TY  - JOUR
AU  - Beig, Akram Valizadeh Ghale
AU  - Neamati, Seyyed Hossein
AU  - Tehranifar, Ali
AU  - Emami, Hojat
T1  - Evaluation of Chlorophyll Fluorescence and Biochemical Traits of Lettuce under Drought Stress and Super Absorbent or Bentonite Application
JO  - Journal of Stress Physiology & Biochemistry
Y1  - 2014
VL  - 10
IS  - 1
SP  - 301
EP  - 315
UR  - http://www.jspb.ru/issues/2014/N1/JSPB_2014_1_301-315.pdf

KW  - water  deficit  stress
KW  - synthetic  superabsorbent
KW  - natural  superabsorbent
KW  - Chlorophyll fluorescence indicators




N1  - Owner: Алексей
N1  - Added to JabRef: 2014.02.01
N2  - The  effects  of  two  superabsorbents  (natural-bentonite)  and  (synthetic-A  200)  on  the chlorophyll fluorescenceindex, proline accumulation, phenolic compounds, antioxidant activity and total carbohydrate in lettuce (Lactuca sativa L.)  was evaluated.For this purpose, a factorial experiment using completely randomized design with superabsorbents at 3 levels (0, 0.15, 0.30 w/w%),  drought  stress  at  2  levels  (60  and  100%  of  field  capacity)  and  4  replicates  was conducted.  Results  showed  that  photosystem  photochemical  efficiency  (Fv/Fm)  II  under drought stress  (60% FC) as well as  lower levels  of  bentonite  superabsorbent  polymer  reduced. The minimum and maximum  proline content were obtained in 0.3% bentonite, 100% FC and 0 benetonite,  60%  FC,  respectively.  The  lowest and  highest  phenolic  compounds  was corresponded to the highest  levels in  both  super absorbents and  control respectively , so that the  super  absorbent  and  bentonite,  reduced  phenolic  compounds  by  62.65  and  66.21% compared to control.  0  and  0.15 wt %  bentonite  in  high  drought stress (60%FC) showed the highest and  0.3 wt %  bentonite and  100% FC attained the lowest  level of  antioxidant activity . Control  bentonite treatment beds at  60% FC and  beds  containing  0.3  wt. %  bentonite  in  100% FC, showed the  lowest  and the highest  total  carbohydrate contentrespectively. Results of this study indicate  that  bentonite  can  reduce  the  negative  effects  of  drought  stress  similar to artificial super absorbent.
ER  -