(1) Penicillin-induced RNase production is completely inhibited by abscisic acid.
(2) In this study, we demonstrated that a second "coupling element," identified as O2S, must be present to allow a single copy of either the gibberellin response element (GARE) or the abscisic acid response element (ABRE) to mediate their hormonal effects in the barley Amy32b alpha-amylase gene promoter.
(3) In contrast to previously described mutants of Arabidopsis and N. plumbaginifolia, all of the present mutants were specifically resistant to auxin; the mutants were cross-resistant to several auxins, but showed no increased resistance to cytokinin, abscisic acid, ethylene or 1-amino-cyclopropane-1-carboxylic acid.
(4) Earlier studies indicated that most Lea mRNAs, but no storage protein mRNAs, are induced in excised embryos exposed to abscisic acid (ABA).
(5) Removal of the 4-hydrogen atom from methyl abscisate by formation of a derivative, a lactone, lacking this hydrogen atom changed the ratio to 3:1.04 for material derived from [2-(14)C,(2R)-2-(3)H(1)]-mevalonate and to 3:1.05 for [2-(14)C,(2S)-2-(3)H(1)]mevalonate, showing that this hydrogen atom also is derived from the pro-2R-hydrogen atom of mevalonate.
(6) Certain drought-induced proteins also accumulated in leaves subjected to heat shock (39 degrees C) or exogenous abscisic acid (ABA, 1 mM) treatments.
(7) The HAL1 gene and encoded protein are conserved in plants, being induced in these organisms by salt stress and abscisic acid.
(8) Abscisic acid always accelerates the onset of and enhances the magnitude of the increase in activity of acid phosphatase; this is followed by an acceleration of the onset of a rapid increase in free space.RNase activity increases 2- to 5-fold after cutting of leaf sections.
(9) The endonuclease activity of the aleurone tissue incubated with gibberellic acid is higher than the level of this endonuclease in tissue treated with abscisic acid or water alone.
(10) We have isolated a new maize gene, rab28, that responds to abscisic acid (ABA) treatment.
(11) Abscisic acid also potentiated, in a dose-dependent manner the K+ response of rat vas deferens, but this action was far more pronounced in the tonic component of the epididymal portion.
(12) We have determined the nucleotide sequences of Amy32b, a type A alpha-amylase gene, and of the gene for aleurain, a thiol protease closely related to mammalian cathepsin H. Both are expressed in barley aleurone cells under control of the plant hormones gibberellic acid and abscisic acid, but only aleurain is expressed at high levels in other barley tissues.
(13) Abscisic acid inhibits this gibberellic acid-enhanced increase in the rate of synthesis of endoplasmic reticulum.
(14) Induction of pin2 expression in leaves by treatment with the plant growth regulators abscisic acid and jasmonic acid, and the general metabolite sucrose, depends on the presence of the regulatory element involved in expression in tubers and wounded leaves.
(15) The presence of abscisic acid conjugates that are present in plants has also been identified in brain.
(16) In order to use the system to isolate genes involved in the signal transduction of abscisic acid, we fine-mapped the mutant loci abi-1 and abi-2, which confer abscisic acid insensitivity, relative to RFLPs and isolated the corresponding YACs.
(17) A method of analysis of 3-indolylacetic acid (IAA) and abscisic acid (ABA), allowing the simultaneous extraction of both regulators from plant material, has been developed.
(18) In this publication, a more detailed analysis of the expression of these cDNA classes was performed with respect to wounding in various tomato organs, development, kinetics and systemic extent of the wound response, ethylene treatment, abscisic acid (ABA) treatment, and drought stress by using RNA gel blot hybridizations.
(19) Significant expression associated only with postabscission or free abscisic acid is restricted to that of the Lea mRNAs earlier suggested to be a component of the embryo's preparation for desiccation.
(20) In the DMPC vesicles, using the distributional approach, higher center and width values were observed in the presence of abscisic acid (ABA), indicating a decrease in the dielectric constant of the lipid phase that we attribute to a decrease in the water concentration within the bilayer.
Abscission
Definition:
(n.) The act or process of cutting off.
(n.) The state of being cut off.
