Showing papers in "Annals of Botany in 2000"

TL;DR: The general paradigm, called the GP, herein, relates respiration to any number of individual processes that it supports, and is more realistic, complete and mechanistic than other approaches to describing or modelling respiration.

TL;DR: New discoveries of the physiological properties of brassinosteroids allow us to consider them as highly promising, environmentally-friendly, natural substances suitable for wide application in plant protection and yield promotion in agriculture.

TL;DR: The effectiveness of toughness in preventing herbivory is indisputable, but largely indirect due to confusion over a false equivalence between nutritional ‘fibre content’ and toughness.

TL;DR: This paper lists DNA C-values for 807 angiosperm species from 70 original sources, including 520 from sources published after 1996, and 691 for species not included in any of the previous five lists.

TL;DR: The principles underlying the development of a more mechanistic approach to modelling plant respiration are reviewed, with the main conclusions that models should separate C substrate from structure so that direct or indirect C substrate dependence of the components of respiration can be represented.

TL;DR: The sub-apical decline in ROL appeared to coincide with the appearance of aerenchyma in the cortex but thin walled ‘passage areas’ (windows) in the hypodermal/epidermal cylinder persisted locally and remained leaky to oxygen to some degree.

TL;DR: Cluster root formation in white lupin is induced mainly by phosphorus (P) starvation, and seems to be regulated by the endogenous P status of the plant, and inhibitory effects of kinetin application suggest the involvement of endogenous phytohormones (auxins and cytokinins), which may act in an antagonistic manner in the P-starvation response.

TL;DR: Atriplex griffithii accumulated a large quantity of ions, with the ash content reaching 39% of the dry weight in leaves, which is significant in osmotic adjustment and facilitates water uptake along a soil-plant gradient.

TL;DR: The growth-maintenance approach to respiration, extended to represent many of the component processes, has considerable merit, but there are still parameters that require adjustment so that the predictions of the model are acceptable.

TL;DR: Results from the metabolic engineering experiments emphasize the need for a greater understanding of primary metabolic pathways from which osmoprotectant synthesis pathways branch, and the identification and exploitation of diverse osmobrotectants in naturally stress-tolerant organisms.

TL;DR: The study of the development of male and female flowers of different species shows that there is no common underlying mechanism and that sex determination systems leading to dioecy have originated independently many times in evolution.

TL;DR: A single adaptive explanation based on frequency-dependent male mating proficiency can explain the evolution and maintenance of the four stylar polymorphisms in plants.

TL;DR: Increased expression of a number of genes in response to drought stress have been noted and some genes related to LEA (Late Embryogenic Abundant) proteins have been isolated which suggests they may play a role in maintaining tissue integrity during desiccation.

TL;DR: The results suggest that auxin transport from the shoot plays a role in the formation of proteoid roots during P deficiency, and that phosphonate applied to P-sufficient white lupin elicits the full suite of coordinated responses to P deficiency.

TL;DR: Understorey vegetation in patches of Retama sphaerocarpa shrubs in semi-arid environments is dependent on the overstorey shrub life history and the eAect of the canopy on understorey species diversity in the field and its relationships with the soil seed bank is investigated, suggesting that the soil Seed Bank is rather uniform and that the shrub canopy strongly selects which species appear in theunderstorey.

TL;DR: The osmotic potentials of the soils where the four halophytes occur naturally were more negative than those allowing seeds to germinate after osmosis stress, which promoted an increase in the rate of recovery germination which, in Arthrocnemum macrostachyum and Sarcocornia fruticosa, doubled their rates of germination compared to distilled water controls.

TL;DR: The in vitro bioassay germination test, using a Fusarium isolate from the protocorm of Cypripedium reginae, was compared with standard chemical procedures of triphenyl tetrazolium chloride (TTC) and acid fuchsin for testing seed viability.

TL;DR: The physico-chemical properties of iron oxyhydroxide plaques formed on the roots of Phragmites australis under field and laboratory conditions were determined using electron microscopy and energy dispersive spectrometry (EDS) analysis.

TL;DR: Water deficits caused leaf senescence in M. x giganteus and M. sacchariflorus under water deficit, indicating stomatal regulation, and differences in dry matter partitioning to the shoot resulted in genotypic differences in WUE, calculated on a harvestable dry matter basis.

TL;DR: Native populations of Origanum vulgare L. from the Liguria and Emilia regions of northern Italy were analysed for essential oil content and composition, and the presence of some particular morphological characters suggest that the taxonomy of O. Vulgare, especially in its western distribution area, needs further investigation.

TL;DR: The use of transgenic plants and model systems such as Arabidopsis is assisting the understanding of the mechanisms that regulate abscission and dehiscence and the application of this information will advance understanding of cell separation processes in general.

TL;DR: Laticifer differentiation of Hevea brasiliensis was investigated by application of lanolin containing jasmonic acid or other chemicals to the surface of young stems in epicormic shoots and the secondary laticifers were induced by the application of linolenic acid, a precursor of JA biosynthesis.

TL;DR: When a variety of vegetable crop plants were screened for UV-tolerance, it was found that the levels of chlorophyll and UV-absorbing compounds did not correlate with sensitivity, but biomass accumulation was correlated with UV-sensitivity; plants that accumulated more biomass over a 2-week period were more likely to be UV-B sensitive.

TL;DR: The current results show that simultaneous processing of nuclear samples from the target and the standard species is necessary to obtain reliable DNA estimates and a test for the presence of inhibitors should be conducted, and when inhibitors are present caution should be taken in interpreting differences in estimated DNA content.

TL;DR: The high sensitivity of small radicles of this species to salinity indicated that salt must be removed from the soil surface for seedling establishment.

TL;DR: The siphonous plant body plan may have been evolutionarily derived from a unicellular or multicellular ancestral life form, and each of the plant body plans is reviewed in terms of its biomechanical advantages and disadvantages.

TL;DR: Harvest index stability was highest in soybean, intermediate in sunflower and lowest in maize, and differential stability of reproductive partitioning partially derived from contrasting patterns of meristem allocation.

TL;DR: In the Pimpinellifoliae, DNA amounts of tetraploids were disproportionately larger than those of diploids which suggests that they originated as hybrids with species of sections with larger DNA amounts.

TL;DR: This study evaluates relationships between vegetation and stable isotope distribution within a large, northern peat-accumulating wetland for two systems characterized by different plant assemblages and hydrologic regimes: a Carex -dominated fen and a Sphagnum -dominated, forested bog crest.

TL;DR: The fact that the reproductive phase from TS/TM to H was largely independent of the duration of the previous phase provides evidence that this phase might be genetically manipulated to increase the time for floret development and hence grain number.