Light energy partitioning and photoprotection from excess light energy in shade-tolerant plant Amorphophallus xiei under steady-state and fluctuating high light

2021 ◽  
Vol 43 (9) ◽  
Author(s):  
Jinyan Zhang ◽  
Shiqing Xie ◽  
Suo Yan ◽  
Wenguo Xu ◽  
Junwen Chen
Keyword(s):  
Steady State ◽  
High Light ◽  
Energy Partitioning ◽  
Light Energy ◽  
Tolerant Plant ◽  
Excess Light

scholarly journals Zeaxanthin and the Heat Dissipation of Excess Light Energy in Nerium oleander Exposed to a Combination of High Light and Water Stress

1988 ◽  
Vol 87 (1) ◽  
pp. 17-24 ◽  
Author(s):  
Barbara Demmig ◽  
Klaus Winter ◽  
Almuth Krüger ◽  
Franz-Christian Czygan
Keyword(s):  
Water Stress ◽  
Heat Dissipation ◽  
High Light ◽  
Light Energy ◽  
Nerium Oleander ◽  
Excess Light

THE INFLUENCE OF THE RATIO OF INCANDESCENT TO FLUORESCENT LIGHT ON THE FLOWERING RESPONSE OF MARQUIS WHEAT GROWN UNDER CONTROLLED CONDITIONS

1961 ◽  
Vol 41 (2) ◽  
pp. 418-427 ◽  
Author(s):  
D. J. C. Friend ◽  
V. A. Helson ◽  
J. E. Fisher
Keyword(s):  
Stem Elongation ◽  
High Light ◽  
Light Energy ◽  
Fluorescent Light ◽  
Floral Initiation ◽  
Incandescent Light ◽  
Flowering Response ◽  
Controlled Conditions ◽  
Floral Differentiation ◽  
Plant Level

When Marquis wheat is grown under artificial conditions, the main light energy (lamp watts) supplied by fluorescent light should be supplemented by at least 35 per cent of incandescent light in order to have a photoperiodic effect close to the maximal. Increasing the percentage up to 100 per cent resulted in slightly earlier flowering. This effect of incandescent light was caused, not by earlier floral initiation, but by an increase in the rate of stem elongation and a hastening of the later stages of floral differentiation. This action of incandescent light could not be replaced by substituting pink fluorescent for one-third of the white fluorescent lights.To obtain a photoperiodic effect equal to that of high light energy from combined fluorescent and incandescent bulbs, it is recommended that the daylength be extended by sufficient incandescent light to give an intensity of at least 50 ft.-c. at plant level.

Different strategies of acclimation of photosynthesis, electron transport and antioxidative activity in leaves of two cotton species to water deficit

2016 ◽  
Vol 43 (5) ◽  
pp. 448 ◽  
Author(s):  
Xiao-Ping Yi ◽  
Ya-Li Zhang ◽  
He-Sheng Yao ◽  
Hong-Hai Luo ◽  
Ling Gou ◽  
...  
Keyword(s):  
Electron Transport ◽  
Water Deficit ◽  
Heat Dissipation ◽  
Photosynthetic Apparatus ◽  
Light Energy ◽  
Photochemical Quenching ◽  
Antioxidant Systems ◽  
Mehler Reaction ◽  
Cotton Species ◽  
Excess Light

To better understand the adaptation mechanisms of the photosynthetic apparatus of cotton plants to water deficit conditions, the influence of water deficit on photosynthesis, chlorophyll a fluorescence and the activities of antioxidant systems were determined simultaneously in Gossypium hirsutum L. cv. Xinluzao 45 (upland cotton) and Gossypium barbadense L. cv. Xinhai 21 (pima cotton). Water deficit decreased photosynthesis in both cotton species, but did not decrease chlorophyll content or induce any sustained photoinhibition in either cotton species. Water deficit increased ETR/4 − AG, where ETR/4 estimates the linear photosynthetic electron flux and AG is the gross rate of carbon assimilation. The increase in ETR/4 − AG, which represents an increase in photorespiration and alternative electron fluxes, was particularly pronounced in Xinluzao 45. In Xinluzao 45, water deficit increased the activities of antioxidative enzymes, as well as the contents of reactive oxygen species (ROS), which are related to the Mehler reaction. In contrast, moderate water deficit particularly increased non-photochemical quenching (NPQ) in Xinhai 21. Our results suggest that Xinluzao 45 relied on enhanced electron transport such as photorespiration and the Mehler reaction to dissipate excess light energy under mild and moderate water deficit. Xinhai 21 used enhanced photorespiration for light energy utilisation under mild water deficit but, when subjected to moderate water deficit, possessed a high capacity for dissipating excess light energy via heat dissipation.

