Results 1 to 10 of about 100,582 (216)
HCAR Is a Limitation Factor for Chlorophyll Cycle and Chlorophyll b Degradation in Chlorophyll-b-Overproducing Plants. [PDF]
Biomolecules, 2020 The chlorophyll (Chl) cycle is the metabolic pathway for Chl a and Chl b inter-conversion. In this pathway, Chl b is synthesized from Chl a by the catalyzing action of chlorophyllide a oxygenase (CAO). In contrast, Chl b is firstly reduced to produce 7-hydroxymethyl Chl (HMChl) a, which is catalyzed by two isozymes of Chl b reductase (CBR), non-yellow ...
Zhao X, Jia T, Hu X.
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Conversion of Chlorophyll b to Chlorophyll a via 7-Hydroxymethyl Chlorophyll [PDF]
Journal of Biological Chemistry, 1996 Chlorophyll b is synthesized from chlorophyll a by the oxidation of the methyl group on the ring B of the tetrapyrrole ring to the formyl group. Previously, we reported that chlorophyllide b could be converted to chlorophyll a in isolated cucumber etioplasts indicating the conversion of chlorophyll b to chlorophyll a.
H, Ito, T, Ohtsuka, A, Tanaka
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Conversion of Chlorophyll b to Chlorophyll a and the Assembly of Chlorophyll with Apoproteins by Isolated Chloroplasts [PDF]
Plant Physiology, 1997 Abstract The photosynthetic apparatus is reorganized during acclimation to various light environments. During adaptation of plants grown under a low-light to high-light environment, the light-harvesting chlorophyll a/b-protein complexes decompose concomitantly with an increase in the core complex of photosystem II.
T., Ohtsuka, H., Ito, A., Tanaka
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Chlorophyll b degradation by chlorophyll b reductase under high-light conditions [PDF]
Photosynthesis Research, 2015 The light-harvesting chlorophyll a/b binding protein complex of photosystem II (LHCII) is the main antenna complex of photosystem II (PSII). Plants change their LHCII content depending on the light environment. Under high-light conditions, the content of LHCII should decrease because over-excitation damages the photosystem.
Sato, Rei, Ito, Hisashi, Tanaka, Ayumi
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Chlorophyll b to Chlorophyll a Conversion Precedes Chlorophyll Degradation in Hordeum vulgare L. [PDF]
Journal of Biological Chemistry, 1999 This study reveals by in vivo deuterium labeling that in higher plants chlorophyll (Chl) b is converted to Chl a before degradation. For this purpose, de-greening of excised green primary leaves of barley (Hordeum vulgare) was induced by permanent darkness in the presence of heavy water (80 atom % (2)H).
Folly P, Engel N
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The role of chlorophyll b in photosynthesis: Hypothesis [PDF]
BMC Plant Biology, 2001 The physico-chemical properties of chlorophylls b and c have been known for decades. Yet the mechanisms by which these secondary chlorophylls support assembly and accumulation of light-harvesting complexes in vivo have not been resolved.Biosynthetic modifications that introduce electronegative groups on the periphery of the chlorophyll molecule ...
Park, Hyoungshin +2 more
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Zeitschrift für Naturforschung B, 1969 A electric field induced linear and quadratic change in the optical absorption of a chlorophyll a and chlorophyll b monolayer is reported. The chlorophylls are incorporated in a fatty acid monolayer condenser which allows the application of external field strength up to 4 · 106 V/cm. The spectrum of the quadratic electrochromic effect shows evidence of
D. Kleuser, H. Bücher
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Chlorophyll a + b Content and Chlorophyll Fluorescence in Avocado
Journal of Agricultural Science, 2012 Tonnage (T), Simmonds (S) avocado trees, and TxS crosses were evaluated for differences in chlorophyll content and maximal quantum yield of photosystem II in sun and shade-type leaves. Total chlorophyll content by area (Chl a+bar) ranged from 984 mg m -2 in TxS240 to 4320 mg m -2 in Simmonds.
Stewart Reed +3 more
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REACTIVITY OF CHLOROPHYLL a/b‐PROTEINS AND MICELLAR TRITON X‐100 COMPLEXES OF CHLOROPHYLLS a OR b WITH BOROHYDRIDE [PDF]
Photochemistry and Photobiology, 1989 Abstract—The reaction of several plant chlorophyll‐protein complexes with NaBH4has been studied by absorption spectroscopy. In all the complexes studied, chlorophyllbis more reactive than Chia,due to preferential reaction of its formyl substituent at C‐7. The complexes also show large variations in reactivity towards NaBH4and the order of reactivity is:
Scheer, Hugo +2 more
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Migration of Electronic Energy from Chlorophyll b to Chlorophyll a in Solutions
Biophysical Journal, 1972 Absorption, emission, and fluorescence excitation spectra of pure solutions of chlorophyll a (Chl a) and chlorophyll b (Chl b) in diethyl ether and of equimolecular mixed solutions of the two pigments, were determined at room temperature as functions of concentration (in the range from 5 x 10(-6) M to 4 x 10(-3) M) and of wavelength of the exciting ...
Bauer, R.K., Szalay, L., Tombacz, E.
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