Abstract：
:Dormancy of hazel (Corylus avellana L.) seeds is alleviated by a chilling treatment during which cytological, hormonal, and biochemical changes occur. Phytic acid and phosphate mobilization have been examined during this treatment. Phytic acid accounted for 0.7% and up to 3.2% of dry weight in axiferous and cotyledonary tissue, respectively. Phytic acid levels in embryonic axes were reduced by 60% within the first 3 weeks of chilling, with little subsequent change, in contrast to warm-imbibed tissue where levels did not change significantly. In cotyledons, phytic acid was mobilized to a lesser extent. Phosphate levels expressed on a fresh weight basis remained almost unaltered suggesting either the operation of a homeostatic mechanism for intracellular concentration or rapid utilization due to active metabolism. Phytase activity increased during stratification in both axiferous and cotyledonary tissue. The initial rise observed was associated with dormancy alleviation, since it occurred before the realization of full germination potential by the seeds and not in warm-imbibed tissue. Protein bodies were isolated from hazel seeds by non-aqueous density gradients. Phytase activity was closely associated with the purified organelles, where phytic acid was located by light microscopy. Overall, these findings suggest that phytic acid mobilization by phytase and previously described processes associated with protein bodies, such as considerable proteolysis, are early participants in the plethora of events leading to seed dormancy relief and germination in hazel.
journal_name
J Exp Botjournal_title
Journal of experimental botanyauthors
Andriotis VM,Smith SB,Ross JDdoi
10.1093/jxb/eri032keywords:
subject
Has Abstractpub_date
2005-02-01 00:00:00pages
537-45issue
412eissn
0022-0957issn
1460-2431pii
eri032journal_volume
56pub_type
杂志文章abstract：:Plasma membrane vesicles isolated by two-phase partitioning from the storage root of Beta vulgaris show atypically high water permeability that is equivalent only to those reported for active aquaporins in tonoplast or animal red cells (Pf=542 microm s(-1)). The values were determined from the shrinking kinetics measu...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erj046
更新日期：2006-01-01 00:00:00
abstract：:Endosperm cap (CAP) weakening and embryo elongation growth are prerequisites for the completion of lettuce seed germination. Although it has been proposed that the cell wall loosening underlying these processes results from an enzymatic mechanism, it is still unclear which enzymes are involved. Here it is shown that r...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eru167
更新日期：2014-07-01 00:00:00
abstract：:Photo-oxidative stress was imposed under natural solar radiation on exposed and shaded sections of detached fruit of immature green tomato (Lycopersicon esculentum Miller = Solanum lycopersicum L.) mutants (anthocyanin absent, beta-carotene, Delta, and high pigment-1) and their nearly isogenic parents ('Ailsa Craig' a...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erj136
更新日期：2006-01-01 00:00:00
abstract：:In recent years, efforts to exploit sunlight, a free and abundant energy source, have sped up dramatically. Oxygenic photosynthetic organisms, such as higher plants, algae, and cyanobacteria, can convert solar energy into chemical energy very efficiently using water as an electron donor. By providing organic building ...
