About Textpresso Categories/Ontology Copyright Downloads Feedback Home Query Language Search User Guide
Enter keyword(s) and/or category/ies. Selecting categories for a query makes a search more specific. For example, you can retrieve sentences that contain the word HSN and a Oryza sativa gene name by typing the keyword 'SPW1' and choosing the category 'gene (Oryza sativa)'. A category hit occurs when a particular word or phrase in the sentence is defined as a member of a particular category. Categories will be concatenated by a Boolean 'and' operation to other categories and keyword(s) if present. To search for terms in categories, click on the Categories/Ontology link above.
Keywords
Separate multiple, required keywords by white spaces (Boolean 'and').
Separate multiple, alternative keywords by a comma with no white spaces (Boolean 'or').
Enter phrases in double quotes, and put a '-' sign in front of words which are to be excluded.
Keyword Specification
AND/OR
Categories
Fields
Search Scope
Search Mode
Sort by
 
Narrow your search results with filter:
Put a '+' sign in front of words which have to be included, a '-' sign in front of words which have to be excluded. Enter the field of the word, viz author, title, year, journal, abstract, type or sentence in square brackets. Enter phrases in double quotes.
For example, to find all the papers in the search result that have Jack as author, but not John, enter +Jack-John[author]. To exclude all papers that have the phrase double mutant in title, enter -"double mutant"[title]. You can combine several filters and enter something like +Jack-John[author] -"double mutant"[title] +1994[year] -review[type].
Click on Filter! button to activate the filter.

