Showing papers in "Journal of Plant Physiology in 1993"

TL;DR: The role of lipid and water soluble antioxidants in providing tolerance to chilling stress in tomato leaves was investigated using two species, Lycopersicon esculentum and L. hirsutum, which differed in their sensitivity to chilling.

TL;DR: The test independently showed that the ABA-levels were higher in VAM-colonized roots of maize than in non-infected controls, and the increased levels of ABA in colonized roots could have resulted from a better Pi-supply acquired by the fungi or more likely from colonization of the roots by the fungus.

TL;DR: It is suggested that the combined sucrose and trehalose contents of the leaves of M. flabellifolius are probably sufficient to account for membrane stabilization in the desiccated state, as explained by the water replacement hypothesis.

TL;DR: The ΨL at which proline levels start to increase dramatically and the end concentrations of proline accumulated, are advocated as criteria to be used in selecting for drought-tolerant tobacco genotypes as early as the F1- or F2-generations.

TL;DR: The results leed to the conclusion, that the enhanced internal Cytokinin levels are involved in the improved photosynthesis and growth of mycorrhizal flax.

TL;DR: Growth as well as embryogenesis and plant regeneration of in vitro cultured barley microspores could be manipulated independently through the nitrogen supply through the influence of the total nitrogen content, the NO 3 − :NH 4 + -ratio and the ratio of inorganic: organic nitrogen.

TL;DR: The enzymes which required energy from ATP appeared to be the ones more adversely affected, and all enzymes measured recovered some of their lost activity compared to controls as the cultures aged, consistent with initial large decreases in photosynthetic rates followed by some recovery.

TL;DR: The metabolism of 14C-sucrose was investigated in different regions of a growing potato (Solanum tuberosum) tuber attached to the mother plant, by injecting high-specific activity [U14C]-Sucrose into a fine channel bored in an otherwise intact tuber.

TL;DR: In this paper, the effect of in vivo Ni 2+ toxicity on the photosynthetic system of primary bean leaves ( Phaseolus vulgaris L. cv. Slowianka) was investigated.

TL;DR: Both the photorespiratory glycollate pathway and the urate oxidase-catalyzed biosynthesis of allantoin appear to be involved at the peroxisomal level in NaCl-tolerance of Pisum sativum L.

TL;DR: Results obtained suggest that the structural organization of xylem tissues, polyamine metabolism and peroxidase activity may have a role in the resistance of the cultivar Sultano to A. rabiei.

TL;DR: The maximum activities of PAL, CA4H and CA3H in callus cultures were similar to those of chili pepper fruits, but the values of CAOMT and CS were 6 times lower than those of fruits.

TL;DR: The results suggest that the induction of THT and the integration of cinnamoyltyramines into cell walls could be part of the primary response of potato tuber tissues to wounding.

TL;DR: Using willow plants raised from cuttings, electric excitability and signal transmission were investigated extra- and intracellularly and it was calculated that this lag is too short for moving a signalling substance to the leaves via the transpiration stream.

TL;DR: In this article, copper concentration increased in the shoot with increasing levels of the metal in the solution, decreasing net photosynthesis and photosynthetic capacity above the 0.01 mg/L Cu treatment.

TL;DR: It was concluded that in less pigmented cells the absorbed light could be more efficiently used for photosynthesis than in cells with excess pigment contents.

TL;DR: The thylakoid system was then fully reconstituted and capable of ensuring the energy requirements of a normal rate of CO2 assimilation as well as synthesis and accumulation of excess lipids in the translucent plastoglobuli.

TL;DR: It was found that UV-B provoked an increase in flavonoid content and even the synthesis of some new ones as observed by chromatography after 10 days of irradiation; however, SDS-PAGE showed thatUV-B promoted the increase of some soluble proteins and also interfered with some insoluble ones.

TL;DR: In this paper, the uptake and transport of zinc in zinc-sensitive and zinc-tolerant Silene vulgaris were compared in a short-term experiment, and the results of a split-root experiment clearly show that zinc has a direct inhibitory effect on root growth.

TL;DR: The activity of P5C reductase was enhanced while proline dehydrogenase and proline oxidase were inhibited to a great extent and the response of these enzymes to salt stress is discussed.

TL;DR: Application of Cr 6+, as K 2 Cr 2 O 7 , to pea seedlings severely depressed the overall capacity of plants to carry out photosynthesis, respiration and symbiotic nitrogen fixation, but upon extended exposure, nitrogen fixation was affected to the greatest extent followed by photosynthesis and then respiration.

TL;DR: The depletion of specific amino acids and certain buffer-soluble proteins from taproots during regrowth of defoliated alfalfa suggests that these N-pools may be utilized as a source of N during foliar regrowth after defoliation.

TL;DR: The results indicate that high concentrations of soluble amino compounds and specific proteins accumulate in taproots during autumn and early winter and decline markedly in spring coincident with the onset of herbage growth.

TL;DR: The fluorescence ratio F690/F735 proved to be a very suitable non-destructive diagnostic method to monitor the chlorophyll content during regreening of the poikilochlorophyllous leaves of X. scabrida upon rehydration.

TL;DR: The communication by phenylpropane-metabolites between symbiotic microorganisms and their legume host plants was further studied by the elucidation of root segment-specific exudation of aromatic compounds by studying the effects of various flavonoids on VA-mycorrhiza (VAM) development.

TL;DR: An embryogenic callus obtained from immature embryos of a Finnish winter wheat was used for in vitro -selection of hydroxyproline (Hyp) resistant calli and nine calli proved to be Hyp-resistant and remained viable and embryogenic.

TL;DR: Anthocyanin containing carrot cells, capable of growing in the presence of NaCl or sorbitol, were used to study the effect of salt and osmotic treatment during growth on the activity of the K+-stimulated (tonoplast) pyrophosphatase in microsomal fractions, suggesting that tonoplast pyroph phosphatase could play a role in the mechanism of salt tolerance.

TL;DR: It appears that senescent leaves possess a type of microbody that is involved in all three major peroxisomal functions: glyoxysomal, peroxISomal and purine catabolic.

TL;DR: It is demonstrated that studies on germination and dormancy of A. thaliana are hampered by the large variability of seed material and the relatively high rate of after-ripening.