journal_title：Journal of experimental botany
pub_type： 杂志文章,评审
doi：10.1093/jxb/erz054
更新日期：2019-03-27 00:00:00
abstract：:Enzymes that reduce the aldehyde chemical grouping (i.e. H-C=O) to its corresponding alcohol are probably crucial in maintaining plant health during stress. Succinic semialdehyde (SSA) is a mitochondrially-generated intermediate in the metabolism of gamma-aminobutyrate (GABA), which accumulates in response to a variet...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/ern122
更新日期：2008-01-01 00:00:00
abstract：:Eutypa dieback is a vascular disease that may severely affect vineyards throughout the world. In the present work, microarrays were made in order (i) to improve our knowledge of grapevine (Vitis vinifera cv. Cabernet-Sauvignon) responses to Eutypa lata, the causal agent of Eutypa dieback; and (ii) to identify genes th...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erq040
更新日期：2010-06-01 00:00:00
abstract：:In apple (Malus×domestica) fruit, the different layers of the exocarp (cuticle, epidermis, and hypodermis) protect and maintain fruit integrity, and resist the turgor-driven expansion of the underlying thin-walled cortical cells during growth. Using in situ immunolocalization and size exclusion epitope detection chrom...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erz370
更新日期：2019-11-18 00:00:00
abstract：:Nitrogen (N) management is a promising agronomic strategy to minimize cadmium (Cd) contamination in crops. However, it is unclear how N affects Cd uptake by plants. Wild-type and iron uptake-inefficient tomato (Solanum lycopersicum) mutant (T3238fer) plants were grown in pH-buffered hydroponic culture to investigate t...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/ers036
更新日期：2012-05-01 00:00:00
abstract：:Leaf senescence is a programmed developmental process governed by various endogenous and exogenous factors, such as the plant developmental stage, leaf age, phytohormone levels, darkness, and exposure to stresses. It was found that, in addition to its well-documented role in the enhancement of plant frost tolerance, o...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erp300
更新日期：2010-01-01 00:00:00
abstract：:Plants are known to produce NO via the reduction of nitrite. Oxidative NO production in plants has been considered only with respect to a nitric oxide synthase (NOS). Here it is shown that tobacco cell suspensions emitted NO when hydroxylamine (HA) or salicylhydroxamate (SHAM), a frequently used AOX inhibitor, was add...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erp077
更新日期：2009-01-01 00:00:00
abstract：:A gene encoding a RING zinc finger ankyrin repeat protein (MjXB3), a putative E3 ubiquitin ligase, is highly expressed in petals of senescing four o'clock (Mirabilis jalapa) flowers, increasing >40,000-fold during the onset of visible senescence. The gene has homologues in many other species, and the Petunia homologue...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erm212
更新日期：2007-01-01 00:00:00
abstract：:Previously, the OEP16.1 channel pore in the outer envelope membrane of mature pea (Pisum sativum) chloroplasts in vitro has been characterized to be selective for amino acids. Isolation of OEP16.2, a second OEP16 isoform from pea, in the current study allowed membrane localization and gene expression of OEP16 to be fo...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/err375
更新日期：2012-03-01 00:00:00
abstract：:Sucrose-phosphate synthase (SPS) from the cyanobacterium Synechocystis sp. PCC 6803 lacks all of the Ser residues known to be involved in the regulation of higher plant SPS by protein phosphorylation. The Synechocystis SPS is also not allosterically regulated by glucose 6-phosphate or orthophosphate. To investigate th...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erg023
更新日期：2003-01-01 00:00:00
abstract：:To elucidate the phytohormonal basis of the feedback regulation of leaf senescence induced by potassium (K) deficiency in cotton (Gossypium hirsutum L.), two cultivars contrasting in sensitivity to K deficiency were self- and reciprocally grafted hypocotyl-to-hypocotyl, using standard grafting (one scion grafted onto ...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/ers238
更新日期：2012-10-01 00:00:00
abstract：:Lift-off velocity may be the most useful surrogate to measure the secondary dispersal capacity of diaspores. However, the most important diaspore attribute determining diaspore lift-off velocity is unclear. Furthermore, it is not known whether terminal velocity used to characterize the primary dispersal capacity of di...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eraa170
更新日期：2020-07-06 00:00:00
abstract：:Fleshy fruits are an essential part of the human diet providing vital vitamins, minerals and other health-promoting compounds. The texture of the ripe fruit has a significant effect on quality and influences consumer acceptance, shelf-life, resistance, and transportability. The development of rational approaches to im...