Goto:
of 1
Display options:
author: on | off accession: on | off type: on | off abstract: on | off title: on | off
citation: on | off journal: on | off year: on | off supplementals: on | off textlinks: on | off
searchterm-highlighting: on | off matching sentences: none 1 5 10 entries/page: 5 10 20 50
6 matches found in 4 documents. Search time: 0.49 seconds.
Global links/files: all results in endnote all results in print version
Score: 5.00
Title: The SHOOT ORGANIZATION2 gene coordinates leaf domain development along the central-marginal axis in rice .
Author: Itoh J Sato Y Nagato Y
Journal: Plant Cell Physiol Citation: V : 49 P : 1226-36 Year: 2008 Type: In-Process
Literature: oryza Field: abstract Doc ID: pub18596062 Accession (PMID): 18596062
Abstract: We describe how rice leaves are regionalized and regulated along the central-marginal axis . The shoot organization2 ( sho2 ) mutant , a weak allele of SHOOTLESS4 that is a ZIPPY/ARGONAUTE7 homolog in rice , shows a variety of leaf abnormalities ; filamentous leaves , bi or trifurcated leaves , separation of the filamentous structure from the leaf blade or deletion of the margin . All of these phenotypes can be interpreted as combinatorial defects in the growth of the central , lateral and marginal domains along the central-marginal axis , on the condition that the growth of the central domain is predominant . The leaf founder cells for the lateral and marginal domains are recruited normally in sho2 , indicating that sho2 is defective in the growth of leaf domains after the founder cells are recruited . The expression pattern of SHO2 in the outer layer of the shoot apical meristem and the adaxial surface of the leaf , as well as the altered expression of HD-ZIP III and ETTIN homologs in the central domain of sho2 leaves , suggest that normal development of the central domain is a prerequisite for the synchronous growth of the three domains . This synchrony is thought to be mediated by a small interfering RNA-dependent process .
Matching Sentences:
[ Sen. 4, subscore: 2.00 ]: The leaf founder cells for the lateral and marginal domains are recruited normally in sho2 , indicating that sho2 is defective in the growth of leaf domains after the founder cells are recruited .
[ Sen. 5, subscore: 2.00 ]: The expression pattern of SHO2 in the outer layer of the shoot apical meristem and the adaxial surface of the leaf , as well as the altered expression of HD-ZIP III and ETTIN homologs in the central domain of sho2 leaves , suggest that normal development of the central domain is a prerequisite for the synchronous growth of the three domains .
[ Sen. 2, subscore: 1.00 ]: The shoot organization2 ( sho2 ) mutant , a weak allele of SHOOTLESS4 that is a ZIPPY/ARGONAUTE7 homolog in rice , shows a variety of leaf abnormalities ; filamentous leaves , bi or trifurcated leaves , separation of the filamentous structure from the leaf blade or deletion of the margin .
Supplemental links/files: reference in endnote online text related articles pubmed citation
Score: 1.00
Title: Shoot organization genes regulate shoot apical meristem organization and the pattern of leaf primordium initiation in rice .
Author: Itoh JI Kitano H Matsuoka M Nagato Y
Journal: Plant Cell Citation: V : 12 ( 11 ) P : 2161-74 Year: 2000 Type: ARTICLE
Literature: oryza Field: abstract Doc ID: pub11090216 Accession (PMID): 11090216
Abstract: The mechanism regulating the pattern of leaf initiation was analyzed by using shoot organization ( sho ) mutants derived from three loci ( SHO1 , SHO2 , and SHO3 ) . In the early vegetative phase , sho mutants show an increased rate of leaf production with random phyllotaxy . The resulting leaves are malformed , threadlike , or short and narrow . Their shoot apical meristems are relatively low and wide , that is , flat shaped , although their shape and size are highly variable among plants of the same genotype . Statistical analysis reveals that the shape of the shoot meristem rather than its size is closely correlated with the variations of plastochron and phyllotaxy . Rapid and random leaf production in sho mutants is correlated with the frequent and disorganized cell divisions in the shoot meristem and with a reduction of expression domain of a rice homeobox gene , OSH1 . These changes in the organization and behavior of the shoot apical meristems suggest that sho mutants have fewer indeterminate cells and more determinate cells than wild type , with many cells acting as leaf founder cells . Thus , the SHO genes have an important role in maintaining the proper organization of the shoot apical meristem , which is essential for the normal initiation pattern of leaf primordia .
Matching Sentences:
[ Sen. 1, subscore: 1.00 ]: The mechanism regulating the pattern of leaf initiation was analyzed by using shoot organization ( sho ) mutants derived from three loci ( SHO1 , SHO2 , and SHO3 ) .
Supplemental links/files: reference in endnote online text related articles pubmed citation
Score: 1.00
Title: The small interfering RNA production pathway is required for shoot meristem initiation in rice .
Author: Nagasaki H Itoh J Hayashi K Hibara K Satoh-Nagasawa N Nosaka M Mukouhata M Ashikari M Kitano H Matsuoka M Nagato Y Sato Y
Journal: Proc Natl Acad Sci U S A Citation: V : 104 P : 14867-71 Year: 2007 Type: MEDLINE
Literature: oryza Field: abstract Doc ID: pub17804793 Accession (PMID): 17804793
Abstract: The shoot apical meristem ( SAM ) is a group of stem cells that are responsible for plant development . Mutations in rice SHOOTLESS2 ( SHL2 ) , SHL4/SHOOT ORGANIZATION2 ( SHO2 ) , and SHO1 cause complete deletion or abnormal formation of the SAM . In this study we showed that defects in SAM formation in shl mutants are associated with the loss of expression of the homeodomain-leucine zipper ( HD-ZIPIII ) family genes . Rice SHL2 , SHL4/SHO2 , and SHO1 encoded orthologues of Arabidopsis RNA-dependent RNA polymerase 6 , ARGONAUTE ( AGO ) 7 , and DICER-like 4 , respectively , whose mutations affect leaf development through the trans-acting siRNA ( ta-siRNA ) pathway . This suggested that the ta-siRNA pathway regulates the critical step of SAM formation during rice embryogenesis . The gain-of-function experiment by the ectopic expression of SHL4 resulted in reduced accumulation of an microRNA , miR166 , and partial adaxialization of leaves , supporting a role for the ta-siRNA pathway in the maintenance of leaf polarity as previously reported in maize . Analysis of the spatiotemporal expression patterns of HD-ZIPIII and miR166 in wild-type and shl mutant embryos suggested that the loss of HD-ZIPIII expression in the SAM region of the developing embryo is the result of ectopic expression of miR166 . Our analysis of shl mutants demonstrated that HD-ZIPIII expression regulated by miR166 is sensitive to the ta-siRNA pathway during SAM formation in rice embryogenesis .
Matching Sentences:
[ Sen. 2, subscore: 1.00 ]: Mutations in rice SHOOTLESS2 ( SHL2 ) , SHL4/SHOOT ORGANIZATION2 ( SHO2 ) , and SHO1 cause complete deletion or abnormal formation of the SAM .
Supplemental links/files: reference in endnote online text related articles pubmed citation
Score: 1.00
Title: WAVY LEAF1 , an ortholog of Arabidopsis HEN1 , regulates shoot development by maintaining MicroRNA and trans-acting small interfering RNA accumulation in rice .
Author: Abe M Yoshikawa T Nosaka M Sakakibara H Sato Y Nagato Y Itoh J
Journal: Plant Physiol Citation: V : 154 P : 1335-46 Year: 2010 Type: MEDLINE
Literature: oryza Field: abstract Doc ID: pub20805329 Accession (PMID): 20805329
Abstract: In rice ( Oryza sativa ) , trans-acting small interfering RNA ( ta-siRNA ) is essential for shoot development , including shoot apical meristem ( SAM ) formation and leaf morphogenesis . The rice wavy leaf1 ( waf1 ) mutant has been identified as an embryonic mutant resembling shoot organization1 ( sho1 ) and sho2 , homologs of a loss-of-function mutant of DICER-LIKE4 and a hypomorphic mutant of ARGONAUTE7 , respectively , which both act in the ta-siRNA production pathway . About half of the waf1 mutants showed seedling lethality due to defects in SAM maintenance , but the rest survived to the reproductive phase and exhibited pleiotropic phenotypes in leaf morphology and floral development . Map-based cloning of WAF1 revealed that it encodes an RNA methyltransferase , a homolog of Arabidopsis ( Arabidopsis thaliana ) HUA ENHANCER1 . The reduced accumulation of small RNAs in waf1 indicated that the stability of the small RNA was decreased . Despite the greatly reduced level of microRNAs and ta-siRNA , microarray and reverse transcription-polymerase chain reaction experiments revealed that the expression levels of their target genes were not always enhanced . A double mutant between sho and waf1 showed an enhanced SAM defect , suggesting that the amount and/or quality of ta-siRNA is crucial for SAM maintenance . Our results indicate that stabilization of small RNAs by WAF1 is indispensable for rice development , especially for SAM maintenance and leaf morphogenesis governed by the ta-siRNA pathway . In addition , the inconsistent relationship between the amount of small RNAs and the level of the target mRNA in waf1 suggest that there is a complex regulatory mechanism that modifies the effects of microRNA/ta-siRNA on the expression of the target gene .
Matching Sentences:
[ Sen. 2, subscore: 1.00 ]: The rice wavy leaf1 ( waf1 ) mutant has been identified as an embryonic mutant resembling shoot organization1 ( sho1 ) and sho2 , homologs of a loss-of-function mutant of DICER-LIKE4 and a hypomorphic mutant of ARGONAUTE7 , respectively , which both act in the ta-siRNA production pathway .
Supplemental links/files: reference in endnote online text related articles pubmed citation
Goto:

© Textpresso Thu Mar 28 17:02:44 2024 .