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You searched for: Journal name Plant physiology Remove constraint Journal name: Plant physiology Publication year rev 7998-2002 Remove constraint Publication year rev: 7998-2002 Source 2002 v.128 no.2 Remove constraint Source: 2002 v.128 no.2
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1. Antisense RNA-mediated suppression of benzophenanthridine alkaloid biosynthesis in transgenic cell cultures of California poppy

Author:
Park, S.U.; Yu, M.; Facchini, P.J.
Source:
Plant physiology 2002 v.128 no.2 pp. 696-706
ISSN:
0032-0889
Subject:
Eschscholzia californica; antisense RNA; alkaloids; biosynthesis; biochemical pathways; transgenic plants; cultured cells; enzymes; enzyme activity; messenger RNA; chemical constituents of plants
Abstract:
... California poppy (Eschscholzia californica Cham.) cell cultures produce several benzophenanthridine alkaloids, such as sanguinarine, chelirubine, and macarpine, with potent pharmacological activity. Antisense constructs of genes encoding two enzymes involved in benzophenanthridine alkaloid biosynthesis, the berberine bridge enzyme (BBE) and N-methylcoclaurine 3'-hydroxylase (CYP80B1), were introdu ...
DOI:
10.1104/pp.010741
PubMed:
11842172
PubMed Central:
PMC148930

2. AtREM1, a member of a new family of B3 domain-containing genes, is preferentially expressed in reproductive meristems

Author:
Franco-Zorrilla, J.M.; Cubas, P.; Jarillo, J.A.; Fernandez-Calvin, B.; Salinas, J.; Martinez-Zapater, J.M.
Source:
Plant physiology 2002 v.128 no.2 pp. 418-427
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; amino acid sequences; flower primordia; sexual reproduction; nucleotide sequences; multigene family
Abstract:
... We have isolated and characterized AtREM1, the Arabidopsis ortholog of the cauliflower (Brassica oleracea) BoREM1. AtREM1 belongs to a large gene family of more than 20 members in Arabidopsis. The deduced AtREM1 protein contains several repeats of a B3-related domain, and it could represent a new class of regulatory proteins only found in plants. Expression of AtREM1 is developmentally regulated, ...
DOI:
10.1104/pp.010323
PubMed:
11842146
PubMed Central:
PMC148905

3. Biochemical and molecular characterization of a mutation that confers a decreased raffinosaccharide and phytic acid phenotype on soybean seeds

Author:
Hitz, W.D.; Carlson, T.J.; Kerr, P.S.; Sebastian, S.A.
Source:
Plant physiology 2002 v.128 no.2 pp. 650-660
ISSN:
0032-0889
Subject:
phytic acid; Glycine max; seeds; complementary DNA; phenotype; chemical constituents of plants; mutation; amino acid sequences; codons; polysaccharides
Abstract:
... A single, recessive mutation in soybean (Glycine max L. Merr.), which confers a seed phenotype of increased inorganic phosphate, decreased phytic acid, and a decrease in total raffinosaccharides, has been previously disclosed (S.A. Sebastian, P.S. Kerr, R.W. Pearlstein, W.D. Hitz [2000] Soy in Animal Nutrition, pp 56-74). The genetic lesion causing the multiple changes in seed phenotype is a singl ...
DOI:
10.1104/pp.010585
PubMed:
11842168
PubMed Central:
PMC148927

4. Biosynthesis and distribution of chlorophyll among the photosystems during recovery of the green alga Dunaliella salina from irradiance stress

Author:
Masuda, T.; Polle, J.E.W.; Melis, A.
Source:
Plant physiology 2002 v.128 no.2 pp. 603-614
ISSN:
0032-0889
Subject:
messenger RNA; biosynthesis; light harvesting complex; light intensity; photoinhibition; Dunaliella; photosystem II; photosystem I; chlorophyll; oxygenases
Abstract:
... To elucidate the mechanism of an irradiance-dependent adjustment in the chlorophyll (Chl) antenna size of Dunaliella salina, we investigated the regulation of expression of the Chl a oxygenase (CAO) and light-harvesting complex b (Lhcb) genes as a function of Chl availability in the photosynthetic apparatus. After a high-light to low-light shift of the cultures, levels of both CAO and Lhcb transcr ...
DOI:
10.1104/pp.010595
PubMed:
11842163
PubMed Central:
PMC148922

