Journal Article

FZJ-2016-01671

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Screening for drought tolerance of maize hybrids by multi-scale analysis of root and shoot traits at the seedling stage

Avramova, V. ; Nagel, K.FZJ* ; AbdElgawad, H. ; Bustos, D. ; DuPlessis, M. ; Fiorani, F.FZJ* ; Beemster, G. T. S. (Corresponding author)

2016
Oxford Univ. Press Oxford

This record in other databases:      

Please use a persistent id in citations: doi:10.1093/jxb/erw055

Abstract: We studied the drought response of eight commercial hybrid maize lines with contrasting drought sensitivity together with the reference inbred line B73 using a non-invasive platform for root and shoot phenotyping and a kinematics approach to quantify cell level responses in the leaf. Drought treatments strongly reduced leaf growth parameters including projected leaf area, elongation rate, final length and width of the fourth and fifth leaf. Physiological measurements including water use efficiency, chlorophyll fluorescence and photosynthesis were also significantly affected. By performing a kinematic analysis, we show that leaf growth reduction in response to drought is mainly due to a decrease in cell division rate, whereas a marked reduction in cell expansion rate is compensated by increased duration of cell expansion. Detailed analysis of root growth in rhizotrons under drought conditions revealed a strong reduction in total root length as well as rooting depth and width. This was reflected by corresponding decreases in fresh and dry weight of the root system. We show that phenotypic differences between lines differing in geographic origin (African vs. European) and in drought tolerance under field conditions can already be identified at the seedling stage by measurements of total root length and shoot dry weight of the plants. Moreover, we propose a list of candidate traits that could potentially serve as traits for future screening strategies.

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Contributing Institute(s):

1. Pflanzenwissenschaften (IBG-2)

Research Program(s):

1. 582 - Plant Science (POF3-582) (POF3-582)
2. EPPN - European Plant Phenotyping Network (284443) (284443)

Appears in the scientific report 2016

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Database coverage:
; Allianz-Lizenz / DFG ; BIOSIS Previews ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Life Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; National-Konsortium ; Nationallizenz ; No Authors Fulltext ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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