Abstract:
BACKGROUND AND AIMS:Experimental drought is well documented to induce a decline in photosynthetic capacity. However, if given time to acclimate to low water availability, the photosynthetic responses of plants to low soil moisture content may differ from those found in short-term experiments. This study aims to test whether plants acclimate to long-term water stress by modifying the functional relationships between photosynthetic traits and water stress, and whether species of contrasting habitat differ in their degree of acclimation. METHODS:Three Eucalyptus taxa from xeric and riparian habitats were compared with regard to their gas exchange responses under short- and long-term drought. Photosynthetic parameters were measured after 2 and 4 months of watering treatments, namely field capacity or partial drought. At 4 months, all plants were watered to field capacity, then watering was stopped. Further measurements were made during the subsequent 'drying-down', continuing until stomata were closed. KEY RESULTS:Two months of partial drought consistently reduced assimilation rate, stomatal sensitivity parameters (g1), apparent maximum Rubisco activity (V'(cmax)) and maximum electron transport rate (J'(max)). Eucalyptus occidentalis from the xeric habitat showed the smallest decline in V'(cmax) and J'(max); however, after 4 months, V'(cmax) and J'(max) had recovered. Species differed in their degree of V'(cmax) acclimation. Eucalyptus occidentalis showed significant acclimation of the pre-dawn leaf water potential at which the V'(cmax) and 'true' V(cmax) (accounting for mesophyll conductance) declined most steeply during drying-down. CONCLUSIONS:The findings indicate carbon loss under prolonged drought could be over-estimated without accounting for acclimation. In particular, (1) species from contrasting habitats differed in the magnitude of V'(cmax) reduction in short-term drought; (2) long-term drought allowed the possibility of acclimation, such that V'(cmax) reduction was mitigated; (3) xeric species showed a greater degree of V'(cmax) acclimation; and (4) photosynthetic acclimation involves hydraulic adjustments to reduce water loss while maintaining photosynthesis.
journal_name
Ann Botjournal_title
Annals of botanyauthors
Zhou SX,Medlyn BE,Prentice ICdoi
10.1093/aob/mcv161subject
Has Abstractpub_date
2016-01-01 00:00:00pages
133-44issue
1eissn
0305-7364issn
1095-8290pii
mcv161journal_volume
117pub_type
杂志文章相关文献
ANNALS OF BOTANY文献大全abstract:Background and Aims:Bird pollination is rare among species in the genus Utricularia, and has evolved independently in two lineages of this genus. In Western Australia, the Western Spinebill, Acanthorhynchus superciliosus, visits flowers of Utricularia menziesii (section Pleiochasia: subgenus Polypompholyx). This study ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcy163
更新日期:2019-01-01 00:00:00
abstract:BACKGROUND AND AIMS:There are a number of disparate models predicting variation in plant chemical defences between species, and within a single species over space and time. These can give conflicting predictions. Here we review a number of these theories, before assessing their power to predict the spatial-temporal var...
journal_title:Annals of botany
pub_type: 杂志文章,评审
doi:10.1093/aob/mcz151
更新日期:2020-04-25 00:00:00
abstract:BACKGROUND AND AIMS:The water gap is an important morphoanatomical structure in seeds with physical dormancy (PY). It is an environmental signal detector for dormancy break and the route of water into the non-dormant seed. The Convolvulaceae, which consists of subfamilies Convolvuloideae (11 tribes) and Humbertoideae (...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcn217
更新日期:2009-01-01 00:00:00
abstract:BACKGROUND AND AIMS:The gene flow through pollen or seeds governs the extent of spatial genetic structure in plant populations. Another factor that can contribute to this pattern is clonal growth. The perennial species Arabidopsis lyrata ssp. petraea (Brassicaceae) is a self-incompatible, clonal species found in disjun...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcq102
更新日期:2010-08-01 00:00:00
abstract:BACKGROUND AND AIMS:Reciprocal herkogamy, including enantiostyly and heterostyly, involves reciprocity in the relative positions of the sexual elements within the flower. Such systems result in morphologically and, since pollen is deposited on and captured from different parts of the pollinator, functionally distinct f...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mct188
更新日期:2013-10-01 00:00:00
abstract:BACKGROUND AND AIMS:Kaolin applied as a suspension to plant canopies forms a film on leaves that increases reflection and reduces absorption of light. Photosynthesis of individual leaves is decreased while the photosynthesis of the whole canopy remains unaffected or even increases. This may result from a better distrib...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcl252
更新日期:2007-02-01 00:00:00
abstract:BACKGROUND:S-RNase-based self-incompatibility (SI) occurs in the Solanaceae, Rosaceae and Plantaginaceae. In all three families, compatibility is controlled by a polymorphic S-locus encoding at least two genes. S-RNases determine the specificity of pollen rejection in the pistil, and S-locus F-box proteins fulfill this...
