PhD Thesis
Permanent URI for this collectionhttp://localhost:4000/handle/123456789/48
Browse
2 results
Search Results
Item Zinc homeostasis and carbon sequestration as influenced by biofertilizers and CO2 enrichment in rice (Oryza sativa L.)(Department of plant pathology, college of agriculture ,Vellayani, 2023-07-21) Amrutha, E A.; Manju, R VThe study entitled "Zinc homeostasis and carbon sequestration as influenced by biofertilizers and CO2 enrichment in rice (Oryza sativa L.)" was undertaken with the objectives of assessing the impact of biofertilizers on Zn uptake, translocation and soil carbon sequestration and the mechanism of Zn transport as influenced by CO2 enrichment. The first experiment was conducted to study the influence of biofertilizers on Zn uptake, translocation, and carbon sequestration at IFSRS, Karamana. The experiment was laid out in RBD with eleven treatments and three replications. The treatments comprised of T1: PoP, KAU + Azolla, T2: PoP, KAU + AMF, T3: PoP, KAU + PGPR Mix I, T4: PoP, KAU + KSB, T5: PoP, KAU + PSB, T6: T1 + AMF, T7: T1 + PGPR Mix I, T8: T1 + KSB, T9: T1 + PSB, T10: Control and T11: PoP+ Zinc sulphate spray. The gene expression analysis revealed the down regulation of OsZIP4 genes under elevated CO2 compared to ambient CO2. Biofertilizer induced overexpression of OsZIP 4 genes is found to play significant role in improving Zn translocation. The study results could be helpful to formulate climate smart agricultural practices strategies to address the wide spread problem of limited availability of Zn among the populationItem Bioecology of major coccinellid predators of Kerala(Department of agricultural entomology, college of agriculture , Vellayani, 2023-07-07) Anusree, S S; Anitha, NAn investigation on “Bioecology of major coccinellid predators of Kerala” was carried out at Department of Entomology, College of Agriculture, Vellayani during 2017-2022 with the objective to identify major coccinellid predators of pests infesting agricultural crops from agro ecological zones of Kerala and to study biology and predatory potential of select coccinellids. In the present investigation, 40 species of predatory coccinellids belonging to 23 genera under 6 tribes in the Subfamily Coccinellinae were illustrated. Taxonomic study on tribes Aspidimerini and Chilocorini resulted in the identification of three species in each tribe. Examination on specimens of tribe Coccidulini resulted in identifying 16 species within five genera. 11 species belonging to nine genera were illustrated under tribe Coccinellini. A single species was illustrated and studied under tribe Hyperaspidini. The specimens studied under tribe Sticholotidini belonged to six species within four genera. Among the 40 illustrated species, 28 species were identified, while identity of 12 species are to be confirmed, of which three are putative new species. Phrynocaria perfida Poorani collected and illustrated during this investigation were confirmed and described as a new species (Poorani et al., 2021). Chilocorus sp.1 and Scymnus (Pullus) sp.4 are the other two putative new species. Phrynocaria perrotetti (Mulsant), Cryptogonus orbiculus (Gyllenhal) and Sticholotis ferruginea (Gorham) are new records from Kerala.