Abstract:
:Calcium flux in sunflower (Helianthus annuus L. cv Russian mammoth) hypocotyl was measured with a Ca(2+) electrode as the increase or decrease in Ca(2+) in an aqueous solution (10 micromolar CaCl(2)) in contact with either the basal or apical end of 20 millimeter segments. Ca(2+) efflux was significantly higher at the apical end compared with the basal end; this apparent polarity was maintained even when the segments were inverted. No significant difference was observed in the cation exchange capacity of apical and basal cell walls that could explain the difference in Ca(2+) efflux at opposite ends of the hypocotyl segment. The presence of exogenous indoleacetic acid (IAA) in the segment medium resulted in the promotion of both Ca(2+) efflux and segment elongation. However, osmotic inhibition of the IAA-induced elongation did not result in inhibiting the IAA-induced Ca(2+) efflux. Ca(2+) efflux was inhibited by cyanide. Lowering the temperature from 25 degrees C also caused the gradual reduction of Ca(2+) efflux; at 5 degrees C the hypocotyl segments showed a net absorption of Ca(2+) from the segment medium. These findings support the suggestion that: (a) the observed Ca(2+) efflux in hypocotyl segments is probably the manifestation of the system which maintains the transmembrane Ca(2+) gradient at the cellular level. (b) The acropetal polarity of Ca(2+) efflux may be the result of the involvement of Ca(2+) in the basipetal transport of IAA.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
de Guzman CC,Dela Fuente RKdoi
10.1104/pp.81.2.408subject
Has Abstractpub_date
1986-06-01 00:00:00pages
408-12issue
2eissn
0032-0889issn
1532-2548journal_volume
81pub_type
杂志文章相关文献
PLANT PHYSIOLOGY文献大全abstract::Superoxide dismutases (SODs) are ubiquitous metalloenzymes that catalyze the dismutation of superoxide radicals. Chloroplasts have two isozymes, copper/zinc SOD (Cu/ZnSOD) and iron SOD (FeSOD), encoded by nuclear genes. Because bryophytes are considered as the earliest land plants, they are one of the most interesting...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.107.114868
更新日期:2008-04-01 00:00:00
abstract::The white petals of chrysanthemum (Chrysanthemum morifolium Ramat.) are believed to contain a factor that inhibits the accumulation of carotenoids. To find this factor, we performed polymerase chain reaction-Select subtraction screening and obtained a clone expressed differentially in white and yellow petals. The dedu...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.106.087130
更新日期:2006-11-01 00:00:00
abstract::The net initial passive flux (J(Ni)) in reconstituted plasma membrane (PM) vesicles from maize (Zea mays) root cells was measured as recently described (P. Pouliquin, J.-P. Grouzis, R. Gibrat ¿1999 Biophys J 76: 360-373). J(Ni) in control liposomes responded to membrane potential or to NO(3)(-) as expected from the Go...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.122.1.265
更新日期:2000-01-01 00:00:00
abstract::alpha-Amylases are important enzymes for starch degradation in plants. However, it has been a long-running debate as to whether alpha-amylases are localized in plastids where starch is stored. To study the subcellular localization of alpha-amylases in plant cells, a rice (Oryza sativa) alpha-amylase, alphaAmy3, with o...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.104.042184
更新日期:2004-07-01 00:00:00
abstract::Effects of the herbicide safeners N,N-diallyl-2,2-dichloroacetamide and 4-dichloroacetyl-3,4-dihydro-3-methyl-2H-1,4-benzooxazin (CGA 154281) on the contents in cysteine and glutathione, on the assimilation of (35)SO(4) (2-), and on the enzymes of assimilatory sulfate reduction were analyzed in roots and primary leave...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.94.4.1808
更新日期:1990-12-01 00:00:00
abstract::Enolase (2-phospho-D-glycerate hydrolase, EC 4.2.1.11) has been identified as an anaerobic stress protein in Echinochloa oryzoides based on the homology of its internal amino acid sequence with those of enolases from other organisms, by immunological reactivity, and induction of catalytic activity during anaerobic str...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.109.2.433
更新日期:1995-10-01 00:00:00
abstract::Exogenous application of gibberellic acid (GA(3)) was able to reverse the inhibitory effect of salt, oxidative, and heat stresses in the germination and seedling establishment of Arabidopsis (Arabidopsis thaliana), this effect being accompanied by an increase in salicylic acid (SA) levels, a hormone that in recent yea...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.109.139352
更新日期:2009-07-01 00:00:00