journal_title:Annals of botany
pub_type: 杂志文章,评审
doi:10.1093/aob/mcr179
更新日期:2011-09-01 00:00:00
abstract:BACKGROUND AND AIMS:Arbuscular mycorrhizal symbioses are important for nutrient acquisition in >80 % of terrestrial plants. Recently there have been major breakthroughs in understanding the signals that regulate colonization by the fungus, but the roles of the known plant hormones are still emerging. Here our understan...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mct041
更新日期:2013-05-01 00:00:00
abstract:BACKGROUND AND AIMS:Species of the Nepenthaceae family are under-represented in studies of leaf traits and the consequent view of mineral nutrition and limitation in carnivorous plants. This study is aimed to complement existing data on leaf traits of carnivorous plants. METHODS:Physico-chemical properties, including ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcm023
更新日期:2007-05-01 00:00:00
abstract:BACKGROUND AND AIMS:Global climate models predict decreases in leaf stomatal conductance and transpiration due to increases in atmospheric CO2. The consequences of these reductions are increases in soil moisture availability and continental scale run-off at decadal time-scales. Thus, a theory explaining the differentia...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcp292
更新日期:2010-03-01 00:00:00
abstract:BACKGROUND AND AIMS:The broomrapes, Orobanche sensu lato (Orobanchaceae), are common root parasites found across Eurasia, Africa and the Americas. All species native to the western hemisphere, recognized as Orobanche sections Gymnocaulis and Nothaphyllon, form a clade that has a centre of diversity in western North Ame...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcw158
更新日期:2016-11-01 00:00:00
abstract:BACKGROUND AND AIMS:Organisms occupying the edges of natural geographical ranges usually survive at the extreme limits of their innate physiological tolerances. Extreme and prolonged fluctuations in environmental conditions, often associated with climate change and exacerbated at species' geographical range edges, are ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcv162
更新日期:2016-02-01 00:00:00
abstract:BACKGROUND AND AIMS:Although it was generally assumed that Maxillaria spp. do not produce nectar, in recent years, nectar has been reported for a number of these orchids. Nevertheless, our current understanding of nectary structure and nectar secretion in Maxillaria is based solely on M. coccinea (Jacq.) L.O. Williams ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mci182
更新日期:2005-08-01 00:00:00
abstract:BACKGROUND AND AIMS:Several biogeographic models have been proposed to explain the colonization and diversification patterns of Macaronesian lineages. In this study, we calculated the diversification rates and explored what model better explains the current distribution of the 15 endemic species to the Canary Islands b...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcaa090
更新日期:2020-05-09 00:00:00
abstract:BACKGROUND AND AIMS:In some dicotyledonous leaves and leaflets, the secondary veins run more-or-less straight to the margins and have well-defined lengths. For a given half-lamina of length L, an equation, previously proposed, relates the lengths of these veins, p, to the distances, l, between the leaf tip and their in...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mch024
更新日期:2004-02-01 00:00:00
abstract:BACKGROUND AND AIMS:Leaf area of cotton seedlings (Gossypium hirsutum) can be reduced by as much as 50 % by early season thrips infestations, but it is well documented that plants can regain the difference in leaf area once infestation ceases. The processes involved in the recovery have not been identified. Hypotheses ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mch125
更新日期:2004-07-01 00:00:00
abstract::The various pollen dispersal units (PDU) found in orchids are discussed together with possible evolutionary trends and the consequences for germination and fertilization. Orchids with monad and tetrad pollen form more complex dispersal units by means of pollenkitt, elastoviscin, a callosic wall, common walls or a comb...