Responses of the photosynthetic electron transport system to excess light energy caused by water deficit in wild watermelon

2011 ◽  
Vol 142 (3) ◽  
pp. 247-264 ◽  
Author(s):  
Satoko Sanda ◽  
Kazuo Yoshida ◽  
Masayoshi Kuwano ◽  
Tadayuki Kawamura ◽  
Yuri Nakajima Munekage ◽  
...  
Keyword(s):  
Electron Transport ◽  
Water Deficit ◽  
Transport System ◽  
Photosynthetic Electron Transport ◽  
Light Energy ◽  
Electron Transport System ◽  
Excess Light

High Yield Achieved by Early-Maturing Rapeseed with High Light Energy and Temperature Production Efficiencies under Ideal Planting Density

Crop Science ◽  
2019 ◽  
Vol 59 (1) ◽  
pp. 351-362 ◽  
Author(s):  
Zhenghua Xu ◽  
Tao Luo ◽  
Na Rao ◽  
Liang Yang ◽  
Jiahuan Liu ◽  
...  
Keyword(s):  
High Light ◽  
Light Energy ◽  
Planting Density ◽  
High Yield ◽  
Early Maturing ◽  
Production Efficiencies

scholarly journals The influence of temperature, light energy and photoperiod on flowering of Brodiaea laxa Wats.

1969 ◽  
Vol 17 (3) ◽  
pp. 176-182
Author(s):  
E.J. Fortanier
Keyword(s):  
Flower Development ◽  
High Light ◽  
Light Energy ◽  
Light Conditions ◽  
Influence Of Temperature ◽  
Flower Production ◽  
Short Day ◽  
Light Intensities ◽  
Light Requirements

Temperature and light requirements for a satisfactory forcing of Brodiaea laxa 'Koningin Fabiola' were studied. Corms were planted under different temperature and light conditions in a phytotron and in different photoperiods in the open. Long days accelerated flower development and the termination of growth and enhanced corm formation. Considering both earliness and number of flowers, the most acceptable results with regard to flower production were obtained at 18 degrees C. in short photoperiods. Forcing at higher temperatures and in longer photoperiods resulted in a reduction in the number of flowers because of bud blasting. This also occurred when the natural short day was extended by high light intensities. Forced and retarded corms reacted similarly but the latter flowered sooner and more satisfactorily. Flowering was preceded under all conditions by corm formation and in longer photoperiods even by senescence of the leaves. Year-round production of flowers is possible if 25 cal./sq.cm./day of light energy or more are available.- Agric. Univ., Wageningen. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals UV-B photoreceptor-mediated protection of the photosynthetic machinery inChlamydomonas reinhardtii

2016 ◽  
Vol 113 (51) ◽  
pp. 14864-14869 ◽  
Author(s):  
Guillaume Allorent ◽  
Linnka Lefebvre-Legendre ◽  
Richard Chappuis ◽  
Marcel Kuntz ◽  
Thuy B. Truong ◽  
...  
Keyword(s):  
Photosynthetic Activity ◽  
Light Harvesting ◽  
Nonphotochemical Quenching ◽  
High Light ◽  
Light Energy ◽  
Light Harvesting Complex ◽  
Subsequent Exposure ◽  
Photosynthetic Machinery ◽  
Life On Earth ◽  
Energy Dependent

Life on earth is dependent on the photosynthetic conversion of light energy into chemical energy. However, absorption of excess sunlight can damage the photosynthetic machinery and limit photosynthetic activity, thereby affecting growth and productivity. Photosynthetic light harvesting can be down-regulated by nonphotochemical quenching (NPQ). A major component of NPQ is qE (energy-dependent nonphotochemical quenching), which allows dissipation of light energy as heat. Photodamage peaks in the UV-B part of the spectrum, but whether and how UV-B induces qE are unknown. Plants are responsive to UV-B via the UVR8 photoreceptor. Here, we report in the green algaChlamydomonas reinhardtiithat UVR8 induces accumulation of specific members of the light-harvesting complex (LHC) superfamily that contribute to qE, in particular LHC Stress-Related 1 (LHCSR1) and Photosystem II Subunit S (PSBS). The capacity for qE is strongly induced by UV-B, although the patterns of qE-related proteins accumulating in response to UV-B or to high light are clearly different. The competence for qE induced by acclimation to UV-B markedly contributes to photoprotection upon subsequent exposure to high light. Our study reveals an anterograde link between photoreceptor-mediated signaling in the nucleocytosolic compartment and the photoprotective regulation of photosynthetic activity in the chloroplast.

Psb27, a photosystem II assembly protein, enables quenching of excess light energy during its participation in the PSII lifecycle

2022 ◽  
Author(s):  
Virginia M. Johnson ◽  
Sandeep Biswas ◽  
Johnna L. Roose ◽  
Himadri B. Pakrasi ◽  
Haijun Liu
Keyword(s):  
Photosystem Ii ◽  
Light Energy ◽  
Excess Light
Sign in / Sign up

Export Citation Format

Share Document