Showing papers in "Plant Science Letters in 1976"

TL;DR: Cultures derived from Mucuna pruriens have been shown to accumulate high levels of L-DOPA, particularly in the medium, and this accumulation can be influenced by alteration of the 2,4-D concentration in themedium.

TL;DR: In culture only N. sylvestris had a low plating efficiency, although N. otophora protoplasts were found to be sensitive to light, and plants were recovered from callus tissue originating from isolated protoplast of all the species and hybrids.

TL;DR: Results showing the remarkable activity of FC in stimulating proton secretion in root segments are interpreted as indicating that FC activates in roots, as in a wide variety of other plant organs, an electrogenic mechanism of proton extrusion deeply involved in cation transport.

TL;DR: The results are interpreted as indicating that FC stimulates in roots the same energy-dependent proton secretion mechanism previously shown to be activated by FC in stem, coleoptiles, leaves, cotyledons and embryos from dormant seeds.

TL;DR: Isolation and culture procedures were adjusted to assure over 60% division in tobacco mesophyll protoplasts within 3 days of in vitro culture in liquid medium and it was found that thymidine incorporation peaked at 48 h of culture.

TL;DR: Proteinase inhibitors from plants were shown to inhibit the activity of exogenous proteinases produced by Fusarium solani, especially trypsin-like protease (BAPN Aase).

TL;DR: Yield and quality of the nucleic acids are shown by migration on gel electrophoresis or by gel filtration, and rRNAs from ribonuclease-rich tissues (Marchantia) are not degraded.

TL;DR: In this article, gas-liquid chromatography (GLC) was used to identify and quantify the following carbohydrates in soybean (Glycine max (L.) Merr.) nodules.

TL;DR: Differences in growth behaviour are discussed with respect to taxonomic relationship in the genus Petunia and growth requirements of the sexual hybrid between P. hybrida and P. parodii are compared to those of the parents.

TL;DR: The physiological significance of the two soybean nitrate reductases was discussed in terms of their kinetic properties and it was suggested that catalysis of the conversion of nitrate to nitrite is the rate limiting step during nitrate reduction by soybean NAD(P)H: nitrate Redux.

TL;DR: Fraction I proteins from various plant species representative of the major phyla of the plant kingdom and the subunit polypeptide compositions have been examined by isoelectric focusing in the presence of 8 M urea to indicate the hybrid origin of the plants from which the Fraction I protein was obtained.

TL;DR: Callus cultures of the perennial pasture legume, Stylosanthes hamata, can be readily induced to form shoots and roots and Sequential transfer from culture medium without growth regulators to one with kinetin led to regeneration of entire plantlets.

TL;DR: A qualitative correlation exists between K+ and Na+ uptake rate and the stimulating effect of these cations on proton extrusion, consistent with the hypothesis that IAA and FC activate the same proton/monovalent cation antiport mechanism endowed with a high affinity for K+.

TL;DR: The activity of phosphoenolpyruvate carboxylase in preparations obtained by lysis of spheroplasts of three species of blue-green algae was found to be 1.5- to 5-fold higher at 20°C than that of RuDP carboxyase, suggesting that these algae may have the ability to fix carbon dioxide by a C4 pathway.

TL;DR: These fatty acids were found to be present in plants and since they have chromatographic behaviours similar to inhibitor-s it might be that this complex contains them and they contribute to the properties of this inhibitor.

TL;DR: Photosynthetic characteristics which are intermediate between C 3 and C 4 plants show chlorophyll a / b ratios and levels of the decarboxylases, NADP + and NAD + malic enzyme and phosphoenolpyruvate (PEP) carboxykinase, which are similar to those found in C 3 plants.

TL;DR: Maximum levels of Sucrose phosphate synthetase activity are comparable in magnitude to levels of photosynthetic activity in mature grass leaves and with estimates of sucrose transport from the flag leaf into developing grass seeds.

TL;DR: Changes in cell constituents and enzyme activity were determined in senescing leaf segments of meadow fescue treated with the protein synthesis inhibitor 2-(4-methyl-2,6-dinitroanilino)-N-methylpropionamide (MDMP) to discuss the role of protein synthesis in foliar senescence.

TL;DR: The results are discussed to be due to a membrane diffusion potential associated with a K+-concentration gradient across the thylakoid membrane that is likely to be formed due to the passive efflux of K-ions occurring across theThylakoids membranes in conjunction with the electrogenic proton influx.

TL;DR: Cycloheximide (CHI) enhanced the peroxidase activity, both in dark-grown and FR-irradiated seedlings, however, the kinetics of enhancement of peroxIDase activity by continuous FR light and CHI is different.

TL;DR: Dimethyl-methylenedioxy-p-benzoquinone is found to be an excellent mediator for photoreductions by photosystem II only, i.e. in the presence of dibromothymoquinone (DBMIB) blocking reduction.

TL;DR: Concerning sorghum, the supplemental band gave evidence for an important enzyme activity and, according to the authors' examination, its formation was paralleled by the fading of the band found in etiolated material.

TL;DR: The envelope of intact chloroplasts readily fused with the protoplasts plasmalemma to establish continuity between the chloroplast stroma and the protoplast cytoplasm.

TL;DR: Callus was maintained on this medium supplemented with 30 μM NAA and 0.45 μM kinetin, and shoot differentiation of taro was differentiated from callus after 6 weeks of incubation at 27 ±2°C with 16 h of light alternating with 8 h darkness at 24 ± 2°C.

TL;DR: Golgi-rich fractions were prepared from onion stems and Calendula officinalis seedlings by the procedure described earlier and it has been shown that the enrichment of UDPG:sterol glucosyltransferase activity was 37–295-fold greater compared with the crude homogenates.

TL;DR: Growth stimulations were obtained in axenic cultures of Porphyra tenera Kjellm.

TL;DR: Both nuclear structure and DNA content indicate DNA (heterochromatin) underreplication to occur in certain cells of the suspensor in early embryogenesis.

TL;DR: Ammonia, methylamine and other uncouplers of photosynthetic phosphorylation promote in vivo the reversible conversion of the oxidized active form of Chlorella fusca nitrate reductase into its reduced inactive form.

TL;DR: In this paper, the authors show that after 12 days of NaCl treatment, mature leaves exhibit a 20-fold increase in PEP carboxylase activity and a significant accumulation of malate during the night, indicating that they behave like C 3 -plants.

TL;DR: The facts suggest the importance of the plasma membrane in the determination of the circadian clock and the spontaneous current pulses may have some circadian character also, but this is not so obvious as for the steady-state current.