الفهرس 
Vegetative Growth and growth analysesOnly 14 pages are availabe for public view
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Abstract
Two field experiments were carried out in the private farm at
Khatatba, Minufiya Governorate, during the winter seasons of
(2016, 2017) and (2017, 2018), to investigate the potentialities of
nanobiostimulators contained seaweeds, salicylic acid, proline, CPPU,
BR, Si also JA on a number of physiological suspects of tomato plants
(Solanum lycopersicum) under low temperature to determine the extent to
who is these nanobiostimulators can a meliorate the adverse effects of
chilling temperature to achieve the high quantity and quality of yield
under chilling stress condition.
Nine treatments were maintained i.e untreated plants (Cont.), NB1
with two concentrations (NB1-1:0.5 ml\ L) and (NB1-2:1.0 ml\ L), NB2
with two concentrations (NB2-1:0.5 ml\ L) and (NB2-2: 1.0 ml\ L), JA with
two concentrations (JA1:5 ppm) and (JA2: 10 ppm), as well as Si with two
concentrations (Si1:2 mM) and (Si2: 3 mM) with three replications for
each treatment.
Foliar spray was given to tomato seedling grown under low
temperature was started at 45 DAT and repeated 3 times each 15 days
intervals and samples were taken at 60, 75 and 90 DAT.
On the basis of present investigation, it was concluded that low
temperature caused significant reduction in plant height, leaves and
branches fresh and dry weight, leaf area. Chilling also results in alteration
in plant metabolism as well as loss of yield. The present study indicated
that foliar sprayed NB2, NB1 and Si caused a number of physiological and
biochemical changes in tomato plants, including increased content of
chlorophyll, antioxidants enzymes and proline content, sugars, phenols
and N, P and K content.