In this article we will discuss about the two principal types of stelar organisation in vascular plants: 1. Protostele 2. Siphonostele. Type # 1. Protostele: It is the simplest and most primitive type of stele. The vascular cylinder consists of solid core of xylem surrounded by phloem, pericycle and endodermis. There is no pith e.g., Selaginella, Lycopodium, Lygodium, Gleichenia etc. [...]
The following points highlight the thirty-one important symptoms of plant diseases. Some of the symptoms are: 1. Anthracnose 2. Blight 3. Callus 4. Cankers 5. Chlorosis 6. Curling 7. Damping-off 8. Die-back 9. Discolouration 10. Dwarfing 11. Edema 12. Elongated Internodes 13. Etiolation 14. Exudation 15. Fasciculation 16. Galls and Tumours 17. Mosaic 18. Mummification 19. Phyllody 20. Prolepsis and [...]
The upcoming discussion will update you about the difference between Mitosis and Meiosis. Difference # Mitosis: 1. It occurs continuously in the body or somatic cells. 2. Its main purpose is the growth in the body. 3. The whole process completes in one sequence or one phase. Prophase: 4. It completes in a short period, and not divided into subsequent [...]