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Not AvailableSesame (Sesamum indicum L.) an orphaned, neglected, multipurpose oilseed crop, which is least explored for systematic research and tolerance to abiotic stresses, such as drought. Leaf K in maintaining the plant water status, stomatal regulation and plant survival when exposed to various abiotic stresses is well known. An experiment was carried out to screen 71 available genotypes for leaf K accumulation pattern. The results revealed that under water stress conditions irrespective of the genotype, leaf K content was found to increase and was highly correlated with seed yield and RWC content although there were variations among the genotypes. This suggested the possible role of K in conferring stress tolerance in sesame.Not Availabl

Source and sink traits and their relationship under deficit soil moisture stress conditions in an indeterminate crop: sesame (Sesamum indicum L.)

ABSTRACTSesame is an indeterminate oilseeds crop where yield is a cumulative effect of source and its capacity for synthesis and mobilization of photosynthates. Knowledge of the existing relation between source and sink and its validation under deficit soil moisture conditions is limited in sesame. Therefore, experiments were conducted using twenty five sesame genotypes of differing for their plant architecture in terms of branching pattern (mono to multiple) and leaf area (minimum to maximum) under both irrigated (IR) and deficit moisture stress (DS) conditions for two consecutive years 2021 and 2022. The variations existing among the source and sink traits were measured and analysis of variance of the measured traits revealed a significant differences among the genotypes for source traits viz. leaf area, stem & leaf dry weight, net photosynthesis, total dry matter and their relationship with sink i.e. seed yield under IR and DS conditions and it was conformed using regression analysis. The results showed that source traits such as stem dry weight and total dry matter at the seed filling stage were positively associated with seed yield at both IR and DS conditions. Additionally, cluster analysis showed that the genotypes IC 54039-B-1 and SI 1802 had proportional leaf area with good seed yield and displayed a better source and sink relationship, highlighting the fact that photosynthates were efficiently translocated to the sink. The genotypes IC 54039-B-1 and SI 1802 outperformed IR under DS with minimal yield differences and optimal leaf weight, total dry matter, and plant stem weight. These genotypes with better source and sink relationships can be used in sesame crop improvement programmes

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Not AvailableIntermittent drought, seasonal temperature variations affect yield of sesame (Sesamum indicum L.) under rainfed conditions. Sesame germplasm were assessed for intermittent drought tolerance across season under field conditions. Seed yield was significantly and positively associated with leaf traits, leaf tissue moisture and CT across seasons. The identified trait specific germplasm will be used further in crop improvement programmeNot Availabl

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Not AvailableThis study examines the energy requirement and energy inputeoutput relationship of colocasia-based cropping systems viz., Colocasiaeonionefrenchbean, colocasiaegardenpeaefrenchbean, colocasiae wheateokra, colocasiaeradishepotato, colocasiaecabbageefrenchbean, colocasiaecorianderecauliflowere frenchbean, colocasiaecorinderetomato and riceewheat in the Indian Himalayas. Results revealed that potato consumed the highest total input energy (25084 MJ/ha) and the least was in coriander (5108 MJ/ha). System productivity in terms of colocasia equivalent yield was highest with colocasiae onionefrenchbean system (52.38 t/ha). Mineral fertilizers (50e62%), seed (8e26%) and irrigation water (11e17%) consumed the bulk of the input energy for all cropping systems. The total input energy was highest under colocasiaeradishepotato (59919 MJ/ha) and the lowest in riceewheat (38244 MJ/ha). Colocasiaeonionefrenchbean, with the highest system productivity, produced the highest energy productivity (1.203 kg/MJ). Colocasiaecorianderetomato, with the highest system biomass, produced higher energy ratio (30.4), human energy profitability (2813.4) and energy profitability (29.43). Colocasiaewheateokra (1362928 MJ/ha) recorded the highest total energy output. Human energy profitability was highest under colocasiaecorianderetomato (2813.4) indicating that it was the most labor energy efficient cropping system. Hence, the colocasiaecorinderetomato and colocasiae onionefrenchbean cropping systems are more suitable in the Indian Himalayas for their higher energy use efficiency and energy productivity, respectively, and are advised for wide adoption.Not Availabl