Arid
DOI10.1111/nph.12786
Understanding the genetic control and physiological traits associated with rhizosheath production by barley (Hordeum vulgare)
George, Timothy S.; Brown, Lawrie K.; Ramsay, Luke; White, Philip J.; Newton, Adrian C.; Bengough, A. Glyn; Russell, Joanne; Thomas, William T. B.
通讯作者George, Timothy S.
来源期刊NEW PHYTOLOGIST
ISSN0028-646X
EISSN1469-8137
出版年2014
卷号203期号:1页码:195-205
英文摘要

There is an urgent need for simple rapid screens of root traits that improve the acquisition of nutrients and water. Temperate cereals produce rhizosheaths of variable weight, a trait first noted on desert species sampled by Tansley over 100 yr ago. This trait is almost certainly important in tolerance to abiotic stress.


Here, we screened association genetics populations of barley for rhizosheath weight and derived quantitative trait loci (QTLs) and candidate genes. We assessed whether rhizosheath weight was correlated with plant performance and phosphate uptake under combined drought and phosphorus deficiency. Rhizosheath weight was investigated in relation to root hair length, and under both laboratory and field conditions.


Our data demonstrated that rhizosheath weight was correlated with phosphate uptake under dry conditions and that the differences in rhizosheath weight between genotypes were maintained in the field. Rhizosheath weight also varied significantly within barley populations, was correlated with root hair length and was associated with a genetic locus (QTL) on chromosome 2H. Putative candidate genes were identified.


Rhizosheath weight is easy and rapid to measure, and is associated with relatively high heritability. The breeding of cereal genotypes for beneficial rhizosheath characteristics is achievable and could contribute to agricultural sustainability in nutrient-and water-stressed environments.


英文关键词abiotic stress tolerance agricultural sustainability association mapping population (AMP) calcium/calmodulin-dependent protein kinase (OsCDPK7) evergreen revolution glutamate receptor (GLR3.1) quantitative trait locus (QTL) root traits
类型Article
语种英语
国家Scotland
收录类别SCI-E
WOS记录号WOS:000336970200020
WOS关键词ARABIDOPSIS-THALIANA BRASSICACEAE ; SOIL-WATER CONTENT ; ROOT HAIR LENGTH ; PHOSPHORUS ACQUISITION ; CROP PRODUCTION ; PLANT-GROWTH ; ACID SOIL ; WILD-TYPE ; TOLERANCE ; RHIZOSPHERE
WOS类目Plant Sciences
WOS研究方向Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/183998
作者单位James Hutton Inst, Invergowrie Dundee DD2 5DA, Scotland
推荐引用方式
GB/T 7714
George, Timothy S.,Brown, Lawrie K.,Ramsay, Luke,et al. Understanding the genetic control and physiological traits associated with rhizosheath production by barley (Hordeum vulgare)[J],2014,203(1):195-205.
APA George, Timothy S..,Brown, Lawrie K..,Ramsay, Luke.,White, Philip J..,Newton, Adrian C..,...&Thomas, William T. B..(2014).Understanding the genetic control and physiological traits associated with rhizosheath production by barley (Hordeum vulgare).NEW PHYTOLOGIST,203(1),195-205.
MLA George, Timothy S.,et al."Understanding the genetic control and physiological traits associated with rhizosheath production by barley (Hordeum vulgare)".NEW PHYTOLOGIST 203.1(2014):195-205.
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