Effect of low light stress on growth, yield and grain quality of rice (Oryza sativa L.)
| dc.contributor.advisor | Shankhdhar, S. C. | |
| dc.contributor.author | Rajni | |
| dc.date.accessioned | 2024-06-01T11:40:27Z | |
| dc.date.available | 2024-06-01T11:40:27Z | |
| dc.date.issued | 2023-02-01 | |
| dc.description.abstract | Rice (Oryza sativa L.) is one of the most important cereal crop for humans, consumed by more than half of the world's population. Asian countries produce 89 percent of the world's rice with China and India alone accounting for 55 percent of total production. Different environmental factors such as temperature, sunshine, rainfall, drought, salt and flooding have an impact on grain yield and biomass. Among these factors temperature, light and rainfall have an immediate impact on the physiological processes involved in grain production and yield. The first important component of light is light intensity which affects plant growth and development. Lower light intensity affects rice growth and development by influencing physiological traits biochemical parameters. For Effect of low light stress on growth, yield, and grain quality of rice( Oryza Sativa L. ) a field experiment was conducted in Norman E. Bourlog crop research center, G. B. Pant University of Agriculture and Technology, Pantnagar during kharif season 2022 with different rice genotypes, namely, LL-01, LL-02, LL-03, LL-04, LL-05, LL-06, LL-07, LL-08 and LL-09.These genotypes were transplanted in two blocks, one for control and another block for imposing low light stress by covering the block with 50 % shade net supported by bamboo sticks. Both the entry ends were open for sufficient ventilation. A number of parameters such as plant height, leaf area, chlorophyll, photosynthetic rate, intercellular CO2 concentration, protein, carbohydrate, Proline content , grain yield, and total dry matter, stem weight, panicle number, stomatal conductance, transpiration rate, were recorded in different rice genotypes and it was found that except plant height and chlorophyll content, thousand grain weight all the parameters reduced significantly under low light stress. The genotypic variations in these characteristics were also found. Some genotypes showed tolerance for low light stress and some were found to be susceptible. Finally the grain yield, harvest index, number of filled grain spikelet no per panicle indicated that low light stress adversely affected these parameters. The low light stress tolerant genotypes performed better in terms of filled grain numbers and spikelet no per panicle, harvest index as compared to susceptible genotypes. In present study, , LL-04 ,LL-06 and LL-09 was reported to be more adaptable and LL-02 and LL-05 were found to be sensitive for low light stress. | |
| dc.identifier.citation | Theses of M.Sc. | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810209582 | |
| dc.language.iso | English | |
| dc.pages | 91 p.p. | |
| dc.publisher | G. B. Pant University of Agriculture & Technology, Pantnagar-263145 | |
| dc.relation.ispartofseries | 10829 | |
| dc.sub | Plant Physiology | |
| dc.theme | Academic Research | |
| dc.these.type | M.Sc | |
| dc.title | Effect of low light stress on growth, yield and grain quality of rice (Oryza sativa L.) | |
| dc.type | Thesis |