Abstract：
:Small non-coding RNAs are key post-transcriptional and transcriptional regulators of plant gene expression in angiosperm sporophytes. In recent years, gametophytic small RNAs have also been investigated, predominantly in Arabidopsis male gametophytes, revealing features in common with the sporophyte as well as some surprising differences. Transcriptomic and deep-sequencing studies confirm that multiple small RNA pathways operate in male gametophytes, with over 100 miRNAs detected throughout development. Trans-acting siRNA pathways that are associated with novel phased transcripts in pollen, and the nat-siRNA pathway have important roles in pollen maturation and gamete function. Moreover, a role for siRNA-triggered silencing of transposable elements in male and female germ cells has been established, a feature in common with the role of piRNAs in animal germlines. Current evidence supports an integral role for small RNAs in angiosperm gametophyte development and it can be anticipated that novel small RNAs with significant roles in germline development and genome integrity await discovery.
journal_name
J Exp Botjournal_title
Journal of experimental botanyauthors
Le Trionnaire G,Grant-Downton RT,Kourmpetli S,Dickinson HG,Twell Ddoi
10.1093/jxb/erq399subject
Has Abstractpub_date
2011-03-01 00:00:00pages
1601-10issue
5eissn
0022-0957issn
1460-2431pii
erq399journal_volume
62pub_type
杂志文章,评审abstract：:Successful sexual reproduction often relies on the ability of plants to recognize self- or genetically-related pollen and prevent pollen tube growth soon after germination in order to avoid self-fertilization. Angiosperms have developed different reproductive barriers, one of the most extended being self-incompatibili...
journal_title：Journal of experimental botany
pub_type： 杂志文章,评审
doi：10.1093/jxb/erv083
更新日期：2015-05-01 00:00:00
abstract：:Chloroplasts and mitochondria are indispensable for plant development. They not only provide energy and carbon sources to cells, but also have evolved to become major players in a variety of processes such as amino acid metabolism, hormone biosynthesis and cellular signalling. As semi-autonomous organelles, they conta...
journal_title：Journal of experimental botany
pub_type： 杂志文章,评审
doi：10.1093/jxb/erw399
更新日期：2016-12-01 00:00:00
abstract：:Improving photosynthesis is considered a promising way to increase crop yield to feed a growing population. Realizing this goal requires non-destructive techniques to quantify photosynthetic variation among crop cultivars. Despite existing remote sensing-based approaches, it remains a question whether solar-induced fl...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eraa537
更新日期：2020-12-19 00:00:00
abstract：:ω-3 fatty acid desaturases (FADs) are thought to contribute to plant stress tolerance mainly through linolenic acid (C18:3)-induced membrane stabilization, but a comprehensive analysis of their roles in stress adaptation is lacking. Here, we isolated a microsomal ω-3 FAD gene (CbFAD3) from a cryophyte (Chorispora bung...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/ery050
更新日期：2018-04-09 00:00:00
abstract：:While marine phytoplankton rival plants in their contribution to global primary productivity, our understanding of their photosynthesis remains rudimentary. In particular, the kinetic diversity of the CO2-fixing enzyme, Rubisco, in phytoplankton remains unknown. Here we quantify the maximum rates of carboxylation (k c...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erw163
更新日期：2016-05-01 00:00:00
abstract：:Understanding the accumulation and distribution of essential nutrients in cereals is of primary importance for improving the nutritional quality of this staple food. While recent studies have improved the understanding of micronutrient loading into the barley grain, a detailed characterization of the distribution of m...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erq270
更新日期：2011-01-01 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：: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：:Changes in root hydraulic resistance in response to alterations in nitrate supply were explored in detail as a potential mechanism that allows plants to respond rapidly to changes in their environment. Sunflower (Helianthus annuus cv. Holiday) plants grown hydroponically with limited nitrate availability (200 micromol...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erm118
更新日期：2007-01-01 00:00:00
abstract：:In C(3) plants, diffusion of CO(2) into leaves is restricted by stomata and subsequently by the intercellular airspaces and liquid phase into chloroplasts. While considerable information exists on the effect of environmental conditions on stomatal conductance (g(s)), little is known on whether the mesophyll conductanc...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erp035
更新日期：2009-01-01 00:00:00
abstract：:Symbiotic nitrogen fixation carried out in legume root nodules requires transition metals. These nutrients are delivered by the host plant to the endosymbiotic nitrogen-fixing bacteria living within the nodule cells, a process in which vascular transport is essential. As members of the Yellow Stripe-Like (YSL) family ...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eraa390
更新日期：2020-12-31 00:00:00
abstract：:The possible role of photorespiration as a general stress protection mechanism, and in C(4) plant metabolism, is controversial. In particular, the potential involvement of photorespiration in the acquisition of desiccation tolerance in 'resurrection' plants is unknown. An investigation was carried out into whether pho...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erm247
更新日期：2007-01-01 00:00:00
abstract：:Voltage dependence of ionic currents and ion fluxes in a walled, turgor-regulating cell were measured in Neurospora crassa. The hyphal morphology of the model organism Neurospora simplifies cable analysis of ionic currents to determine current density for quantitative comparisons with ion fluxes. The ion fluxes were m...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erm204
更新日期：2007-01-01 00:00:00
abstract：:Xylella fastidiosa, a xylem-limited bacterial pathogen that causes bacterial leaf scorch in its hosts, has a diverse and extensive host range among plant species worldwide. Previous work has shown that water stress enhances leaf scorch symptom severity and progression along the stem in Parthenocissus quinquefolia infe...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erg046
更新日期：2003-01-01 00:00:00
abstract：:Dihydroflavonol 4-reductase (DFR) is the first committed enzyme of the anthocyanin and condensed tannin pathways. Several DFR cDNAs have been cloned, and different specificities of DFR isozymes in the substrate hydroxylation patterns have been reported, but only fragmentary knowledge of DFR gene organization is availa...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eri251
更新日期：2005-09-01 00:00:00
abstract：:Photorespiration is an essential high flux metabolic pathway that is found in all oxygen-producing photosynthetic organisms. It is often viewed as a closed metabolic repair pathway that serves to detoxify 2-phosphoglycolic acid and to recycle carbon to fuel the Calvin-Benson cycle. However, this view is too simplistic...
