Spirodela
Mostrando 13-24 de 38 artigos, teses e dissertações.
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13. Turnover of Phospholipids in Normal and Phosphorus-deficient Spirodela
When 32P1 was supplied as a 15-minute pulse to normal Spirodela oligorrhiza plants, the first phospholipid to become fully labeled was phosphatidic acid. Phosphatidyl glycerol reached maximum labeling before the other major phospholipids. In phosphorus-deficient plants, however, phosphatidyl glycerol became labeled much more slowly than either phosphatidyl c
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14. The nucleotide sequences of the genes coding for tRNAArgUCU, tRNAArgACG and tRNAAsnGUU on Spirodela oligorhiza chloroplast DNA.
The nucleotide sequences of the genes coding for tRNAArgUCU, tRNAArgACG and tRNAAsnGUU on chloroplast DNA of Spirodela oligorhiza have been determined. All three genes are expressed. 5' Proximal to these genes sequences are found homologous to prokaryotic promoter sequences, which might be involved as transcriptional start motifs.
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15. The nucleotide sequence of the 4.5S and 5S rRNA genes and flanking regions from Spirodela oligorhiza chloroplasts.
The base sequence of Spirodela oligorhiza chloroplast DNA coding for 4.5S and 5S ribosomal RNA, the flanking regions and the spacer between these two genes has been determined. We have compared these sequences with the corresponding ones in other higher plants. Besides a high degree of homology, some interesting differences are found.
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16. GAS INJURY TO PURE CULTURES OF SPIRODELA
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17. Turion Induction in Spirodela polyrrhiza by Abscisic Acid
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18. Production of Auxotrophs in a Duckweed, Spirodela Polyrhiza 12
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19. Characterization of the 32,000 Dalton Chloroplast Membrane Protein: III. Probing Its Biological Function in Spirodela1
The rapidly turning over, photoinduced thylakoid protein, P-32000, is the main pulse-labeled membrane polypeptide in the chloroplasts of Spirodela oligorrhiza, yet little is known of its physiological function. Two hypotheses are tested: that P-32000 synthesis is necessary for thylakoid biogenesis; that it directly participates in photosynthesis. Spirodela c
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20. EFFECT OF VARIOUS FACTORS ON THE UTILIZATION OF NITROGEN AND IRON BY SPIRODELA POLYRHIZA (L.) SCHLEID. 1
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21. The gene c-ino1 from Citrus paradisi is highly homologous to tur1 and ino1 from yeast and Spirodela encoding for myo-inositol phosphate synthase.
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22. The nucleotide sequences of the regions flanking the genes coding for 23S, 16S and 4.5S ribosomal RNA on chloroplast DNA from Spirodela oligorhiza.
The nucleotide sequences of the flanking regions of the genes coding for Spirodela oligorhiza chloroplast ribosomal RNA's have been determined. We have compared these sequences to the corresponding ones in chloroplast DNA of other plants and of E. coli and find a striking sequential or structural homology. The region 5'-proximal to the gene coding for 16S rR
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23. The abscisic acid induction of a novel peroxidase is antagonized by cytokinin in Spirodela polyrrhiza L.
The growth regulator abscisic acid (ABA) can be used to induce dormant bud structures (turions) in the duckweed Spirodela polyrrhiza L. In this paper we show that during this process, ABA rapidly induces elevated levels of mRNA transcripts encoding a novel basic peroxidase. In addition, we show that in the presence of the cytokinin kinetin the maintained inc
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24. The rapidly metabolized 32,000-dalton polypeptide of the chloroplast is the "proteinaceous shield" regulating photosystem II electron transport and mediating diuron herbicide sensitivity.
Mild trypsin treatment of Spirodela oligorrhiza thylakoid membranes leads to partial digestion of the rapidly metabolized, surface-exposed, 32,000-dalton protein. Under these conditions, photoreduction of ferricyanide becomes insensitive to diuron [3-(3,4-dichlorophenyl)-1,1-dimethylurea], an inhibitor of photosystem II electron transport. Preincubation of t