In Khasi mandarin (Citrus reticulata Blanco) influence of rootstock age (i.e. 05, 06, 07, 08, 09, 11, 12, 13, 14 months) and propagation methods (i.e. wedge grafting and T-budding) on graft/bud success, plant survival, scion physiology and root morphology were studied. The wedge grafting performed on six months old rootstock (T2) recorded maximum graft success (90.0%) and plant survival (88.87%) followed by T3 (80.0 and 77.17%), i.e. wedge grafting on seven months old rootstock, which was significantly (P=0.05) higher than T7 (68.33 and 67.78%), i.e.conventional T-budding on twelve months old rootstock. Morpho-physiological traits, viz. higher individual leaf fresh weight (0.42g) and dry weight (0.16 g), specific leaf weight (5.19 mg/cm2) and leaf thickness (496.67 μm) were recorded in T2. In addition, the leaf pigment contents, viz. chlorophyll ‘a’ (0.77 mg/g tissue) and total chlorophyll content (1.12 mg/g tissue) was found higher in T2 followed by T3 (0.76 mg/g tissue and 1.07 mg/g tissue). Similarly,carotenoid content was recorded maximum in T2 (47.07 μ/g) at par with T-budding on eleven (43.15 μ/g) and 12 (42.94 μ/g) months old rootstock. Relative leaf water content was recorded highest in T3 (61.29%) and T2 (60.68%).Further, T2 recorded higher total root length (385.36 cm) and root surface area (721.20 cm2) while, root volume wasrecorded maximum in wedge grafting on five month old rootstock (156.29 cm3) at par with T3 (155.01cm3) and T2(152.31 cm3). The root diameter was recorded highest in T7 (7.54 mm), whereas the root to shoot ratio was foundhighest in T2 (0.88) followed by T3 (0.75) and T7 (0.70). The results suggested that wedge grafting method could begainfully exploited for Khasi mandarin propagation.
Abstract:The present work deals with preliminary in-vitro studies to validate the traditional claims of medicinal properties in consuming Curcuma flowers to make the person less susceptible to diseases and the estimation of bioactive compounds responsible for antioxidant activity present. The anti-proliferative activity of aqueous extracts of budding flowers, leaves, full bloomed flowers and mixture of all parts of Curcuma angustifolia was studied using MDCK, Vero and HeLa cell lines. The inhibitory activity in all the three cell lines was found to be dose dependent. The extract of leaves and budding flowers exhibited higher inhibitions in MDCK and Vero cells while the full bloomed flowers extract showed higher inhibitory activities in HeLa cells. The bioactive compounds-total phenolics content ranged from 56.96 to 86.77 mg GEA/100 gm which was highest in full bloomed flowers, total flavonoids and the free radical scavenging activity content ranged from 84.74 to 166.11 mg CE/100 g and 43.91 to 64.02 mg AEAC/100 gm respectively, with maximum content in budding flowers. The result showed potential anti-proliferative and antioxidant properties that substantiate the belief of the indigenous people to include the plant in their dietary habits which could be exploited for use in preparation of herbal drugs and supplements.
The Northeast region (NER) of India comprises of 8 sister states namely Assam, Meghalaya, Tripura, Nagaland, Sikkim, Arunachal Pradesh, Mizoram and Manipur. The region has an agrarian economy composing of rich agricultural resources which needs strategic exploration for inclusive growth of the region. This can be achieved through the realization of the immense scope and potential for agribusiness in the region. The study aims to explore the agribusiness scenario in the region and to throw light on the constraints in the sector prevailing in the region. Several agribusiness ventures have also been discussed which have potential in the region’s unique business ecosystem. Finally several strategies were provided which may have policy implications on future entrepreneurial development strategies in the region. The descriptive policy paper was formulated based on data collected and experienced gained from over four years (2016-2020) of entrepreneurial development activities by the Agri Business Incubation Centre under Indian Council of Agricultural Research, Research Centre for North Eastern Hill region (ICAR RC for NEH) and its 5 regional centers across the NER. Further, references from other researchers have been included to substantiate the topics discussed here and improve validity of the observations. Agribusiness sector in the region may be promoted through intensified entrepreneurial initiatives by adequately exploiting the resource potential, particularly in agriculture, horticulture, animal husbandry and fishery sector. This creation of market driven products to suffice the demands of growing middle-class consumers will lead to improve rural employment generation, augment farm income and raise revenue through intensified participation in export trade. However several infrastructural, technical and policy improvement have to be made in order to unlock the potential of these ventures. Only planned structural and strategic changes which include increased exports, impactful research and development, institutional support, etc., can be catalytic for entrepreneurial development in the region.
To increase the strawberry production especially during offseason with the application of plant bio-regulators, the present study was conducted under subtropical mid-hill conditions of Arunachal Pradesh, India during spring-summer months of 2015-16. Effect of springtime foliar application of different plant bio-regulators viz., NAA, GA3, and BA on plant growth, yield and quality attributes of strawberry cv. Chandler with the advantage of increasing strawberry production during the off-season was accessed during the current study. The experiment was laid out in a randomized block design with ten treatment combinations (NAA, GA3, and BA at 50, 100, and 150 ppm each) replicated thrice considering water spray as control. The plant bio-regulators were sprayed at 25 days after transplanting and at the bud initiation stage. Results of the experiment revealed that the plants treated with GA3 150 ppm significantly influenced the plant height and number of leaves per plant at 30, 45, 60 and 75 days after transplanting. The minimum number of days taken to open the first flower (62.11 days) and the maximum number of runners per plant (9.17) were also recorded in the plants treated with GA3 150 ppm. While, GA3 50 ppm treated plants yielded fruits with maximum berry length (3.69 cm), berry width (2.74 cm), average berry weight (13.99 g), number of berries per plant (21.11) and yield per plant (209.11 g). Concerning the quality parameters of fruits, plants treated with NAA 100 ppm exhibited maximum TSS (9.00° B), total sugar (7.23 %), and ascorbic acid content (77.82 mg/100 g) whereas, GA3 100 ppm treatment significantly increased the contents of anthocyanin (122.18 mg/100 g), total phenols (69.42 mg/100 g) and β-carotene (3.96 µg/100 g).
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