(n.) Literally, leaf green; a green granular matter formed in the cells of the leaves (and other parts exposed to light) of plants, to which they owe their green color, and through which all ordinary assimilation of plant food takes place. Similar chlorophyll granules have been found in the tissues of the lower animals.
Example Sentences:
(1) Results obtained show that chlorophyll is more active than other inhibitors studied and suggest a higher surface adsorption intensity on the primary sources of the crystal surface.
(2) Upon illumination, a dark-adapted photosynthetic sample shows time-dependent changes in chlorophyll (Chl) a fluorescence yield, known as the Kautsky phenomenon or the OIDPS transient.
(3) As both chlorophyll a and b accumulate, extensive formation of grana takes place.
(4) In dark-grown cells adapting to the light in resting medium and in an X-ray-induced mutant, D(o) is proportional to the chlorophyll content of the cells.
(5) Luminescence yield, absorption spectra and molecular weight dependence of chlorophyll in methylethylketone and n-hexane on concentration was investigated.
(6) The derivative absorption spectra of adsorbed chlorophyll a have been obtained.
(7) An in vitro translation system using lysed etioplasts was developed to test if the accumulation of plastid-encoded chlorophyll a apoproteins is dependent on the de novo synthesis of chlorophyll a.
(8) Measurements of chlorophyll a fluorescence decay kinetics after the second saturating actinic flash indicated that, after formate treatment, the halftime of QA- oxidation was decreased by approximately a factor of 2, 4 and 6 in the wild type, R251S and R233Q, respectively.
(9) Highest activities in darkness have been observed at times when maximum chlorophyll formation would have occurred had the plants been exposed to light.
(10) DBcAMP* showed a positive effect on chlorophyll synthesis and growth rate at much lower concentrations compared to cAMP.
(11) One of them seems to be correlated with chlorophyll derivatives.
(12) In presence of vanadium, the chlorophyll formation was stimulated in Scenedesmus obliquus.
(13) The apparent molecular weight of the chlorophyll-protein complexes I and II are 88,000 and 28,000, respectively.
(14) This change is ascribed to the irreversible oxidation of a dimeric chlorophyll molecule which acts as electron donor to P+-680 under these conditions.
(15) The potential was found to shift to a less noble state when the system of the chlorophyll-naphthoquinone electrode was inserted into NAD solution with illumination.
(16) Analyses included measurement of chlorophyll autofluorescence and fluorescence due to uptake of fluorescein diacetate (FDA) and calcofluor white M2R (CFW).
(17) Chlorophyllase (chlorophyll chlorophyllidohydrolase, EC 3.1.1.14) activity assays that are based on the determination of this chlorophyllide fluorescence show that phosphatidylglycerol (PG), and also sulphoquinovosyldiacylglycerol (SQDG), associate with isolated chlorophyllase, thereby inactivating the enzyme in a co-operative way.
(18) Resonance Raman spectra of the pi-cation of bacterio-chlorophyll a in solution at 30 K are reported and discussed.
(19) This evidences for the significance of the reaction system organization for interaction of chlorophyllase with chlorophyll.
(20) The natural colorant area can be subdivided into anthocyanins, betalains, chlorophylls, carotenoids, flavonoids, polyphenols, Monascus, hemes, quinones, biliproteins, safflower, turmeric, and miscellaneous.
Chlorosis
Definition:
(n.) The green sickness; an anaemic disease of young women, characterized by a greenish or grayish yellow hue of the skin, weakness, palpitation, etc.
(n.) A disease in plants, causing the flowers to turn green or the leaves to lose their normal green color.
Example Sentences:
(1) Tentoxin is a naturally occurring phytotoxic peptide that causes seedling chlorosis and arrests growth in sensitive plants and algae.
(2) Determinants influencing the degree of leaf chlorosis were located in a separate genome domain encompassing part of gene VI together with the large intergenic region and part of gene VII (nts 6103-90).
(3) Induction of chlorosis was prevented or less evident in mutant plants that were inoculated withPseudomonas tabaci, a bacterial pathogen which produces a toxin that is a structural analog of methioning.
(4) (RS)-AHPA and C-c3Ado induced chlorosis in Nicotiana tabacum leaf discs.
(5) coronafaciens were still able to produce necrotic lesions on oat plants (Avena sativa), although without the chlorosis associated with tabtoxin production.
(6) Chlorosis was assessed after 48 hr of continuous illumination to establish herbicidal potency.
(7) Some cucumber mosaic virus satellite RNAs induce chlorosis on any of several host plants, including either tobacco or tomato.
(8) We found that this bleaching process (chlorosis) in cells deprived of sulfur (S) was similar to that in cells deprived of nitrogen (N), but that cells deprived of phosphorus (P) bleached differently.
(9) Infection of tobacco with various pseudorecombinants of subgroup I and II CMV strains, together with WL3- or B2-sat RNA, suggests that chlorosis is associated with RNA 2 of subgroup II CMV strains.
(10) The correlation of chlorosis induction and a substitution for proline with leucine or serine at amino acid 129 suggests that this residue is the determinant of chlorosis induction.
(11) Site-directed mutagenesis showed that a substitution at nucleotide (nt) 40 in the V1 gene affected streak width, while severity of chlorosis, length of streaks, latency, and host range was determined by a single base change at nt 2473 in the large intergenic region.
(12) Both the "existence" of chlorosis and the way it was understood served ideologically to conceal the growing importance of adolescent labor and the recognition of the social genesis of illness.
(13) Plants that grew varied widely from those with no chlorosis to those with more chlorosis than the original variety from which the discs were taken.
(14) As expected, one group of mutant fail to make toxin in planta, resulting in the absence of chlorosis.
(15) The determinants of host range, severity of chlorosis, streak length, and timing of symptom appearance map to a fragment which includes the large intergenic region and the 5' terminus of the complementary sense C1 gene.
(16) Chlorosis-inducing isolates of Xanthomonas albilineans, the sugarcane leaf scald pathogen, produced a mixture of antibacterial compounds in culture.
(17) causes severe variegated chlorosis in germinating seedlings of certain dicotyledonous species.
(18) By contrast, B2-sat RNA induced chlorosis in tobacco, whereas WL1-sat and G-sat RNAs did not.
(19) Three of the satellite RNAs (B2-sat, G-sat, and WL1-sat RNA) ameliorated the symptoms induced by CMV on tomato, whereas three others (B1-sat, B3-sat, and WL2-sat RNA) induced chlorosis on tomato, the extent and nature of which was CMV-strain dependent.
(20) To determine if chlorosis caused by tentoxin, a toxin produced by Alternaria tenuis Nees., is due to interference with chlorophyll synthesis directly or to disruption of normal chloroplast development, the effects of the toxin on these processes in cucumber (Cucumis sativus L.) and cabbage (Brassica oleracea L., var.