Aims: This research was carried out to standardize the suitable size and optimum stage for grafting of annual moringa scion cv. PKM 1 on perennial moringa rootstock based on the physical parameters of both rootstock and scion. Study Design: The study was carried out in Completely Randomized Design (CRD) with 6 treatments and 4 replications. Place and Duration of Study: This study was carried out TNAU Orchard of Department of Vegetable Science, Horticultural College & Research Institute, Tamil Nadu Agricultural University, Coimbatore during 2021-2022. Methodology: Here the perennial rootstock used was Moolanur moringa (MO 1) and the annual scion was PKM 1. The physical parameters were recorded after 14 and 21 days after grafting. The biochemical parameters were estimated with respective procedures and instruments. Results: It can be concluded that the performance of the grafts of annual moringa cv. PKM 1 scion on Moolanur 1 perennial moringa rootstock with 0.51 cm diameter attained at 40 days after germination was superior with regard to yield and quality parameters when compared with the rootstock and scion individually. Conclusion: Perennial moringa ecotype Moolanur moringa (MO 1) at 40 days after germination with a thickness of 0.51 cm is the best rootstock stage for successful grafting with annual moringa scion var. PKM 1. The study will be continued to assess the field performance of the grafted plants.
Across the globe, tomato (Solanum lycopersicum L.) is a commonly used vegetable for culinary purposes. Despite its economic importance, its production is decreasing now a days due to the occurrence of various abiotic stresses like drought. Hence, it is important to understand the mechanism of drought tolerance to sustain tomato production. A field experiment was conducted with drought tolerant and susceptible genotypes to understand the mechanism of tolerance or susceptibility. Drought stress was imposed during the flowering stage for 19 days. The physiological traits like relative water content, pigmentation, flower abscission percentage and fruit set percentage were recorded. The results showed that relative water content was decreased by 20.47 % in the SL CBE G 26 and 40.98 % in the SL CBE G 23. However, the flower drop was highest in the line SL CBE G 23 (23.29%) and lowest in SL CBE G 26 (19.14 %) under drought stress. The line SL CBE G 23 had lower fruit set than SL CBE 26. Hence, the study confirmed that SL CBE G 26 is a drought tolerant line and drought tolerance is associated with increased water retention in the tissue, eventually resulting in decreased flower drop and increased fruit set percentage.
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