Abstract:
:A method was developed where soybean seedlings were grown without roots to study the influence of hormones of root origin on shoot growth. Excision of the root resulted in inhibition of apical section growth and DNA synthesis and inhibited elongating section growth. A synthetic cytokinin restored DNA synthesis in the apical section, but did not influence growth in either the apical or elongating sections. Low concentrations of gibberellin with the cytokinin restored growth in the apical section. Gibberellin alone was sufficient to restore growth in the elongating section. An inhibitor of DNA synthesis, 5-fluorodeoxyuridine, inhibited the increase in apical section DNA without inhibiting control or gibberellin-induced growth in the elongating section. Experiments with (14)C-thymidine resulted in no DNA labeling differences in the elongating section under conditions where gibberellin-induced elongation varied from 50% to 73% above controls. It was concluded that gibberellin-induced elongation in soybean hypocotyl occurred in the absence of DNA synthesis. Gibberellin does stimulate DNA synthesis in the apical tissue apart from its effect on cell elongation. Excised soybean hypocotyl elongated maximally at 10(-6)m auxin. At higher auxin concentrations, fresh weight and ethylene production increased, but elongation was reduced. Addition of GA to the higher auxin concentrations resulted in a 50% inhibition in auxin-induced ethylene production and resumption in maximal elongation. Added ethylene inhibited elongation 30% at 2 mul/l. Addition of up to 100 mul/l ethylene did not inhibit elongation with GA present in the incubation medium. Thus GA may counteract ehtylene inhibition of cell elongation in addition to inhibiting ethylene production in auxin-treated tissues.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Holm RE,Key JLdoi
10.1104/pp.44.9.1295subject
Has Abstractpub_date
1969-09-01 00:00:00pages
1295-302issue
9eissn
0032-0889issn
1532-2548journal_volume
44pub_type
杂志文章相关文献
PLANT PHYSIOLOGY文献大全abstract::Addition of excess copper to nongrowing cells of a normal, green Chlorella caused a reduction in total pigments and a blue shift of chlorophyll absorption, concurrent with the inhibition of photosynthesis. Chlorophylless yellow and white mutant strains of the same alga showed a rise in nonspecific absorption (i.e., ch...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.46.2.183
更新日期:1970-08-01 00:00:00
abstract::Trehalose, an alpha,alpha-diglucoside, induced a rapid blackening and death of shoot tips of Cuscuta reflexa (dodder) cultured in vitro. The onset of toxic symptom was delayed if any of the several sugars which support the in vitro growth of Cuscuta was supplied with trehalose. The rate of trehalose uptake or its accu...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.69.6.1247
更新日期:1982-06-01 00:00:00
abstract::Decomposition of 2-chloroethylphosphonic acid (Ethephon) was studied in dried films at various water vapor pressures (0.6 to 86.9 millimeters Hg, 3.2 to 93.9% relative humidity) and temperatures (20, 30, 40, and 50 C) at pH 6.3 and 7.0. The rate of decomposition could be determined equally well by [(14)C]Ethephon or e...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.63.3.474
更新日期:1979-03-01 00:00:00
abstract::Yen1/GEN1 are canonical Holliday junction resolvases that belong to the RAD2/XPG family. In eukaryotes, such as budding yeast, mice, worms, and humans, Yen1/GEN1 work together with Mus81-Mms4/MUS81-EME1 and Slx1-Slx4/SLX1-SLX4 in DNA repair by homologous recombination to maintain genome stability. In plants, the biolo...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.16.01726
更新日期:2017-02-01 00:00:00
abstract::In culture, the phytopathogenic fungus Phytophthora cryptogea secretes a protein which elicits hypersensitive-like necroses and protects tobacco plants against invasion by the pathogen Phytophthora parasitica var. nicotianae. This protein, named cryptogein, has been purified and its amino acid sequence determined. In ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.95.2.486
更新日期:1991-02-01 00:00:00
abstract::In an earlier paper we showed that in fully developed barley (Hordeum vulgare L.) root epidermal cells a decrease in cytosolic K+ was associated with an acidification of the cytosol (D.J. Walker, R. A. Leigh, A.J. Miller [1996] Proc Natl Acad Sci USA 93: 10510-10514). To show that these changes in cytosolic ion concen...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.118.3.957
更新日期:1998-11-01 00:00:00
abstract::In air largely freed from CO(2), senescence of isolated oat (Avena sativa cv Victory) seedling leaves is no longer prevented by white light; instead, the leaves lose both chlorophyll and protein as rapidly as in the dark. Senescence in light is also accelerated in pure O(2), but it is greatly delayed in N(2); 100% N(2...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.71.1.67