journal_title：Journal of experimental botany
pub_type： 杂志文章,评审
doi：10.1093/jxb/erw145
更新日期：2016-05-01 00:00:00
abstract：:Wood formation in trees is a dynamic process that is strongly affected by environmental factors. However, the impact of ozone on wood is poorly documented. The objective of this study was to assess the effects of ozone on wood formation by focusing on the two major wood components, cellulose and lignin, and analysing ...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/err047
更新日期：2011-06-01 00:00:00
abstract：:Potato has been genetically engineered for the production of commercially important ketocarotenoids including astaxanthin (3,3'-dihydroxy 4,4'-diketo-beta-carotene). To support the formation of 3-hydroxylated and 4-ketolated beta-carotene, a transgenic potato line accumulating zeaxanthin due to inactivated zeaxanthin ...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erl103
更新日期：2006-01-01 00:00:00
abstract：:Sugars regulate the expression of many genes at the transcriptional level. In Arabidopsis thaliana, sugars induce or repress the expression of >1800 genes, including the STP1 (SUGAR TRANSPORTER PROTEIN 1) gene, which encodes an H(+)/monosaccharide cotransporter. STP1 transcript levels decrease more rapidly after the a...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eru394
更新日期：2015-01-01 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：:The activation of calcium signaling is a crucial event for perceiving environmental stress. Colonization by Piriformospora indica, a growth-promoting root endosymbiont, activates cytosolic Ca2+ in Arabidopsis roots. In this study, we examined the role and functional relevance of calcium channels responsible for Ca2+ f...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eraa028
更新日期：2020-05-09 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：:Plants resistant to aluminium (Al) stress were isolated from Arabidopsis thaliana enhancer-tagged mutant lines. Compared with the parental Col-7 control line, one of the resistant candidates, #355-2, showed a higher expression of the F9E10.5 gene (At1g75100) on chromosome 1, a lower Al content in whole roots, and a sh...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erl221
更新日期：2007-01-01 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：:Low temperature affects seed germination in plants, and low-temperature germination (LTG) is an important agronomic trait. Natural variation of LTG has been reported in rice, but the molecular basis for this variation is largely unknown. Here we report the phenotypic analysis of LTG in 187 rice natural accessions and ...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erx413
更新日期：2018-01-23 00:00:00
abstract：:In this paper, we describe the thought process and initial data behind the development of an imaging platform (LeasyScan) combined with lysimetric capacity, to assess canopy traits affecting water use (leaf area, leaf area index, transpiration). LeasyScan is based on a novel 3D scanning technique to capture leaf area ...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erv251
更新日期：2015-09-01 00:00:00
abstract：:Intact coconuts were germinated in situ and compared with excised zygotic embryos germinated in vitro. The growth of the embryonic tissue and their fatty acid compositions were measured. Haustoria, plumules and radicles of coconuts germinated in situ grew continuously and proportionately throughout the 120 d experimen...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jexbot/52.358.933
更新日期：2001-05-01 00:00:00
abstract：:In this study, the effect of melatonin on the postharvest ripening and quality improvement of tomato fruit was carried out. The tomatoes were immersed in exogenous melatonin for 2h, and then the related physiological indicators and the expression of genes during post-harvest life were evaluated. Compared with control ...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/eru332
更新日期：2015-02-01 00:00:00
abstract：:SU(VAR)3-9 proteins are key regulators of heterochromatin structure and function in plants, mammals, Drosophila, and yeast. In contrast to animals and fungi, plants contain numerous Su(var)3-9 homologues (SUVH), the members of which form a discrete subfamily. The SU(VAR)3-9 and SUVH proteins associate with heterochrom...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erl093
更新日期：2006-01-01 00:00:00
abstract：:Protein kinases and phosphatases are the foremost agents which take part in cell cycle regulation in both plants and other eukaryotes. Protein kinases are a very well examined group of proteins with respect to chemical structure and function. Nowadays protein phosphatases, including PP1 and PP2A belonging to the PSP f...
journal_title：Journal of experimental botany
pub_type： 杂志文章
doi：10.1093/jxb/erm148
更新日期：2007-01-01 00:00:00
