Constant water table sub-irrigation of pots allows derivation of root weights (without physical recovery) and repeated measures of in situ growth and water use efficiencies

Hunter, M , Leong, G , Mitchell, J , Dieters, M and Fujinuma, R (2017) Constant water table sub-irrigation of pots allows derivation of root weights (without physical recovery) and repeated measures of in situ growth and water use efficiencies. Plant and Soil: international journal on plant-soil relationships, . doi:10.1007/s11104-017-3536-y


Author Hunter, M
Leong, G
Mitchell, J
Dieters, M
Fujinuma, R
Title Constant water table sub-irrigation of pots allows derivation of root weights (without physical recovery) and repeated measures of in situ growth and water use efficiencies
Journal name Plant and Soil: international journal on plant-soil relationships   Check publisher's open access policy
ISSN 1573-5036
0032-079X
Publication date 2017-12-29
Year available 2017
Sub-type Article (original research)
DOI 10.1007/s11104-017-3536-y
Open Access Status Not yet assessed
Total pages 19
Place of publication Dordrecht, Netherlands
Publisher Springer
Language eng
Subject 1111 Soil Science
1110 Plant Science
Abstract Aims: We examined novel ways of non-destructively measuring root weight, plant growth and water use efficiencies to improve the detection of treatment effects in plant phenotyping in pot culture. Method: Two genotypes each of maize, sunflower and soybean were grown in 4 L ANOVApot®s in the Twinpot Water Management System (TWMS) of a constant water table. Measurement of pot weights and pot water losses (weekly and by drip rate) over time allowed the derivation of plant biomass gain and Water Use Efficiences (WUE). The destructive harvest at 31 days provided weights of plant parts and derived estimates of fresh root weight without physical recovery. Results: Derived estimates of whole plant biomass were highly correlated with harvested whole plant dry weights (r = 0.97) and fresh shoot weights (r = 0.99), while estimates of non-recovered fresh root weights were highly correlated with harvested shoot fresh weights (r = 0.86) and recovered root fresh weights (r = 0.85). WUEs based on actual water loss and drop counts varied significantly across species and between maize cultivars. Conclusions: Constant water table plant culture in pots allows measures of roots without physical recovery, in situ crop growth and WUEs based on water losses and drip rates.
Keyword Fresh root biomass
shoot:root ratio
water use efficiency
constant water table
automation
phenotyping
drip rates
container
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Agriculture and Food Sciences
 
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Created: Tue, 02 Jan 2018, 14:14:55 EST by Ryosuke Fujinuma on behalf of School of Agriculture and Food Sciences