Bharali, BhagawanDutta, Alankrita2023-10-262023-10-262021https://krishikosh.egranth.ac.in/handle/1/5810199715Wheat (Triticum aestivum L.) is a major contributor of country’s food bowl; it is the staple crop of the world and second most important crop in India. Water stress is the most significant environmental stress in agriculture worldwide and improving yield under drought has become a major goal among scientists. All phases of plant growth are not equally vulnerable to water deficit. So, a laboratory experiment and a pot culture were accomplished in the Crop Physiology department of AAU, Jorhat (November 2019-March 2020), to study the effects of coconut milk (CM) and kinetin on wheat (Var-SKU-1) during physiological drought condition. The experiment consisted of 7 treatments viz. T0: Control, T1: 10%coconut milk, T2: 30%coconut milk, T3: 50%coconut milk, T4: 10ppm Kinetin, T5: 30ppm Kinetin, T6: 50ppm Kinetin, laid in CDR design with 3 replications. In the laboratory experiment, 30%CM showed the best results in germination (87%), and seed vigour index (771.2). During the pot experiment, 10ppm Kinetin showed the best results comprising of the parameters viz., leaf area at ear emergence stage (16.580 cm2/plant), tiller number per plant(8.067), effective tillers per plant (3.565), RLWC in maximum tillering stage(48.070 %), RLWC at ear emergence stage (59.857 %), SLW at maximum tillering stage(3.01 gcm-1), SLW ear emergence stage(2.909g/cm), plant height at harvest(85.857 cm), root dry weight at harvest(19.13g/plant), shoot dry weight at harvest(19.33g/plant), total chlorophyll content at maximum tillering stage(1.377 mg g -1 fw of leaf), total chlorophyll content ear emergence stage(3.477 mg g -1 fw of leaf), total carbohydrate content in grains at harvest(118.11 mg g-1 dw), total nitrogen content in grains(118.11 mg g-1 dw), nitrate reductase (NR) activity at maximum tillering stage(20.19 nmol NO2 g-1 fw of leaf hr-1), nitrate reductase (NR) activity ear emergence stage(21.97 nmol NO2 g-1 fw of leaf hr-1), proline content at ear emergence stage (30.19mg g -1 fr.wt), no of seeds per spike at harvest(31.177), length of spike(10.27cm), spike weight (1.922 g), test weight(27.967g), economic yield (0.999g/plant), biological yield(12.32g/plant), harvest Index(8.807%). 30% CM showed best results in case of leaf area at maximum tillering stage (14.154 cm2/plant) and proline content at maximum tillering stage (30.05 mg g -1 fr.wt). Moreover, 10ppm Kinetin (23) and 30% CM (4) exhibited the highest response sores among the treatments in the pot experiment.EnglishThesis