National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Present investigation was carried out in the rainout shelter at Student Instructional Farm (SIF), Narendra Deva University of Agriculture and Technology, Kumarganj, Faizabad (U.P.) during Kharif (wet season) 2015 and 2016. Experiments were laid out in randomized block design with 3 replications, one variety i.e. Swarna Sub 1and nine foliar treatments. Rice plants were exposed to drought at 60 DAT for 15 days by holding irrigation during drought treatment. During drought treatment soil moisture tension of the field was ranged from 60-80 kPa. Foliar application of different concentrations of glycine betaine (100 and 200 ppm) applied at 60 DAT and different concentrations of KNO3 (2 and 3%) applied at 30 DAT and at 60 DAT as well as their combination increased chlorophyll, proline content in leaves. Increased proline accumulation with foliar treatments during drought provides resistance against reactive oxygen species and protected the quaternary structure of proteins thus prevented oxidative damage to membranes and enhanced Antioxidative defense system under osmotic stress and ultimately produces higher test weight as compared to control with distilled water treatment and exposed to drought. However, among all the treatments, T7 (foliar spray of glycine betaine @ 200 ppm at 60 DAT) showed maximum chlorophyll content while maximum proline content and test weight found in T9(foliar spray of KNO3 @ 2% at 30 DAT and glycine betaine @ 200 ppm at 60 DAT ) during both the years. Thus, it may be concluded that combination of KNO3 @ 2% applied at 30 DAT and glycine betaine @ 200 ppm applied at 60 DAT can be used to improve test weight under drought at flowering stage in rice by enhancing proline accumulation.
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