abstract::Seed germination is a critical stage in the plant life cycle and the first step toward successful plant establishment. Therefore, understanding germination is of important ecological and agronomical relevance. Previous research revealed that different seed compartments (testa, endosperm, and embryo) control germinatio...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.113.223511
更新日期:2013-09-01 00:00:00
abstract::Ecophysiological models predict quantitative traits of one genotype in any environment, whereas quantitative trait locus (QTL) models predict the contribution of alleles to quantitative traits under a limited number of environments. We have combined both approaches by dissecting into effects of QTLs the parameters of ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.013839
更新日期:2003-02-01 00:00:00
abstract::The respiration rise in bulky storage organs induced by ethylene plus pure O(2) is accompanied by an increase in the CN-resistant respiration, or alternative path. Whereas a lesser respiratory stimulation in response to ethylene is demonstrable in air and increased by peeling, ethylene-induced alternative path develop...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.69.5.1036
更新日期:1982-05-01 00:00:00
abstract::Aroma contributes to the unique flavors of fruits and is important for fruit quality evaluation. Among the many volatiles in peach (Prunus persica) fruits, γ-decalactone has the greatest contribution to the characteristic peach aroma. Some peach cultivars have γ-decalactone contents that are too low to detect. Compari...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.19.00964
更新日期:2020-04-01 00:00:00
abstract::Ethylene at hormonally significant levels inhibited net photosynthesis of the cultivated peanut (Arachis hypogaea L.) as measured by gas analysis. Upon the removal of ethylene, the inhibition was naturally overcome at the concentration-exposure duration combinations tested. Increased length of exposure of 1 microliter...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.70.2.598
更新日期:1982-08-01 00:00:00
abstract::Immune responses of Arabidopsis (Arabidopsis thaliana) are at least partially mediated by coordinated transcriptional up-regulation of plant defense genes, such as the Late/sustained Up-regulation in Response to Hyaloperonospora parasitica (LURP) cluster. We found a defined region in the promoter of the LURP member Ca...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.108.133678
更新日期:2009-05-01 00:00:00
abstract::To examine the role of isoamylase1 (ISA1) in amylopectin biosynthesis in plants, a genomic DNA fragment from Aegilops tauschii was introduced into the ISA1-deficient rice (Oryza sativa) sugary-1 mutant line EM914, in which endosperm starch is completely replaced by phytoglycogen. A. tauschii is the D genome donor of w...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.104.051359
更新日期:2005-01-01 00:00:00
abstract::Sex determination in cucumber (Cucumis sativus L.) is controlled largely by three genes: F, m, and a. The F and m loci interact to produce monoecious (M_f_) or gynoecious (M_f_) sex phenotypes. Ethylene and factors that induce ethylene biosynthesis, such as 1-aminocyclopropane-1-carboxylate (ACC) and auxin, also enhan...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.113.3.987
更新日期:1997-03-01 00:00:00
abstract::The enzyme 3'-AMP nucleotidase was purified 2,500- to 5,000-fold from extracts of an acetone powder of wheat (Triticum aestivum) embryonic axes germinated for 40 hours. Sodium dodecyl sulfate acrylamide gel electrophoresis and chromatography on Biogel-P100 indicate that the enzyme is monomeric with a molecular weight ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.71.2.295
更新日期:1983-02-01 00:00:00
abstract::The cyanobacterial CO2-concentrating mechanism (CCM) allows photosynthesis to proceed in CO2-limited aquatic environments, and its activity is modulated in response to inorganic carbon (Ci) availability. Real-time reverse transcriptase-PCR analysis was used to examine the transcriptional regulation of more than 30 CCM...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.103.029728
更新日期:2003-12-01 00:00:00
abstract::Effects of O(2) and some respiratory inhibitors on the induction and release of bud dormancy were examined with the aerial tubers of different ages of Begonia evansiana Andr. Oxygen was needed not only for tuber sprouting but also during the chilling process at 2 to 5 C to break tuber dormancy. If the mature tubers we...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.51.3.504
更新日期:1973-03-01 00:00:00
