~ 1400 ~ Journal of Pharmacognosy and Phytochemistry 2020; 9(5): 1400-1403 E-ISSN: 2278-4136 P-ISSN: 2349-8234 www.phytojournal.com JPP 2020; 9(5): 1400-1403 Received: 15-06-2020 Accepted: 06-08-2020 Shriya Rai Ph.D. Scholar (Vegetable Science) Department of Horticulture, College of Agriculture, Gwalior, Madhya Pradesh, India Dr. Karan Vir Singh Scientist (Horticulture) Directorate of Extension Services R.V.S.K.V.V, Gwalior, Madhya Pradesh, India Dr. Arjun Kashyap Assistant Professor (Contractual) Department of Horticulture, College of Agriculture, Gwalior, Madhya Pradesh, India Priyanka Gangale Ph.D. Scholar (Vegetable Science) Department of Horticulture, College of Agriculture, Gwalior, Madhya Pradesh, India Corresponding Author: Shriya Rai Ph.D. Scholar (Vegetable Science) Department of Horticulture, College of Agriculture, Gwalior, Madhya Pradesh, India Influence of PGRs, sowing time and varieties on growth of coriander (Coriandrum sativum L.) Shriya Rai, Dr. Karan Vir Singh, Dr. Arjun Kashyap and Priyanka Gangale Abstract The present investigation entitled “Influence of PGRs, sowing time and varieties on growth of coriander (Coriandrum sativum L.)” The present experiment was laid out in the experimental field of department of Horticulture, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior (M.P.) during first year (2018 – 19), second year (2019 – 20) and pooled with 24 treatment combinations that were laid out in split plot design and replicated three times. Sowing time and varieties were assigned to main plots whereas, plant growth regulators to sub plots. The observations were recorded on different aspects of plant height at 30, 60 and 90 DAS, number of primary and secondary branches of plant, number of node per plant at harvest, fresh weight of leaves at 45, 90 DAS and at harvest and dry matter accumulation. The result of experiment revealed that the D1 (last week of December) significantly improved growth parameters among all the date of sowing D2 (first week of January) and variety V1 (RCr-41) was significantly always affected the all growth parameters, whereas PGRs T3 (Thiourea @ 1000 ppm) enhanced all the growth parameters at different growth stages. Keywords: PGRs, sowing time, varieties, growth and coriander Introduction Coriander (Coriandrum sativum L.) popularly known as “Dhania” is one of the oldest seed spices used by the mankind. It is the most widely used condiment throughout the world. It is mainly grown for its aromatic and fragrant seed which is botanically a cremocarpic fruit. The fresh green stem leaves and fruits of coriander have a pleasant aromatic odour. The pleasant aroma in the plant is due to an essential oil called ‘coriandrol’ ranges from 0.1 to 1.3 per cent in dry seeds. The oil of coriander seeds is a valuable ingredient in perfumes, cosmetic products, soup, candy, cocoa, chocolate, meat products, soft drinks and alcoholic beverages. Good quality oleoresin can be extracted from coriander seed which is used for flavouring beverages, sweets, pickles, sausages, snacks, etc. Coriander bark oil has high germicidal activity and can be used as fungicide (Krishna, 1999) [12] . The entire young plant is used for flavouring curried dishes of all sorts and chutney. Coriander leaves are also rich source of vitamin C (125-250 mg/100g) and vitamin A (5200 IU/100 g). In medicines, its seed is used as a carminative, refrigerant and diuretic. The dry seeds of coriander contain 0.3 per cent essential oil, 19.6 per cent non-volatile oil, 24 per cent carbohydrates, 5.3 per cent mineral matter and 175 IU/100 g vitamin A. Brassinosteroids are a new group of plant hormones with growth promoting activity (Mandava, 1988) [13] . Brassinosteroids are considered as plant hormones with pleiotropic effects as the influence on developmental processes of plants such as growth, seed germination, flowering, senescence, abscission and maturation (Sasse, 1999) [21] . Brassinosteroids improve the resistance in plant against environmental stresses such as water, salinity, low and high temperature stresses (Rao et al., 2002) [17] and it also enhances the crop productivity. Thiourea is a sulphydral compound which contains one-SH group and has been known to bring marked biological activity in plants. Use of thiourea as plant growth regulator (Sahu and Solanki, 1991) [19] may be helpful in this regard. Foliar spray of thiourea have been reported not only to improve growth and development of plants, but also the dry matter partitioning for increased grain yield (Arora, 2004) [2] . Application of naphthalic acetic acid (NAA) is known to induce higher physiological efficiency including photosynthetic ability of plants. It has also been shown to enhance growth and yield of several vegetables and agricultural crops without substantial increase in the cost of production (Sarada et al., 2008) [20] . Coriander variety RCr-41 is an important variety of Rajasthan covering large area and is recommended for normal sowing time.