Abstract：
:Species in the Laxa and Grandia groups of the genus Panicum are adapted to low, wet areas of tropical and subtropical America. Panicum milioides is a species with C3 photosynthesis and low apparent photorespiration and has been classified as a C3/C4 intermediate. Other species in the Laxa group are C3 with normal photorespiration. Panicum prionitis is a C4 species in the Grandia group. Since P. milioides has some leaf characteristics intermediate to C3 and C4 species, its photosynthetic response to irradiance and temperature was compared to the closely related C3 species, P. laxum and P. boliviense and to P. prionitis. The response of apparent photosynthesis to irradiance and temperature was similar to that of P. laxum and P. boliviense, with saturation at a photosynthetic photo flux density of about 1 mmol m(-2) s(-1) at 30°C and temperature optimum near 30°C. In contrast, P. prionitis showed no light saturation up to 2 mmol m(-2) s(-1) and an optimum temperature near 40°C. P. milioides exhibited low CO2 loss into CO2-free air in the light and this loss was nearly insensitive to temperature. Loss of CO2 in the light in the C3 species, P. laxum and P. boliviense, was several-fold higher than in P. milioides and increased 2- to 5-fold with increases in temperature from 10 to 40°C. The level of dark respiration and its response to temperature were similar in all four Panicum species examined. It is concluded that the low apparent photorespiration in P. milioides does not influence its response of apparent photosynthesis to irradiance and temperature in comparison to closely related C3 Panicum species.
journal_name
Photosynth Resjournal_title
Photosynthesis researchauthors
Henning JC,Brown RHdoi
10.1007/BF00024189subject
Has Abstractpub_date
1986-01-01 00:00:00pages
101-12issue
1-2eissn
0166-8595issn
1573-5079journal_volume
10pub_type
杂志文章abstract：:Fluorescence and electron paramagnetic resonance measurements were used to study selenium influence on photosystem activity in rape seedlings affected by Cd stress. Water cultures containing Hoagland nutrients were supplemented with 400 microM of CdCl(2), 2 microM of Na(2)SeO(4) and a mixture of both CdCl(2) and Na(2)...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-010-9551-y
更新日期：2010-07-01 00:00:00
abstract：:Photosynthesis powers our planet and is a source of inspiration for developing artificial constructs mimicking many aspects of the natural energy transducing process. In the complex machinery of photosystem II (PSII), the redox activity of the tyrosine Z (Tyrz) hydrogen-bonded to histidine 190 (His190) is essential fo...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-020-00815-x
更新日期：2021-01-11 00:00:00
abstract：:The light response curves of the acceptor and donor side mechanisms of photoinhibition of Photosystem II were calculated, using Arabidopsis as a model organism. Acceptor-side photoinhibition was modelled as double reduction of QA, noting that non-photochemical quenching has the same effect on the quantum yield of QA d...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-004-7174-x
更新日期：2005-06-01 00:00:00
abstract：:The dependence of chlorosome development on bacteriochlorophyll (BChl)c synthesis was studied with the phototrophic green bacteriumChloroflexus aurantiacus. By selecting defined culture conditions, three possibilities could be identified. Upon addition of 5-aminolevulinic acid, cells of resting cultures increased thei...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF02184154
更新日期：1994-07-01 00:00:00
abstract：:Most chloroplasts undergo changes in composition, function and structure in response to growth irradiance. However, Tradescantia albiflora, a facultative shade plant, is unable to modulate its light-harvesting components and has the same Chl a/Chl b ratios and number of functional PS II and PS I reaction centres on a ...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/A:1010681721929
更新日期：2001-01-01 00:00:00
abstract：:Nonlinear optical responses of bacteriochlorophyll a (BChl a) were investigated by means of the three-pulse four-wave mixing (FWM) technique under the resonant excitation into the Q ( y ) band. The experimental results are explained by a theoretical model calculation including the Brownian oscillation mode of the solv...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-007-9266-x
更新日期：2008-02-01 00:00:00
abstract：:In higher plants, photosystem II (PSII) is a multi-subunit pigment-protein complex embedded in the thylakoid membranes of chloroplasts, where it is present mostly in dimeric form within the grana. Its light-harvesting antenna system, LHCII, is composed of trimeric and monomeric complexes, which can associate in variab...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-016-0216-3
更新日期：2016-12-01 00:00:00
abstract：:The effect of leaf water potential (Ψ) on net CO2 assimilation rate (A), stomatal conductance (g), transpiration (E) and water-use efficiency (WUE) was measured for three cultivars of cacao (Theobroma cacao L.) seedlings during three recurrent drought cycles. Net assimilation varied greatly at high water potentials, b...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00037179
更新日期：1989-09-01 00:00:00
abstract：:Photoinhibition of Photosystem II (PSII) in lincomycin-treated leaves begins as a first-order reaction, but fluorescence measurements have suggested that after prolonged illumination, the number of active PSII centres stabilizes to 15-20% of control. The stabilization has been interpreted to indicate that photoinhibit...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-009-9496-1
更新日期：2010-01-01 00:00:00
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journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00033035
更新日期：1993-06-01 00:00:00
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journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/A:1024946222187
更新日期：2003-01-01 00:00:00
abstract：:The engagement of different photoprotective mechanisms in the cells of the carotenogenic astaxanthin-accumulating chlorophyte Haematococcus pluvialis (i) under favorable conditions, (ii) in the course of stress-induced haematocyst formation and (iii) during recovery from the stress was studied. To this end, we followe...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-016-0246-x
更新日期：2016-06-01 00:00:00
abstract：:The xanthophyll cycle represents one of the important photoprotection mechanisms in plant cells. In the present review, we summarize current knowledge about the violaxanthin cycle of vascular plants, green and brown algae, and the diadinoxanthin cycle of the algal classes Bacillariophyceae, Xanthophyceae, Haptophyceae...
