Showing papers in "Plant Science in 1997"

TL;DR: An efficient and reproducible Agrobacterium -mediated transient gene expression system for intact leaf tissue was developed and similar results were obtained with other plant species, such as Phaseolus acutifolius, poplar, and tobacco.

TL;DR: The results suggest that some antioxidant enzymes can be activated, notably in upper plant parts, in response to oxidative stress induced by Cd and Zn.

TL;DR: Cell wall polysaccharides contain a small amount of ester-linked hydroxycinnamic acid derivatives, such as p-coumaric and ferulic acids, which can be coupled oxidatively to form the acid dimers.

TL;DR: It is indicated that a toxic concentration of copper (50 μM) induces oxidative stress and differential responses of antioxidant enzymes in plant parts and that GPX activity increased in response to damage.

TL;DR: The conclusion is that oxidative damage is not the prime cause of the low regenerability of tulip bulb scale explants and appears not to be related with the differences in tissue culture performance.

TL;DR: It was demonstrated that shoot arising from cotyledon explants rooted more efficiently than shoots arising from leaf disc explants, and it could be concluded that the influence of timentin on tissue culture was negligible or positive as compared to those of cefotaxime or carbenicillin.

TL;DR: In this article, the role of abscisic acid (ABA) in the regulation of polyamine biosynthesis in rice seedlings exposed to chilling (5°C) was investigated.

TL;DR: Evaluated the consequences of Cd stress on soluble carbohydrates, free amino acids, proteins, CO2 fixation, stomatal conductance, intercellular CO2 and water potential of white lupin in vitro cultures found raffinose, mannose and hydroxyproline levels increased with Cd concentration.

TL;DR: A sensitivity of the photosynthetic apparatus in young Cd-treated plants is discussed with regard to the metal action causing free fatty acids or feedback inhibition of electron flow, while in older plants in regard to changes resembling plant senescence.

TL;DR: The results suggest that synergism and additivity of Cd–Zn interactions might be related to an inadequate compartmentation of cadmium and zinc burdens in the sensitive sites, where they would be relatively `excluded' in the case of individual stress regime.

TL;DR: Since antifungal agents such as taxol and leucinostatin A are produced by some endophytic fungi, oomycetes such as P. ultimum may serve as initial screening tools for anticancer agents.

TL;DR: Maltose was superior to sucrose in terms of the number of mature somatic embryos formed as well as their germination percentage, and the promotive effect of PEG-4000 was mainly exerted during the formation precotyledonary embryos.

TL;DR: An in vitro grown interspecific Prunus rootstock, Fereley-Jaspi (R), which had been infected by chip budding with the Plum Pox Potyvirus Marcus strain, was used as experimental material and the impact of cryopreservation on producing virus-free plantlets was studied.

TL;DR: Since Cl − accumulation in tissues was higher in Troyer citrange than in Cleopatra mandarin, a relationship between the ability to absorb Cl − and the inhibition of NO 3 − uptake is suggested for these plants.

TL;DR: Temperature effect on growth and anthocyanin production in the cultured strawberry, Fragaria ananassa cv Shikinari, was investigated at a temperature range of 15–35°C, however, the lower temperature induced an increased level of anthocianin content within the examined temperatures.

TL;DR: The results indicate that the SAUR 15A promoter is composed of multiple auxin response elements that behave differently than those previously characterized in the soybean GH3 promoter.

TL;DR: There were large decreases in the photosynthetic rates of both cultivars from summer to winter, with more pronounced declines shown by Catuai, but the photochemical efficiency of photosystem II decreased to a greater extent inCatuai than in Kouillou during winter.

TL;DR: Propagules of Dendrocalamus giganteus were produced by a process of in vitro axillary shoot proliferation followed by rooting, and the presence of culture contaminants in single-node segments of secondary branches were strongly influenced by the seasonal rainfall pattern.

TL;DR: The results suggest that polyamines are related to growth of rice roots cultured in vitro and the relationships between putrescine and chilling tolerance is discussed.

TL;DR: The presence of osmoticum greatly reduced the phenomenon of secondary embryogenesis and improved the conversion of proembryonic masses into torpedo-shaped embryos, while the addition of exogenous ABA favoured only the formation of globular-stage embryos.

TL;DR: The results suggest that GSra was a constitutive enzyme and GSrb was an enzyme induced by external N.

TL;DR: Inoculation of maize roots with the mycorrhizal fungus Glomus intraradices resulted in an increase of indole-3-butyric acid (IBA) during early stages of infection compared to control roots, which was confirmed in the variety ‘Alize’.

TL;DR: The behaviour of the physiological parameters investigated, together with the data relative to chlorophyll fluorescence measurements, highlighted the fact that the depression in photosynthetic activity was caused by different concomitant factors in Verticillium-infected plants and was due mainly to drought stress in plants inoculated with Fusarium.

TL;DR: The influence of lime-induced iron deficiency on some features of the thylakoids from peach trees grown in calcareous soils was studied and the level of total chlorophyll and soluble proteins showed a progressive decrease upon increase in iron deficient condition.

TL;DR: In this article, a gene coding for a membrane intrinsic protein (MIP) was detected during plant-fungal interactions in parsley roots using RACE of an RT-PCR fragment amplified from parsley arbuscular mycorrhiza poly(A)+ RNA.

TL;DR: Local cooling of the stem or freezing a section of it with liquid nitrogen, as well as treatment with sodium azide, inhibited the stimulation of respiration, which seems to be a consequence of inhibition and damping of the amplitude of the electric wave reaching the leaves.

TL;DR: The relationship between the four parameters is an evidence that both FTCs and FICs can be used for evaluation of changes in thylakoid membrane caused by high temperature stress.

TL;DR: It is concluded that ABA had a protective effect on membranes against osmotic stress, as attested by electrolyte leakage test and polar lipid analysis.

TL;DR: Trypsin inhibitors were purified from the storage roots of sweet potato with ammonium sulfate precipitation, Sephadex G-75 gel filtration chromatography, and trypsin-Sepharose 4B affinity chromatography and found intermolecular thiol-disulfide interchanges of TIs were found during DHA reduction.