Abstract:
:That root system architecture (RSA) has an essential role in nitrogen acquisition is expected in maize, but the genetic relationship between RSA and nitrogen use efficiency (NUE) traits remains to be elucidated. Here, the genetic basis of RSA and NUE traits was investigated in maize using a recombination inbred line population that was derived from two lines contrasted for both traits. Under high-nitrogen and low-nitrogen conditions, 10 NUE- and 9 RSA-related traits were evaluated in four field environments and three hydroponic experiments, respectively. In contrast to nitrogen utilization efficiency (NutE), nitrogen uptake efficiency (NupE) had significant phenotypic correlations with RSA, particularly the traits of seminal roots (r = 0.15-0.31) and crown roots (r = 0.15-0.18). A total of 331 quantitative trait loci (QTLs) were detected, including 184 and 147 QTLs for NUE- and RSA-related traits, respectively. These QTLs were assigned into 64 distinct QTL clusters, and ~70% of QTLs for nitrogen-efficiency (NUE, NupE, and NutE) coincided in clusters with those for RSA. Five important QTLs clusters at the chromosomal regions bin1.04, 2.04, 3.04, 3.05/3.06, and 6.07/6.08 were found in which QTLs for both traits had favourable effects from alleles coming from the large-rooted and high-NupE parent. Introgression of these QTL clusters in the advanced backcross-derived lines conferred mean increases in grain yield of ~14.8% for the line per se and ~15.9% in the testcross. These results reveal a significant genetic relationship between RSA and NUE traits, and uncover the most promising genomic regions for marker-assisted selection of RSA to improve NUE in maize.
journal_name
J Exp Botjournal_title
Journal of experimental botanyauthors
Li P,Chen F,Cai H,Liu J,Pan Q,Liu Z,Gu R,Mi G,Zhang F,Yuan Ldoi
10.1093/jxb/erv127subject
Has Abstractpub_date
2015-06-01 00:00:00pages
3175-88issue
11eissn
0022-0957issn
1460-2431pii
erv127journal_volume
66pub_type
杂志文章abstract::More than 80% of land plant species benefit from symbiotic partnerships with arbuscular mycorrhizal (AM) fungi that assist in nutrient acquisition and enhance the ability of host plants to adapt to environmental constraints. Host-generated plasma membrane-residing receptor-like kinases and the α/β-hydrolases, e.g. DWA...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/eraa538
更新日期:2020-11-30 00:00:00
abstract::BRCA2 is a breast tumour susceptibility factor with functions in maintaining genome stability through ensuring efficient double-strand DNA break (DSB) repair via homologous recombination. Although best known in vertebrates, fungi, and higher plants also possess BRCA2-like genes. To investigate the role of Arabidopsis ...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erp135
更新日期:2009-01-01 00:00:00
abstract::Tonoplast intrinsic proteins (TIPs) are integral membrane proteins that are known to function in plants as aquaporins. Here, we propose another role for TIPs during the fusion of protein storage vacuoles (PSVs) in aleurone cells, a process that is promoted by gibberellic acid (GA) and prevented by abscisic acid (ABA)....
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/eru467
更新日期:2015-03-01 00:00:00
abstract::The physiological activity of exogenous 4-Cl-IAA, as compared to IAA, was examined in maize coleoptile segments. It was found that in this model system 4-Cl-IAA is much more active in the stimulation of elongation than IAA. Simultaneous measurements of growth and external pH indicated that administration of either IAA...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jexbot/53.371.1089
更新日期:2002-05-01 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::Polarized growth of pollen tubes is a critical step for successful reproduction in angiosperms and is controlled by ROP GTPases. Spatiotemporal activation of ROP (Rho GTPases of plants) necessitates a complex and sophisticated regulatory system, in which guanine nucleotide exchange factors (RopGEFs) are key components...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ert323
更新日期:2013-12-01 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::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 su...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/erq399
更新日期:2011-03-01 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::Ascorbate peroxidase (APX) exists as several isoforms that are found in various compartments in plant cells. The cytosolic and chloroplast APXs appear to play important roles in antioxidation metabolism in plant cells, yet the function of peroxisomal APX is not well studied. In this study, the localization of a putati...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erl060
更新日期:2006-01-01 00:00:00
abstract::Water is a principal limitation to agricultural production during drought and in arid regions of the world. Mechanisms that plants use to cope with drought can be grouped into two different strategies: drought tolerance and drought avoidance. Previous efforts toward engineering plants for improved performance during d...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jexbot/53.369.699
更新日期:2002-04-01 00:00:00
abstract::Manganese (Mn) is an essential micronutrient for plant growth but is often toxic in acid or waterlogged soils. Using cowpea (Vigna unguiculata L. Walp.) grown with 0.05-1500 μM Mn in solution, two short-term (48 h) solution culture experiments examined if the effects of cations (Ca, Mg, Na, Al, or H) on Mn nutrition a...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/err097
更新日期:2011-07-01 00:00:00
abstract::Although the role of the gynoecium in natural senescence of the carnation flower has long been suggested, it has remained a matter of dispute because petal senescence in the cut carnation flower was not delayed by the removal of gynoecium. In this study, the gynoecium was snapped off by hand, in contrast to previous i...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jexbot/51.353.2067
更新日期:2000-12-01 00:00:00
