Coriander Seed Quality and Vigour Assessment as Affected by Bioregulators and Varied Irrigation Regimes Based on Climatological Approach

Abstract

The evaluation of seed quality parameters in coriander (Coriandrum sativum L.) under different irrigation regimes based on climatological approach and varied compositions of stress mitigating chemicals was carried out in the Laboratory of Seed Technology Research Unit, Department of Plant Breeding and Genetics, College of Agriculture, JNKVV Jabalpur (M.P.). The investigation consisted of four Irrigation regimes ie IW/CPE 0.6, 0.8, 1.0 and 1.2 and stress mitigating chemicals (Salicylic acid, thiourea and KNO3) with different concentrations. The experiment was laid out in Completely Randomized Design with three replicates during Rabi season (2020-21 and 2021-22). Marked influence of applied irrigation regime was exhibited by the seed lot collected from plots with IW/CPE ratio 0.8. The maximum standard germination of 82.89% was recorded in seeds from the plants which were grown in sufficient moisture content comprising of IW/CPE 1.2. Exogenous application of salicylic acid improved the seed germination parameters. The highest concentration was most effective in each treatment. Salicylic acid @ 150 ppm expressed better results. The results depicted higher test weight with 17.80g, higher plumule length of 15.75cm, radical length of 5.61 cm, seedling height of 21.36 cm, maximum magnitude 1841.64 and 28.33 of seed vigour index I & II respectively for Jawahar Dhaniya-10 was registered when the seeds harvested from plots with treatment combination of IW/CPE 0.8 along with foliar spray of salicylic acid @ 150ppm (I2C2). Higher content of 89.57% total solids was expressed under interaction of IW/CPE 0.6 with exogenous application of thiourea @ 500ppm (I1C3). Hence it can be concluded that treatment combination of IW/CPE 0.8 along with foliar spray of salicylic acid @ 150ppm (I2C2) ascertained better seed germination and quality attributes.