Coronal roots and stem lignin content as significant contributors for lodging tolerance in wheat (Triticum aestivum L.)

Singh, Jaspreet and Bedi, Seema and Gudi, Santosh and Kumar, Pradeep and Sharma, Achla (2023) Coronal roots and stem lignin content as significant contributors for lodging tolerance in wheat (Triticum aestivum L.). CEREAL RESEARCH COMMUNICATIONS, 51 (3). pp. 639-647. ISSN 0133-3720 (print), 1788-9170 (online)

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Abstract

Lodging is the major factor affecting the wheat production worldwide. An investigation was conducted at Punjab Agricultural University, Ludhiana, India, during the rabi seasons of 2018–19 and 2019–20 to study the traits associated with lodging tolerance. Five lodging tolerant (Iranian 58, Iranian 89, Iranian 49, Iranian 61, and Iranian 63), five lodging sensitive (Mexican 711, Mexican 717, Mexican 510, Mexican 448, and Mexican 669), and five control genotypes (PBW723, PBW725, PBW3086, PBW766, and PBW841) were laid out in randomized complete block design with 3 replications. Lodging conditions were simulated in the field by generating strong air currents with the help of pedestal fans for four consecutive days for four hours per day. The crop was subjected to lodging condition at three phenological stages, viz. maximum tillering, anthesis, and post-anthesis stage. After the formation of the basal second internode, two-tagged stems from each plot were sampled at 7-day intervals for 35 days for quantification of lignin and peroxidase activity. At maturity, plants were uprooted and observations recorded on coronal roots. It was concluded that lodging-tolerant genotypes were short in height with a lesser number of tillers and also recorded higher values for coronal root traits, culm lignin content, peroxidase activity, and yield attributes.

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