Abstract:
BACKGROUND AND AIMS:Under predicted climate change scenarios, increased temperatures are likely to predispose trees to leaf and other tissue damage, resulting in plant death and contraction of already narrow distribution ranges in many relictual species. The effects of predicted upward temperatures may be further exacerbated by changes in rainfall patterns and damage caused by frosts on trees that have been insufficiently cold-hardened. The Araucariaceae is a relictual family and the seven species found in Australia have limited natural distributions characterized by low frost intensity and frequency, and warm summer temperatures. The temperature limits for these species were determined in order to help understand how such species will fare in a changing climate. METHODS:Experiments were conducted using samples from representative trees of the Araucariaceae species occurring in Australia, Agathis (A. atropurpurea, A. microstachya and A. robusta), Arauacaria (A. bidwilli, A. cunninghamii and A. heterophylla) and Wollemia nobilis. Samples were collected from plants grown in a common garden environment. Lower and higher temperature limits were determined by subjecting detached winter-hardened leaves to temperatures from 0 to -17 °C and summer-exposed leaves to 25 to 63 °C, then measuring the efficiency of photosystem II (F(v)/F(m)) and visually rating leaf damage. The exotherm, a sharp rise in temperature indicating the point of ice nucleation within the cells of the leaf, was measured on detached leaves of winter-hardened and summer temperature-exposed leaves. KEY RESULTS:Lower temperature limits (indicated by FT(50), the temperature at which PSII efficiency is 50 %, and LT(50) the temperature at which 50 % visual leaf damage occurred) were approx. -5·5 to -7·5 °C for A. atropurpurea, A. microstachya and A. heterophylla, approx. -7 to -9 °C for A. robusta, A. bidwillii and A. cunninghamii, and -10·5 to -11 °C for W. nobilis. High temperature damage began at 47·5 °C for W. nobilis, and occurred in the range 48·5-52 °C for A. bidwillii and A. cunninghamii, and in the range 50·5-53·5 °C for A. robusta, A. microstachya and A. heterophylla. Winter-hardened leaves had ice nucleation temperatures of -5·5 °C or lower, with W. nobilis the lowest at -6·8 °C. All species had significantly higher ice nucleation temperatures in summer, with A. atropurpurea and A. heterophylla forming ice in the leaf at temperatures >3 °C higher in summer than in winter. Wollemia nobilis had lower FT(50) and LT(50) values than its ice nucleation temperature, indicating that the species has a degree of ice tolerance. CONCLUSIONS:While lower temperature limits in the Australian Araucariaceae are generally unlikely to affect their survival in wild populations during normal winters, unseasonal frosts may have devastating effects on tree survival. Extreme high temperatures are not common in the areas of natural occurrence, but upward temperature shifts, in combination with localized radiant heating, may increase the heat experienced within a canopy by at least 10 °C and impact on tree survival, and may contribute to range contraction. Heat stress may explain why many landscape plantings of W. nobilis have failed in hotter areas of Australia.
journal_name
Ann Botjournal_title
Annals of botanyauthors
Offord CAdoi
10.1093/aob/mcr135subject
Has Abstractpub_date
2011-08-01 00:00:00pages
347-57issue
2eissn
0305-7364issn
1095-8290pii
mcr135journal_volume
108pub_type
杂志文章相关文献
ANNALS OF BOTANY文献大全abstract:BACKGROUND AND AIMS:Size-asymmetric competition occurs when larger plants have a disproportionate advantage in competition with smaller plants. It has been hypothesized that nutrient heterogeneity may promote it. Experiments testing this hypothesis are inconclusive, and in most cases have evaluated the effects of nutri...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcl093
更新日期:2006-07-01 00:00:00
abstract:BACKGROUND AND AIMS:Quercus coccifera, as a long-lived sprouter, responds plastically to environmental variation. In this study, the role of foliar plasticity as a mechanism of habitat selection and modification within the canopy and across contrasted habitats was characterized. An examination was made of the different...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcm112
更新日期:2007-08-01 00:00:00
abstract::Flowering activity and sex expression of Bischofia javanica Blume were investigated for 3 years. B. javanica is an invasive dioecious tree of subtropical forests on the Bonin Islands in the western Pacific of Japan. The sex ratio showed a significant male bias (1.25-2.33). Smaller trees were significantly male biased,...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcf231
更新日期:2002-11-01 00:00:00
abstract:BACKGROUND:Robustness to genetic and environmental perturbation is a salient feature of multicellular organisms. Loss of developmental robustness can lead to severe phenotypic defects and fitness loss. However, perfect robustness, i.e. no variation at all, is evolutionarily unfit as organisms must be able to change phe...