abstract::Nine Gretchen Hagen (GH3) genes were identified in grapevine (Vitis vinifera L.) and six of these were predicted on the basis of protein sequence similarity to act as indole-3-acetic acid (IAA)-amido synthetases. The activity of these enzymes is thought to be important in controlling free IAA levels and one auxin-indu...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/err134
更新日期:2011-08-01 00:00:00
abstract::The effect of water stress on the early seedling growth of onions was studied by placing newly-germinated seedlings in vermiculite equilibrated at different water potentials. Roots and shoots elongated more at -0.29 than at -0.64 MPa, but did not elongate at -1.66 MPa. However, roots and shoots of seedlings that had b...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jexbot/52.358.1129
更新日期:2001-05-01 00:00:00
abstract::Plastid-to-nucleus retrograde signaling plays an important role in regulating the expression of photosynthesis-associated nuclear genes (PhANGs) in accordance with physiological demands on chloroplast biogenesis and function. Despite its fundamental importance, little is known about the molecular nature of the plastid...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erv525
更新日期:2016-06-01 00:00:00
abstract::Our previous genetic analysis of a tetraploid wild wheat species, Aegilops peregrina, predicted that a single gene per haploid genome, Bgc-1, controls B-type starch granule content in the grain. To test whether bread wheat (Triticum aestivum L.) has orthologous Bgc-1 loci, we screened a population of γ-irradiated brea...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erx349
更新日期:2017-11-28 00:00:00
abstract::Since cysteine is the first committed molecule in plant metabolism containing both sulphur and nitrogen, the regulation of its biosynthesis is critically important. Cysteine itself is required for the production of an abundance of key metabolites in diverse pathways. Plants alter their metabolism to compensate for sul...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/erh136
更新日期:2004-06-01 00:00:00
abstract::Grain yield (GY) of bread wheat (Triticum aestivum L.) is quantitatively inherited. Correlated GY-syndrome traits such as plant height (PH), heading date (HD), thousand grain weight (TGW), test weight (TW), grains per ear (GPE), and ear weight (EW) influence GY. Most quantitative genetics studies assessed the multiple...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erx214
更新日期:2017-07-10 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::Axenically grown Arabidopsis thaliana plants were analysed for the occurrence of trehalose. Using gas chromatography-mass spectrometry (GC-MS) analysis, trehalose was unambiguously identified in extracts from Arabidopsis inflorescences. In a variety of organisms, the synthesis of trehalose is catalysed by trehalose-6-...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jexbot/52.362.1817
更新日期:2001-09-01 00:00:00
abstract::Plants show varied cellular responses to salinity that are partly associated with maintaining low cytosolic Na(+) levels and a high K(+)/Na(+) ratio. Plant metabolites change with elevated Na(+), some changes are likely to help restore osmotic balance while others protect Na(+)-sensitive proteins. Metabolic responses ...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erp243
更新日期:2009-01-01 00:00:00
abstract::Leaves are beautifully specialized organs designed to maximize the use of light and CO2 for photosynthesis. Engineering leaf anatomy therefore holds great potential to enhance photosynthetic capacity. Here we review the effect of the dominant leaf anatomical traits on leaf photosynthesis and confirm that a high chloro...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/ery448
更新日期:2019-02-20 00:00:00
abstract::ICE1 (Inducer of CBF Expression 1) encodes a MYC-like basic helix-loop-helix transcription factor that acts as a central regulator of cold response. In this study, we elucidated the function and underlying mechanisms of PtrICE1 from trifoliate orange [Poncirus trifoliata (L.) Raf.]. PtrICE1 was upregulated by cold, de...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erv138
更新日期:2015-06-01 00:00:00
abstract::The effects of increasing light and of a heterologous bHLH transcription factor on the accumulation of condensed tannins (CT) were investigated in leaves of Lotus corniculatus, a model legume species which accumulates these secondary metabolites in leaves as well as reproductive tissues. Light and expression of the tr...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/eri101
更新日期:2005-04-01 00:00:00
abstract::Two unlinked semi-dominant loci, A (NIC1) and B (NIC2), control nicotine and related alkaloid biosynthesis in Burley tobaccos. Mutations in either or both loci (nic1 and nic2) lead to low nicotine phenotypes with altered environmental stress responses. Here we show that the transcripts derived from the pathogenesis-re...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erw345
更新日期:2016-10-01 00:00:00
abstract::Leaf senescence involves degenerative but active biological processes that require balanced regulation of pro- and anti-senescing activities. Ethylene and cytokinin are major antagonistic regulatory hormones that control the timing and progression rate of leaf senescence. To identify the roles of these hormones in the...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ery137
更新日期:2018-05-25 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::Leghemoglobins transport and deliver O2 to the symbiosomes inside legume nodules and are essential for nitrogen fixation. However, the roles of other hemoglobins (Hbs) in the rhizobia-legume symbiosis are unclear. Several Lotus japonicus mutants affecting LjGlb1-1, a non-symbiotic class 1 Hb, have been used to study t...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erw290
更新日期:2016-09-01 00:00:00
abstract::Drought is a major abiotic stress that negatively influences crop yield. Breeding strategies for improved drought resistance require an improved knowledge of plant drought responses. We therefore applied drought to barley recombinant inbred lines and their parental genotypes shortly before tillering. A large-scale pro...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erz075
更新日期:2019-05-09 00:00:00