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    ENHANCING DROUGHT TOLERANCE IN CAMELINA SATIVA L. AND CANOLA (BRASSICA NAPUS L.) THROUGH APPLICATION OF SELENIUM
    (2020) Ahmad, Zahoor; Waraich, Ejaz Ahmad; Barutçular, Celaleddin; Alharby, Hesham; Bamagoos, Atif; Kızılgeçi, Ferhat; Öztürk, Ferhat; Hossain, Akbar; Bayoumi, Yousry; EL SABAGH, Ayman
    Considering the burning issue the present study was undertaken in pot culture at the Cholistan Institute of Desert Studies (CIDS), The Islamia University of Bahawalpur, Pakistan for enhancing drought tolerance in two oilseed crops (OC) crops camelina (Camelina sativa L.) and canola (Canola napus L.) through improving physiological, biochemical, and antioxidants activity by foliar application of selenium (Se) under drought stress. Two Camelina (i.e., ‘Australian Camelina’ and ‘Canadian Camelina’) and canola genotypes (i.e., ‘AARI Canola’ and ‘UAF Canola’) were used as plant materials during the growing season of 2016. Both Camelina and Canola genotypes were grown under normal (100% FC) and water deficit (drought stress) (40% FC) conditions. Four levels of Se: such as seeds priming with 75μM Se, foliar application of Se at 7.06 μM and foliar Se in combination with seeds priming (7.06 μM & 75μM) along with control were applied at the vegetative stage of both OC crops for screening drought tolerant genotypes. All treatments were arranged three times in a randomized complete block design. Both OC crops were grown upto the maturity and data on physiochemical, antioxidants and yield components were recorded during this study. Results of the present study indicated that the physio-biochemical parameters such as WP (water potential), OP (osmotic potential), TP (turgor pressure), proline, TSS (total soluble sugar), TFAA (total free amino acids), TPr (total proteins) and TS (total sugars); and total chlorophyll contents were improved by foliar application Se along with seed priming by Se in both OC crops in both drought stress and non-stress (control) conditions. Similarly, osmoprotectants such as GB (Glycinebetaine), anthocyanin, TPC (total phenolic contents) and flavonoids; as well as antioxidants such as APX (ascorbate peroxidase), SOD (superoxide dismutase), POD (peroxidase) and CAT (catalase) were also showed better enhancement in both OC crops through foliar application in combination with seed priming with Se (7.06 μM & 75μM) under normal as well as water deficit (drought) conditions. Yield and its components i.e., branches plant-1 (no.), 1000-seed weight (g), seed and biological yield (t ha-1 ) of both OC crops were increased through foliar application in combination with seed priming by Se (7.06 μM & 75μM) under drought and non-drought stress conditions. Both camelina and Canola genotypes categorized based on all the above-mentioned parameters under the water deficit (drought stress) condition and foliar application of Se, the genotype ‘Canadian Camelina’ maintained the highest values for all these attributes. Therefore, it is revealed that foliar application in combination with seed priming by Se helps to improve drought tolerance of OC crops and also leads to an increase in the productivity of crops under drought stress. Among the genotypes, ‘Canadian Camelina’ performed the best when seeds of the genotypes were primed with Se in combination with foliar application of Se at the vegetative stage.
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    PHENOLOGY, GROWTH AND YIELD ARE STRONGLY INFLUENCED BY HEAT STRESS IN LATE SOWN MUSTARD (BRASSICA SPP.) VARIETIES
    (2020) Bazzaz, Md., Mahfuz; Hossain, Akbar; FAROOQ, Muhammad; Alharby, Hesham; Bamagoos, Atif; Nuruzzaman, Md; Khanum, Mahbuba; Hossain, Md. Monwar; Kızılgeçi, Ferhat; Öztürk, Ferhat; Çığ, Fatih; EL SABAGH, Ayman
    In rice-based cropping system of northern Bangladesh, mustard planting is delayed due to late harvest of monsoon rice (Transplanted Aman rice; T. Aman rice). The late sown mustard is often exposed to high-temperature stress during the reproductive stage, which causes a significant decrease in seed yield. Most of the farmers plant a low yielding local mustard variety ‘Tori-7’, which is sensitive to high-temperature stress. The Oil Seeds Research Centre of Bangladesh Agricultural Research Institute has recently released short duration and high-yielding mustard varieties for the rice-based cropping system of northern Bangladesh to tackle this issue. However, the performance of these varieties in the target cropping system under late sown conditions (together with exposure to heat stress) has not been evaluated yet. Therefore, this two year field experiment was conducted to assess the performance of newly released mustard varieties ‘BARI Sarisha-14’ and ‘BARI Sarisha-15’ in comparison with the local check variety ‘Tori-7’ sown at five planting dates (viz. October 21, November 1, November 10, November 20, and November 30). The delay in sowing shortened time (days) to flowering and maturity, regardless of the variety. Similarly, plant height, branches/plant and total dry matter accumulation of the tested varieties were also reduced upon delay in planting. The greatest seed yield was observed in varieties ‘BARI Sarisha-15’ and ‘BARI Sarisha-14’ when sown on October 21. These two varieties produced fair seed yield when sown at November 20. However, the local variety ‘Tori7’ yielded the least across all the planting dates. Therefore, the varieties ‘BARI Sarisha-14’ and ‘BARI Sarisha-15’ may be planted in the rice-based cropping system of northern Bangladesh after harvest of T. Aman rice to get maximum seed yield