scholarly journals Intersectional hybridization between Oryza australiensis Domin and O. ridleyi Hook.

1992 ◽  
Vol 67 (5) ◽  
pp. 415-417
Author(s):  
Taira KATAYAMA
Keyword(s):  
Oryza Australiensis

scholarly journals Doubling genome size without polyploidization: Dynamics of retrotransposition-driven genomic expansions in Oryza australiensis, a wild relative of rice

2006 ◽  
Vol 16 (10) ◽  
pp. 1262-1269 ◽  
Author(s):  
B. Piegu ◽  
R. Guyot ◽  
N. Picault ◽  
A. Roulin ◽  
A. Saniyal ◽  
...  
Keyword(s):  
Genome Size ◽  
Wild Relative ◽  
Oryza Australiensis

Sucrose transport and metabolism control carbon partitioning between stem and grain in rice

2021 ◽  
Author(s):  
Jyotirmaya Mathan ◽  
Anuradha Singh ◽  
Aashish Ranjan
Keyword(s):  
Grain Yield ◽  
Wild Rice ◽  
Grain Filling ◽  
Invertase Activity ◽  
Cultivated Rice ◽  
Sucrose Transport ◽  
Unit Leaf ◽  
In The Wild ◽  
Source Sink ◽  
Oryza Australiensis

Abstract The source-sink relationship is key to overall crop performance. Detailed understanding of the factors that determine source-sink dynamics is imperative for the balance of biomass and grain yield in crop plants. We investigated the differences in the source-sink relationship between a cultivated rice Oryza sativa cv. Nipponbare and a wild rice Oryza australiensis that show striking differences in biomass and grain yield. Oryza australiensis, accumulating higher biomass, not only showed higher photosynthesis per unit leaf area but also exported more sucrose from leaves than Nipponbare. However, grain features and sugar levels suggested limited sucrose mobilization to the grains in the wild rice due to vasculature and sucrose transporter functions. Low cell wall invertase activity and high sucrose synthase cleavage activity followed by higher expression of cellulose synthase genes in Oryza australiensis stem utilized photosynthates preferentially for the synthesis of structural carbohydrates, resulting in high biomass. In contrast, the source-sink relationship favored high grain yield in Nipponbare via accumulation of transitory starch in the stem, due to higher expression of starch biosynthetic genes, which is mobilized to panicles at the grain filling stage. Thus, vascular features, sucrose transport, and functions of sugar metabolic enzymes explained the differences in the source-sink relationship between Nipponbare and Oryza australiensis.

Cloning and characterization of repetitive DNA sequences from genomes of Oryza minuta and Oryza australiensis

Genome ◽  
1991 ◽  
Vol 34 (5) ◽  
pp. 790-798 ◽  
Author(s):  
H. Aswidinnoor ◽  
R. J. Nelson ◽  
J. F. Dallas ◽  
C. L. McIntyre ◽  
H. Leung ◽  
...  
Keyword(s):  
Repetitive Dna ◽  
Dna Sequences ◽  
Genomic Dna ◽  
Repetitive Sequences ◽  
Rice Genome ◽  
Repetitive Dna Sequences ◽  
Cross Hybridization ◽  
Oryza Minuta ◽  
Wild Rice Species ◽  
Oryza Australiensis

The value of genome-specific repetitive DNA sequences for use as molecular markers in studying genome differentiation was investigated. Five repetitive DNA sequences from wild species of rice were cloned. Four of the clones, pOm1, pOm4, pOmA536, and pOmPB10, were isolated from Oryza minuta accession 101141 (BBCC genomes), and one clone, pOa237, was isolated from Oryza australiensis accession 100882 (EE genome). Southern blot hybridization to different rice genomes showed strong hybridization of all five clones to O. minuta genomic DNA and no cross hybridization to genomic DNA from Oryza sativa (AA genome). The pOm1 and pOmA536 sequences showed cross hybridization only to all of the wild rice species containing the C genome. However, the pOm4, pOmPB10, and pOa237 sequences showed cross hybridization to O. australiensis genomic DNA in addition to showing hybridization to the O. minuta genomic DNA.Key words: rice, genome-specific repetitive sequences, Oryza.

The whole chloroplast genome of wild rice (Oryza australiensis)

2014 ◽  
Vol 27 (2) ◽  
pp. 1062-1063 ◽  
Author(s):  
Zhiqiang Wu ◽  
Song Ge
Keyword(s):  
Chloroplast Genome ◽  
Wild Rice ◽  
Oryza Australiensis

scholarly journals RIRE1, a retrotransposon from wild rice Oryza australiensis.

1997 ◽  
Vol 72 (3) ◽  
pp. 131-140 ◽  
Author(s):  
Kenichi Noma ◽  
Reiko Nakajima ◽  
Hisako Ohtsubo ◽  
Eiichi Ohtsubo
Keyword(s):  
Wild Rice ◽  
Oryza Australiensis

scholarly journals Rapid Accumulation of Proline Enhances Salinity Tolerance in Australian Wild Rice Oryza australiensis Domin

Plants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2044
Author(s):  
Ha Thi Thuy Nguyen ◽  
Sudipta Das Bhowmik ◽  
Hao Long ◽  
Yen Cheng ◽  
Sagadevan Mundree ◽  
...  
Keyword(s):  
Salinity Stress ◽  
Wild Rice ◽  
Oryza Sativa L ◽  
Early Stage ◽  
Membrane Integrity ◽  
Free Proline ◽  
Cultivated Rice ◽  
Cell Membrane Integrity ◽  
Rapid Accumulation ◽  
Oryza Australiensis

Proline has been reported to play an important role in helping plants cope with several stresses, including salinity. This study investigates the relationship between proline accumulation and salt tolerance in an accession of Australian wild rice Oryza australiensis Domin using morphological, physiological, and molecular assessments. Seedlings of O. australiensis wild rice accession JC 2304 and two other cultivated rice Oryza sativa L. cultivars, Nipponbare (salt-sensitive), and Pokkali (salt-tolerant), were screened at 150 mM NaCl for 14 days. The results showed that O. australiensis was able to rapidly accumulate free proline and lower osmotic potential at a very early stage of salt stress compared to cultivated rice. The qRT-PCR result revealed that O. australiensis wild rice JC 2304 activated proline synthesis genes OsP5CS1, OsP5CS2, and OsP5CR and depressed the expression of proline degradation gene OsProDH as early as 1 h after exposure to salinity stress. Wild rice O. australiensis and Pokkali maintained their relative water content and cell membrane integrity during exposure to salinity stress, while the salt-sensitive Nipponbare failed to do so. An analysis of the sodium and potassium contents suggested that O. australiensis wild rice JC 2304 adapted to ionic stress caused by salinity by maintaining a low Na+ content and low Na+/K+ ratio in the shoots and roots. This demonstrates that O. australiensis wild rice may use a rapid accumulation of free proline as a strategy to cope with salinity stress.

Development and identification of synthetic interspecific hybrids between Oryza sativa and Oryza australiensis

2018 ◽  
Vol 78 (2) ◽  
pp. 174
Author(s):  
Chuandeng Yi ◽  
Dabang Hu ◽  
Jingjing Zhang ◽  
Weigang Jin ◽  
Wei Li ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Interspecific Hybrids ◽  
Oryza Australiensis
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