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| 1 | Transformation of Sucrose to Starch and Protein in Rice Leaves and Grains under Two Establishment Methods显示文摘Six rice varieties, PR120, PR116, Feng Ai Zan, PR115, PAU201 and Punjab Mehak 1 were raised under aerobic and transplanting conditions to assess the effects of planting conditions on sucrose metabolising enzymes in relation to the transformation of free sugars to starch and protein in flag leaves and grains. Activities of sucrose synthase, sucrose phosphate synthase and acid invertase increased till flowering stage in leaves and mid-milky stage(14 d after flowering) in grains and thereafter declined in concomitant with the contents of reducing sugar. Under aerobic conditions, the activities of acid invertase and sucrose synthase(cleavage) significantly decreased in conjunction with the decrease in non-reducing sugars and starch content in all the varieties. Disruption of starch biosynthesis under the influence of aerobic conditions in both leaves and grains and the higher build up of sugars possibly resulted in their favoured utilization in nitrogen metabolism. Feng Ai Zan, PR115 and PR120 maintained higher levels of sucrose synthase enzymes in grains and leaves and contents of metabolites(amino acid, protein and non-reducing sugar) under aerobic conditions, while PR116, Punjab Mehak 1 and PAU201 performed better under transplanting conditions, thus showing their adaptation to environmental stress. Yield gap between aerobic and transplanting rice is attributed primarily to the difference in sink activity and strength. Overall, it appear that up-regulation of sucrose synthase(synthesis) and sucrose phosphate synthase under aerobic conditions might be responsible in enhancing growth and productivity of rice varieties. | Manisha KUMARI Bavita ASTHIR | 2016 | Rice science2016，23，5： | 2 |
| 2 | Variation in Antioxidants, Bioactive Compounds and Antioxidant Capacity in Germinated and Ungerminated Grains of Ten Rice Cultivars显示文摘Present study was conducted to characterise ten rice(Oryza sativa L.) cultivars viz. IET-23466, Dhan-201, IET-23448, MAS-946, IET-23445, IET-23463, IET-23455, PR-123, PR-115 and IET-23449 based on antioxidants(total phenolics, flavonols and tannins), bioactive compounds(phytic acid, gamma amino butyric acid, tocopherol and reduced ascorbate) and antioxidant activity(1,1-diphenyl-2-picrylhydrazyl radical scavenging activity, hydroxyl radical scavenging activity, free radical antioxidant power and total reducing power) with an aim to identify cultivars containing higher health promoting components after germination. Three cultivars IET-23466, IET-23463 and PR-123 performed better as revealed by higher level of antioxidants, bioactive compounds and antioxidant activity before and after germination. Three cultivars MAS-946, IET-23445 and IET-23449 had moderate level of antioxidants, bioactive compounds and antioxidant activity. Four cultivars Dhan-201, IET-23448, IET-23455 and PR-115 performed intermediately. Strong positive correlation was observed among total phenolics and the antioxidant activity. Phytic acid was found to be negatively correlated to the antioxidant activity. Our results highlighted that cultivars IET-23466, IET-23463 and PR-123 hold great potential after germination and would open up a useful opportunity for the functional food industry, and consumption of these cultivars after germination would afford health benefits to consumers since they contain higher level of antioxidants. | Maninder KAUR Bavita ASTHIR Gulshan MAHAJAN | 2017 | Rice science2017，24，6： | 2 |
| 3 | Effect of salicylic and abscisic acid administered through detached tillers on antioxidant system in developing wheat grains under heat stress显示文摘 | Bavita Asthir Satvir Kaur Satwinder K. Mann | 2009 | Acta Physiologiae Plantarum2009，，5： | 1 |
| 4 | Stimulation of an- tioxidative enzymes and polyamines during stripe rust disease of wheat显示文摘 | Asthir B Koundal A Bains N S | 2010 | Biologian Plantarum2010，54，2： | 1 |
| 5 | Kinetic and thermodynamic behaviour of wall-bound peroxidase from wheat leaves infected with stripe rust显示文摘 | Asthir B Koundal A Bains N | 2009 | Plant Growth Regulation2009，59，2： | 1 |
| 6 | Polyamine catabolism influences antioxidative de-fense mechanism in shoots and roots of five wheat genotypes under hightemperature stress显示文摘 | GOYAL M ASTHIR B | 2010 | Plant Growth Regulation2010，60，： | 1 |
| 7 | Nitrogen levels effect on wheat Nitrogen use efficiency and yield under field condi- tions 显示文摘 | Kaur G Asthir B Bains N S | 2015 | African Journal of Agricultural Research2015，10，23： | 1 |
| 8 | Proline:A key player in plant abiotic stress tolerance显示文摘 | KAUR G ASTHIR B | 2015 | Biologia pantarum2015，4，： | 1 |
| 9 | Temporal Dynamics of Antioxidant Defence System in Relation to Polyamine Catabolism in Rice under Direct-Seeded and Transplanted Conditions显示文摘Six rice cultivars viz. PR120, PR116, Feng Ai Zan, PR115, PAU201 and Punjab Mehak 1 under the direct-seeded and transplanted conditions were used to investigate the involvement of antioxidative defence system in relation to polyamine catabolism in temporal regulation of developing grains. Activities of ascorbate peroxidase(APx), guaiacol peroxidase(GPx), catalase(CAT), superoxide dismutase(SOD), polyamine oxidases(PAO) and contents of ascorbate, α-tocopherol, proline and polyamines increased gradually until mid-milky stage and then declined towards maturity stage under both planting conditions. The transplanted condition led to higher activities of antioxidative enzymes(APx, GPx and CAT) and contents of ascorbate, α-tocopherol and proline whereas the direct-seeded condition had elevated levels of PAO and SOD activities and contents of polyamines, lipid peroxide and hydrogen peroxide. Cultivars Feng Ai Zan and PR120 exhibited superior tolerance over other cultivars by accumulating higher contents of ascorbate, α-tocopherol and proline with increasing level of PAO and SOD activities under the direct-seeded condition. However, under the transplanted condition PR116 and PAU201 showed higher activities of antioxidative enzymes with decreasing content of lipid peroxide. Therefore, we concluded that under the direct-seeded condition, enhancements of polyamines content and PAO activity enabled rice cultivars more tolerant to oxidative stress, while under the transplanted condition, antioxidative defence with decreasing of lipid peroxide content was closely associated with the protection of grains by maintaining membrane integrity during rice grain filling. The results indicated that temporal dynamics of H2O2 metabolic machinery was strongly up-regulated especially at the mid-milky stage. | Manisha KUMARI Bavita ASTHIR Navtej Singh BAINS | 2014 | Rice science2014，21，6： | 0 |
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