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SALINITY EFFECT ON
PLANT
GROWTH, PSII PHOTOCHEMISTRY
AND CHLOROPHYLL CONTENT IN SUGAR BEET (BETA VULGARIS L.) AND CABBAGE
(BRASSICA OLERACEA CAPITATA L.)
MUHAMMAD
JAMIL1*, SHAFIQ REHMAN2, and E.S. RHA1,*
Abstract:
Seedlings
of
sugar beet (Beta vulgaris L.)
and cabbage (Brassica oleracea capitata
L.)
were
grown in sand culture at salinities of
0 (control),
50,
100
and
150
mM NaCl to
determine the effect of salt on
growth,
chlorophyll fluorescence
and
chlorophyll
content.
With increasing salt concentration,
dry root and shoot weight,
fresh leaf weight and leaf area decreased significantly
whereas there were no changes in dry leaf weight and leaf
water contents.
Salinity
induced
no
effects
in
both species on
the maximal efficiency of PSII
(Fv/Fm)
photochemistry,
efficiency of excitation energy capture by open PSII reaction centres,
electron transport rate (ETR), photochemical quenching coefficient (qP),
non-photochemical quenching coefficient (qN)
and
physiological
state of the photosynthetic apparatus (Fo/Fm).
However, leaf chlorophyll
content
increased
significantly
with
increasing salt concentration both in cabbage and sugar beet.
1College
of Agriculture and Life Sciences, Sunchon National University, Suncheon
540-742, Korea
2Department
of Botany, Kohat University of Science and Technology, Kohat, NWFP,
Pakistan
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