scholarly journals Use of in vivo chlorophyll a fluorescence to quantify short-term variations in the productive biomass of intertidal microphytobenthos

2001 ◽  
Vol 218 ◽  
pp. 45-61 ◽  
Author(s):  
J Serôdio ◽  
J Marques da Silva ◽  
F Catarino
Keyword(s):  
Chlorophyll A ◽  
Chlorophyll A Fluorescence ◽  
Short Term

scholarly journals SENSITIVITY TO ENVIRONMENTAL STRESS OF PRATA,JAPIRA AND VITÓRIA BANANA CULTIVARS PROVEN BY CHLOROPHYLL a FLUORESCENCE

2017 ◽  
Vol 39 (2) ◽  
Author(s):  
PRISCILA NOBRES DOS SANTOS ◽  
DIOLINA MOURA SILVA ◽  
CAMILLA ZANOTTI GALLON ◽  
JOSÉ AIRES VENTURA
Keyword(s):  
Environmental Stress ◽  
Chlorophyll A ◽  
Chlorophyll A Fluorescence ◽  
Physiological Responses ◽  
Fluorescence Emission ◽  
Conservation Of Energy ◽  
Post Harvest ◽  
Mda Content ◽  
Two Stages

ABSTRACT This study aimed to evaluate the physiological responses to environmental stress during pre- and post-harvest of the following banana cultivars: Prata (AAB), Japira (AAAB) and Vitoria (AAAB). Analyses were carried out on young plants at vegetative stage (daughter-plant) and adult plants at reproductive stage (motherplant). The experimental design was completely randomized. In the in vivo pre-harvest analysis were used seven replications, in a factorial scheme (3x2x2), three cultivars and two stages (vegetative and reproductive) and two collection periods (March and June). For the analysis of post-harvest quality were used five replications in a factorial design (3x2x5), corresponding to three cultivars, two development stages and five periods of post-harvest analysis, carried out every two days from stage 4 of fruit ripening. The chlorophyll a fluorescence emission kinetics showed low photochemical performance of the three cultivars in June, a period characterized by lower temperatures and water deficit. Prata was the cultivar with the lowest tolerance to abiotic physiological behavior changes, which also reflected in fruit quality, because there was a change in physical and physicochemical parameters. Japira and Vitoria cultivars showed similar physiological responses in the pre- and post-harvest periods, according to their phylogenetic proximity. The total performance index, i.e., the conservation of energy absorbed by PSII up to the reduction of the final PSI acceptors (PItotal) and the di-malonic aldehyde (MDA) content were significantly higher in Japira and Vitoria cultivars compared to Prata cultivar in the reproductive phase. There was no significant change in the potential quantum efficiency of PSII (FV / FM = jP0) among the three cultivars. It was concluded that Japira and Vitoria cultivars showed greater plasticity to tolerate or even adapt to abiotic variations keeping higher fruit yield. PItotal is the most sensitive parameter during the banana life cycle and important tool for distinguishing different cultivars yields.

scholarly journals In Vivo Assessment of Cold Tolerance through Chlorophyll-a Fluorescence in Transgenic Zoysiagrass Expressing Mutant Phytochrome A

PLoS ONE ◽  
2015 ◽  
Vol 10 (5) ◽  
pp. e0127200 ◽  
Author(s):  
Mayank Anand Gururani ◽  
Jelli Venkatesh ◽  
Markkandan Ganesan ◽  
Reto Jörg Strasser ◽  
Yunjeong Han ◽  
...  
Keyword(s):  
Cold Tolerance ◽  
Chlorophyll A ◽  
Chlorophyll A Fluorescence ◽  
Phytochrome A ◽  
In Vivo Assessment

Chlorella fusca (Chlorophyta) grown in thin-layer cascades: Estimation of biomass productivity by in-vivo chlorophyll a fluorescence monitoring

2016 ◽  
Vol 17 ◽  
pp. 21-30 ◽  
Author(s):  
Celia G. Jerez ◽  
José R. Malapascua ◽  
Magda Sergejevová ◽  
Jiří Masojídek ◽  
Félix L. Figueroa
Keyword(s):  
Thin Layer ◽  
Chlorophyll A ◽  
Chlorophyll A Fluorescence ◽  
Biomass Productivity ◽  
Chlorella Fusca

In vivo Chlorophyll a Fluorescence in Sodium-Deficient C4 Plants

1986 ◽  
Vol 13 (5) ◽  
pp. 589
Author(s):  
CPL Grof ◽  
M Johnston ◽  
PF Bronwell
Keyword(s):  
Chlorophyll A ◽  
Chlorophyll A Fluorescence ◽  
Growth Response ◽  
Leaf Tissue ◽  
C4 Plants ◽  
Culture Solution ◽  
Fluorescence Ratio ◽  
Group I ◽  
Parallel Increase

The fluorescence ratio (Fp-FI)/FI gave a consistent value when leaf tissue weights greater than 0.1 g were used and was lower in sodium-deficient than normal C4 plants. Of the group I elements only sodium, irrespective of the salt supplied to deficient cultures, increased the fluorescence ratio to that observed in normal plants. The concentration of sodium required to increase the fluorescence ratio corresponded to the concentration of sodium required to bring about a growth response in Kochia childsii. The application of sodium, either directly onto the leaves or via the culture solution, brought about a rapid and parallel increase in the chlorophyll a/b ratio and the fluorescence ratio in K. childsii.

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