By Paula J. Rudall
Within the 3rd version of her profitable textbook, Paula Rudall offers a finished but succinct creation to the anatomy of flowering crops. completely revised and up-to-date all through, the publication covers all elements of comparative plant constitution and improvement, prepared in a sequence of chapters at the stem, root, leaf, flower, seed and fruit. inner buildings are defined utilizing magnification aids from the easy hand-lens to the electron microscope. various references to contemporary topical literature are incorporated, and new illustrations replicate quite a lot of flowering plant species. The phylogenetic context of plant names has additionally been up to date because of greater figuring out of the relationships between flowering crops. This in actual fact written textual content is perfect for college students learning a variety of classes in botany and plant technology, and can be an exceptional source for pro and novice horticulturists.
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Additional info for Anatomy of Flowering Plants: An Introduction to Structure and Development
G. shoot thorns) become determinate. The vegetative shoot apical meristem is typically dome-shaped and partitioned by distinct zones of activity (Fig. 1). In many species, the outermost two (sometimes more) cell layers (L1 and L2, collectively termed the tunica) are maintained predominantly by anticlinal cell divisions. The corpus (L3), in which cell divisions are randomly oriented, is the region proximal to the tunica. Thus, the outer layers contribute to surface growth and the inner layers to an increase in volume, though there is often slight intergradation between the two layers20.
The pattern of periderm formation largely dictates the appearance of the bark of a woody plant. For example, the smooth papery bark of a young silver birch tree (Betula pendula) is formed because the periderm initially expands tangentially with the increase in stem diameter, but later flakes off in thin papery sheets as 41 42 Stem abscission bands of thin-walled cells are formed. In the trunk of cork oak (Quercus suber), the initial phellogen may continue activity indefinitely, and produces seasonal growth rings.
This is termed diffuse secondary growth. g. Agave, Aloe, Cordyline, Yucca) further increase in stem thickness is achieved by means of a secondary thickening meristem (STM) (Fig. 14). The STM is essentially similar to the PTM in that it is located in the pericyclic region and produces radial derivatives. However, it is active further from the primary apex and produces secondary vascular bundles that are often amphivasal and radially elongated. g. 13 Primary thickening meristem (PTM): diagram of longitudinal section of the crown of a typical thick-stemmed monocot, showing orientation and extent of radial PTM derivatives.
Anatomy of Flowering Plants: An Introduction to Structure and Development by Paula J. Rudall