Quantification of relation between disease intensities and physiological and biochemical changes in mulberry due to greyleaf spot
In order to understand virtual loss due to pathogenesis, quantitative determination of biochemical constitutions and physiological alterations were made at various intensities (1-5%, 6-15%, 16-30%, 31-50% and >50% leaf area infected) of grey leaf spot (Pseudocercospora mori) in mulberry in co...
| Main Authors: | , , , |
|---|---|
| Format: | Journal Article |
| Published: |
2011
|
| Online Access: | http://hdl.handle.net/20.500.11937/28357 |
| _version_ | 1848752514302738432 |
|---|---|
| author | Pratheesh Kumar, P. Qadri, S. Pal, Sebely Misra, A. |
| author_facet | Pratheesh Kumar, P. Qadri, S. Pal, Sebely Misra, A. |
| author_sort | Pratheesh Kumar, P. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In order to understand virtual loss due to pathogenesis, quantitative determination of biochemical constitutions and physiological alterations were made at various intensities (1-5%, 6-15%, 16-30%, 31-50% and >50% leaf area infected) of grey leaf spot (Pseudocercospora mori) in mulberry in comparison with healthy leaves. Biochemical constituents such as total chlorophyll, total soluble sugar and total protein declined while, total phenol content increased significantly due to pathogen infection. Chlorophyll (r 2=0.92), sugar (r 2=0.85) and protein (r 2=0.83) contents showed negative whereas, phenol (r 2=0.61) showed positive correlation with intensity of the disease. Similarly, photosynthetic rate, transpiration rate stomatal conductance, leaf moisture content and instantaneous water use efficiency (WUEi) decreased significantly (P<0.05), whereas, stomatal resistance increased in the infected leaves. Physiological parameters also showed significant correlation with disease intensity. Photosynthetic rate (r 2=0.95), transpiration rate (r 2=0.84), stomatal conductance (r 2=0.57), physiological water use efficiency (r 2=0.83), and leaf moisture content (r 2=0.95) were negatively correlated and stomatal resistance (r 2=0.92) was positively correlated with the disease intensity. |
| first_indexed | 2025-11-14T08:09:50Z |
| format | Journal Article |
| id | curtin-20.500.11937-28357 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:09:50Z |
| publishDate | 2011 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-283572017-01-30T13:04:37Z Quantification of relation between disease intensities and physiological and biochemical changes in mulberry due to greyleaf spot Pratheesh Kumar, P. Qadri, S. Pal, Sebely Misra, A. In order to understand virtual loss due to pathogenesis, quantitative determination of biochemical constitutions and physiological alterations were made at various intensities (1-5%, 6-15%, 16-30%, 31-50% and >50% leaf area infected) of grey leaf spot (Pseudocercospora mori) in mulberry in comparison with healthy leaves. Biochemical constituents such as total chlorophyll, total soluble sugar and total protein declined while, total phenol content increased significantly due to pathogen infection. Chlorophyll (r 2=0.92), sugar (r 2=0.85) and protein (r 2=0.83) contents showed negative whereas, phenol (r 2=0.61) showed positive correlation with intensity of the disease. Similarly, photosynthetic rate, transpiration rate stomatal conductance, leaf moisture content and instantaneous water use efficiency (WUEi) decreased significantly (P<0.05), whereas, stomatal resistance increased in the infected leaves. Physiological parameters also showed significant correlation with disease intensity. Photosynthetic rate (r 2=0.95), transpiration rate (r 2=0.84), stomatal conductance (r 2=0.57), physiological water use efficiency (r 2=0.83), and leaf moisture content (r 2=0.95) were negatively correlated and stomatal resistance (r 2=0.92) was positively correlated with the disease intensity. 2011 Journal Article http://hdl.handle.net/20.500.11937/28357 restricted |
| spellingShingle | Pratheesh Kumar, P. Qadri, S. Pal, Sebely Misra, A. Quantification of relation between disease intensities and physiological and biochemical changes in mulberry due to greyleaf spot |
| title | Quantification of relation between disease intensities and physiological and biochemical changes in mulberry due to greyleaf spot |
| title_full | Quantification of relation between disease intensities and physiological and biochemical changes in mulberry due to greyleaf spot |
| title_fullStr | Quantification of relation between disease intensities and physiological and biochemical changes in mulberry due to greyleaf spot |
| title_full_unstemmed | Quantification of relation between disease intensities and physiological and biochemical changes in mulberry due to greyleaf spot |
| title_short | Quantification of relation between disease intensities and physiological and biochemical changes in mulberry due to greyleaf spot |
| title_sort | quantification of relation between disease intensities and physiological and biochemical changes in mulberry due to greyleaf spot |
| url | http://hdl.handle.net/20.500.11937/28357 |