PHYSIOLOGICAL AND BIOCHEMICAL CHANGES IN SOME THERMOTOLERANT AND THERMOSENSITIVE CHILLI (Capsicum annuum L.) GENOTYPES
| dc.contributor.advisor | Ghai, Navita | |
| dc.contributor.author | Kaur, Jaspreet | |
| dc.date.accessioned | 2017-05-03T05:41:02Z | |
| dc.date.available | 2017-05-03T05:41:02Z | |
| dc.date.issued | 2014 | |
| dc.description.abstract | The present investigation was carried out to study the physiological and biochemical changes in some thermotolerant and thermosensitive chilli (Capsicum annuum L.) genotypes. Fourteen chilli genotypes viz., SL 461, PP 404, DL 161, MS 341, VR 521, PB 405, PS 403, SD 463, FL 201, AC 102, S 343, SL 462 and SL 464 along with sensitive check (Royal Wonder) were grown in a randomized block design with three replications during 2012-13. The observations on morpho-physiological and biochemical parameters and yield attributes were recorded between 45 to 105 days after transplanting (DAT) (high temperature period). On the basis of our studies, genotypes S 343, AC 102 and FL 201 were found to be relatively thermotolerant. However, high temperature markedly decreased the photosynthetic activity of chilli plants by decreasing the photosynthetic pigments (chlorophyll and carotenoid content) in leaf chloroplasts of all the genotypes. The levels of ascorbic acid, total soluble sugars and total phenols increased in the leaves of all the genotypes with the maturity of the crop. Electrolyte leakage and proline content also increased with rise in temperature. Genotypes AC 102 and S 343 were able to accumulate the maximum ascorbic acid, proline, total soluble sugars and total phenols under heat stress conditions. Early flowering was observed in relatively thermotolerant genotypes as compared to sensitive check (Royal Wonder). High temperature also caused a reduction in pollen viability, fruit size and seed number per fruit. Decrease in fruit set percent and fruit weight led to reduction in the total yield per plant. Maximum yield was observed in genotype S 343 followed by FL 201. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810010460 | |
| dc.keywords | Keywords: High temperature, chilli, proline, pollen viability, fruit set percent, yield | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Punjab Agricultural University, Ludhiana | en_US |
| dc.sub | Botany | en_US |
| dc.subject | null | en_US |
| dc.theme | BIOCHEMICAL | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | PHYSIOLOGICAL AND BIOCHEMICAL CHANGES IN SOME THERMOTOLERANT AND THERMOSENSITIVE CHILLI (Capsicum annuum L.) GENOTYPES | en_US |
| dc.type | Thesis | en_US |