Abstract:
:The target of rapamycin (TOR) pathway has emerged as a central hub synchronizing plant growth according to the nutrient/energy status and environmental inputs. Molecular mechanisms through which TOR promotes plant growth involve the positive regulation of transcription of cell proliferation-associated genes, mRNA translation initiation and ribosome biogenesis, to cite a few examples. Phytohormones, light, sugars, and sulfur have been found to broadly regulate TOR activity. TOR operates as a metabolic homeostat to fine-tune anabolic processes and efficiently enable plant growth under different circumstances. However, little is known about the multiple effectors that act up- and downstream of TOR. Here, we mainly discuss recent findings related to the TOR pathway in the context of plant metabolism and highlight areas of interest that need to be addressed to keep unravelling the intricate networks governing the regulation of TOR and its function in controlling biosynthetic growth.
journal_name
J Exp Botjournal_title
Journal of experimental botanyauthors
Caldana C,Martins MCM,Mubeen U,Urrea-Castellanos Rdoi
10.1093/jxb/ery459subject
Has Abstractpub_date
2019-04-15 00:00:00pages
2217-2225issue
8eissn
0022-0957issn
1460-2431pii
5306425journal_volume
70pub_type
杂志文章,评审abstract::Plants have evolved highly complex sensory mechanisms to monitor their surroundings and adapt their growth and development to the prevailing environmental conditions. The integration of information from multiple environmental cues enables the co-ordination of development with favourable seasonal conditions and, ultima...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/erh026
更新日期:2004-01-01 00:00:00
abstract::Inside chloroplasts, several abiotic stresses (including drought, high light, salinity, or extreme temperatures) induce a reduction in CO2 assimilation rates with a consequent increase in reactive oxygen species (ROS) production, ultimately leading to leaf senescence and yield loss. Photo-oxidation processes should th...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/eru086
更新日期:2014-07-01 00:00:00
abstract::In contrast to desiccation-tolerant 'orthodox' seeds, so-called 'intermediate' seeds cannot survive complete drying and are short-lived. All species of the genus Coffea produce intermediate seeds, but they show a considerable variability in seed desiccation tolerance (DT), which may help to decipher the molecular basi...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erz508
更新日期:2020-02-19 00:00:00
abstract::The adaptive capacity of long-lived organisms such as trees to the predicted climate changes, including severe and successive drought episodes, will depend on the presence of genetic diversity and phenotypic plasticity. Here, the involvement of epigenetic mechanisms in phenotypic plasticity toward soil water availabil...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erx409
更新日期:2018-01-23 00:00:00
abstract::The presence of melatonin in plants is universal. Evidence has confirmed that a major portion of the melatonin is synthesized by plants themselves even though a homologue of the classic arylalkylamine N-acetyltransferase (AANAT) has not been identified as yet in plants. Thus, the serotonin N-acetylating enzyme in plan...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/err256
更新日期:2012-01-01 00:00:00
abstract::Water transport is an integral part of the process of growth by cell expansion and accounts for most of the increase in cell volume characterizing growth. Under water deficiency, growth is readily inhibited and growth of roots is favoured over that of leaves. The mechanisms underlying this differential response are ex...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jexbot/51.350.1595
更新日期:2000-09-01 00:00:00
abstract::Abscisic acid conjugate concentrations increased in barley xylem sap under salinity, whereas it remained at a low level in the intercellular washing fluid (IWF) of barley primary leaves (Hordeum vulgare cv. Gerbel). Here it is shown that IWF contains beta-glucosidase activity which releases abscisic acid (ABA) from th...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:
更新日期:2000-05-01 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::Rutin is an antioxidant with many interesting pharmacological effects. It can also be found in buckwheat (Fagopyrum esculentum Moench). UV radiation stimulates the activity of enzymes of the phenylpropanoid pathway and there is some evidence that it influences the rutin content in plants. The aim of the present resear...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erf032
更新日期:2002-08-01 00:00:00
abstract::MicroRNAs (miRNAs) are known to regulate expression of genes under stress. We report here the deep sequencing of small RNAs expressed during control, short and prolonged heat stress and recovery. Genome-wide identification of miRNAs in tolerant (Nagina 22) and susceptible (Vandana) rice cultivars was performed in 16 s...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erx111
更新日期:2017-04-01 00:00:00
abstract::Ozone induces rapid activation of SIPK, a mitogen-activated protein kinase (MAPK) in tobacco. Through transgenic manipulation it has previously been shown that overexpression of SIPK leads to enhanced ozone-induced lesion formation with concomitant accumulation of ROS. In spite of this hypersensitive phenotype, the ef...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/eri219
更新日期:2005-08-01 00:00:00
abstract::Transient kinetics of net H+, K+, Ca2+, and Cl- fluxes were measured non-invasively, using an ion-selective microelectrode technique, for bean (Vicia faba L.) leaf mesophyll in response to 150 mM mannitol treatment. In a parallel set of experiments, changes in the plasma membrane potential and the total proline conten...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:
更新日期:2000-07-01 00:00:00
abstract::(13)C discrimination in organic matter with respect to atmospheric CO(2) (Delta(13)C) is under tight genetic control in many plant species, including the pedunculate oak (Quercus robur L.) full-sib progeny used in this study. Delta(13)C is expected to reflect intrinsic water use efficiency, but this assumption require...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erp100
