Rooting Pattern and Anatomical Alteration in Roots of Sugarcane Genotypes under Waterlogged Conditions Jain Radha1,*, Singh Anshu2, Singh C.P.3, Kumar Rajeev4, Singh S.P.5, Chandra A.6, Srivastava V.K.7, Pathak A.D.8 1Head and Principal Scientist, Plant Physiology and Biochemistry Division, ICAR-Indian Institute of Sugarcane Research, Lucknow, India 2Research Assistant, Plant Physiology and Biochemistry Division, ICAR-Indian Institute of Sugarcane Research, Lucknow, India 3Chief Technical Officer, Plant Physiology and Biochemistry Division, ICAR-Indian Institute of Sugarcane Research, Lucknow, India 4Scientist, Plant Physiology and Biochemistry Division, ICAR-Indian Institute of Sugarcane Research, Lucknow, India 5Senior Scientist, Plant Physiology and Biochemistry Division, ICAR-Indian Institute of Sugarcane Research, Lucknow, India 6Principal Scientist, Plant Physiology and Biochemistry Division, ICAR-Indian Institute of Sugarcane Research, Lucknow, India 7Senior Scientific Officer, U.P. Council of Sugarcane Research, Shahjahanpur, Uttar Pradesh, India 8Director, ICAR-Indian Institute of Sugarcane Research, Lucknow, India *Corresponding author email id: radha_dinesh@yahoo.co.in
Online published on 18 January, 2019. Abstract Twenty three sugarcane genotypes consisting six commercial varieties (CoLk 94184, BO91, CoS 767, CoJ 64, CoS 97264, UP 9530) and 17 germplasm lines (CoLk 12204, CoLk 12202, CoLk 12206, CoLk 07201, CoLk 04238, LG 06605, LG 04439, LG 05350, LG 05020, LG 03040, A-46-11, B-44-12, A-27-12, D-12-9, D-6-13, S 5085/11, S 5087/11) were assessed for rooting pattern and root anatomy under waterlogged condition. Results indicated in general reduce shoot dry mass in all the genotypes. Except in CoLk94184, CoLk 12204, CoLk 12206, LG06605, LG04439, D-6-13 and S 5085/11, rest of the genotypes showed decreased shoot dry mass. However, root dry mass was observed relatively higher under waterlogged condition. Aerial rooting pattern varied among genotypes as some of the genotypes showed aerial roots up to the 12th nodes. Genotypes, namely CoLK 94184, UP 9530, CoS 97264, LG 04439, LG 05020, D-6-13, S5985/11 and S 5087/11 genotypes showed dense aerial root growth. Anatomical studies indicated cortical cell distortion and loss of uniformity in endodermis and pericycle due to waterlogging. The size of metaxylem vessel of roots declined when compared with control roots, however, number of metaxylem vessels increased in shoot roots. Correlation analysis indicated positive association of root dry mass (R2=0.655) and number of metaxylem vessel (R2=0.392) with stalk dry weight (yield contributing attribute) under waterlogging condition. Based on root attributes, seven genotypes, namely UP 9530, CoS 97264, LG 04439, LG 05020, D-6-13, S5085/11 and S 5087/11 were defined as tolerant lines exhibiting better tolerance to waterlogging. Top Key Terms Sugarcane, Waterlogging, Aerial rooting, Root anatomy, Metaxylem vessel, Root characteristics, Aerenchyma. Top |