scholarly journals Analyzing the Light Energy Distribution in the Photosynthetic Apparatus of C4 Plants Using Highly Purified Mesophyll and Bundle-Sheath Thylakoids

1996 ◽  
Vol 112 (3) ◽  
pp. 1055-1070 ◽  
Author(s):  
E. Pfundel ◽  
E. Nagel ◽  
A. Meister
Keyword(s):  
Energy Distribution ◽  
Photosynthetic Apparatus ◽  
Bundle Sheath ◽  
Light Energy ◽  
C4 Plants

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.

scholarly journals Reactive oxygen species and redox regulation in mesophyll and bundle sheath cells of C4 plants

2018 ◽  
Vol 69 (14) ◽  
pp. 3321-3331 ◽  
Author(s):  
Ismail Turkan ◽  
Baris Uzilday ◽  
Karl-Josef Dietz ◽  
Andrea Bräutigam ◽  
Rengin Ozgur
Keyword(s):  
Reactive Oxygen Species ◽  
Redox Regulation ◽  
Reactive Oxygen ◽  
Bundle Sheath ◽  
C4 Plants ◽  
Oxygen Species ◽  
Bundle Sheath Cells ◽  
Sheath Cells

Characterisation of Leaf Fluorescence of Sodium-Deficient C4 Plants: Kinetics of Emissions From Whole Leaves and Fluorescence Properties of Isolated Thylakoids

1989 ◽  
Vol 16 (6) ◽  
pp. 459 ◽  
Author(s):  
CPL Grof ◽  
DBC Richards ◽  
M Johnston ◽  
PF Brownell
Keyword(s):  
Light Harvesting ◽  
Polynomial Function ◽  
Bundle Sheath ◽  
C4 Plants ◽  
Degree Polynomial ◽  
Amaranthus Tricolor ◽  
Fluorescence Kinetics ◽  
C4 Species ◽  
Chloris Gayana ◽  
Kinetics Of

Examination of whole-leaf fluorescence kinetics by means of a second-degree polynomial function showed a decrease in the rate of the rise from Fd to Fp in sodium-deficient compared with normal leaves of the C4 species Kochia childsii and Amaranthus tricolor. This suggests a decreased efficiency in light harvesting and/or utilisation in sodium-deficient plants. Fluorescence ratios (Fv/Fo) of separated mesophyll and bundle sheath thylakoids were both lower from leaves of sodium-deficient compared with normal plants of K. childsii, Chloris gayana, A. edulis and A. tricolor.

Possibilities of using inhomogeneity in light energy distribution for estimating the degree of coherence of superposing waves

2012 ◽  
Vol 51 (10) ◽  
pp. C38 ◽  
Author(s):  
Claudia Yu. Zenkova ◽  
Mykhailo P. Gorsky ◽  
Iryna V. Soltys ◽  
Pavlo O. Angelsky
Keyword(s):  
Energy Distribution ◽  
Light Energy ◽  
Degree Of Coherence

Photochemical Characteristics of Mesophyll and Bundle Sheath Chloroplasts from C4 Plants

1978 ◽  
Vol 43 (2) ◽  
pp. 107-113 ◽  
Author(s):  
AGEPATI S. RAGHAVENDRA ◽  
V. S. R. DAS
Keyword(s):  
Bundle Sheath ◽  
C4 Plants
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