Chlorophyll a Fluorescence and Photosynthetic Activity as Tools for the Evaluation of Simazine Toxicity to Protosiphon botryoides and Anabaena variabilis

2001 ◽  
Vol 49 (2) ◽  
pp. 101-105 ◽  
Author(s):  
I.A. Kobbia ◽  
M.G. Battah ◽  
E.F. Shabana ◽  
H.M. Eladel
Keyword(s):  
Chlorophyll A ◽  
Chlorophyll A Fluorescence ◽  
Photosynthetic Activity ◽  
Anabaena Variabilis

scholarly journals Special issue in honour of Prof. Reto J. Strasser - Photosynthetic activity as assessed via chlorophyll a fluorescence suggests a role of potassium channels in root to shoot signaling

2020 ◽  
Vol 58 (SPECIAL ISSUE) ◽  
pp. 608-621
Author(s):  
O.V. VOITSEKHOVSKAJA ◽  
V.I. APOLLONOV ◽  
A.V. MURTUZOVA ◽  
C.K. RABADANOVA ◽  
M.A. CHARNYSH ◽  
...  
Keyword(s):  
Potassium Channels ◽  
Chlorophyll A ◽  
Chlorophyll A Fluorescence ◽  
Photosynthetic Activity ◽  
Special Issue

Evaluation for Photosynthetic Characteristics in upland cotton germplasm based on chlorophyll a fluorescence

2020 ◽  
Author(s):  
ying sun ◽  
Xiaoming Xu ◽  
Wenqing Dong ◽  
Xiongming Du ◽  
Yinhua Jia ◽  
...  
Keyword(s):  
Gossypium Hirsutum ◽  
Chlorophyll A ◽  
Chlorophyll A Fluorescence ◽  
Upland Cotton ◽  
Genetic Improvement ◽  
Photosynthetic Activity ◽  
Photosynthetic Characteristics ◽  
Germplasm Resources ◽  
Fluorescence Parameters

Abstract Background: The research of photosynthetic characteristics of germplasm resources of cotton ( Gossypium hirsutum L.) provides reference for genetic improvement on cotton cultivars. Chlorophyll a fluorescence (CF) is widely used for analysis of photosynthetic activity of plants leaves. However, large number of Chlorophyll a fluorescence parameters (CFPs) and inconsistency CFPs application in different studies confuse researchers, which greatly limit the accuracy of photosynthesis analysis. In this study, all 53 CFPs of 189 upland cotton cultivars (strains) measured by handy PEA were screened at 12:00 and 17:00 separately. Results: 9 CFPs including PI(abs), DIo/CSo, PI(abs, total), Sm/T, Vj, Eto/CSo, REo/CSo, RC/CSo and N at 12:00 and 8 CFPs including PI(abs, total), PI(abs), DIo/CSo, Sm/T, REo/CSo, N, Vj and Eto/CSo at 17:00 are suitable for screening of upland cotton cultivars (strains). The screened CFPs classify and evaluate the photosynthetic characteristics of upland cotton cultivars (strains). Conclusions: CFPs selected can be effect and consistent parameters to evaluate photosynthetic activity of cotton germplasm.

scholarly journals Alterations in Chlorophyll a Fluorescence and Pigments Concentration in the Leaves of Cauliflower and Broccoli Transplants Subjected to Chilling

2016 ◽  
Vol 44 (1) ◽  
pp. 17-24 ◽  
Author(s):  
Renata WOJCIECHOWSKA ◽  
Andrzej KALISZ ◽  
Agnieszka SĘKARA ◽  
Michał NOSEK ◽  
Stanisław CEBULA ◽  
...  
Keyword(s):  
Brassica Oleracea ◽  
Chlorophyll A ◽  
Chlorophyll A Fluorescence ◽  
Photosynthetic Activity ◽  
Substantial Reduction ◽  
Photosynthetic Apparatus ◽  
Experiment Data ◽  
Fluorescence Parameters ◽  
Chilling Temperatures ◽  
Brassica Oleracea L

Chlorophyll a fluorescence parameters and photosynthetic pigments content in leaves of broccoli (Brassica oleracea L. var.italica) cv. ‘Monaco’ F1 and cauliflower (Brassica oleracea L. var. botrytis) cv. ‘Bruce’ F1 transplants were analyzed to investigatethe effects of chilling temperatures (6 and 10 °C) and the exposure length (1 or 2 weeks) on the photosynthetic apparatuscondition in 3-year experiment. Data were compared to control plants exposed to 14 °C for 1 and 2 weeks. The lowest valuesof maximum quantum efficiency of photosystem II (Fv/Fm) and the performance index (PI) were observed in cauliflowerchilled at 6 °C for 2 weeks. This was not accompanied by any substantial reduction in chlorophylls concentration, however,significant correlations between Fv/Fm or PI and chlorophylls content in cauliflower leaves were found. There was no negativeeffects of chilling on photosynthetic activity and chlorophyll content in broccoli leaves, the amount of carotenoids significantlyincreased in the broccoli chilled for 2 weeks in 6 °C. The chlorophyll a fluorescence indices and accelerated carotenoidssynthesis showed that broccoli had less vulnerable photosynthetic apparatus to stress-induced temperatures and more efficientprotection mechanisms in comparison to cauliflower transplants.

scholarly journals Remote sensing of sun-induced chlorophyll-a fluorescence in inland and coastal waters: Current state and future prospects

2021 ◽  
Vol 262 ◽  
pp. 112482
Author(s):  
Remika S. Gupana ◽  
Daniel Odermatt ◽  
Ilaria Cesana ◽  
Claudia Giardino ◽  
Ladislav Nedbal ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Chlorophyll A ◽  
Coastal Waters ◽  
Chlorophyll A Fluorescence ◽  
Future Prospects ◽  
Current State
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