Boron-toxicity tolerance in barley arising from efflux transporter amplification

被引：309

作者：

Sutton, Tim ^{[1
]}

Baumann, Ute ^{[1
]}

Hayes, Julie ^{[1
]}

Collins, Nicholas C. ^{[1
]}

Shi, Bu-Jun ^{[1
]}

Schnurbusch, Thorsten ^{[1
]}

Hay, Alison ^{[1
]}

Mayo, Gwenda ^{[1
]}

Pallotta, Margaret ^{[1
]}

Tester, Mark ^{[1
]}

Langridge, Peter ^{[1
]}

机构：

[1] Univ Adelaide, Sch Agr Food & Wine, Australian Ctr Plant Funct Genom, Glen Osmond, SA 5064, Australia

来源：

SCIENCE | 2007年 / 318卷 / 5855期

关键词：

D O I：

10.1126/science.1146853

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Both limiting and toxic soil concentrations of the essential micronutrient boron represent major limitations to crop production worldwide. We identified Bot1, a BOR1 ortholog, as the gene responsible for the superior boron-toxicity tolerance of the Algerian barley landrace Sahara 3771 (Sahara). Bot1 was located at the tolerance locus by high-resolution mapping. Compared to intolerant genotypes, Sahara contains about four times as many Bot1 gene copies, produces substantially more Bot1 transcript, and encodes a Bot1 protein with a higher capacity to provide tolerance in yeast. Bot1 transcript levels identified in barley tissues are consistent with a role in limiting the net entry of boron into the root and in the disposal of boron from leaves via hydathode guttation.

引用

页码：1446 / 1449

页数：4

共 26 条

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