journal_title：Photosynthesis research
pub_type： 杂志文章,评审
doi：10.1007/s11120-010-9536-x
更新日期：2010-11-01 00:00:00
abstract：:Two portable instruments, designed to evaluate epidermal UV screening in leaves, were compared: the Dualex and the UV-A-PAM fluorimeter. Both instruments excite chlorophyll fluorescence at the same UV wavelengths but reference excitation is in the red and the blue spectral range in the former and the latter fluorimete...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-007-9135-7
更新日期：2007-07-01 00:00:00
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 w...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00032264
更新日期：1987-01-01 00:00:00
abstract：:The major light-harvesting system in cyanobacteria, the phycobilisome, is an essential component of the photosynthetic apparatus that regulates the utilization of the natural light source-the Sun. Earlier works revealed that the thylakoid membrane composition and its physical properties might have an important role in...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-020-00776-1
更新日期：2020-08-01 00:00:00
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journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00018272
更新日期：1987-01-01 00:00:00
abstract：:We present the wavelength dependence of homogeneous holewidths of persistent spectral holes burnt in O2-evolving Photosystem II core complexes isolated from spinach, in the temperature range 2.5-8 K. The data supports the assignment that those chlorophylls which undergo persistent spectral hole-burning are specific CP...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-004-7927-6
更新日期：2005-06-01 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
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journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00051735
更新日期：1990-07-01 00:00:00
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journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/A:1014915900644
更新日期：2002-01-01 00:00:00
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journal_title：Photosynthesis research
pub_type： 传,历史文章,杂志文章
doi：10.1007/s11120-018-0478-z
更新日期：2018-07-01 00:00:00
abstract：:Chlorophyll (Chl) is an essential component of the photosynthetic apparatus. Embedded into Chl-binding proteins, Chl molecules play a central role in light harvesting and charge separation within the photosystems. It is critical for the photosynthetic cell to not only ensure the synthesis of a sufficient amount of new...
journal_title：Photosynthesis research
pub_type： 杂志文章,评审
doi：10.1007/s11120-013-9797-2
更新日期：2014-02-01 00:00:00
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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
abstract：:In this paper we compared the pigment composition, photochemical activity, chloroplast ultrastructure, thylakoid membrane polypeptide composition and ribosomal content of wild-type and seven light-sensitive mutants of Chlamydomonas reinhardii.All the mutants had low chlorophyll and carotenoid content compared to wild-...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00032261
更新日期：1982-01-01 00:00:00
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journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00032639
更新日期：1990-04-01 00:00:00
abstract：:NADP:ferredoxin oxidoreductase (EC. 1.6.7.1.) isolated from a thermophilic blue-green alga, Synechococcus sp., was stable at temperatures up to 65°C. The diaphorase and cytochrome c reductase activities of the enzyme were low at 25°C but increased with elevated temperature to reach a maximum at about 60°C. The pH-prof...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00020595
更新日期：1980-09-01 00:00:00
abstract：:The previous work in our lab showed that the spinach chloroplast ATP synthase epsilon mutant with 3 amino acid residues deleted from the N-terminus had much lower ability to inhibit ATP hydrolysis and block proton leakage in comparison to a mutant with 1 or 2 residues deleted from the N-terminus. The present study aim...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-004-6554-6
更新日期：2005-01-01 00:00:00
abstract：:A hypothesis is proposed to explain the function of Cl(-) in activating the oxygenevolving complex (OEC) of photosystem II (PS II), based on the results of recent (35)Cl-NMR studies. The putative mechanism involves Cl(-) binding to two types of sites. An intrinsic site is suggested to be composed of three histidyl res...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00029400
更新日期：1987-09-01 00:00:00
abstract：:We investigated several photosynthetic parameters of a virescent mutant of durum wheat and of its wild-type. Electron transport rate to ferricyanide was the same in the two genotypes when expressed on leaf area basis while O2 evolution of the leaf tissue in saturating light and CO2 was slightly higher in the yellow ge...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00033365
更新日期：1989-08-01 00:00:00
