| 285 matches found in 115 documents. Search time: 0.006 seconds. |
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Score: 1.00 |
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| | Author: van der Knaap E Song WY Ruan DL Sauter M Ronald PC Kende H | | Journal: Plant Physiol .
Citation: V : 120 ( 2 ) P : 559-70 Year: 1999 | | Literature: oryza Field: abstract Doc ID: pub10364408 Accession (PMID): 10364408 | | Abstract: We identified in deepwater rice ( Oryza sativa L ) a gene encoding a leucine-rich repeat receptor-like transmembrane protein kinase , OsTMK ( O sativa transmembrane kinase ) .
The transcript levels of OsTMK increased in the rice internode in response to gibberellin .
Expression of OsTMK was especially high in regions undergoing cell division and elongation .
The kinase domain of OsTMK was enzymatically active , autophosphorylating on serine and threonine residues .
A cDNA encoding a rice ortholog of a kinase-associated type 2C protein phosphatase ( OsKAPP ) was cloned .
KAPPs are putative downstream components in kinase-mediated signal transduction pathways .
The kinase interaction domain of OsKAPP was phosphorylated in vitro by the kinase domain of OsTMK .
RNA gel-blot analysis indicated that the expression of OsTMK and OsKAPP was similar in different it issues of the rice plant .
In protein-binding assays , OsKAPP interacted with a receptor-like protein kinase , RLK5 of Arabidopsis , but not with the protein kinase domains of the rice and maize receptor-like protein kinases Xa21 and ZmPK1 , respectively . | | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
Score: 7.00 |
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| | Author: Century KS Lagman RA Adkisson M Morlan J Tobias R Schwartz K Smith A Love J Ronald PC Whalen MC .
| | Journal: Plant J Citation: V : 20 ( 2 ) P : 231-6 Year: 1999 | | Literature: oryza Field: abstract Doc ID: pub10571882 Accession (PMID): 10571882 | | Abstract: The rice resistance gene Xa21 confers resistance against the bacterial pathogen Xanthomonas oryzae pv . oryzae ( Xoo ) .
The molecular genetic mechanism controlling the integration of the Xa21-mediated disease resistance response with the developmental program in rice is under study in this model system .
Reproducible means of infecting plants at certain developmental stages were designed based on the timing of full expansion of the leaf .
Xa21-resistance progressively increases from the susceptible juvenile leaf 2 stage through later stages , with 100% resistance at the adult leaf 9/10 stage .
We found that Xa21 expression is independent of plant developmental stage , infection with Xoo , or wounding .
Expression of the Xa21 gene transcript is not correlated with expression of Xa21 disease resistance indicating that the developmental regulation of Xa21-resistance is either controlled post-transcriptionally or by other factors . | | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
Score: 1.00 |
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| | Author: He Z Wang ZY Li J Zhu Q Lamb C Ronald P Chory J | | Journal: Science Citation: V : 288 ( 5475 ) P : 2360-3 Year: 2000 | | Literature: oryza Field: abstract Doc ID: pub10875920 Accession (PMID): 10875920 | | Abstract: An assay was developed to study plant receptor kinase activation and signaling mechanisms .
The extracellular leucine-rich repeat ( LRR ) and transmembrane domains of the Arabidopsis receptor kinase BRI1 , which is implicated in brassinosteroid signaling , were fused to the serine/threonine kinase domain of XA21 , the rice disease resistance receptor .
The chimeric receptor initiates plant defense responses in rice cells upon treatment with brassinosteroids .
These results , which indicate that the extracellular domain of BRI1 perceives brassinosteroids , suggest a general signaling mechanism for the LRR receptor kinases of plants .
This system should allow the discovery of ligands for the LRR kinases , the largest group of plant receptor kinases . | | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
Score: 3.00 |
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| | Author: Zhao B Wang WM Zheng XW Wang CL Ma BJ Xue QZ Zhu LH Zhai WX .
| | Journal: Sheng Wu Gong Cheng Xue Bao Citation: V : 16 ( 2 ) P : 137-41 Year: 2000 | | Literature: oryza Field: abstract Doc ID: pub10976312 Accession (PMID): 10976312 | | Abstract: Agrobacterium-mediated transformation of two-line genic male sterile Indica rice variety Peiai 64S was conducted using a cloned gene , Xa21 , as the foreign gene and mature embryo calli as the recipients .
A total of 46 transgenic plants had been obtained .
The PCR analysis and Southern blotting showed the integration of Xa21 gene into the genome the transgenic plants .
Results of inoculation with philippine race 6 of Xanthomonas oryzae pv . oryzae indicated that most of transgenic plants obtained high resistance to rice bacterial blight disease ( Xoo ) .
Analyses of T1 plants of the tested transgenic lines showed that integrated Xa21 gene could be steadily inherited and segregated in a 3 : 1 ratio . | | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
Score: 1.00 |
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| | Author: He ZH Dong HT Dong JX Li DB Ronald PC .
| | Journal: Mol . Gen . Genet . Citation: V : 264 ( 1-2 ) P : 2-10 Year: 2000 | | Literature: oryza Field: abstract Doc ID: pub11016827 Accession (PMID): 11016827 | | Abstract: A rice transcript , Rim2 , was identified that accumulated in both incompatible and compatible interactions between rice and Magnaporthe grisea .
The Rim2 transcript also accumulated in response to treatment with a cell wall elicitor derived from M grisea .
A 3 . 3-kb RIM2 cDNA clone was isolated and is predicted to encode a protein of 653 amino acids , which shares 32 55% identity with TNP2-like proteins encoded by CACTA transposons of other plants .
A 1 . 05-kb segment of the Rim2 sequence shows 82% nucleotide sequence identity with sequences flanking the A1 and C members of the rice Xa21 disease resistance gene family .
The 5-upstream region of Rim2 was cloned and the transcriptional start sites were identified .
The 5 and 3 noncoding termini of Rim2 are AT-rich .
A cis-element showing similarity to a sequence that mediates defense-associated transcriptional activation of the tobacco retrotransposon Tnt1 , and four motifs that fit the consensus sequence of the elicitor-responsive elements in the promoters of the parsley PR-1 genes were found in the 5-upstream region .
Four imperfect tandem repeats were identified in the 3 noncoding terminus .
Southern analysis with genomic DNA from different rice species indicated that Rim2 is present in 3-4 copies per genome .
These results suggest that Rim2 may be one component of a large CACTA-like element , whose transcript accumulates in response to attack by pathogens . | | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