更新日期:1983-01-01 00:00:00
abstract::Amylase was found in high activity (193 international units per milligram protein) in the tap root of alfalfa (Medicago sativa L. cv. Sonora). The activity was separated by gel filtration chromatography into two fractions with molecular weights of 65,700 (heavy amylase) and 41,700 (light amylase). Activity staining of...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.69.5.1096
更新日期:1982-05-01 00:00:00
abstract::The functions of mitochondria during leaf senescence, a type of programmed cell death aimed at the massive retrieval of nutrients from the senescing organ to the rest of the plant, remain elusive. Here, combining experimental and analytical approaches, we showed that mitochondrial integrity in Arabidopsis (Arabidopsis...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.16.01463
更新日期:2016-12-01 00:00:00
abstract::The expression of alternative oxidase (Aox) and uncoupling proteins (Ucp) was investigated during ripening in mango (Mangifera indica) and compared with the expression of peroxisomal thiolase, a previously described ripening marker in mango. The multigene family for the Aox in mango was expressed differentially during...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.126.4.1619
更新日期:2001-08-01 00:00:00
abstract::Sensitive differential scanning calorimetry was employed to investigate thylakoid membrane structure. Calorimetric scans of chloroplast membranes suspended in a low ionic strength Hepesbuffered medium revealed endothermic transitions centered at the following temperatures ( degrees C): A (42.5), B (60.6), C(1) (64.9),...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.90.2.575
更新日期:1989-06-01 00:00:00
abstract::The objective of this study was to determine if mRNA sequences downstream of the translation initiation codon are important for translation of plastid mRNAs. We have employed a transgenic approach, measuring accumulation of the neomycin phosphotransferase (NPTII) reporter enzyme translationally fused with 14 N-termina...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.125.1.430
更新日期:2001-01-01 00:00:00
abstract::Inactivation of the nonessential ω-subunit of the RNA polymerase core in the ΔrpoZ strain of the model cyanobacterium Synechocystis sp. PCC 6803 leads to a unique high-CO2-sensitive phenotype. Supplementing air in the growth chamber with 30 mL L-1 (3%) CO2 accelerated the growth rate of the control strain (CS) 4-fold,...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.16.01953
更新日期:2017-05-01 00:00:00
abstract::After 3 days of exposure to 10(-3) and 10(-4) M decenylsuccinic acid, winter wheat plants wilted and died. Decenylsuccinate at 10(-3) M inhibited (32)P uptake by barley roots and wheat roots and resulted in significant (P = 0.05) leakage of previously absorbed (32)P and total phosphorus (barley roots). Decenylsuccin...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.45.1.1
更新日期:1970-01-01 00:00:00
abstract::The sink-source conversion in developing leaves of tobacco (Nicotiana tabacum L.) was studied to determine whether import termination is caused by the onset of export or is related to achievement of positive carbon balance. Albino shoots were grown in vitro and grafted to detopped stems of green tobacco plants. Termin...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.76.1.45
更新日期:1984-09-01 00:00:00
abstract::To gain some insight into the mechanism of plant programmed cell death, certain features of cytochrome c (cyt c) release were investigated in heat-shocked tobacco (Nicotiana tabacum) Bright-Yellow 2 cells in the 2- to 6-h time range. We found that 2 h after heat shock, cyt c is released from intact mitochondria into t...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.106.078683
更新日期:2006-05-01 00:00:00
abstract::Enhanced disease susceptibility1 (EDS1) and phytoalexin deficient4 (PAD4) are well-known regulators of both basal and resistance (R) protein-mediated plant defense. We identified two EDS1-like (GmEDS1a/GmEDS1b) proteins and one PAD4-like (GmPAD4) protein that are required for resistance signaling in soybean (Glycine m...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.114.242495
更新日期:2014-07-01 00:00:00
abstract::By using immunofluorescence microscopy, we observed rapidly altered distribution patterns of cell wall pectins in meristematic cells of maize (Zea mays) and wheat (Triticum aestivum) root apices. This response was shown for homogalacturonan pectins characterized by a low level (up to 40%) of methylesterification and f...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.006163
更新日期:2002-09-01 00:00:00
