1984
DOI: 10.1104/pp.74.4.993
|View full text |Cite
|
Sign up to set email alerts
|

Photosystem Electron-Transport Capacity and Light-Harvesting Antenna Size in Maize Chloroplasts

Abstract: Spectrophotometric and kinetic measurements were applied to yield photosystem (PS) stoichiometries and the functional antenna size of PSI, PSII,,, and PSIIO in Zea mays chloroplasts in situ. Concentrations of PSII and PSI reaction centers were determined from the amplitude of the light-induced absorbance change at 320 and 700 nm, which reflect the photoreduction of the primary electron acceptor Q of PSII and the photooxidation of the reaction center P700 of PSI, respectively. Determination of the functional ch… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1
1

Citation Types

2
10
0

Year Published

1985
1985
2009
2009

Publication Types

Select...
5
4

Relationship

1
8

Authors

Journals

citations
Cited by 38 publications
(12 citation statements)
references
References 27 publications
2
10
0
Order By: Relevance
“…The PSI antenna size (calculated from spectroscopic measurements) was also lower than other reported values, i.e. 144 molecules of Chl per PSI reaction center in the sugar beet hybrid compared to 195 in maize (11) and 209 to 222 in spinach and pea (17,18). PSII antenna sizes were comparable to those reported previously ( 17,18 (10,15,24).…”
Section: Discussionsupporting
confidence: 47%
See 1 more Smart Citation
“…The PSI antenna size (calculated from spectroscopic measurements) was also lower than other reported values, i.e. 144 molecules of Chl per PSI reaction center in the sugar beet hybrid compared to 195 in maize (11) and 209 to 222 in spinach and pea (17,18). PSII antenna sizes were comparable to those reported previously ( 17,18 (10,15,24).…”
Section: Discussionsupporting
confidence: 47%
“…The rate of light absorption by PSI was determined under the same excitation conditions from the kinetic analysis of the absorbance change at 700 nm of KCN-treated (plastocyanin inhibited) chloroplasts in the presence of methylviologen (11,18). For plastocyanin inhibition, a procedure modified from Izawa et al (13) Figure 1.…”
mentioning
confidence: 99%
“…One possible explanation for the additional effect upon the oxyfluorfen dependent production of 102 could be linked to the overall redox state of the photosynthetic membrane in the presence or absence of an electron acceptor. In the absence of an electron acceptor the thylakoid membrane will develop a higher redox (more negative) potential than when the acceptor is present, due to a build up of electrons in the plastoquinone pool (10). Thus experiments using oxyfluorfen alone utilize a membrane system with more reducing power than a system in which paraquat is included.…”
Section: Methodsmentioning
confidence: 99%
“…The P700 oxidation traces were fitted with first-order kinetics, and the rate of oxidation was determined. Under these experimental conditions, the rate of P700 oxidation is proportional with the antenna size (Ghirardi and Melis, 1984). For fluorescence induction, the data obtained during the 20-ms induction curves (2000 points) were numerically fitted by the function F(t, I, sPSII, J) based on a sigmoidal fluorescence induction model (Koblizek et al, 2001), where J is the PSII connectivity parameter that determines the shape of the induction curve.…”
Section: Estimation Of the Functional Antenna Sizes Of Psii And Psimentioning
confidence: 99%