journal_title：Journal of experimental botany
pub_type： 杂志文章,评审
doi：10.1093/jxb/erf087
更新日期：2002-10-01 00:00:00
abstract：:The transcriptomes of senescing flag leaves collected from barley field plots with standard or high nitrogen supply were compared to identify genes specifically associated with nitrogen remobilization during leaf senescence under agronomically relevant conditions. In flag leaves collected in field plots with high nitr...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eru094
更新日期：2014-07-01 00:00:00
abstract：:The aim of this study is to understand the parameters regulating calcium ion distribution in leaves. Accumulation of ions in leaf tissue is in part dependent on import from the xylem. This import via the transpiration stream is more important for ions such as calcium that are xylem but not phloem mobile and cannot the...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/ern279
更新日期：2009-01-01 00:00:00
abstract：:Whole apple fruit (Malus domestica Borkh.) widely differing in pigment content and composition has been examined by recording its chlorophyll fluorescence excitation and diffuse reflection spectra in the visible and near UV regions. Spectral bands sensitive to the pigment concentration have been identified, and linear...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erm316
更新日期：2008-01-01 00:00:00
abstract：:Sugarcane (Saccharum officinarum) is a globally cultivated cash crop whose yield is negatively affected by soil salinity. In this study, we investigated the molecular basis of inducible salt tolerance in M4209, a sugarcane mutant line generated through radiation-induced mutagenesis. Under salt-contaminated field condi...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eraa339
更新日期：2020-10-07 00:00:00
abstract：:To study the effect of root-zone pH on characteristic responses of NH4+ -fed plants, soybeans (Glycine max¿L.¿ Merr. cv. Ransom) were grown in flowing solution culture for 21 d on four sources of N (1.0 mol m-3 NO3-, 0.67 mol m-3 NO3- plus 0.33 mol m-3 NH4+, 0.33 mol m-3 NO3- plus 0.67 mol m-3 NH4+, and 1.0 mol m-3 NH...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/42.2.189
更新日期：1991-02-01 00:00:00
abstract：:Meiosis is an essential process for sexually reproducing organisms, leading to the formation of specialized generative cells. This review intends to highlight current knowledge of early events during meiosis derived from various model organisms, including plants. It will particularly focus on cis- and trans-requiremen...
journal_title：Journal of experimental botany
pub_type： 杂志文章,评审
doi：10.1093/jxb/erq421
更新日期：2011-03-01 00:00:00
abstract：:FUSCA3 (FUS3) is a short-lived B3-domain transcription factor that regulates seed development and phase transitions in Arabidopsis thaliana. The mechanisms controlling FUS3 levels are currently poorly understood. Here we show that FUS3 interacts with the RING E3 ligase ABI3-INTERACTING PROTEIN2 (AIP2). AIP2-green fluo...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erx046
更新日期：2017-03-01 00:00:00
abstract：:In angiosperms, fertilization and subsequent zygotic development occur in embryo sacs deeply embedded in the ovaries; therefore, these processes are poorly elucidated. In this study, microarray-based transcriptome analyses were conducted on rice sperm cells, egg cells, and zygotes isolated from flowers to identify can...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/ert054
更新日期：2013-04-01 00:00:00
abstract：:Polyacetylene (PA) compounds from Bidens pilosa are known to have several pharmacological activities. In this study, we aimed to elucidate the major genes encoding enzymes involved in the biosynthesis of PA in B. pilosa. Seven PA metabolites present in B. pilosa leaves were found to be induced by methyl jasmonate (MeJ...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eraa457
更新日期：2020-10-16 00:00:00
abstract：:The cyclic nucleotide cGMP has been shown to play important roles in plant development and responses to abiotic and biotic stress. Yet much controversy remains regarding the exact role of this second messenger. Progress in unravelling cGMP function in plants was hampered by laborious and time-consuming methodology to ...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/ers045
更新日期：2012-05-01 00:00:00
abstract：:Nitrate assimilation was analysed in chicory plants (Cichorium intybus L. cv. Turbo) during the early vegetative growth. Nitrate reductase (NR, EC 1.6.6.1) activity (NRA) was measured in roots and leaves at different developmental stages. During phase I, which corresponds to the structural growth (21-42 DAS), nitrate ...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jexbot/51.344.539
更新日期：2000-03-01 00:00:00
abstract：:Transcriptional studies in relation to fruit ripening generally aim to identify the transcriptional states associated with physiological ripening stages and the transcriptional changes between stages within the ripening programme. In non-climacteric fruits such as grape, all ripening-related genes involved in this pro...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eru329
更新日期：2014-11-01 00:00:00
abstract：:Witches' broom disease (WBD) of cacao differs from other typical hemibiotrophic plant diseases by its unusually long biotrophic phase. Plant carbon sources have been proposed to regulate WBD developmental transitions; however, nothing is known about their availability at the plant-fungus interface, the apoplastic flui...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eru485
更新日期：2015-03-01 00:00:00
abstract：:The mistletoe, Viscum album, living on Scots pine (Pinus sylvestris) has been reported barely to regulate its transpiration and thus heavily to affect the gas exchange of its host. The extent of this mistletoe effect and its underlying mechanism has, so far, only been partially analysed. In this study, pine branches w...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/err432
更新日期：2012-04-01 00:00:00