journal_title:Annals of botany
pub_type: 杂志文章,评审
doi:10.1093/aob/mcv151
更新日期:2016-04-01 00:00:00
abstract:Background and Aims:During the growing season, the cambium of conifer trees produces successive rows of xylem cells, the tracheids, that sequentially pass through the phases of enlargement and secondary wall thickening before dying and becoming functional. Climate variability can strongly influence the kinetics of morp...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcw274
更新日期:2017-04-01 00:00:00
abstract:BACKGROUND AND AIMS:Lomatium dissectum (Apiaceae) is a perennial, herbaceous plant of wide distribution in Western North America. At the time of dispersal, L. dissectum seeds are dormant and have under-developed embryos. The aims of this work were to determine the requirements for dormancy break and germination, to cha...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcp038
更新日期:2009-05-01 00:00:00
abstract:BACKGROUND AND SCOPE:Over more than 120 years of scientific study since Schimper's seminal work, the recognized categories of structurally dependent plants have changed several times. Currently, ignoring parasitic mistletoes, it is usual to distinguish four functional groups: (1) true epiphytes; (2) primary hemiepiphyt...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mct085
更新日期:2013-06-01 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:Cotton (Gossypium hirsutum) has indeterminate growth. The growth regulator mepiquat chloride (MC) is used worldwide to restrict vegetative growth and promote boll formation and yield. The effects of MC are modulated by complex interactions with growing conditions (nutrients, weather) and plant popul...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mct309
更新日期:2014-09-01 00:00:00
abstract:BACKGROUND AND AIMS:Data are presented from 39 species of mosses and 16 liverworts for ratios of chlorophylls and total carotenoids, and light saturation of photosynthetic electron flow or photosynthetic CO2 uptake, in relation to the postulate that bryophyte cells in general show shade-plant characteristics. METHODS:...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mch178
更新日期:2004-10-01 00:00:00
abstract:BACKGROUND AND AIMS:Lippia scaberrima, an aromatic indigenous South African plant, with medicinal application, potentially has economic value. The production of essential oil from this plant has not been optimized, and this study of the chemico-morphological characteristics was aimed at determining the location of oil ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcm064
更新日期:2007-06-01 00:00:00
abstract:BACKGROUND AND AIMS:During sexual reproduction in higher angiosperms, the pollen tubes are directed to the ovules in the pistil to deliver sperm cells. This pollen tube attraction is highly species specific, and a group of small secreted proteins, TfCRPs, are necessary for this process in Torenia fournieri. METHODS:A ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcr111
更新日期:2011-09-01 00:00:00
abstract:BACKGROUND AND AIMS:Pollinator specificity facilitates reproductive isolation among plants, and mechanisms that generate specificity influence species boundaries. Long-range volatile attractants, in combination with morphological co-adaptations, are generally regarded as being responsible for maintaining extreme host s...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcs250
更新日期:2013-02-01 00:00:00
abstract:BACKGROUND AND AIMS:In a range of plant species, the distribution of individual mean fecundity is skewed and dominated by a few highly fecund individuals. Larger plants produce greater seed crops, but the exact nature of the relationship between size and reproductive patterns is poorly understood. This is especially cl...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcaa118
更新日期:2020-10-06 00:00:00
abstract:BACKGROUND AND AIMS:Phosphorus commonly limits crop yield and is frequently applied as fertilizer; however, supplies of quality rock phosphate for fertilizer production are diminishing. Plants have evolved many mechanisms to increase their P-fertilizer use efficiency, and an understanding of these traits could result i...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcs085
更新日期:2012-07-01 00:00:00
abstract:Background and Aims:The division of resource investment between male and female functions is poorly known for land plants other than angiosperms. The ancient lycophyte genus Selaginella is similar in some ways to angiosperms (in heterospory and in having sex allocation occur in the sporophyte generation, for example) b...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcx163
更新日期:2018-02-12 00:00:00
abstract:BACKGROUND:A huge variety of plant forms can be found in nature. This is particularly noticeable for inflorescences, the region of the plant that contains the flowers. The architecture of the inflorescence depends on its branching pattern and on the relative position where flowers are formed. In model species such as A...