(n.) A figure of speech employed when a speaker having begun to say a thing stops abruptly: thus, "He is a man of so much honor and candor, and of such generosity -- but I need say no more."
Example Sentences:
(1) Differences in posture were not associated with differences in abscissal intercepts in either Quad or Con.
(2) In leaves abscission is accompanied by increased occurrence of cellulase forms differing in isoelectric point (pI 6.5 and 9.5).
(3) The slopes and abscissal intercepts were significantly (P less than 0.05) different.
(4) The abscissal intercept was significantly different (P less than 0.025).
(5) I hope I may crave an indulgence to use your paper to put on public record that I was one of those opposed to this government's policy of abscission against the vulnerable.
(6) It decreased in cells which had completed nuclear migration and before abscission of the bud had occurred.
(7) An indirect immunohistochemical technique was developed using a rabbit anti-abscissic acid (ABA) serum and the soluble peroxidase-antiperoxidase (PAP) complex for the localization of endogenous ABA in the aerial parts of Chenopodium.
(8) We tested this method in tomato using two genomic intervals containing genes responsible for regulating pedicle abscission (jointless) and fruit ripening (non-ripening).
(9) These are associated with the cotyledon stage, the endogenous concentration of free abscisic acid, maturation (reserve accumulation), ovule abscission, and germination.
(10) Direct binding assays and results from immunological studies indicate that more binding protein is present in abscission zones of Phaseolus than in petioles; ethylene treatment increases binding site abundance in abscission zones.
(11) The major programs of gene expression during late embryogenesis are the muturation or reserve accumulation program and, after ovule abscission, the postabscission program that is composed largely of Lea and LeaA mRNAs that probably encode desiccation protectants.
(12) Maturation-stage embryos both terminate the maturation program and induce the postabscission program after excision and culture, just as they do later in the plant after ovule abscission.
(13) From this study we have got the conclusion that elective renal-sparing excision of the tumor (with macro-micro examination of the abscission surfaces) should be considered as a curative treatment in the case of low stage single tumors smaller than 7 cm, peripherally located in renal cortex, with unbroken pseudocapsule.
(14) The occurrence in the cytoplasm around the proplastid of bodies not connected to the proplastid, but identical in structure to the evaginations and carrying a membranous tail suggests that the evaginations are released by abscission of the channel close to the surface of the parent body.
(15) The organisms used in assays were: Coleus explants (leaf abscission); turnip (germination); pea (growth inhibition and Hg uptake); a planarian (regeneration); the brineshrimp (excystment, phototaxy); the mealworm larva Tenebrio (metamorphosis) and the fish "tilapia" (survival, Hg uptake).
(16) However, tumor enucleation, including examination of the abscission surfaces by immediate per operative section should be considered as a curative treatment.
(17) A northern analysis carried out with a cDNA coding for tomato endopolygalacturonase shows hybridization only with one endopolygalacturonase mRNA form in the fruit abscission zone.
(18) Osteoclastic erosion across an abscission line between the dead bone of the antler and the living bone of the pedicle was found to be responsible for the separation of the 2.
(19) We demonstrate here the specific and saturable labeling of a population of larval receptors with the GABA analog beta-(p-chlorophenyl)-[3H]GABA ([3H]baclofen); identification of these labeled receptors with those controlling metamorphosis is suggested by four independent criteria: the effectiveness of GABA and its close structural analogs to induce metamorphosis is closely correlated with the effectiveness of these compounds to compete for binding to this receptor; the natural inducer purified from the recruiting algae competes for binding to this receptor; (-)-[3H]baclofen specifically bound to the receptors is shed from the larvae after approximately 20 hr, at the time corresponding to the metamorphic abscission and shedding of sensory cilia and other structures from the larvae; and the availability of the receptors for labeling and the ability of the larvae to respond to GABA and GABA analogs can be down-regulated in parallel by habituation of the larvae early in their development.
(20) The apparent threshold for AVP release (defined as the abscissal intercept of the regression line relating plasma AVP [PAVP] to Posmol) was also decreased significantly throughout gestation, as was the osmotic threshold for thirst (derived from analogue scales relating desire to drink to Posmol).