Radiation utilization efficiency,latent heat flux,and crop growth simulation in irrigated rice during post-flood period in east coast of India     

Gouranga Kar  Ashwani Kumar  Narayan Sahoo  Sucharita Mohapatra 《Paddy and Water Environment》2014,12(2):285-297

To study the radiation utilization efficiency, latent heat flux, and simulate growth of rice during post-flood period in eastern coast of India, on-farm trial was conducted with three water regimes in main plots (W ₁ = continuous flooding of 5 cm, W ₂ = irrigation after 2 days of water disappearance, and W ₃ = irrigation after 5 days of water disappearance) and five nitrogen levels in subplots (N ₁ = 0 kg N ha^?1, N ₂ = 60 kg N ha^?1, N ₃ = 90 kg N ha^?1, N ₄ = 120 kg N ha^?1, and N ₅ = 150 kg N ha^?1) on a rice cultivar, ‘Lalat’. Average maximum radiation utilization efficiency (RUE) in terms of above ground dry biomass of 2.09 (±0.05), 2.10 (±0.02), and 1.9 (±0.08) g MJ^?1 were computed under W ₁, W ₂, and W ₃, respectively. Nitrogen increased the RUE significantly, mean RUE values were computed as 1.60 (±0.07), 1.78 (±0.02), 2.060 (±0.08), 2.30 (±0.07), and 2.34 (±0.08) g MJ^?1 when the crop was grown with 0, 60, 90, 120, and 150 kg ha^?1 nitrogen, respectively. Midday average latent heat flux (on clear days) varied from 7.4 to 14.9 and 8 to 13.6 MJ m^?2 day^?1 under W ₂ and W ₃ treatments, respectively, at different growth stages of the crop in different seasons. The DSSAT 4.5 model was used to simulate phenology, growth, and yield which predicted fairly well under higher dose of nitrogen (90 kg and above), but the model performance was found to be poor under low-nitrogen dose.  相似文献   

Molecular characterization and induced expression analysis of the terminal complement component C9 in rohu,Labeo rohita     

Amruta Mohapatra  Sweta Das  Sudeshna Dey  Pramoda K. Sahoo 《Aquaculture Research》2020,51(4):1415-1427

The complement component 9 (C9) plays a significant role in the formation of membrane attack complex (MAC) on the targeted cell surface. The current study is dealt with molecular characterization of C9 gene from rohu, Labeo rohita, an important cultured carp species in India. An open reading frame (ORF) of 1998 bp was amplified by polymerase chain reaction (PCR) that encodes a polypeptide of 666 amino acids having a signal peptide of 19 amino acids and a mature peptide of 647 amino acids. The SMART domain architecture analysis revealed two thrombospondin type‐1 domains (TSP1), a low‐density lipoprotein receptor domain class A (LDLa), a membrane attack complex and perforin (MACPF) domain, and an epidermal growth factor (EGF)‐like domain. Multiple sequence alignment and evolutionary analysis revealed a primitive C9 sequence of rohu with maximum similarity and clustering with common carp, grass carp and zebrafish. C9 was highly expressed in liver and constitutively expressed in wide array of tissues except in eye of rohu juveniles. It was expressed during early developmental days of rohu including in milt. A variable level of up‐regulation in C9 expression was noticed upon poly I:C induction, Aeromonas hydrophila and Argulus siamensis infections in liver, spleen and gill tissues of rohu at different time points. A constitutive expression of C9 in different stages of rohu during the ontogeny and in response to pathogen exposures along with high degree of sequence homology with other fish species proved it as an important primitive immune molecule of the complement system lytic pathway.  相似文献