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@ARTICLE{Kaloterakis:904470,
author = {Kaloterakis, Nikolaos and van Delden, Sander H. and
Hartley, Sue and De Deyn, Gerlinde B.},
title = {{S}ilicon application and plant growth promoting
rhizobacteria consisting of six pure {B}acillus species
alleviate salinity stress in cucumber ({C}ucumis sativus
{L})},
journal = {Scientia horticulturae},
volume = {288},
issn = {0304-4238},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2021-06040},
pages = {110383 -},
year = {2021},
abstract = {As water quality and availability decreases in many parts
of the world, salinity is becoming a major challenge that
reduces crop yield, even in soilless cultivation systems.
Therefore, novel strategies are needed to promote plant salt
tolerance in these systems. We hypothesized that the
non-essential element silicon (Si) and plant-growth
promoting Bacillus spp. can alleviate salt stress of
cucumber (Cucumis sativus L.) grown in hydroponics. We
tested this hypothesis by growing cucumber seedlings with
and without salt stress (75 mM NaCl) and with and without
1.5 mM Si and an inoculum of six rhizosphere Bacillus
species in a full-factorial design. Seedlings were grown in
a climate room for two weeks in independent deep-water
culture containers. The applied salt stress strongly reduced
plant biomass, whereas Si application under salt stress
resulted in a substantial increase in cucumber shoot and
root biomass. This beneficial impact of Si was also observed
in increased plant height, leaf area, specific leaf area,
root length, specific root length, root surface area and
root volume. The Bacillus species increased root dry weight,
specific leaf area as well as specific root length. In
seedlings grown under salt stress, Si application increased
shoot and root Si concentration, whereas Cl− concentration
was reduced in the plant shoots. A reduction in Cl−
concentration of the shoots was also apparent in the
Bacillus treatment. Under non-stress conditions, neither Si
nor Bacillus species affected plant growth parameters.
However, shoot mineral content was affected as Si
application reduced shoot Cl−and Ca2+ concentrations, and
inoculation with Bacillus species decreased K concentration.
We conclude that Si does promote salt stress alleviation
during the early growth stage of cucumber grown in deep
water culture and this has implications for soilless crop
production. Seed inoculation with Bacillus species showed a
beneficial trend for some plant growth characteristics and
nutrient status under high salinity, although not as
pronounced as for Si.},
cin = {IBG-3},
ddc = {640},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {2173 - Agro-biogeosystems: controls, feedbacks and impact
(POF4-217)},
pid = {G:(DE-HGF)POF4-2173},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000681070500004},
doi = {10.1016/j.scienta.2021.110383},
url = {https://juser.fz-juelich.de/record/904470},
}