8 research outputs found
Capturing Plant Genetic Potential of Upland Rice for Exploiting Arbuscular Mycorrhiza Responsiveness to Improve Rice Variety for Higher Phosphorus (P) Acquisition Under P Limiting Environments
No full textEFFECT OF ARBUSCULAR MYCORRHIZAL (AM) INOCULATION ON UPLAND RICE ROOT SYSTEM
No full textABSTRACT
This paper provides a brief assessment of the effect of AM (arbuscular mycorrhizal) inoculation on certain root morphological characters (root length, root diameter, root surface area, root volume, root length density) and branching pattern (fractal dimension) of upland rice (Oryza sativa L.) an important food grain crop. The uplands in India being rainfed is drought prone and crop productivity is severely crippled due to major constraint of inefficient phosphorus (P) acquisition. The effects of AM fungi (AMF) on enhancing rice plant growth, P uptake and yield are well-acknowledged. The present investigation will aid in generating information on influence of AMF association on rice root growth which would provide further clues for possible exploitation of AMF activities in favor of rice crop. For this, three upland varieties, Sathi 34-36 (highly AM-responsive), Jonga (AM non-responsive) and Vandana (moderately AM-responsive) were selected. AM-responsiveness of these three varieties was measured as a change in total dry matter production as a result of AM-symbiosis (on inoculation with AM fungi). P uptake at 40 DAE (days of emergence) under un-inoculated low P conditions for the three rice varieties was also evaluated with Sathi 34-36 having the highest tissue P content. Root morphological attributes like root length density, total root length, root diameter, root volume and root surface area were increased on AMF inoculation in both responsive (Sathi 34-36) and non-responsive (Jonga) variety with higher magnitude only in non-responsive variety (Jonga). Thus, AM-responsive variety (Sathi 34-36) having higher P-demand (due to increased P-uptake) was more dependent on mycorrhizal pathway for P acquisition than non-responsive (Jonga) variety. Between responsive varieties, Sathi 34-36 along with its inherent better P demand compared to Vandana was altered significantly in root morphology suggesting that varieties with high P uptake ability under low P conditions would be more responsive to AM inoculation and thus would be more likely to undergo root morphological changes
Integration of crop rotation and arbuscular mycorrhiza (AM) inoculum application for enhancing AM activity to improve phosphorus nutrition and yield of upland rice (Oryza sativa L.)
No full text
Arbuscular Mycorrhizal Technology Based on Ecosystem Services Rendered by Native Flora for Improving Phosphorus Nutrition of Upland Rice: Status and Prospect
No full textPower and status in groups
No full textDifferences in power and status are the basis for social relations and interactions within workgroups. While a small body of research has investigated the consequences of power and status in groups, there is a general emphasis in the extant literature to consider power and status independently, even though they can be causally related and mutually reinforcing. Therefore, the purpose of this dissertation is to explicate the opposing consequences of power and status in groups and also investigate the joint influence of power and status on psychological safety, collective efficacy, and workgroup effectiveness. Distinguishing power and status in groups, and also investigating the joint effects, are important advances to the existing group research, which has often confounded power and status. Additionally, clearly understanding the distinct group processes and outcomes that emerge from each group structure may mitigate any possible harmful effects that may occur in task-focused workgroups. Chapter 1 provides a brief overview of the central constructs and theory investigated in this dissertation. Chapter 2 provides conceptual and theoretical contexts for the exploration of the central constructs. Chapter 3 describes the hypothesized model. Whereas power differentiation is predicted to lead to higher psychological safety, collective efficacy, and group effectiveness, I predict that status differentiation will lead to lower levels of psychological safety, collective efficacy, and group effectiveness. Furthermore, I predict that power differentiation will have a more positive influence on group emergent states (psychological safety and collective efficacy) and effectiveness when status differentiation is lower within groups. Chapter 4 describes the research methods and results. Data were collected from two healthcare facilities, pilot study (18 workgroups) and main study (80 workgroups), to test the hypothesized model. As predicted, I found that power differentiation is negatively related to treatment errors. In addition, I found that status differentiation is negatively related to psychological safety and collective efficacy. Chapter 5 identifies implications for researchers and organizations and discusses additional points of interest for future research.Ph.D.Includes bibliographical referencesIncludes vitaby Jamie Lyn Perr
A Comprehensive Overview on Application of Bioinformatics and Computational Statistics in Rice Genomics Toward an Amalgamated Approach for Improving Acquaintance Base
No full textDownregulation of exhausted cytotoxic T cells in gene expression networks of multisystem inflammatory syndrome in children
No full textMultisystem inflammatory syndrome in children (MIS-C) onsets in COVID-19 patients with manifestations similar to Kawasaki disease (KD). Here the author probe the peripheral blood transcriptome of MIS-C patients to find signatures related to natural killer (NK) cell activation and CD8+ T cell exhaustion that are shared with KD patients
