Management of elevated CO 2 induced high temperature through nutrient and biofertilizer application in tomato (Solanum lycopersicum L.) (Record no. 289337)
[ view plain ]
| 000 -LEADER | |
|---|---|
| fixed length control field | 05145nam a22001697a 4500 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 571.2 |
| Item number | ARU/MA PG |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Arunima, A S |
| 245 ## - TITLE STATEMENT | |
| Title | Management of elevated CO 2 induced high temperature through nutrient and biofertilizer application in tomato (Solanum lycopersicum L.) |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Vellayani |
| Name of publisher, distributor, etc | Department of Plant Physiology, College of Agriculture |
| Date of publication, distribution, etc | 2021 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 130p. |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | M Sc |
| 520 ## - SUMMARY, ETC. | |
| Abstract | The study entitled “Management of elevated CO 2 induced high temperature through nutrient and biofertilizer application in tomato (Solanum lycopersicum L.)” was undertaken with the objective of improving flowering and fruit set of tomato under elevated CO 2 condition through nutrient and biofertilizer application. The experiment was conducted using the Open Top Chamber (OTC) facility at the Department of Plant Physiology, College of Agriculture, Vellyani during 2020-2021. In the experiment, flowering and fruiting in tomato under elevated CO 2 environment, as influenced by nutrients and biofertilizers were evaluated. The experiment was laid out in CRD with nine treatments and three replications. The treatments comprised of T 1 :50 ppm B + 50 ppm Zn + water spray, T 2 :75 ppm B + 75 ppm Zn, T 3 : POP 150% N:125%P:125% K, T 4 : Azolla (soil application), T 5 :Azolla biofertilizer extract (20%) (foliar application), T 6 : Azolla biofertilizer extract(20%)(seed treatment), T 7 :POP, KAU+ PGPR1, T 8 : Control (water spray) and T 9 : Absolute control. Experimental results revealed that plant height, number of branches, number of leaves and specific leaf area increased significantly under elevated CO 2 condition at 75DAS. Among the treatments, foliar spray with 50ppmB+50ppm Zn+ water spray at 40, 55and 70 DAS recorded higher plant height (57.56%) at 75DAS. Nutrient application of 150%N:125%P:125%K found to improve the number of branches (91.82%), leaves (98.56%) and specific leaf area (40.03%) at 75DAS. Among the physiological and biochemical parameters, total chlorophyll content, total carbohydrate, photosynthetic rate, water use efficiency, chlorophyll fluorescence, chlorophyll stability index and proline content recorded higher values inside OTC compared to open condition. However, a significant reduction was noted in transpiration rate and total soluble protein content inside OTC compared to open condition. The foliar spray of 50ppm B+50ppm Zn+ water spray recorded high values for chlorophyll content (1.58 mg g -1 ) and cell membrane stability index (53.83%) compared to open condition at 75DAS. The application of POP 150% N:125% P:125% K recorded significantly higher photosynthetic rate (21.03μmol CO 2 m -2 sec -1 ), total carbohydrate(50.04mgg -1 ), chlorophyll stability index(135.38%) and chlorophyll fluorescence (0.74Fv/Fm). Also foliar application of 20% Azolla biofertilizer extract was found to significantly improve the relative water content (96.15%) and water use efficiency(6.82 mmol CO 2 mol -1 H 2 O) in tomato plants under elevated CO 2 conditions. Inside OTC, flowering delayed by 2 days and the total number of flower clusters (5.96) also increased compared to control (4.12). Reduction in pollen viability (82.42%) observed at higher CO 2 compared to control. But it was found to improve under treatment T1 (50ppm B+ 50ppm Zn + water spray) which resulted in highest fruit setting percentage (53.01%) as against the control (39.92%). Fruiting was delayed by 3 days inside OTC. However, the fruit weight was found to increase with water spray (54.46%), extra NPK(55.89%) and foliar spray of 50ppm B+ 50ppm Zn+ water spray(57.51%). Foliar application of Azolla biofertilizer extract (20%)(T5), 150% N:125% P:125% K(T3) than the recommended dose, as well as foliar application 50ppm B + 50ppm Zn+ water spray (T1) improved the yield per plant by 55.79%, 63.08% and 65.22% respectively compared to control. All these treatments also improved the quality parameters like lycopene, vitamin C, beta carotene and minerals (P, Fe) in tomato fruits under elevated CO 2 condition. The present study indicated the improved performance of tomato variety Vellayani vijay upon exposure to elevated CO 2 . But flowering, fruit set and ultimately the total yield were negatively influenced by elevated CO 2 induced high temperature. The impact of application of extra N, P and K than the recommended doses as well as foliar application of B and Zn indicate the changing nutrient requirement of tomato under the current scenario of increasing atmospheric CO 2 concentration. The response of experimental plants to foliar application of Azolla extract (20%) strongly suggest the effectiveness of this biofertilizer in overcoming the impacts of elevated CO 2 induced high temperature and thereby improving the plant performance. Recommendations based on the best treatments can be developed by extending the study to field condition since the treatments were found to improve the yield and quality even under ambient condition |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Plant Physiology |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Tomato |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | R V, Manju |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | |
| Item type | Theses |
| Not for loan | Collection code | Permanent location | Current location | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Thesis | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 2022-04-21 | 571.2 ARU/MA PG | 175277 | 2022-04-21 | Theses |