5. Characterization of calcium oxalates generated as biominerals in cacti

Author:
Monje, P.V.; Baran, E.J.
Source:
Plant physiology 2002 v.128 no.2 pp. 707-713
ISSN:
0032-0889
Subject:
interspecific variation; stems; Cactaceae; crystals; chemical constituents of plants; calcium oxalate; plant morphology; ultrastructure; chemical structure
Abstract:
... The chemical composition and morphology of solid material isolated from various Cactaceae species have been analyzed. All of the tested specimens deposited high-purity calcium oxalate crystals in their succulent modified stems. These deposits occurred most frequently as round-shaped druses that sometimes coexist with abundant crystal sand in the tissue. The biominerals wereidentified either as CaC ...
DOI:
10.1104/pp.010630
PubMed:
11842173
PubMed Central:
PMC148931

6. Chlorophyll biosynthesis. Expression of a second Chl I gene of magnesium chelatase in Arabidopsis supports only limited chlorophyll synthesis

Author:
Rissler, H.M.; Collakova, E.; DellaPenna, D.; Whelan, J.; Pogson, B.J.
Source:
Plant physiology 2002 v.128 no.2 pp. 770-779
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; protoporphyrin; messenger RNA; biosynthesis; chelating agents; open reading frames; magnesium; biochemical pathways; amino acid sequences; genes; mutants; chemical constituents of plants; chlorophyll
Abstract:
... Magnesium (Mg) chelatase is a heterotrimeric enzyme complex that catalyzes a key regulatory and enzymatic reaction in chlorophyll biosynthesis, the insertion of Mg2+ into protoporphyrin IX. Studies of the enzyme complex reconstituted in vitro have shown that all three of its subunits, CHL I, CHL D, and CHL H, are required for enzymatic activity. However, a new T-DNA knockout mutant of the chlorina ...
DOI:
10.1104/pp.010625
PubMed:
11842180
PubMed Central:
PMC148938

7. Control of gibberellin levels and gene expression during de-etiolation in pea

Author:
Reid, J.B.; Botwright, N.A.; Smith, J.J.; O'Neill, D.P.; Kerckhoffs, L.H.J.
Source:
Plant physiology 2002 v.128 no.2 pp. 734-741
ISSN:
0032-0889
Subject:
Pisum sativum; gibberellins; gene expression; plant development; red light; blue light; far-red light; phytochrome; photoreceptors; chemical constituents of plants
Abstract:
... Gibberellin A1 (GA1) levels drop significantly in wild-type pea (Pisum sativum) plants within 4 h of exposure to red, blue, or far-red light. This response is controlled by phytochrome A (phyA) (and not phyB) and a blue light receptor. GA8 levels are increased in response to 4 h of red light, whereasthe levels of GA19, GA20, and GA29 do not vary substantially. Red light appears to control GA1 leve ...
DOI:
10.1104/pp.010607
PubMed:
11842176
PubMed Central:
PMC148934

8. Cyclic electron flow around photosystem I in C3 plants. In vivo control by the redox state of chloroplasts and involvement of the NADH-dehydrogenase complex

Author:
Joet, T.; Cournac, L.; Peltier, G.; Havaux, M.
Source:
Plant physiology 2002 v.128 no.2 pp. 760-769
ISSN:
0032-0889
Subject:
far-red light; anaerobic conditions; thylakoids; electron transfer; Nicotiana tabacum; leaves; air; photosystem I
Abstract:
... Cyclic electron flow around photosystem (PS) I has been widely described in vitro in chloroplasts or thylakoids isolated from C3 plant leaves, but its occurrence in vivo is still a matter of debate. Photoacoustic spectroscopy and kinetic spectrophotometry were used to analyze cyclic PS I activity in tobacco (Nicotiana tabacum cv Petit Havana) leaf discs illuminated with far-red light. Only a very ...
DOI:
10.1104/pp.010775
PubMed:
11842179
PubMed Central:
PMC148937

