Showing papers in "Plant Science in 2000"

TL;DR: In this article, the effect of simulated acid rain (AR) on H2O2 and malonyldialdehyde (MDA) levels and activities of peroxidase and catalase in bean plants were investigated.

TL;DR: Correlation coefficients between the different antioxidant parameters and metal dose level, or dry matter accumulation, were established, assessing for an induced-oxidative stress and comparing the sensitivity of the two cultivars.

TL;DR: Here, an attempt is made to enlist new interest in all facets of myo-inositol metabolism and its place in plant biology.

TL;DR: Results of this study indicate that growth characteristics were improved in transgenic wheat plants constitutively expressing the barley HVA1 gene in response to soil water deficit.

TL;DR: Novel findings in relation to the biotechnological manipulation of organic acids in transgenic models ranging from cell cultures to whole plants are discussed and may represent a way to understand fundamental aspects of plant physiology and lead to new strategies to obtain crop varieties better adapted to environmental and mineral stress.

TL;DR: Chilling stress activates the enzymes of an SOD/ascorbate-glutathione cycle under catalase deactivation in the leaves of cucumber, but the response timing of enzyme isoforms against various environmental stresses is not the same for all isoforms of antioxidant enzymes.

TL;DR: Fruit softening, pulp:peel ratio, reducing sugar content, invertase and respiration rate have been found to decrease in salicylic acid treated fruits as compared with control ones.

TL;DR: The results suggest that the phytotoxic effects of Hg in tomato seedlings may be achieved by an enhanced production of active oxygen species (AOS) and subsequent lipid peroxidation.

TL;DR: This is the first report on the endophytic fungus from A. annua and the bioactive metabolites thereof, shown to be fungistatic to the crop pathogenic fungi Gaeumannomyces graminis var, tritici, Rhizoctonia cerealis, Helminthosporium sativum and Phytophthora capisici.

TL;DR: Results showed that inducibility of catalase and guaiacol peroxidase was highly significant since the highest CuSO 4 concentrations were responsible for 240–280% increases in their activity, and suggested that induction of these various enzymes is part of a general defense strategy to cope with overproduction of reactive oxygen species.

TL;DR: Microsatellite markers are likely to have many applications in sugarcane genetics and breeding including germplasm analysis, cultivar identification, parent evaluation and marker assisted breeding.

TL;DR: An Agrobacterium tumefaciens-mediated transformation system was developed for Artemisia annua L. annua and it was demonstrated that about 8 approximately 10 mg/g DW of artemisinin were then detected in transgenic plants regenerated from five shoot lines, this is about 2-3 times higher than that in the control.

TL;DR: The characterization of the Arabidopsis ltp gene family will permit to initiate a genetic approach for determining the in vivo function(s) of these proteins.

TL;DR: Using isoelectric focusing to separate POD, it was found that excess Fe(2+), Cu (2+) or Zn(2+) induced both quantitative and qualitative metal-specific changes in POD isozyme pattern in detached rice leaves.

TL;DR: The cotyledon regeneration system proved to be an excellent vehicle for the production of a large number of independently transformed peanut plants and provides new opportunities for the crop improvement of peanut via genetic transformation.

TL;DR: It is shown that puroindoline genes are present in diploid and hexaploid Triticum species but absent in tetraploid species, and that T. tauschii is likely to be the donor of the T. aestivum puroINDoline genes.

TL;DR: The physiological response and tolerance of four fresh-market, cultivated tomatoes to water stress and salinity was determined and under salinity, ion accumulation, osmotic potential and dry matter production were highly correlated.

TL;DR: Modifications of PSII photochemistry under the steady state of photosynthesis may be a mechanism to downregulate photosynthetic electron transport so that production of ATP and NADPH would be in equilibrium with the decreased demand in the Calvin cycle in nitrogen-deficient plants.

TL;DR: There is strong correlative evidence for a link between sucrose metabolism and the level of expression of key genes, but that a number of different mechanisms may be involved.

TL;DR: In Arabidopsis, ROS increases are associated with the developmental transition to flowering, perhaps due to programmed declines in APX activity, and apparently lead to the oxidative activation of lipoxygenase and subsequent lipid peroxidation.

TL;DR: The promoter activity of a member of the apple Ypr10 gene family and the inducibility of its gene product Mal d 1 are reported andApplication of abiotic stimuli, like salicylic acid and reduced glutathione significantly increased both, YPR10*a-GUS activity in transgenic tobacco and transcriptional and translational expression of Mald 1 in young apple leaves.

TL;DR: The C. fistula PI inhibits trypsin (IC(50) 2 µM), and is the first known example of a plant defensin with protease inhibitory activity, suggesting a possible additional function for some members of this class of plant defensive proteins.

TL;DR: Compared to negative controls, tobacco plants expressing the D4E1 gene showed greater levels of disease resistance in planta to the fungal pathogen, Colletotrichum destructivum, which causes anthracnose.

TL;DR: The combination of novel regulatory systems for targeted expression and useful new genes should pave the way for improvement of rice and other cereals.

TL;DR: The results indicate the presence of at least two types of allylphenol-specific O-methyltransferase activities in sweet basil chemotypes, one highly specific for chavicol; and a different one that can accept eugenol as a substrate.

TL;DR: In this paper, the effects of copper treatment on nitrogen metabolism in a closed system were analyzed in a Sauvignon grapevines, which were cultured in agar and exposed to copper levels ranging from 0.07 (control) to 5 µg Cu g(-1) medium.

TL;DR: An efficient method has been developed for regeneration of complete plants via somatic embryogenesis in Corydalis yanhusuo (Fumariaceae), an important medicinal plant, using tuber-derived callus using somatic embryos to establish somatic embryo-derived plants.

TL;DR: The results suggest a reciprocal pattern of induction between GS and GDH during tomato fruit ripening, which is principally present in green fruit extracts, but was almost exclusively observed in the extracts of red fruits.

TL;DR: The results demonstrate the potential usefulness of the two rice polyubiquitin promoters in rice or other monocot transformation systems.

TL;DR: A substantial reduction in the irrigation water supplied combined with a high frequency of application promoted plant hardening; the plants enduring drought better, due to their greater osmotic adjustment, which prevented severe plant dehydration and leaf abscission.