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Salicylic acid-induced salinity tolerance in corn grown under NaCl stress

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Abstract

Effects of salicylic acid on some physiological and biochemical characteristics of maize ( Zea mays L.) seedlings under NaCl stress were studied. Pre-soaking treatments of NaCl (0, 50, 100 and 200 mM) were given to maize seeds in the presence as well as in the absence of 0.5 mM salicylic acid. Two-week-old maize seedlings exhibited significant decrease in dry weight, root length, shoot length and leaf area on 6 h exposure of 100 and 200 mM NaCl stress. Photosynthetic pigments and NR activity in leaves decreased sharply with increasing stress levels. Both proline content and lipid peroxidation (measured in terms of MDA) levels increased significantly under saline conditions. However, seedlings pretreated with 0.5 mM salicylic acid along with the salinity levels showed enhancement in growth parameters, photosynthetic pigments, NR activity while, free proline and MDA levels decreased. The results showed that salt-induced deleterious effects in maize seedlings were significantly encountered by the pretreatment of salicylic acid. It is concluded that 0.5 mM salicylic acid improves the adaptabilities of maize plants to NaCl stress.

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Acknowledgment

Shruti Gautam acknowledges the Council of Scientific and Industrial Research (CSIR), New Delhi for granting Senior Research Fellowship (Award No. 08/396(0004)/2005-EMR-1 dated 25-04-2008).

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Authors and Affiliations

  1. Department of Botany, Udai Pratap Autonomous College, Varanasi, 221002, India

    Shruti Gautam & Pramod K. Singh

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  1. Shruti Gautam
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  2. Pramod K. Singh
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Correspondence to Pramod K. Singh.

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Communicated by S. Weidner.

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Gautam, S., Singh, P.K. Salicylic acid-induced salinity tolerance in corn grown under NaCl stress. Acta Physiol Plant 31, 1185–1190 (2009). https://doi.org/10.1007/s11738-009-0338-8

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  • DOI: https://doi.org/10.1007/s11738-009-0338-8

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