9. Differential substrate inhibition couples kinetically distinct 4-coumarate:coenzyme A ligases with spatially distinct metabolic roles in quaking aspen

Author:
Harding, S.A.; Leshkevich, J.; Chiang, V.L.; Tsai, C.J.
Source:
Plant physiology 2002 v.128 no.2 pp. 428-438
ISSN:
0032-0889
Subject:
Populus tremuloides; ligases; metabolism; biochemical pathways; flavonoids; lignification; xylem; gene expression; phloem; nucleic acid hybridization
Abstract:
... 4-Coumarate:coenzyme A ligase (4CL) activates hydroxycinnamates for entry into phenylpropanoid branchways that support various metabolic activities, including lignification and flavonoid biosynthesis. However, it is not clear whether and how 4CL proteins with their broad substrate specificities fulfill the specific hydroxycinnamate requirements of the branchways they supply. Two tissue-specific 4C ...
DOI:
10.1104/pp.010603
PubMed:
11842147
PubMed Central:
PMC148906

10. Diurnal and circadian regulation of putative potassium channels in a leaf moving organ

Author:
Moshelion, M.; Becker, D.; Czempinski, K.; Mueller-Roeber, B.; Attali, B.; Hedrich, R.; Moran, N.
Source:
Plant physiology 2002 v.128 no.2 pp. 634-642
ISSN:
0032-0889
Subject:
protoplasts; membrane permeability; messenger RNA; Samanea saman; ion transport; amino acid sequences; diurnal variation; potassium; nucleotide sequences; light; plant vascular system; biological resistance; pulvinus; mesophyll; circadian rhythm
Abstract:
... In a search for potassium channels involved in light- and clock-regulated leaf movements, we cloned four putative K channel genes from the leaf-moving organs, pulvini, of the legume Samanea saman. The S. saman SPOCK1 is homologous to KCO1, an Arabidopsis two-pore-domain K channel, the S. saman SPORK1 is similar to SKOR and GORK, Arabidopsis outward-rectifying Shaker-like K channels, and the S. sam ...
DOI:
10.1104/pp.010549
PubMed:
11842166
PubMed Central:
PMC148925

11. Electrophysiological analysis of cloned cyclic nucleotide-gated ion channels

Author:
Leng, Q.; Mercier, R.W.; Hua, B.G.; Fromm, H.; Berkowitz, G.A.
Source:
Plant physiology 2002 v.128 no.2 pp. 400-410
ISSN:
0032-0889
Subject:
Nicotiana tabacum; Arabidopsis thaliana; electrophysiology; ion transport; nucleotide sequences; amino acid sequences; cyclic AMP; sodium; potassium; cations; cell membranes; Xenopus laevis; oocytes; RNA
Abstract:
... Electrophysiological studies were conducted on the cloned plant cyclic nucleotide-gated ion channels AtCNGC2 and AtCNGC1 from Arabidopsis, and NtCBP4 from tobacco (Nicotiana tabacum). The nucleotide coding sequences for these proteins were expressed in Xenopus laevis oocytes or HEK 293 cells. Channel characteristics were evaluated using voltage clamp analysis of currents in the presence of cAMP. A ...
DOI:
10.1104/pp.010832
PubMed:
11842144
PubMed Central:
PMC148903

12. Endogenous nod-factor-like signal molecules promote early somatic embryo development in Norway spruce

Author:
Dyachok, J.V.; Wiweger, M.; Kenne, L.; Arnold, S. von.
Source:
Plant physiology 2002 v.128 no.2 pp. 523-533
ISSN:
0032-0889
Subject:
tissue culture; molecular weight; embryo (plant); developmental stages; cell division; Picea abies; biochemical pathways; somatic embryogenesis; auxins; nodulation; oligosaccharides; culture media; apoptosis; chitinase
Abstract:
... Embryogenic cultures of Norway spruce (Picea abies) are composed of pro-embryogenic masses (PEMs) and somatic embryos of various developmental stages. Auxin is important for PEM formation and proliferation. In this report we show that depletion of auxin blocks PEM development and causes large-scale cell death. Extracts of the media conditioned by embryogenic cultures stimulate development of PEM a ...
DOI:
10.1104/pp.010547
PubMed:
11842156
PubMed Central:
PMC148915

