In this article we will discuss about Phototropism. After reading this article you will learn about: 1. Fluence-Response Relations of Phototropism 2. Action Spectra and Photoreceptors 3. Auxin and Phototropism. Fluence-Response Relations of Phototropism: Darwin in his book, 'The Power of Movement in Plants' described that the extreme tip of a grass seedling controls the ability of the whole seedling [...]
In this article we will discuss about Senescence. After reading this article you will learn about: 1. Patterns of Senescence 2. Physiological Changes During Senescence 3. Control. Patterns of Senescence: Senescence in plants shows a wide range of Patterns. (i) Cellular Senescence: Individual cells or a small number of cells of an organism may undergo senescence while the other cells [...]
In this article we will discuss about Gibberellins. After reading this article you will learn about: 1. Biosynthesis of Gibberellins 2. Responses of Plants to Gibberellins 3. Mode of Action 4. Bioassay Methods. Biosynthesis of Gibberellins: Gibberellins are cyclic di-terpenoids or tetraisoprenoids. Biosynthesis of gibberellins follows the basic pathway of isoprenoid biosynthesis. All the carbon atoms of isoprene (C5H8) are [...]