journal_title:Annals of botany
pub_type: 杂志文章,评审
doi:10.1093/aob/mcm146
更新日期:2007-09-01 00:00:00
abstract::The effects of P deficiency on growth, N(2)-fixation and photosynthesis in white clover (Trifolium repens L.) plants were investigated using three contrasting relative addition rates of P, or following abrupt withdrawal of the P supply. Responses to a constant below-optimum P supply rate consisted of a decline in N(2)...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcf260
更新日期:2002-12-01 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:Mechanical perturbation is known to inhibit elongation of the inflorescence stem of Arabidopsis thaliana. The phenomenon has been reported widely for both herbaceous and woody plants, and has implications for how plants adjust their size and form to survive in mechanically perturbed environments. Wh...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcq227
更新日期:2011-02-01 00:00:00
abstract:BACKGROUND AND AIMS:The sedge genus Carex, the most diversified angiosperm genus of the northern temperate zone, is renowned for its holocentric chromosomes and karyotype variability. The genus exhibits high variation in chromosome numbers both among and within species. Despite the possibility that this chromosome evol...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mct119
更新日期:2013-08-01 00:00:00
abstract:BACKGROUND AND AIMS:Mikania micrantha, a climbing perennial weed of the family Asteraceae, is native to Latin America and is highly invasive in the tropical belt of Asia, Oceania and Australia. This study was framed to investigate the population structure of M. micrantha at a large spatial scale in Asia and to identify...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcaa044
更新日期:2020-06-01 00:00:00
abstract:BACKGROUND AND AIMS:Covalent linkages between xyloglucan and rhamnogalacturonan-I (RG-I) have been reported in the primary cell walls of cultured Rosa cells and may contribute to wall architecture. This study investigated whether this chemical feature is general to angiosperms or whether Rosa is unusual. * METHODS:Xyl...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mci153
更新日期:2005-07-01 00:00:00
abstract:BACKGROUND AND AIMS:Tea (Camellia sinensis) is considered to be acid tolerant and prefers ammonium nutrition, but the interaction between root zone acidity and N form is not properly understood. The present study was performed to characterize their interaction with respect to growth and mineral nutrition. METHODS:Tea ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcl258
更新日期:2007-02-01 00:00:00
abstract:BACKGROUND AND AIMS:Plants adapted for pollination by rodents tend to exhibit a distinct floral syndrome that includes dull coloured and geoflorous inflorescences and nocturnal anthesis and nectar production. On the basis of their floral traits, it was predicted that two African Colchicum species (C. scabromarginatum a...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcn157
更新日期:2008-11-01 00:00:00
abstract::Although active oxygen species are produced at high rates in both the chloroplasts and peroxisomes of the leaves of C3 plants, most attention has focused on the potentially damaging consequences of enhanced chloroplastic production in stress conditions such as drought. This article attempts to provide quantitative est...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcf096
更新日期:2002-06-01 00:00:00
abstract:BACKGROUND AND AIMS:Heterodichogamy differs from normal dichogamy, in that it involves two mating types (protogyny and protandry) that occur at a 1 : 1 ratio in a population. Flowering phases of the two mating types are synchronized and reciprocal, which was considered to ensure between-type outcrossing. This study aim...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcl111
更新日期:2006-08-01 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:Current understanding of stomatal development in Arabidopsis thaliana is based on mutations producing aberrant, often lethal phenotypes. The aim was to discover if naturally occurring viable phenotypes would be useful for studying stomatal development in a species that enables further molecular anal...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcr060
更新日期:2011-06-01 00:00:00
abstract:BACKGROUND AND AIMS:Wetlands are impacted by changes in hydrological regimes that can lead to periods of low water levels. During these periods, aquatic plants experience a drastic change in the mechanical conditions that they encounter, from low gravitational and tensile hydrodynamic forces when exposed to flow under ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mct221
更新日期:2013-12-01 00:00:00