更新日期:2009-01-01 00:00:00
abstract::Classical and recently found phytohormones play an important role in plant growth and development, but plants additionally control these processes through small signalling peptides. Over 1000 potential small signalling peptide sequences are present in the Arabidopsis genome. However, to date, a mere handful of small s...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/ert283
更新日期:2013-12-01 00:00:00
abstract::A cDNA clone was selected as a candidate for the catalytic subunit of phospho-pyruvate dehydrogenase phosphatase (PDP) by screening a Zea mays expressed sequence tag database with the bovine PDP deduced amino acid sequence. Both strands of the cDNA were completely sequenced. The maize clone contains an open reading fr...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:
更新日期:2001-08-01 00:00:00
abstract::Arlequin (Alq) is a gain-of-function mutant whose most relevant feature is that sepals are able to become fruit-like organs due to the ectopic expression of the ALQ-TAGL1 gene. The role of this gene in tomato fruit ripening was previously demonstrated. To discover new functional roles for ALQ-TAGL1, and most particula...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erz342
更新日期:2019-10-24 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::Understanding the mechanisms by which nutritional signals impact upon root system architecture is a key facet in the drive for greater nutrient application efficiency in agricultural systems. Cereal plants reduce their rate of lateral root emergence under inorganic phosphate (Pi) shortage; this study uses molecular an...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/eru284
更新日期:2014-09-01 00:00:00
abstract::This work introduces a new experimental method for the comprehensive description of the physiological responses to light of photosynthetic organisms. It allows the integration in a single experiment of the main established manipulative chlorophyll fluorescence-based protocols. It enables the integrated characterizatio...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erw492
更新日期:2017-02-01 00:00:00
abstract::Leaf senescence is a very important trait that limits yield and biomass accumulation of agronomic crops and reduces post-harvest performance and the nutritional value of horticultural crops. Significant advance in physiological and molecular understanding of leaf senescence has made it possible to devise ways of manip...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/eru248
更新日期:2014-07-01 00:00:00
abstract::Hydroponically grown spinach plants were deprived of an external source of sulphate after an initial period when the S-supply was sufficient. The time-course of events following this treatment was monitored. The first responses were found in the uptake and translocation of NO(3)(-) and the uptake of SO(4)(2-). The for...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:
更新日期:2001-01-01 00:00:00
abstract::Rotundone was initially identified as a grape-derived compound responsible for the peppery aroma of Shiraz wine varieties. It has subsequently been found in black and white pepper and several other spices. Because of its potent aroma, the molecular basis for rotundone formation is of particular relevance to grape and ...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erv491
更新日期:2016-02-01 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::Leaf dry mass per area (LMA) is a composite parameter relating to a suite of structural traits that have the potential to influence photosynthesis. However, the extent to which each of these traits contributes to variation in LMA and photosynthetic rates is not well understood, especially at the high end of the LMA sp...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erq128
更新日期:2010-06-01 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::Dry matter partitioning is the end result of the flow of assimilates from source organs via a transport path to the sink organs. The dry matter partitioning among the sinks of a plant is primarily regulated by the sinks themselves. The effect of source strength on dry matter partitioning is often not a direct one, but...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/47.Special_Issue.1281
更新日期:1996-08-01 00:00:00
abstract::A cDNA clone encoding a 64-amino acid type 3 metallothionein protein, designated GhMT3a, was isolated from cotton (Gossypium hirsutum) by cDNA library screening. Northern blot analysis indicated that mRNA accumulation of GhMT3a was up-regulated not only by high salinity, drought, and low temperature stresses, but also...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ern291
更新日期:2009-01-01 00:00:00
abstract::Desiccation tolerance (DT) is the crucial ability of seeds to resist desiccation. However, the regulatory mechanisms of seed DT are not fully understood. In this study, two heat shock cis-elements (HSEs) were identified in the Brassica napus galactinol synthase (BnGolS1) promoter and shown to bind the heat shock trans...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erx097
更新日期:2017-04-01 00:00:00
abstract::The genomes of many plant viruses have a coding capacity limited to <10 proteins, yet it is becoming increasingly clear that individual plant virus proteins may interact with several targets in the host for establishment of infection. As new functions are uncovered for individual viral proteins, virologists have reali...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/erv520
更新日期:2016-03-01 00:00:00
abstract::Plant nucleotide-binding domain, leucine-rich repeat receptor (NLR) proteins play important roles in recognition of pathogen-derived effectors. However, the mechanism by which plant NLRs activate immunity is still largely unknown. The paired Arabidopsis NLRs RRS1-R and RPS4, that confer recognition of bacterial effect...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erz571
更新日期:2020-03-25 00:00:00