Online Thesis Search Results

TITLE
DEDICATION
DECLARATION
CERTIFICATE
ACKNOWLEDGEMENT
CONTENTS
1. Introduction
1.1 The genus Hevea
1.2 Structural organization of back and distribution of laticifers in Hevea
1.3 Alignment of phloic elements in the bark
1.4 Tapping
1.5 Slope of tapping cut and tissue alignment
1.6 Relevance of the present study
2. Review of literature
2.1 Laticifers
2.1.1 Ontogeny of laticifers
2.1.2 General classification of laticifers
2.2 Laticiferous System in Hevea brasiliensis
2.2.1 Nature and ontogeny
2.2.2 Staining behaviour of laticifers
2.3 Quantitative factors influencing the structure of bark
2.3.1 Girth
2.3.2 Bark thickness
2.3.3 Laticifer rows
2.3.4 Inter row distance between laticifers
2.3.5 Latex vessel density
2.3.6 Frequency of interconnections
2.3.7 Latex vessel diameter
2.3.8 Laticifer Area Index
2.3.9 Phloic rays
2.3.10 Sieve tube
2.3.11 Stone cells
2.4 Histochemistry
3. Materials and Methods
3.1. Materials
3.2. Methodology
3.2.1 Selection of trees
3.2.2 Collection and processing of bark samples
3.2.3 Method of observation
3.3. Characters studied
3.4 Histochemical studies
3.5 Statistical analysis
3.6 Photomicrography
3.7 Image analysis
4. Results
4.1 Anatomy of bark
4.2 Leaning angle of trees
4.3 Tree girth
4.4 Total bark thickness
4.4.1. Soft bark thickness
4.4.2 Inner hard bark thickness
4.4.3 Outer hard bark thickness
4.5 Number of laticifer rows in soft bark and inner hard bark
4.6 Distance between laticifer rows in soft bark and inner hard bark
4.7 Distance between cambium and first row of laticifers
4.7.1. Density of latex vessels contiguous to rays
4.7.2 Density of latex vessels non-contiguous to rays
4.7.3 Total density of latex vessels
4.8 Frequency of interconnections
4.9 Diameter of latex vessels
4.10 Total cross sectional area of laticifers (Laticifer area index)
4.11.1 Angle of inclination of laticifers in soft bark
4.11.2 Angle of inclination of laticifers in inner hard bark
4.11.3 Angle of inclination of phloic rays in soft bark
4.11.4 Angle of inclination of phloic rays in inner hard bark
4.11.5 Inclination of laticifers and phloic rays in Juvenile stage
4.12.1 Frequency of uni-, bi-, and multi-seriate phloic rays contiguous to laticifers in soft bark and inner hard bark
4.12.2 Total frequency of phloic rays contiguous to latex vessels in soft bark and inner hard bark
4.13.1 Frequency of uni-, bi-, and multiseriate rays in latex vessel free zone in soft bark and inner hard bark
4.13.2 Total frequency of phloic rays in LV free zone in soft bark and inner hard bark
4.14.1 Height and width of phloic rays contiguous to laticifers in soft bark and inner hard bark
4.14.2 Height and width of phloic rays in laticifer free zone in soft bark and inner hard bark
4.15.1 Height / width ratio of phloic rays contiguous to laticifers in soft bark and inner hard bark
4.15.2 Height / width ratio of phloic rays in laticifer free zone in soft bark and inner hard bark
4.16 Length and diameter of sieve tubes
4.18 Number of stone cell rows in the inner hard bark
4.19 Area occupied by stone cells per unit cross sectional area in inner hard bark and outer hard bark
4.20 Correlation among bark characters
4.20.1 Correlation among phloic ray characters in soft bark
4.20.2 Correlation among phloic ray characters in inner hard bark
4.20.3 Correlation among all other characters
4.20.4 Correlation between phloic ray characters in soft bark and inner hard bark
4.20.5 Correlation between all other characters and phloic ray characters in soft bark
4.20.6 Correlation between phloic ray characters and all other characters in inner hard bark
4.21 Correlation of characters with latex vessel inclination
4.21.1 Rightward -inclination of laticifers
4.21.2 Leftward inclination of laticifers
4.21.3 Inclination of laticifers to right and leftward direction
4.22 Regression Analysis
4.22.1 Trees having only rightward laticifer inclination
4.22.2 Trees having left and rightward laticifer inclination.
4.23 Histochemical localization
4.23.1 Starch
4.23.2 Total polysaccharides
3.23.3 Lipids
3.23.4. Proteins
3.23.5 Phenols
3.23.6 Tannin
3.23.7 Lignin
5. Discussion
5.1. Tree leaning and girth
5.2. Bark characters
5.2.1 Bark thickness
5.2.2 Latex vessel / laticifers
5.2.2.1 Number of latex vessel rows
5.2.2.2 Distance between latex vessel rows
5.2.2.3 Latex vessel density
5.2.2.4 Frequency of inter-connections
5.2.2.5 Latex vessel diameter
5.2.2.6 Laticifer area index
5.2.3 Ray characters
5.2.3.1 Ray frequency
5.2.3.2 Height, width and H / W ratio
5.2.4 Length and diameter of seive tubes
5.2.5 Stone cells
5.2.6 Inclination of latex vessels
5.3 Histochemical studies
6. Summary.
References
ABBREVIATIONS
List of Tables
List of Figures