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 is strongly up-regulated in senescing Petunia corollas. Silencing the expression of this gene in Petunia, using virus-induced gene silencing, resulted in a 2 d extension in flower life. In Mirabilis, a 2 kb promoter region, 5' upstream of the MjXB3 gene, was isolated. The promoter sequence included putative binding sites for many DNA-binding proteins, including the bZIP, Myb, homeodomain-leucine zipper (HD-Zip), MADS-box, and WRKY transcription factors. The construct containing a 1 kb promoter region immediately upstream of the MjXB3 gene drove the strongest expression of the beta-glucuronidase (GUS) reporter gene in a transient expression assay. In Petunia, GUS expression under the control of this heterologous promoter fragment was specific to senescing flowers. The Mirabilis promoter GUS construct was tested in other flower species; while GUS activity in carnation petals was high during senescence, no expression was detected in three monocotyledonous flowers--daylily (Hemerocallis 'Stella d'Oro'), daffodil (Narcissus pseudonarcissus 'King Alfred'), and orchid (Dendrobium 'Emma White').
journal_name
J Exp Botjournal_title
Journal of experimental botanyauthors
Xu X,Jiang CZ,Donnelly L,Reid MSdoi
10.1093/jxb/erm212subject
Has Abstractpub_date
2007-01-01 00:00:00pages
3623-30issue
13eissn
0022-0957issn
1460-2431pii
erm212journal_volume
58pub_type
杂志文章abstract::The phenomenal increase in agricultural yields that we have witnessed in the last century has slowed down as we approach the limits of selective breeding and optimization of cultivation techniques. To support the yield increase required to feed an ever-growing population, we will have to identify new ways to boost the...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/erz029
更新日期:2019-03-11 00:00:00
abstract::Crotalaria are plants of the Fabaceae family whose nodulation characteristics have been little explored despite the recent discovery of their unexpected ability to be efficiently nodulated in symbiosis with bacteria of the genus Methylobacterium. It has been shown that methylotrophy plays a key role in this unusual sy...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/err083
更新日期:2011-06-01 00:00:00
abstract::Cytoplasmic male sterility (CMS) is a widespread phenomenon in flowering plants caused by mitochondrial (mt) genes. CMS genes typically encode novel proteins that interfere with mt functions and can be silenced by nuclear fertility-restorer genes. Although the molecular basis of CMS is well established in a number of ...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erx057
更新日期:2017-03-01 00:00:00
abstract::Apoplastic transport barriers in the roots of rice (Oryza sativa L. cv. IR64) and corn (Zea mays L. cv. Helix) were isolated enzymatically. Following chemical degradation (monomerization, derivatization), the amounts of aliphatic and aromatic suberin monomers were analysed quantitatively by gas chromatography and mass...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/eri144
更新日期:2005-05-01 00:00:00
abstract::Nitrate and ammonia deferentially modulate primary metabolism during the hypersensitive response in tobacco. In this study, tobacco RNAi lines with low nitrite reductase (NiRr) levels were used to investigate the roles of nitrite and nitric oxide (NO) in this process. The lines accumulate NO2-, with increased NO gener...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erz161
更新日期:2019-08-29 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 C4 photosynthetic pathway uses water more efficiently than the C3 type, yet biogeographical analyses show a decline in C4 species relative to C3 species with decreasing rainfall. To investigate this paradox, the hypothesis that the C4 advantage over C3 photosynthesis is diminished by drought was tested, and the un...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erl302
更新日期:2007-01-01 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::A method for the quantification of S-RNase levels in single styles of self-incompatible Solanum chacoense was developed and applied toward an experimental determination of the S-RNase threshold required for pollen rejection. It was found that, when single style values are averaged, accumulated levels of the S(11)- and...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erj147
更新日期:2006-01-01 00:00:00
abstract::The aim of this study was to determine the relationship between shoot nitrate concentration, mediated by nitrate supply to roots, and root exudation from Hordeum vulgare. Plants were grown for 14 d in C-free sand microcosms, supplied with nutrient solution containing 2 mM nitrate. After this period, three treatments w...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erg017
更新日期:2003-01-01 00:00:00
abstract::Soluble carbohydrates not only directly affect plant growth and development but also act as signal molecules in processes that enhance tolerance to cold stress. Raffinose family oligosaccharides (RFOs) are an example and play an important role in abiotic stress tolerance. This study aimed to determine whether galactin...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erz450
更新日期:2020-01-01 00:00:00
abstract::Our current understanding of how plants move auxin through their tissues is largely built on the use of polar auxin transporter inhibitors. Although the most important proteins that mediate auxin transport and its regulation have probably all been identified and the mapping of their interactions is well underway, mech...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/erx323
更新日期:2018-01-04 00:00:00
abstract::Festuca arundinacea is one of the most drought-tolerant species within the Lolium-Festuca complex and was used as a model for research aimed at identifying the chloroplast components involved in the proteomic response for drought stress in forage grasses. Individual F. arundinacea genotypes with contrasting levels of ...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ers265
更新日期:2012-10-01 00:00:00
abstract::Understanding how green sink strength is regulated in planta poses a difficult problem because non-structural carbohydrate (NSC) levels can have integrated, simultaneous feedback effects on photosynthesis, sugar uptake, and respiration that depend on specific NSC moieties. Photosynthetic gametophytes of the fern Cerat...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erq407
更新日期:2011-03-01 00:00:00