abstract::Purified ribulose-1,5-bisphosphate carboxylase/oxygenase in 50% saturated (NH(4))(2)SO(4) was stable when frozen as small beads in liquid nitrogen and stored at -80 C. When stored as a slurry at 4 C most of the activity was lost within four weeks. This loss was due not only to enzyme polymerization. Activity in old pr...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.67.6.1220
更新日期:1981-06-01 00:00:00
abstract::We have described the modulation of four auxin-regulated genes during the growth cycle of suspension-cultured tobacco (Nicotiana tabacum [L.] var White Burley) cells. The genes were transiently expressed 2 to 8 h after transfer of stationary phase cells to fresh medium, during the transition from the quiescent phase o...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.102.2.513
更新日期:1993-06-01 00:00:00
abstract::Soybean plants (Glycine max var. Ransom) were grown at light intensities of 850 and 250 mueinsteins m(-2) sec(-1) of photosynthetically active radiation. A group of plants was shifted from each environment into the other environment 24 hours before the beginning of the experiment. Net photosynthetic rates and stomatal...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.60.2.255
更新日期:1977-08-01 00:00:00
abstract::The Arabidopsis (Arabidopsis thaliana) root epidermal bulger1-1 (reb1-1) mutant (allelic to root hair defective1 [rhd1]) is characterized by a reduced root elongation rate and by bulging of trichoblast cells. The REB1/RHD1 gene belongs to a family of UDP-D-Glucose 4-epimerases involved in the synthesis of D-Galactose ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.105.074997
更新日期:2006-04-01 00:00:00
abstract::Magnesium (Mg) chelatase is a heterotrimeric enzyme complex that catalyzes a key regulatory and enzymatic reaction in chlorophyll biosynthesis, the insertion of Mg(2+) 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 re...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.010625
更新日期:2002-02-01 00:00:00
abstract::Combined gas chromatography-mass spectrometry has been used to identify indole-3-methanol in a purified buffer extract from etiolated seedlings of Pinus sylvestris L. Quantitative estimates obtained by high performance liquid chromatography with fluorescence detection, corrected for losses occurring during purificatio...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.77.4.952
更新日期:1985-04-01 00:00:00
abstract::The light intensity-dependent transition to state 1 of dark-adapted anaerobic state 2 Chlamydomonas reinhardtii cells is stimulated by oxygen and by other electron acceptors for photosystem I, such as oxaloacetate and methylviologen. This suggests that the transition to state 1 requires the oxidation of the intersyste...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.104.048256
更新日期:2005-02-01 00:00:00
abstract::Trichome development is dependent on gibberellin (GA) signaling in Arabidopsis thaliana. Using the GA-deficient mutant ga1-3, the GA-response mutant spy-5, and uniconazol (a GA-biosynthesis inhibitor), we show that the GA level response correlates positively with both trichome number and trichome branch number. Two ge...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.117.2.375
更新日期:1998-06-01 00:00:00
abstract::High temperature stress reduces grain growth in wheat (Triticum aestivum L.) by altering source activity and sink capacity. The impact of stress on source and sink interactions in two wheat cultivars of differing source thermotolerance was monitored by analysis of chlorophyll fluorescence transients, Fv (variable fluo...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.92.3.654
更新日期:1990-03-01 00:00:00
abstract::Soil salinity is one of the most significant abiotic stresses for crop plants, including legumes. These plants can establish root symbioses with nitrogen-fixing soil bacteria and are able to grow in nitrogen-poor soils. Medicago truncatula varieties show diverse adaptive responses to environmental conditions, such as ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.107.106146
更新日期:2007-12-01 00:00:00
abstract::Late maturity α-amylase (LMA) is a genetic defect that is commonly found in bread wheat (Triticum aestivum) cultivars and can result in commercially unacceptably high levels of α-amylase in harvest-ripe grain in the absence of rain or preharvest sprouting. This defect represents a serious problem for wheat farmers, an...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.112.209502
更新日期:2013-03-01 00:00:00
abstract::Ethylene evolved from monoecious and gynoecious cucumber (Cucumis sativus) plants grown under short and long day conditions was determined. More ethylene was evolved from floral buds and apices bearing buds than from whole seedlings of comparable weight. More ethylene also was evolved from apices of the gynoecious tha...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.49.6.998
更新日期:1972-06-01 00:00:00