journal_title:Annals of botany
pub_type: 杂志文章,评审
doi:10.1093/aob/mcf138
更新日期:2002-06-01 00:00:00
abstract:BACKGROUNDS AND AIMS:Thermogenesis in reproductive organs is known from several plant families, including the Araceae. A study was made of the relationship between temperature increase and spadix size in the subfamily Aroideae in order to determine whether the quantitative variation of heat production among species and...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mci157
更新日期:2005-07-01 00:00:00
abstract:BACKGROUND AND AIMS:Despite the importance of vessels in angiosperm roots for plant water transport, there is little research on the microanatomy of woody plant roots. Vessels in roots can be interconnected networks or nearly solitary, with few vessel-vessel connections. Species with few connections are common in arid ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mct294
更新日期:2014-03-01 00:00:00
abstract:BACKGROUND:Previous phylogenetics studies of Asparagales, although extensive and generally well supported, have left several sets of taxa unclearly placed and have not addressed all relationships within certain clades thoroughly (some clades were relatively sparsely sampled). One of the most important of these is sampl...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcq167
更新日期:2010-11-01 00:00:00
abstract:BACKGROUND AND AIMS:Land-use changes and associated extinction/colonization dynamics can have a large impact on population genetic diversity of plant species. The aim of this study was to investigate genetic diversity in a founding population of the self-incompatible forest herb Primula elatior and to elucidate the pro...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcn253
更新日期:2009-03-01 00:00:00
abstract:BACKGROUND AND AIMS:Mating system is a primary determinant of the ecological and evolutionary dynamics of wild plant populations. Pollen limitation and loss of self-incompatibility genotypes can both act independently to reduce seed set and these effects are commonly observed in fragmented landscapes. This study used a...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcr290
更新日期:2012-02-01 00:00:00
abstract:BACKGROUND AND AIMS:Xylem flows into most fruits decline as the fruit develop, with important effects on mineral and carbohydrate accumulation. It has been hypothesized that an increase in xylem hydraulic resistance (RT) contributes to this process. This study examined changes in RT that occur during development of the...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mct101
更新日期:2013-07-01 00:00:00
abstract:BACKGROUND AND AIMS:Kip-related-proteins (KRPs), negative regulators of cell division, have recently been discovered in plants but their in planta function is as yet unclear. In this study the spatial expression of all seven KRP genes in shoot apices of Arabidopsis thaliana were compared. METHODS:In situ hybridization...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mch077
更新日期:2004-05-01 00:00:00
abstract:BACKGROUND:Mineral nutrient limitation affects the water flow through plants. We wanted to test on barley whether any change in root-to-shoot ratio in response to low supply of nitrogen and phosphate is accompanied by changes in root and cell hydraulic properties and involves changes in aquaporin (AQP) gene expression ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcz113
更新日期:2019-11-27 00:00:00
abstract::Background There has been renewed global interest in both genetic and management strategies to improve root system function in order to improve agricultural productivity and minimize environmental damage. Improving root system capture of water and nutrients is an obvious strategy, yet few studies consider the importan...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcw122
更新日期:2016-10-01 00:00:00
abstract:BACKGROUND AND AIMS:The evolution of interspecific reproductive barriers is crucial to understanding species evolution. This study examines the contribution of transitions between self-compatibility (SC) and self-incompatibility (SI) and genetic divergence in the evolution of reproductive barriers in Dendrobium, one of...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcv057
更新日期:2015-09-01 00:00:00
abstract:BACKGROUND AND AIMS:By the year 2100, atmospheric CO2 concentration ([CO2]a) could reach 800 ppm, having risen from ~200 ppm since the Neogene, beginning ~24 Myr ago. Changing [CO2]a affects plant carbon-water balance, with implications for growth, drought tolerance and vegetation shifts. The evolution of C4 photosynth...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcz048
更新日期:2019-08-02 00:00:00
abstract:BACKGROUND AND AIMS:AmapSim is a tool that implements a structural plant growth model based on a botanical theory and simulates plant morphogenesis to produce accurate, complex and detailed plant architectures. This software is the result of more than a decade of research and development devoted to plant architecture. ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcm194
更新日期:2008-05-01 00:00:00
abstract:BACKGROUND AND AIMS:Adaptive explanations for variation in sex allocation centre on variation in resource status and variation in the mating environment. The latter can occur when dichogamy causes siring opportunity to vary across the flowering season. In this study, it is hypothesized that the widespread tendency towa...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcu087
更新日期:2014-07-01 00:00:00