abstract::C4 photosynthesis involves a close collaboration of the C3 and C4 metabolic cycles across the mesophyll and bundle-sheath cells. This study investigated the coordination of C4 photosynthesis in maize plants subjected to two salinity (50 and 100mM NaCl) treatments and one shade (20% of full sunlight) treatment. Photosy...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/eru130
更新日期:2014-07-01 00:00:00
abstract::This work examines the involvement of haem oxygenase-1 (HO-1) in salicylic acid (SA)-induced alleviation of oxidative stress as a result of cadmium (Cd) stress in alfalfa (Medicago sativa L.) seedling roots. CdCl(2) exposure caused severe growth inhibition and Cd accumulation, which were potentiated by pre-treatment w...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ers201
更新日期:2012-09-01 00:00:00
abstract::Images taken at different spectral bands are increasingly used for characterizing plants and their health status. In contrast to conventional point measurements, imaging detects the distribution and quantity of signals and thus improves the interpretation of fluorescence and reflectance signatures. In multispectral fl...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/erl207
更新日期:2007-01-01 00:00:00
abstract::Rapid changes in turgor pressure (P:) and temperature (T:) are giving new information about the mechanisms of plant growth. In the present work, single internode cells of the large-celled alga Chara corallina were used as a model for plant growth. P was changed without altering the chemical environment of the wall whi...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jexbot/51.350.1481
更新日期:2000-09-01 00:00:00
abstract::A model of kiwifruit berry development is presented, building on the model of Fishman and Génard used for peach fruit. That model has been extended to incorporate a number of important features of kiwifruit growth. First, the kiwifruit berry is attached to the stem through a pedicel/receptacle complex which contribute...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ert317
更新日期:2013-12-01 00:00:00
abstract::Soil respiration is affected by distributions of roots and soil carbon substrates and by temperature and soil water content, all of which vary spatially and temporally. The objective of this paper was to compare a manual system for measuring soil respiration in a temperate forest, which had a greater spatial distribut...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erg121
更新日期:2003-03-01 00:00:00
abstract::Plants respond to many environmental changes by rapidly adjusting their hydraulic conductivity and transpiration rate, thereby optimizing water-use efficiency and preventing damage due to low water potential. A multiple-load-cell apparatus, time-series analysis of the measured data, and residual low-pass filtering met...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erq168
更新日期:2010-07-01 00:00:00
abstract::Root gravitropism is affected by many environmental stresses, including salinity, drought, and nutrient deficiency. One significant environmental stress, excess ammonium (NH(4)(+)), is well documented to inhibit root elongation and lateral root formation, yet little is known about its effects on the direction of root ...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ers068
更新日期:2012-06-01 00:00:00
abstract::The soil-borne fungal pathogen Verticillium dahliae infects a wide range of dicotyledonous plants including cotton, tobacco, and Arabidopsis. Among the effector proteins secreted by V. dahliae, the 16 kDa PevD1 induces a hypersensitive response in tobacco. Here we report the high-resolution structure of PevD1 with fol...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erx192
更新日期:2017-06-15 00:00:00
abstract::The molecular mechanisms of abscisic acid (ABA) signalling have been studied for many years; however, how mitochondria-localized proteins play roles in ABA signalling remains unclear. Here an Arabidopsis mitochondria-localized protein RRL (RETARDED ROOT GROWTH-LIKE) was shown to function in ABA signalling. A previous ...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erv356
更新日期:2015-10-01 00:00:00
abstract::14C-salicylic acid (SA) was used to monitor SA metabolism and its regulation in tobacco cell suspension culture. Two SA concentrations (20 microM and 200 microM) were used for comparison. SA was quickly taken up in both treatments, and the 200 microM-treated cells absorbed approximately 15 times that of 20 microM-trea...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:
更新日期:2001-06-01 00:00:00
abstract::In order to investigate the physiological role of ethylene in the initiation and subsequent progression of softening, pear fruit were treated with propylene, an analogue of ethylene or 1-methylcyclopropene (1-MCP), a gaseous inhibitor of ethylene action at the preclimacteric or ripening stages. The propylene treatment...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erg073
更新日期:2003-02-01 00:00:00
abstract::PaHB1 (for Picea abies Homeobox1), an evolutionarily conserved HD-GL2 homeobox gene, specifically expressed in the protoderm during somatic embryogenesis in the gymnosperm Norway spruce has been reported previously. An additional HD-GL2 gene designated PaHB2 is reported here. During somatic embryogenesis, the PaHB2 ge...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erg145
更新日期:2003-05-01 00:00:00
abstract::Brassinosteroids (BRs) are a group of steroid hormones regulating plant growth and development. Since BRs do not undergo transport among plant tissues, their metabolism is tightly regulated by transcription factors (TFs) and feedback loops. BAS1 (CYP734A1, formerly CYP72B1) and SOB7 (CYP72C1) are two BR-inactivating c...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erz468
更新日期:2020-01-23 00:00:00
abstract::The phytohormone ethylene plays important roles in regulating plant responses to phosphate (Pi) starvation. To date, however, no molecular components have been identified that interact with ethylene signalling in regulating such responses. In this work, an Arabidopsis mutant, hps4, was characterized that exhibits enha...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ers131
更新日期:2012-07-01 00:00:00
abstract::A jasmonate-inducible lectin called Nicotiana tabacum agglutinin or NICTABA was found in tobacco (Nicotiana tabacum cv Samsun) leaves. Since NICTABA expression is also induced after insect herbivory, a role in the defence response of tobacco was suggested. In this report, a detailed analysis was made of the entomotoxi...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erp365
更新日期:2010-02-01 00:00:00