PHYSIOLOGICAL AND MOLECULAR BASIS OF SEED PRIMING IN LATE SOWN WHEAT (Triticum aestivum L.)
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Date
2011
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PAU Ludhiana
Abstract
Seed priming is an important physiological seed quality enhancement method. It provides a low-cost practical solution to sow seed in stress conditions. Abiotic stresses like low temperature and inadequate moisture during sowing season, many a times result in poor germination and poor plant stand leading to drop in crop yield. To harvest the full genetic potential, seeds must germinate and seedlings emerge quickly and uniformly throughout the field so that light, water and other soil nutrients may be utilized with maximum efficiency. However, this may not always happen in nature. Most of the major crops grown under stressed conditions can benefit substantially from pre- sowing seed priming treatment. In Punjab during sowing, prevailing low temperature, closure of canals or scanty rains result in poor germination and poor crop stand of late sown wheat. Therefore, keeping in view the prospects of this technique, the present investigations were undertaken to observe the effect of seed priming on different physiological and molecular parameters in late sown wheat. PBW 509 is late sown wheat (Triticum aestivum L.) variety released by Punjab Agricultural University Ludhiana. Different hydration durations applied were 8h, 12h, 16h and 18h and it was found that hydration for 16 h as well as 18 h enhanced the physiological parameters and elevated biochemical and molecular parameters. It was also observed that primed seeds after germination of 24 and 48 h indicated higher values of molecular parameters.
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