abstract::The fossil record and models of atmospheric concentrations of O2 and CO2 suggest that past shifts in plant ecological dominance often coincided with dramatic changes in Earth's atmospheric composition. This study tested the effects of past changes in atmospheric composition on the photosynthetic physiology of a limite...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.19.00749
更新日期:2019-11-01 00:00:00
abstract::Genetic improvement of plant architecture is one of the strategies for increasing the yield potential of rice (Oryza sativa). Although great progress has been made in the understanding of plant architecture regulation, the precise mechanism is still an urgent need to be revealed. Here, we report that over-expression o...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.17.00964
更新日期:2018-01-01 00:00:00
abstract::Abscisic acid (ABA) in the stem of akamatsu (Pinus densiflora) was identified and quantified by gas chromatography-mass spectrometry-selected ion monitoring using hexadeuterated ABA as an internal standard. tert-Butyldimethylsilyl ester was used as a derivative of ABA. This derivative had high sensitivity and selectiv...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.88.3.525
更新日期:1988-11-01 00:00:00
abstract::The sugar compositions of root hairs of a variety of plant species were determined. Root hairs of legumes had very similar compositions, whereas those of different families varied widely. Only approximately 50% of the weight of the root hairs of legumes could be accounted for by sugar. Up to 80% of the weight of root ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.86.2.638
更新日期:1988-02-01 00:00:00
abstract::The Medicago truncatula line 2HA has a 500-fold greater capacity to regenerate plants in culture by somatic embryogenesis than wild-type Jemalong. We have compared proteomes of tissue cultures from leaf explants of these two lines. Both 2HA and Jemalong explants were grown on media containing the auxin 1-naphthaleneac...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.104.055277
更新日期:2005-04-01 00:00:00
abstract::Micro-RNAs are recognized as important posttranscriptional regulators in plants. The relevance of micro-RNAs as regulators of the legume-rhizobia nitrogen-fixing symbiosis is emerging. The objective of this work was to functionally characterize the role of micro-RNA172 (miR172) and its conserved target APETALA2 (AP2) ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.114.255547
更新日期:2015-05-01 00:00:00
abstract::We have cloned and characterized a cDNA encoding a maize (Zea mays L.) heat shock protein (HSP), HSP26. The mRNA of HSP26 is present as a single mRNA species of 1.1 kilobase pairs in size and is detectable when maize seedlings are treated at 40 degrees C but not at 28 degrees C. Accumulation of HSP26 mRNA was detected...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.93.4.1321
更新日期:1990-08-01 00:00:00
abstract::The incorporation of [(14)C]phenylalanine and [1,6-(14)C]shikimic acid into tyrosine was investigated in the callus of Portulaca grandiflora, var. JR (L.). By inhibiting phenylalanine with 1-alpha-aminooxy-beta-phenyl-propionic acid and tyrosinase with 1-cysteine-HCl and hydrazine-hydrate, the possible synthesis of ty...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.68.2.272
更新日期:1981-08-01 00:00:00
abstract::Transgenic tobacco plants carrying a fusion between the nopaline synthase (nos) promoter and chloramphenicol acetyltransferase (CAT) reporter gene (cat) were studied for their inducibility by salicylic acid (SA) or methyl jasmonate (MJ) treatments. Either chemical significantly increased CAT activity to a level much h...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.103.1.97
更新日期:1993-09-01 00:00:00
abstract::The existence of different auxin sensitivities in epidermal and subepidermal tissues (KV Thimann, CL Schneider 1938 Plant Physiol 25: 627-641) suggests a refinement to the Cholodny-Went theory which overcomes some of the difficulties associated with it. A model is presented to account for the inverse tropic responses ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.84.3.568
更新日期:1987-07-01 00:00:00
abstract::Maximum freezing tolerance of Arabidopsis thaliana L. Heyn (Columbia) was attained after 1 week of cold acclimation at 2[deg]C. During this time, there were significant changes in both the lipid composition of the plasma membrane and the freeze-induced lesions that were associated with injury. The proportion of phosph...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.109.1.15
更新日期:1995-09-01 00:00:00
abstract::Alternative splicing (AS) can add significantly to genome complexity. Plants are thought to exhibit less AS than animals. An algorithm, based on expressed sequence tag (EST) pairs gapped alignment, was developed that takes advantage of the relatively small intron and exon size in plants and directly compares pairs of ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.107.098640
更新日期:2007-07-01 00:00:00