Abstract:
:A cDNA clone was isolated by differential hybridization from a library prepared from barley leaves inoculated with the fungus Blumeria graminis f.sp. hordei (Bgh). The open reading frame of the insert (designated HvCHS2) encoded a polypeptide with 72-79% identity to chalcone synthases (CHS) and 65-68% identity to stilbene synthases. Alignments of the amino acid sequence of HvCHS2 with the consensus sequence of naringenin-CHS (EC 2.3.1.74) reveals significant differences between HvCHS2 and naringenin-CHS. HvCHS2 transcripts accumulate strongly in barley leaves in response to inoculation with Bgh, whereas only insignificant accumulation of barley naringenin-CHS (CHS1) transcripts is seen upon the inoculation. The accumulation of HvCHS2 transcripts is also elicited by UV light. To compare the activity of HvCHS2 with the activity of CHS1, the two enzymes were expressed in Escherichia coli. Both HvCHS2 and CHS1 catalyse the formation of chalcones. However, HvCHS2 and CHS1 differ in their substrate requirements. CHS1 uses cinnamoyl-CoA and 4-coumaroyl-CoA at comparable rates whereas feruloyl-CoA is a poor substrate for this enzyme. In contrast, HvCHS2 converts feruloyl-CoA and caffeoyl-CoA at the highest rate whereas cinnamoyl-CoA is a poor substrate. Thus, HvCHS2 is a novel pathogen and UV light induces homoeriodictyol/eriodictyol CHS involved in the direct production of flavonoids possessing multi-substituted B-rings.
journal_name
Plant Mol Bioljournal_title
Plant molecular biologyauthors
Christensen AB,Gregersen PL,Schröder J,Collinge DBdoi
10.1023/a:1006031822141subject
Has Abstractpub_date
1998-07-01 00:00:00pages
849-57issue
5eissn
0167-4412issn
1573-5028journal_volume
37pub_type
杂志文章abstract::Evidence is emerging that the E2F family of transcription factors plays an important role in the regulation of gene expression at the G1/S transition in plants. Here, we show that in the tobacco proliferating cell nuclear antigen (PCNA), whose transcript is specifically expressed at G1/S phase, the two E2F binding sit...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-004-6601-x
更新日期:2005-01-01 00:00:00
abstract::Pathogenesis related-10 (PR-10) proteins are present as multigene family in most of the higher plants. The role of PR-10 proteins in plant is poorly understood. A sequence analysis revealed that a large number of PR-10 proteins possess conserved motifs found in aldo/keto reductases (AKRs) of yeast and fungi. We took t...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-015-0405-z
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1006052108468
更新日期:1998-11-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00017817
更新日期:1996-01-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-007-9204-5
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abstract::Alterations in gene expression during early stages of dormancy release in grapevine buds were analyzed to facilitate the identification of gene products that may mediate the signal transduction of a dormancy-release signal, or derepression of meristematic activity. In the present report we describe the identification ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1006450516982
更新日期:2000-07-01 00:00:00
abstract::One hundred maize zygotic embryos microdissected at the transition stage were used to construct a cDNA library after non-selective PCR (NS-PCR) amplification of whole cDNA populations. The library contains 2.3 x 10(5) recombinants and two different calmodulin cDNAs were cloned using a heterologous probe from petunia. ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00019182
更新日期:1995-01-01 00:00:00
abstract:KEY MESSAGE:Moderate overexpression of CYP734A4 improves grain number per main panicle and seed setting rate. Brassinosteroid (BR) homeostasis and signaling are crucial for plant growth and development. CYP734A genes encode cytochrome P450 monooxygenases that control the level of bioactive BRs by degrading BRs. However...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-016-0558-4
更新日期:2017-01-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00027351
更新日期:1992-05-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00019563
更新日期:1996-03-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1006146627301
更新日期:1999-01-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1013644026132
更新日期:2001-12-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00021302
更新日期:1986-01-01 00:00:00
abstract::A novel CBL-interacting protein kinase (CIPK) gene, ZmCIPK16, was isolated from maize (Zea mays), which has been certified to have two copies in the genome. The ZmCIPK16 is strongly induced in maize seedlings by PEG, NaCl, ABA, dehydration, heat and drought, but not by cold. A yeast two-hybrid assay demonstrated that ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-008-9445-y
更新日期:2009-04-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-015-0334-x
更新日期:2015-07-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-008-9379-4
更新日期:2008-11-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1006176819213
更新日期:1999-03-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-004-3249-5
更新日期:2004-09-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00039617
更新日期:1993-01-01 00:00:00
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journal_title:Plant molecular biology
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journal_title:Plant molecular biology
pub_type: 杂志文章
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更新日期:1991-01-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-005-7307-4
更新日期:2005-07-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-020-00991-3
更新日期:2020-06-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-009-9494-x
更新日期:2009-07-01 00:00:00
abstract::Plants that utilize the highly efficient C4 photosynthetic pathway possess two types of specialized leaf cells, the mesophyll and bundle sheath. In mature leaves of amaranth, a dicotyledonous C4 plant, ribulose 1,5-bisphosphate carboxylase (Rubisco) is localized specifically to the chloroplasts of bundle sheath cells,...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00015971
更新日期:1993-06-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00014494
更新日期:1992-10-01 00:00:00
abstract:KEY MESSAGE:The OsPLS2 locus was isolated and cloned by map-based cloning that encodes a Upf1-like helicase. Disruption of OsPLS2 accelerated light-dependent leaf senescence in the rice mutant of ospls2. Leaf senescence is a very complex physiological process controlled by both genetic and environmental factors, howeve...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-019-00848-4
更新日期:2019-05-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-012-9956-4
更新日期:2012-11-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00019495
更新日期:1994-12-01 00:00:00
abstract::Two hevein-like peptides from the seed of Pharbitis nil, designated Pharbitis nil antimicrobial peptide 1 (Pn-AMP1) and Pn-AMP2, had been purified previously. Both exhibit potent in vitro antifungal activity against a broad spectrum of phytopathogenic fungi. We now report the isolation of two cDNA clones, designated p...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1019864222515
更新日期:2002-10-01 00:00:00