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

doi:10.1016/j.plantsci.2006.05.001

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	Genetic dissection of silicon uptake ability in rice (Oryza sativa L.)
	Wu, Q. -S.; Wan, X. -Y.; Su, N.; Cheng, Z. -J.; Wang, J. -K.; Lei, C. -L.; Zhang, X.; Jiang, L.; Ma, J. -F.; Wan, J. -M.
刊名	PLANT SCIENCE
	2006
卷号	171 期号:4 页码:441-448
关键词	rice (Oryza sativa L.) Si uptake recombinant inbred lines (RILs) quantitative trait locus (QTL)
ISSN号	0168-9452
DOI	10.1016/j.plantsci.2006.05.001
通讯作者	Wu, Q. -S.
英文摘要	The adequate presence of silicon (Si) in rice plants can enhance their yield and improve their tolerance to various biotic and abiotic stresses. In this study Si uptake abilities were compared between the japonica rice cultivar (cv.) Kinmaze and the indica rice cv. DV85 under three Si concentrations (0.16, 0.4, and 1.6 mM) at different time points from 1 to 12 h. The results showed that the phenotypic values of two traits-Si uptake by individual plants (SP, Si uptake by all roots of a plant) and Si uptake per unit root dry weight (SR = SP/root dry weight)-of Kinmaze were significantly higher than those of DV85 (P < 0.01). Meanwhile, a kinetic study indicated that the Si transporters in Kinmaze and DV85 had the same affinity for silicic acid, but with different V-max values, indicating that Kinmaze had more Si transporters in the roots than DV85. This may be the main reason for the difference in Si uptake ability between Kinmaze and DV85. In addition, a mapping population consisting of 81 recombinant inbred lines (RILs) derived from the cross between Kinmaze and DV85 was used to detect quantitative trait loci (QTLs) underlying SP and SR. The RILs follow a continuous one-peak distribution and show transgressive segregation in both directions for SP, SR, and root dry weight (RDW). Three QTLs for SP, four for SR, and three for RDW were detected. This can explain 7.16-17.15% of the phenotypic variation (PVE). Thus, the results obtained in this study provide a better understanding of the mechanism of rice Si uptake ability and the basis for fine-mapping the genes involved. (c) 2006 Elsevier Ireland Ltd. All rights reserved.
学科主题	Biochemistry & Molecular Biology ; Plant Sciences ; BIOCHEMISTRY & MOLECULAR BIOLOGY ; PLANT SCIENCES
语种	英语
出版者	ELSEVIER IRELAND LTD
WOS记录号	WOS:000240158500002
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/5715]
专题	作物科学研究所
作者单位	(1)Nanjing Agr Univ, Jiangsu Plant Gene Engn Res Ctr, Natl Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China;(2)Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China;(3)Okayama Univ, Bioresources Res Inst, Kurashiki, Okayama 7100046, Japan
推荐引用方式 GB/T 7714	Wu, Q. -S.,Wan, X. -Y.,Su, N.,et al. Genetic dissection of silicon uptake ability in rice (Oryza sativa L.)[J]. PLANT SCIENCE,2006,171(4):441-448.
APA	Wu, Q. -S..,Wan, X. -Y..,Su, N..,Cheng, Z. -J..,Wang, J. -K..,...&Wan, J. -M..(2006).Genetic dissection of silicon uptake ability in rice (Oryza sativa L.).PLANT SCIENCE,171(4),441-448.
MLA	Wu, Q. -S.,et al."Genetic dissection of silicon uptake ability in rice (Oryza sativa L.)".PLANT SCIENCE 171.4(2006):441-448.