Showing papers in "Annals of Botany in 2002"

TL;DR: Differences among species that can be traced to different capacities for water acquisition, rather than to differences in metabolism at a given water status, are described.

TL;DR: The analysis suggests that stomatal closure is the earliest response to drought and the dominant limitation to photosynthesis at mild to moderate drought, however, in parallel, progressive down-regulation or inhibition of metabolic processes leads to decreased RuBP content, which becomes the dominant limit at severe drought, and thereby inhibits photosynthetic CO2 assimilation.

TL;DR: Physiological traits that contribute to improved productivity under mild-moderate drought, including broad avoidance/tolerance to mild- moderate stresses is given by constitutive traits also expressed under stress-free conditions are focused on.

TL;DR: This issue specifically sets out to place molecular and physiological processes and their agronomic applications in an environmental context, and considers the consideration of water deficits.

TL;DR: A study with six Mediterranean shrubs revealed that, in spite of some marked interspecific differences, all followed the same pattern of dependence of photosynthetic processes on stomatal conductance, and this pattern was quite similar to that of grapevines.

TL;DR: Decreasing relative water content of leaves progressively decreases stomatal conductance (gs), slowing CO2 assimilation (A) which eventually stops, after which CO2 is evolved.

TL;DR: It does seem very unlikely that photosynthesis per se and, by implication, factors that directly influence photosynthesis will be as important as those factors which influence the capacity of the tree to use the products of photosynthesis, such as temperature.

TL;DR: The study of root aquaporins provides an interesting model to understand the regulation of water transport in plants and sheds light on the basic mechanisms of water uptake by roots.

TL;DR: This Botanical Briefing focuses on interactions between ISR and induced resistance against herbivores that is mediated by jasmonic acid as a central signalling molecule and proposes a framework that explains many of the thus far contradictory results.

TL;DR: The interactions between oxidants, antioxidants and redox changes leading to modified gene expression, particularly in relation to drought, are discussed, and the potential significance of photorespiratory H2O2 in signalling and acclimation is called attention.

TL;DR: Here it is demonstrated that this approach to substitute W1 and W2 with sample means yields a biased estimate of RGR whenever the variance of the natural logarithm-transformed plant weight changes through time.

TL;DR: It was found that positive interactions among plants play an important role in the structuring and functioning of a swamp forest, a coastal sandy vegetation and a cold, high altitude vegetation in the state of Rio de Janeiro.

TL;DR: An all-inclusive software tool for dealing with the essential core of mathematical and statistical calculations in plant growth analysis according to a purely 'classical' approach across one harvest-interval is presented.

TL;DR: In tobacco plants, 'total Rubisco activity', i.e. the activity following pre-incubation with CO2 and Mg2+, was positively correlated with leaf relative water content but in extracts from leaves with low water potential increased markedly when tightly bound inhibitors were removed, thus increasing the number of catalytic sites available.

TL;DR: Although QTL analysis is still time-consuming and resource-demanding, its integration with genomics and post-genomics approaches (e.g. transcriptome, proteome and metabolome analyses) will play an increasingly important role for the identification and validation of candidate genes affecting MPTs and GY.

TL;DR: It is argued that Populus is rapidly becoming accepted as the 'model' woody plant and that such a ' model' tree is necessary to complement the genetic resource being developed in arabidopsis.

TL;DR: It is suggested that a major effect of heat stress on pollen development is a decrease in starch concentration 3 d before anthesis, which results in a decreased sugar concentration in the mature pollen grains, which possibly contribute to the decreased pollen viability in tomato.

TL;DR: It is shown that photosystem II (PSII) functioning and its regulation are not qualitatively changed during desiccation and that the variations in PSII photochemistry can simply be understood by changes in substrate availability in this condition.

TL;DR: It is concluded that the tight closure of the locules by the cell layers delayed locule opening, and decreased fertility at high temperatures.

TL;DR: Potential functions of approx.

TL;DR: Recent progress and future prospects of comparative genomics in grasses are presented and a number of exceptions to microcolinearity are revealed, which have given insight into mechanisms that are involved in grass-genome evolution.

TL;DR: The results suggest that the cell number and cell division activity in rice endosperms are regulated by cytokinin levels in the endosperm and that root-derived Z + ZR play a pivotal role.

TL;DR: The problems surrounding characterization and assignation of function to plant GLRs are discussed, and potential roles for GLR proteins as non-selective cation channels involved in metabolic signalling are described.

TL;DR: Amplified fragment length polymorphism (AFLP) and inter-simple sequence repeat markers were employed to characterize a genetic resource collection of Miscanthus, a grass under trial in Europe as a biomass crop.

TL;DR: Under drought conditions in the presence of strong light, wild watermelon accumulates high concentrations of citrulline, glutamate and arginine in its leaves, which may be related to the induction of DRIP-1, a homologue of ArgE in Escherichia coli, where it functions to incorporate the carbon skeleton of glutamate into the urea cycle.

TL;DR: The results show that chickpea genotypes tolerant of salt-affected soil have better nodulation and support higher rates of symbiotic nitrogen fixation than sensitive genotypes.

TL;DR: It is suggested that where high temperature and drought occur concurrently after anthesis there may be a degree of drought escape associated with chronic high temperature due to the reduction in the duration of kernel filling, even though the rate of water use may be enhanced by high temperature.

TL;DR: It is concluded that N(2)-fixation did not limit the growth of clover plants experiencing P deficiency, indicating a regulatory inhibition of nodule activity following morphological and growth adjustments.

TL;DR: The growing zone of maize seedling primary roots accumulates proline at low water potential and the endosperm is the source of the proline that accumulates in the root tips of intact seedlings.

TL;DR: It is now apparent that AHLs are used for regulating diverse behaviours in epiphytic, rhizosphere-inhabiting and plant pathogenic bacteria and that plants may produce their own metabolites that interfere with this signalling.