative phase change, miR156 and miR157, and a decrease in the expression of their SPL targets. Exogenous sucrose partially corrected the effect of LL on seedling development and miR156 expression. Our results suggest that the response of Arabidopsis to LL is mediated by an increase in miR156/miR157 expression and by factors that repress SPL gene expression independently of miR156/miR157, and is caused in part by a decrease in carbohydrate production. The effect of LL on vegetative phase change does not require the photoreceptors and transcription factors responsible for the shade avoidance syndrome, implying that light intensity and light quality regulate rosette development by different pathways.

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