STUDIES ON EFFECT OF PRIMING TREATMENTS ON GERMINATION AND SEEDLING ESTABLISHMENT AND THEIR CORRELATION IN GUAR (CYAMOPSIS TETRAGONOLOBA L.)
ARUN KUMAR*, R. P. S. KHARB, PANKAJ K. MISHRA¹, MALA KUMARI2 AND ASHWIN B. DAHAKE3
Department of Seed Science & Technology
CCS Haryana Agricultural University,
Hisar-125 004 (Haryana), India
*(e-mail : arunphdsst@gmail.com)
(Received : 3 June 2014; Accepted : 27 June 2014)
SUMMARY
Different seed priming treatments T1 (H-D), T6 (KNO3, 0.5%) and T8 (Pseudomonas culture) enhanced germination (6.66-12.66%) in good quality seed-lot of small seeded guar variety HG-365, whereas the treatment T3 (GA3, 50 ppm), T5 (PEG-6000, -5 bar) and T7 (Rhizobium culture) improved the germination percentage (6.67-11.00%) considerably over control in good quality seed-lot of medium bold variety HG-563. The treatments T3, T5, T1 and T6 enhanced field emergence (3.83-7.5%) in good quality lot of HG-365, whereas the treatments T1 and T3 enhanced seedling establishment (SET) percentage (6.00-6.33%) over control in marginal seed lot of HG-563. Similar trend was found for field emergence index (FEI)and mean emergence time (MET) for both the varieties. The SET was found significantly and positively correlated with standard germination, vigour indices (VI-I and VI-II), accelerating ageing (AA), and FEI and negatively with MET. These parameters can be used as reliable predictors of field emergence potential and seedling establishment. Overall, the treatment T3 (GA3, 50 ppm) was found commonly superior in all variety-lot combinations, for enhancing standard germination, final field emergence and reducing the mean emergence time.
Key words: Guar, priming, standard germination, vigour indices, mean emergence time, field emergence and establishment