Abstract
The research was aimed at evaluating physio-morphological and biochemical attributes of Pea (Pisum
sativum) grown under salt (NaCl) stress and by exogenous application of salicylic acid. The experiment was laid
out in petri-dishes and earthen pots with randomized complete blocks design having five replicates for each salt
and salicylic acid treatment. The seeds grown in petri-dishes were primed with saline water (120 mM NaCl) and
various levels of salicylic acid (0.1, 0.5, 1.0 mM). In the second phase of experimentation, certified variety of pea
seeds was planted in earthen pots for 15 days and irrigation was carried out by tap water. After 15 days of
growth, the seedlings are exposed to saline water treatment for further 60 days and exogenous applications of
different concentration of salicylic acid were carried out in each group of plants simultaneously. Results obtained
from this study indicate an increase in seed germination, shoot/root growth, fresh/dry mass, leaf area and
diameter of plants by salicylic acid. Data obtained strongly suggest that induction of antioxidant defense is an
important tolerance mechanism of pea plant to salt-stress. Salicylic acid improved growth of pea plants by
regulating various biochemical attributes vis., proteins and proline contents and antioxidant enzymes activities.
From commercial view-point, to induce plant resistance against both biotic and abiotic stresses, low levels of
salicylic acid might strongly be suggested to enhance plant growth and productivity in pea.
ZAHOOR AHMAD SAJID, MUHAMMAD SAFDAR, SHEZA AYAZ KHILJI. (2016) Amelioration of Salinity Stress Tolerance in Pea (Pisum sativum L.) by Exogenous Application of Salicylic Acid, Biologia – Journal of Biological Society of Pakistan, Volume 62 (I), Issue 1.
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