Showing papers in "Annals of Botany in 2006"

TL;DR: New discoveries of the development and functioning of root clusters in both monocotyledonous and dicotylingonous families are essential to produce new crops with superior P-acquisition traits.

TL;DR: CK and IAA are key hormones that regulate root development, its vascular differentiation and root gravitropism; these two hormones, together with ethylene, regulate lateral root initiation.

TL;DR: Evidence is presented obtained from microarray expression studies in Arabidopsis that the Hsf gene network is highly flexible and specialized, with specific members and/or member combinations controlling the response of plants to particular stress conditions.

TL;DR: The chemical identification of strigolactones as a host-recognition signal for arbuscular mycorrhizal (AM) fungi is discussed in this article, and their role in the establishment and propagation of parasitic weeds is discussed.

TL;DR: It is speculated on the possibility that the effects elicited by external L-glutamate represent a novel form of foraging response that could potentially enhance a plant's ability to compete with its neighbours and micro-organisms for localized sources of organic nitrogen.

TL;DR: The research indicated that failure of tomato fruit set under a moderately increased temperature above optimal is due to the disruption of sugar metabolism and proline translocation during the narrow window of male reproductive development.

TL;DR: It is demonstrated that investigations of other plant species will still be necessary to address specific questions of regulation of sulfur nutrition, as the role of Arabidopsis as a model plant will be further strengthened.

TL;DR: This botanical briefing examines how molecular systematics has contributed to progress inUnderstanding the history of Tertiary relict genera, i.e. those that that now occur disjunctly in parts of Eurasia and N America, and how progress in understanding Southern Hemisphere biogeography paradoxically makes unravelling Northern HemisphereBiogeography more complex.

TL;DR: It is concluded that alpha-pinene inhibits early root growth and causes oxidative damage in root tissue through enhanced generation of ROS, as indicated by increased lipid peroxidation, disruption of membrane integrity and elevated antioxidant enzyme levels.

TL;DR: Rhizosphere distances, characteristic times for solute diffusion, and rates of root and organism growth must be considered to understand rhizosphere development.

TL;DR: This study introduces a new methodology for crop parameter optimization against measured data called multi-fitting, validates the calibrated model for maize with independent field data, and describes a technique for 3D visualization of outputs.

TL;DR: Summer dormancy has been correlated with superior survival after severe and repeated summer drought in a large range of perennial grasses and could be used in the development of cultivars that are able to meet agronomic and environmental goals.

TL;DR: This review explains cactus shoot structure, discusses relationships between structure, ecology, development and evolution, and indicates areas where research on cacti is necessary to test general theories of morphogenesis.

TL;DR: Understanding gene regulation may help to understand cell death in floral organs better, but alone it cannot provide all the answers.

TL;DR: Moderate heat response involves proteins related to lipid biogenesis, cytoskeleton structure, sulfate assimilation, thiamine and hydrophobic amino acid biosynthesis, and nuclear transport in P. euphratica upon moderate heat exposure.

TL;DR: The rise of PvPIP2;1 gene expression and PIP1 protein abundance in the leaves of P. vulgaris plants subjected to drought was correlated with a decline in the transpiration rate, and the increase in the expression of the three PIP genes examined caused by drought and the decline of PIP2 protein abundance were not correlated with any of the parameters measured.

TL;DR: In this paper, the authors evaluated whether white lupin grown under P-stress has adaptations in nodulation and N2 fixation that facilitate continued functioning, and showed that higher CO2 fixation was correlated with increased transcript abundance and enzyme activities of phosphoenolpyruvate carboxylase and malate dehydrogenase in nodules.

TL;DR: It is suggested that cessation of tillering is induced when the fraction of light intercepted by the canopy exceeds a specific threshold and red : far-red ratio drops below 0.40.

TL;DR: Recent changes in farming practices and cultivation methods along with less weed management may have promoted the re-emergence and divergence of weedy rice in North-eastern China.

TL;DR: The degree of differentiation between oleasters and cultivated trees on the islands suggests that all cultivars have been introduced into these regions from the outside, while the Umbrian cultivar has originated either by selection from local oleaster or by direct introduction from other regions.

TL;DR: Heating and cooling can influence cambial activity and cell differentiation in Norway spruce, however, at the ultrastructural and topochemical levels, no changes were observed in the pattern of secondary cell-wall formation and lignification or in lignin structure, respectively.

TL;DR: In Arabidopsis there is a narrow developmental window for LR initiation, and no specific cell-count or distance-measuring mechanisms have been found that determine the site of successive initiation events, but the branching density and lateral organ density are accession-specific and based on the latter density the average distance between successive LRs can be predicted.

TL;DR: In this article, the effects of endogenously accumulated Glycine Betaine (GB), a quaternary ammonium compound, in rice were evaluated and discussed, and it was concluded that CMO-expressing rice plants were not effective for accumulation of GB and improvement of productivity.

TL;DR: Results cannot be extrapolated with certainty to the much more gradual increases of P(CO2) in waterlogged soils, particularly when there is ventilation via a well-developed gas-space continuum from the roots to the atmosphere.

TL;DR: The results suggest that 14-3-3 proteins may be involved in the salt stress and potassium and iron deficiency signalling pathways in young tomato roots, and gene-specific expression patterns indicate that isoform-specificity may exist in the 14- 3-3 gene family of tomato roots.

TL;DR: Each lysis buffer tested responded to a specific problem differently and none of the buffers worked best with all species, so selection of the most appropriate buffer depending on species, tissue type and the presence of cytosolic compounds interfering with DNA staining is facilitated.

TL;DR: The results show that the sectional classification in current use needs major revision, with many old sections being merged into larger ones and most recent groups in the eastern Mediterranean clade are not resolved and reticulation in the western Mediterranean group of sections makes phylogenetic relationships within these two groups somewhat obscure.

TL;DR: The results from this study add to a growing body of literature highlighting that floral visitors vary in pollination effectiveness, and that visitors carrying the most pollen on their bodies may not always be the most efficient at depositing pollen on stigmas.

TL;DR: The wide diversity of seasonal flowering and fruiting with linkages to leaf flush time and leafless period reflect the fact that variable reproductive and survival strategies evolved in tree species under a monsoonic bioclimate.

TL;DR: This review summarizes current efforts and progress in plant nutriomic research in China with examples from several case studies and points out potential obstacles and depicts future perspectives in this emerging frontier of plant nutrition.