13. Extrinsic photosystem II carbonic anhydrase in maize mesophyll chloroplasts

Author:
Lu, Y.K.; Stemler, A.J.
Source:
Plant physiology 2002 v.128 no.2 pp. 643-649
ISSN:
0032-0889
Subject:
polypeptides; carbon dioxide; Zea mays; carbonate dehydratase; molecular weight; thylakoids; electron transfer; photosystem II; anions; plant vascular system; Chlamydomonas reinhardtii; mesophyll
Abstract:
... One form of carbonic anhydrase (CA) has been observed in maize (Zea mays) thylakoids and photosystem II (PSII)-enriched membranes. Here, we show that an antibody produced against a thylakoid lumen-targeted CA found in Chlamydomonas reinhardtii reacts with a single 33-kD polypeptide in maize thylakoids. With immunoblot analysis, we found that this single polypeptide could be identified only in meso ...
DOI:
10.1104/pp.010643
PubMed:
11842167
PubMed Central:
PMC148926

14. FQR1, a novel primary auxin-response gene, encodes a flavin mononucleotide-binding quinone reductase

Author:
Laskowski, M.J.; Dreher, K.A.; Gehring, M.A.; Abel, S.; Gensler, A.L.; Sussex, I.M.
Source:
Plant physiology 2002 v.128 no.2 pp. 578-590
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; genes; oxidoreductases; binding proteins; messenger RNA; gene expression; protein synthesis; nucleotide sequences; amino acid sequences; enzyme activity; indole acetic acid; binding sites
Abstract:
... FQR1 is a novel primary auxin-response gene that codes for a flavin mononucleotide-binding flavodoxin-like quinone reductase. Accumulation of FQR1 mRNA begins within 10 min of indole-3-acetic acid application and reaches a maximum of approximately 10-fold induction 30 min after treatment. This increase in FQR1 mRNA abundance is not diminished by the protein synthesis inhibitor cycloheximide, demon ...
DOI:
10.1104/pp.010581
PubMed:
11842161
PubMed Central:
PMC148920

15. Functional analysis of the early steps of carotenoid biosynthesis in tobacco

Author:
Busch, M.; Seuter, A.; Hain, R.
Source:
Plant physiology 2002 v.128 no.2 pp. 439-453
ISSN:
0032-0889
Subject:
messenger RNA; biosynthesis; phenotype; pigmentation; antisense DNA; transgenic plants; plant characteristics; light intensity; height; biochemical pathways; ligases; gene expression; Nicotiana tabacum; carotenoids; leaves; chemical constituents of plants; phytoene synthase; oxygenases
Abstract:
... Carotenoids contribute to energy transduction in the light harvesting complexes and serve in protection from excess light fluence. Because of the importance of carotenoids, the genes encoding enzymes of carotenoid biosynthesis in higher plants are potential targets for herbicides. To obtain further insight into tobacco carotenoid biosynthesis and to investigate and prioritize potential herbicide t ...
DOI:
10.1104/pp.010573
PubMed:
11842148
PubMed Central:
PMC148907

16. Gravity-stimulated changes in auxin and invertase gene expression in maize pulvinal cells

Author:
Long, J.C.; Zhao, W.; Rashotte, A.M.; Muday, G.K.; Huber, S.C.
Source:
Plant physiology 2002 v.128 no.2 pp. 591-602
ISSN:
0032-0889
Subject:
Zea mays; cell growth; gravitropism; glucose; chemical constituents of plants; internodes; transcription (genetics); gene expression; auxins; beta-fructofuranosidase; genes; gravity; fructose; pulvinus
Abstract:
... Maize (Zea mays) stem gravitropism involves differential elongation of cells within a highly specialized region, the stem internodal pulvinus. In the present study, we investigated factors that control gravitropic responses in this system. In the graviresponding pulvinus, hexose sugars (D-Glc and D-Fru) accumulated asymmetrically across the pulvinus. This correlated well with an asymmetric increas ...
Handle:
10113/14364
DOI:
10.1104/pp.010579
PubMed:
11842162
PubMed Central:
PMC148921

