INFLUENCE OF NATURAL AND SYNTHETIC CYTOKININ ON PHYSIOLOGICAL AND YIELD CONTRIBUTING PARAMETERS OF WHEAT (Triticum aestivum L.)

Nidhi Kaushal; S.K.Thind

Volume : V, Issue : VII, July - 2016

INFLUENCE OF NATURAL AND SYNTHETIC CYTOKININ ON PHYSIOLOGICAL AND YIELD CONTRIBUTING PARAMETERS OF WHEAT (Triticum aestivum L.)

Nidhi Kaushal, S. K. Thind

Abstract :

A field experiment was conducted at the experimental area of Department of Botany, Punjab Agriculture University, Ludhiana during rabi seasons of 2014 and 2015 on two wheat (Triticum aestivum L.) cultivars (PBW 621 and HD 2967) in a randomized block design with three replications. Foliar application of Benzylaminopurine (BAP) and Kinetin (Kn) @ 10�g/ml and 20�g/ml was given separately at maximum tillering and boot leaf stages. BAP and Kn application increased the net photosynthetic rate in flag leaves of selected cultivars when applied at both stages but increase was more when given at maximum tillering stage. In control, photosynthetic rate was recorded more in HD 2967 as compared with PBW 621. Application at boot leaf stage did not promote photosynthetic parameter further. Grain weight per spike increased with Kn application and maximum value was recorded when applied with Kn at 10�g/ml. Grain weight per plant increased significantly with the individual application of BAP and Kn, the effect was more pronounced when given at tillering stage. Biological yield per meter square increased with the lower concentration of BAP application in both the cultivars and with increase in concentration of BAP no further increase in biological yield was observed. Kn application at 10�g/ml improved the yield more as compared with BAP. Thus it can be concluded that application of lower concentration (10�g/ml) of both BAP and Kn at maximum tillering stage improved biological yield in selected wheat cultivars and Kn was more effective.