Genetic dissection of silicon uptake ability in rice (Oryza sativa L.)

Wu, Qi; Wei, Xun; Su, Ning; Cheng, Zixiang; Wang, J.-K.; Lei, Cailin; Zhang, X.; Jiang, Ling; Ma, Jing; Wan, Jian Min

doi:10.1016/j.plantsci.2006.05.001

Cited by 34 publications

(22 citation statements)

References 21 publications

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“…Kasalath (Table I). This result is consistent with previous findings that indica rice appears to have a lower Si concentration than japonica (Deren, 2001;Wu et al, 2006), although different varieties were used in their studies. The shoot mineral concentration might be regulated by many factors such as uptake ability, root and shoot biomass, translocation ability from the root to the shoot, transpiration rate, and so on.…”

Section: Discussionsupporting

confidence: 93%

“…A genetic study showed that genotypic variation in Si concentration in the shoot was largely additive and some heterosis was observed (Majumder et al, 1985). Recently, two studies revealed various quantitative trait loci for Si concentration and uptake in rice (Dai et al, 2005;Wu et al, 2006). However, the mechanisms responsible for the genotypic difference in Si uptake are poorly understood.…”

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confidence: 99%

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Genotypic Difference in Silicon Uptake and Expression of Silicon Transporter Genes in Rice

et al. 2007

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Rice (Oryza sativa) is a highly silicon (Si)-accumulating species that shows genotypic differences in Si accumulation. We investigated the physiological and molecular mechanisms involved in the genotypic difference in Si uptake between the japonica var. Nipponbare and the indica var. Kasalath. Both the Si concentration in the shoot and the Si uptake per root dry weight were higher in Nipponbare than in Kasalath grown in either soil or nutrient solution. The Si uptake by a single root was also higher in Nipponbare than in Kasalath. A kinetics study showed that Nipponbare and Kasalath had a similar K m value, whereas the V max was higher in Nipponbare. The expression of two Si transporter genes (Low silicon rice 1 [Lsi1] and Lsi2) investigated using real-time reverse transcription polymerase chain reaction revealed higher expression of both genes in Nipponbare than in Kasalath. Immunostaining with Lsi1 and Lsi2 antibodies revealed a similar pattern of subcellular localization of these two Si transporters in both varieties; Lsi1 and Lsi2 were localized at the distal and proximal sides, respectively, of both exodermis and endodermis of the roots. These results revealed that the genotypic difference in the Si accumulation results from the difference in abundance of Si transporters in rice roots.

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Section: Discussionsupporting

confidence: 93%

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confidence: 99%

Genotypic Difference in Silicon Uptake and Expression of Silicon Transporter Genes in Rice

et al. 2007

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“…The number of observed genotypes is the numbers of times the allele occurred in a homozygous state in the 174 lines tested a Markers that occur within 1.5 Mb or less of previously identified silica QTL's b Markers that occur within 1.5 Mb or less of previously identified additive-by-additive QTL regions c Markers that occur within 1.5 Mb or less of previously identified arsenic QTL's concentration. The mapping study performed byWu et al (2006) found a QTL for silica concentration in rice sheaths and leaves spanning a large region on chromosome 7 from 16.9 to 27.1 Mb, which is near RM1335 (chromosome 7, 28.3 Mb), the marker with the highest significance in the TX study. Similar conventional mapping studies by…”

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confidence: 87%

Genetic variation and association mapping of silica concentration in rice hulls using a germplasm collection

et al. 2011

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An association analysis on the genetic variability for silica concentration in rice hulls was performed using a "Mini-Core" set of 174 accessions representative of the germplasm diversity found in the USDA world collection of rice. Hull silica concentration was determined in replicated trials conducted in two southern states in the USA and was analyzed for its association with 164 genome-wide DNA markers. Among the accessions, the average silica concentration ranged from 120 to 251 mg g(-1). Ample variation was seen within each of the five sub-populations of rice, as well as the 14 geographic regions that the accessions originated from. There was also an effect due to location and accession × location (G × E) interaction demonstrating the importance of assessing silica concentration across multiple environments. Twelve markers on ten chromosomes were significantly associated with hull silica concentration. Six markers (RM5644, RM5371, RM1335, RM283, RM263, and RM178) corroborated quantitative trait locus for silica concentration identified in other mapping studies. Our results provide germplasm and genetic markers that will assist breeding efforts to develop cultivars that have either high or low hull silica concentration. High silica hulls are good raw material for silica based industrial compounds, while low silica hulls are more biodegradable.

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“…9). Wu et al (2006) conducted a similar experiment on silicon uptake ability using hydroponics to compare the uptake among japonica (Kinmaze) and indica (DV85) rice under three different silicon concentrations ranging from 0.16-0.4mM. He observed that silicon uptake ability of the japonica rice is higher than that of indica rice on Si-deficient soil, regardless of the silicon concentration showed through a kinetic study and the time-course experiments.…”

Section: Molecular Characterization Of Silicon Transporter Genementioning

confidence: 99%

Genotypic response of silicon uptake ability in upland varieties of indica rice (Oryza sativa L.) and in silico analysis of silicon transporter gene (Lsi2) in var. Ghanteswari.

Swain¹

2016

IJAR

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Genetic dissection of silicon uptake ability in rice (Oryza sativa L.)

Cited by 34 publications

References 21 publications

Genotypic Difference in Silicon Uptake and Expression of Silicon Transporter Genes in Rice

Genotypic Difference in Silicon Uptake and Expression of Silicon Transporter Genes in Rice

Genetic variation and association mapping of silica concentration in rice hulls using a germplasm collection

Genotypic response of silicon uptake ability in upland varieties of indica rice (Oryza sativa L.) and in silico analysis of silicon transporter gene (Lsi2) in var. Ghanteswari.

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