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@ARTICLE{Belachew:864997,
author = {Belachew, Kiflemariam Y. and Nagel, Kerstin A. and Poorter,
Hendrik and Stoddard, Frederick L.},
title = {{A}ssociation of {S}hoot and {R}oot {R}esponses to {W}ater
{D}eficit in {Y}oung {F}aba {B}ean ({V}icia faba {L}.)
{P}lants},
journal = {Frontiers in plant science},
volume = {10},
issn = {1664-462X},
address = {Lausanne},
publisher = {Frontiers Media},
reportid = {FZJ-2019-04572},
pages = {1063},
year = {2019},
abstract = {Water deficit may occur at any stage of plant growth, with
any intensity and duration. Phenotypic acclimation and the
mechanism of adaptation vary with the evolutionary
background of germplasm accessions and their stage of
growth. Faba bean is considered sensitive to various kinds
of drought. Hence, we conducted a greenhouse experiment in
rhizotrons under contrasting watering regimes to explore
shoot and root traits and drought avoidance mechanisms in
young faba bean plants. Eight accessions were investigated
for shoot and root morphological and physiological responses
in two watering conditions with four replications.
Pre-germinated seedlings were transplanted into rhizotron
boxes filled with either air-dried or moist peat. The
water-limited plants received 50-ml water at transplanting
and another 50-ml water 4 days later, then no water was
given until the end of the experimental period, 24 days
after transplanting. The well-watered plants received 100 ml
of water every 12 h throughout the experimental period.
Root, stem, and leaf dry mass, their mass fractions, their
dry matter contents, apparent specific root length and
density, stomatal conductance, SPAD value, and Fv/Fm were
recorded. Water deficit resulted in 3–4-fold reductions in
shoot biomass, root biomass, and stomatal conductance along
with 1.2–1.4-fold increases in leaf and stem dry matter
content and SPAD values. Total dry mass and apparent root
length density showed accession by treatment interactions.
Accessions DS70622, DS11320, and ILB938/2 shared relatively
high values of total dry mass and low values of stomatal
conductance under water deficit but differed in root
distribution parameters. In both treatments, DS70622 was
characterized by finer roots that were distributed in both
depth and width, whereas DS11320 and ILB938/2 produced less
densely growing, thicker roots. French accession Mélodie/2
was susceptible to drought in the vegetative phase, in
contrast to previous results from the flowering phase,
showing the importance of timing of drought stress on the
measured response. Syrian accession DS70622 explored the
maximum root volume and maintained its dry matter
production, with the difference from the other accessions
being particularly large in the water-limited treatment, so
it is a valuable source of traits for avoiding transient
drought.},
cin = {IBG-2},
ddc = {570},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {582 - Plant Science (POF3-582)},
pid = {G:(DE-HGF)POF3-582},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31552067},
UT = {WOS:000483729900001},
doi = {10.3389/fpls.2019.01063},
url = {https://juser.fz-juelich.de/record/864997},
}