scholarly journals Effect of elicitors on growth, biochemical and antioxidant activity in two varieties of wheat (Triticum aestivum L.) under drought

2019 ◽  
Author(s):  
Amrita Thakur ◽  
Nilima Kumari ◽  
Vinay Sharma
Keyword(s):  
Antioxidant Activity ◽  
Triticum Aestivum ◽  
Salicylic Acid ◽  
Drought Stress ◽  
Silver Nitrate ◽  
Sodium Nitroprusside ◽  
Triticum Aestivum L ◽  
Antioxidant Parameters

The study investigated the effect of different elicitors on two varieties of Triticum aestivum (10 days old seedlings) under drought stress. The growth of plants along with various biochemical and antioxidant parameters was determined on 5th, 10th and 15th day of drought stress. Six varieties of wheat viz. RAJ-4120, RAJ-4079, RAJ-3077, RAJ-4238, RAJ-4037 and RAJ-3765 were treated with different elicitors i.e. sodium nitroprusside (0.5mM), salicylic acid (10mM) and silver nitrate (10mM) for six hours before sowing and exposed to drought stress. Chemically primed seeds were sown in pots containing soil along with hydro primed seeds which were not pretreated with any chemical and were used as control. The results indicated that in all the control plants, growth of the seedlings increased with time. In drought stressed seedlings the growth was less than the control plants. Seedlings pretreated with sodium nitroprusside showed the highest growth, biochemical and antioxidant activity. Under drought stress also these parameters were higher in sodium nitroprusside pretreated plants when compared to stressed plants having no pretreatment.

scholarly journals Enhancement of drought tolerance in Triticum aestivum L. seedlings using Azospirillum brasilense NO40 and Stenotrophomonas maltophilia B11

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Wedad A. Kasim ◽  
Mohamed E. H. Osman ◽  
Mohamed N. Omar ◽  
Samar Salama
Keyword(s):  
Triticum Aestivum ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Azospirillum Brasilense ◽  
Stenotrophomonas Maltophilia ◽  
Protein Pattern ◽  
Triticum Aestivum L ◽  
Protein Patterns ◽  
Wheat Seedlings ◽  
Enhanced Production

Abstract Background The effectiveness of two PGPB; Azospirillum brasilense NO40 and Stenotrophomonas maltophilia B11 was investigated in enhancing the drought tolerance of wheat (Triticum aestivum L.) seedlings cultivar Gemiza9. The inoculated or uninoculated grains were sown in unsterilized sandy soil and watered normally untill the 8th day. Drought stress was initiated by completely withholding water for 7 days (until wilting). Samples were collected after 15 days from sowing to evaluate some growth criteria, damage and defense indicators and to analyze the roots’ protein pattern. Results The results showed that inoculating wheat seedlings with these strains significantly diminished the inhibitory effects of drought stress on the relative water content of roots, shoots and leaves; area of leaves; contents of pigments (chlorophyll a and b) and ascorbic acid; and on the protein patterns of roots. Moreover, the bacterial inoculation notably reduced the drought-induced damage indicated by lower leakage of electrolytes and less accumulation of Malondialdehyde and hydrogen peroxide, surprisingly with less enhanced production of proline and activities of catalase and peroxidase than their uninoculated counterparts. Under normal conditions, inoculating wheat plants with these PGPB resulted in significantly promoted growth and elevated contents of pigments and altered protein patterns of roots. Conclusion Overall, we can say that both Azospirillum brasilense NO40 and Stenotrophomonas maltophilia B11 were able to deactivate the growth inhibition in wheat seedlings to some extent, while maintaining a certain level of efficient protection against damage under drought stress.

Stay-green trait serves as yield stability attribute under combined heat and drought stress in wheat (Triticum aestivum L.)

2021 ◽  
Author(s):  
Rajeev Kumar ◽  
Harikrishna ◽  
Dipankar Barman ◽  
Om P. Ghimire ◽  
S. Gurumurthy ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Drought Stress ◽  
Triticum Aestivum L ◽  
Yield Stability ◽  
Stay Green
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