Performance of different plant growth regulators on yield and yield attributing traits in grape (Vitis vinifera L.) cv. Thompson Seedless
Year: 2026
Type: article
Abstract: Grape (Vitis vinifera L.) is traditionally a temperate-region crop but is also cultivated extensively in the tropical regions of India. However, production in these regions is constrained by several factors, including limited varietal adaptability, climatic variability, water scarcity, and the incidence of insect, pests, diseases and the need for the optimum use of plant growth regulators (PGRs). In the present study, ‘Performance of different plant growth regulators on yield and yield attributing traits in grape cv. Thompson Seedless’, was carried out during 2025–26 at the Horticulture Research and Extension Centre, Tidagundi (Vijayapura), Karnataka, India. The experiment comprised of ten treatments laid out in a randomized complete block design with three replications. The PGRs used were brassinosteroid, jasmonic acid, forchlorfenuron (CPPU), salicylic acid, putrescine and CPPU applied alone and in combination with other growth regulators along with an untreated control. T6 (CPPU + brassinosteroid) took the minimum number of days to veraison (91.42 days), days taken from pruning to harvest (120.47 days), the maximum number of panicles per vine (52.14), berry length (24.10 mm), berry diameter (16.57 mm), berry weight (2.56 g), bunch length (24.40 cm), bunch width (16.83 cm), bunch weight (325.00 g) and yield (16.94 kg vine−1 and 37.64 t ha−1) were also recorded in T6. The untreated control recorded the maximum number of berries per bunch (166.67) but the minimum yield (11.20 kg vine−1 and 24.00 t ha−1). CPPU + putrescine (T9) was on par with T6 for most traits. On a per-hectare basis, treatments combining CPPU with a second regulator increased yield by 50–57% over the control, compared with 26–38% for single growth regulator application.
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W7225451606