17. Inactivation of the phloem-specific Dof zinc finger gene DAG1 affects response to light and integrity of the testa of Arabidopsis seeds

Author:
Papi, M.; Sabatini, S.; Altamura, M.M.; Hennig, L.; Schafer, E.; Costantino, P.; Vittorioso, P.
Source:
Plant physiology 2002 v.128 no.2 pp. 411-417
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; transcription factors; far-red light; seed germination; messenger RNA; testa; light intensity; phloem; genes; mutants; red light; phytochrome
Abstract:
... We show here that seeds from the knockout mutant of the Arabidopsis DAG1 gene encoding a Dof zinc finger transcription factor have an altered response to red and far-red light. Mutant dag1 seeds are induced to germinate by much lower red light fluence rates, and germination reaches more quickly a point where it is independent of phytochrome signaling. Moreover, although microscopic analysis reveal ...
DOI:
10.1104/pp.010488
PubMed:
11842145
PubMed Central:
PMC148904

18. Mutations in two independent genes lead to suppression of the shoot apical meristem in maize

Author:
Pilu, R.; Consonni, G.; Busti, E.; MacCabe, A.P.; Giulini, A.; Dolfini, S.; Gavazzi, G.
Source:
Plant physiology 2002 v.128 no.2 pp. 502-511
ISSN:
0032-0889
Subject:
Zea mays; genes; apical meristems; embryogenesis; embryo (plant); shoots; synergism; loci; homozygosity; mutants; heterozygosity; gene interaction; mutation; phenotype
Abstract:
... The shoot apical meristem (SAM), initially formed during embryogenesis, gives rise to the aboveground portion of the maize (Zea mays) plant. The shootless phenotype (sml) described here is caused by disruption of SAM formation due to the synergistic interaction of mutations at two genetic loci. Seedlings must be homozygous for both sml (shootmeristemless), and the unlinked dgr (distorted growth) l ...
DOI:
10.1104/pp.010767
PubMed:
11842154
PubMed Central:
PMC148913

19. Nonselective currents and channels in plasma membranes of protoplasts from coats of developing seeds of bean

Author:
Zhang, W.H.; Skerrett, M.; Walker, N.A.; Patrick, J.W.; Tyerman, S.D.
Source:
Plant physiology 2002 v.128 no.2 pp. 388-399
ISSN:
0032-0889
Subject:
protoplasts; inorganic ions; testa; cell walls; lanthanum; calcium; ion transport; sieve elements; chlorides; Phaseolus vulgaris; cations; cesium; potassium; barium; gadolinium; symplast; seed development
Abstract:
... In developing bean (Phaseolus vulgaris) seeds, phloem-imported nutrients move in the symplast from sieve elements to the ground parenchyma cells where they are transported across the plasma membrane into the seed apoplast. To study the mechanisms underlying this transport, channel currents in ground parenchyma protoplasts were characterized using patch clamp. A fast-activating outward current was ...
DOI:
10.1104/pp.010566
PubMed:
11842143
PubMed Central:
PMC148902

20. Oxygen deficiency responsive gene expression in Chlamydomonas reinhardtii through a copper-sensing signal transduction pathway

Author:
Quinn, J.M.; Eriksson, M.; Moseley, J.L.; Merchant, S.
Source:
Plant physiology 2002 v.128 no.2 pp. 463-471
ISSN:
0032-0889
Subject:
transcription factors; anaerobic conditions; loci; ions; copper; mercury; biochemical pathways; gene expression; oxidoreductases; cytochrome c; genes; Chlamydomonas reinhardtii; oxygen
Abstract:
... Chlamydomonas reinhardtii activates Cpx1, Cyc6, and Crd1, encoding, respectively, coproporphyrinogen oxidase, cytochrome c6, and a novel di-iron enzyme when transferred to oxygen-deficient growth conditions. This response is physiologically relevant because C. reinhardtii experiences these growth conditions routinely, and furthermore, one of the target genes, Crd1, is functionally required for nor ...
DOI:
10.1104/pp.010694
PubMed:
11842150
PubMed Central:
PMC148909