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@INPROCEEDINGS{Hecht:868288,
author = {Hecht, Vera Lisa and Temperton, Vicky and Nagel, Kerstin
and Rascher, Uwe and van Dusschoten, Dagmar and Postma,
Johannes Auke},
title = {{R}oot and shoot phenotypic traits and their expression in
response to sowing density in spring barley ({H}ordeum
vulgare)},
reportid = {FZJ-2019-06839},
year = {2019},
abstract = {Plants almost always grow within a population, however,
most of our knowledge of plant growth comes from plants
grown as single plants. To identify traits relevant to
field, i.e. agronomic conditions, it is critical to
investigate plants in populations and not only as single
plants. Individuals growing in the same substrate will
interact with each other within a defined volume over time.
The extent, however, to which the variability of traits,
especially root traits, in single plants and individuals in
a population differs from each other was still unclear.
Further, even less was known about sowing density effects on
the whole plant: allocation between root and shoot as a
consequence of sowing density.In my PhD, I studied the
influence of sowing density on plant shoot and root growth
and architecture. I performed various experiments (field
experiments, rhizotron experiments, one pot experiment)
using two spring barley (Hordeum vulgare L.) cultivars and
one introgression line (a cross of a German spring barley
cultivar and an Israeli wild accession). I grew the plants
as single plants and at different sowing densities and
collected data on both shoot and root. In the field
experiments, I found that sowing density affected root
length density, specific root length, tiller formation, and
yield in the field. The alterations in root traits could be
explained by changes in seminal and nodal root counts.
Further, I will discuss sowing density in the context of lab
to field translation, illustrating the challenge by a case
study. In the case study, the high tillering and high
rooting phenotype of an introgression line in comparison to
its German parent, selected in the greenhouse, was only
partly expressed in the field, depending on sowing density.},
month = {Apr},
date = {2019-04-30},
organization = {MonoGram 2019, Nottingham (United
Kingdoms), 30 Apr 2019 - 2 May 2019},
subtyp = {Invited},
cin = {IBG-2},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {582 - Plant Science (POF3-582)},
pid = {G:(DE-HGF)POF3-582},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/868288},
}