Abstract:
:A comparative study of photosystem II complexes isolated from tobacco (Nicotiana tabacum L. cv. John William's Broadleaf) which contains normal stacked thylakoid membranes, and from two chlorophyll deficient tobacco mutants (Su/su and Su/su var. Aurea) which have low stacked grana or essentially unstacked thylakoids with occasional membrane doublings, has been carried out. The corresponding photosystem II complexes had an O2 evolving activity ranging from 290 (for the wild type) to 1100 μmol O2 x mg chlorophyll(-1) x h(-1) (for the mutant Su/su var. Aurea). The reduced photosynthetic unit size was also obvious in the mangenese and cytochromeb559 content. The photosystem II complex from the wild type contained 4 Mn and 1 cytochromeb559 per 200 to 280 chlorophylls, while the corresponding value for the mutant Su/su var. Aurea was 4 Mn and 1 cytochromeb559 per 35 to 60 chlorophylls. We have also examined the polypeptide composition and show that the photosystem II complex from the wild type consisted of polypeptides of 48, 42, 33, 32, 30, 28, 23, 21, 18, 16 and 10 kDa, while the mutant complex mainly contained the polypeptides of 48, 42, 33, 32, 30, 28 and 10 kDa. In the mutant photosystem II complex the light-harvesting chlorophyll protein (peptide of 28 kDa) was reduced by a factor of 5 to 6 as compared to the wild type. With respect to the peptide composition and the photosynthetic unit size, the Triton-solubilized photosystem II complex from the mutant Su/su var. Aurea was very similar to O2 evolving photosystem II reaction center core complexes.
journal_name
Photosynth Resjournal_title
Photosynthesis researchauthors
Specht S,Pistorius EK,Schmid GHdoi
10.1007/BF00032264subject
Has Abstractpub_date
1987-01-01 00:00:00pages
47-56issue
1eissn
0166-8595issn
1573-5079journal_volume
13pub_type
杂志文章abstract::Alternative electron sinks are an important regulatory mechanism to dissipate excessively absorbed light energy particularly under fast changing dynamic light conditions. In diatoms, the cyclic electron transport (CET) around Photosystem II (PS II) is an alternative electron transport pathway (AET) that contributes to...
journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1007/s11120-015-0209-7
更新日期:2016-05-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章,评审
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更新日期:2013-11-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
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更新日期:1984-09-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1023/A:1006367719639
更新日期:2000-01-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1023/A:1006455230379
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journal_title:Photosynthesis research
pub_type: 杂志文章
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更新日期:1982-12-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1007/s11120-013-9878-2
更新日期:2013-09-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1007/s11120-011-9622-8
更新日期:2011-09-01 00:00:00
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pub_type: 杂志文章
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更新日期:2008-10-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
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更新日期:2005-11-01 00:00:00
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pub_type: 杂志文章
doi:10.1007/s11120-019-00697-8
更新日期:2020-02-01 00:00:00
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pub_type: 杂志文章
doi:10.1007/BF00028750
更新日期:1981-06-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1007/BF00033120
更新日期:1996-12-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1007/BF00035379
更新日期:1991-08-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1023/B:PRES.0000028397.86495.b5
更新日期:2004-01-01 00:00:00
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更新日期:2004-01-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1007/BF00035259
更新日期:1988-02-01 00:00:00
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pub_type: 杂志文章
doi:10.1007/s11120-020-00725-y
更新日期:2020-04-01 00:00:00
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更新日期:2007-07-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
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journal_title:Photosynthesis research
pub_type: 杂志文章
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更新日期:2004-01-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1023/A:1020475502933
更新日期:2002-01-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1023/A:1026500911237
更新日期:2000-01-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1007/BF00034783
更新日期:1996-09-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1007/BF00041806
更新日期:1983-01-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1023/B:PRES.0000036881.23512.42
更新日期:2004-01-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章,评审
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更新日期:2007-04-01 00:00:00
abstract::The Soret absorption spectra of six synthetic rigid porphyrin dimers whose crystal structures have been determined are simulated using simple exciton theory. The objective is to test the validity of the point dipole and associated approximations; the electronic interaction parameters are thus calculated using data obt...
journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1007/BF00048299
更新日期:1989-12-01 00:00:00