Practical Botany For Beginners by Frederick Orpen BowerPractical Botany For Beginners by Frederick Orpen Bower

Practical Botany For Beginners

byFrederick Orpen Bower

Paperback | May 18, 2012

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 Excerpt: swell and dissolve. Mount another section in alcohol or in glycerine, and, having observed the crystalloids, irrigate with a saturated solution of common salt: this also will dissolve the crystalloids. GERMINATION. (A) Dicotyledons. (a) Examine seedlings of Helianthus which have been germinating for different periods from one day to one week, and observe the following points in the process of germination:--1. The internal parts of the fruit swell, and cause the brittle pericarp to split longitudinally. 2. The radicle protrudes, and curves downwards. 3. The hypocotyledonary stem elongates, so that the pericarp and seed-coat are carried upwards by the cotyledons, which remain inclosed by them for a considerable time. 4. The coats of the fruit fall from the cotyledons, which soon turn green, and expand as assimilating leaves, with the plumule seated between them. 5. The plumule develops leaves, which expand in succession. 6. The radicle has meanwhile elongated, and produced lateral roots. Notice that when the young root is removed from the soil many particles adhere to it, especially at some distance from the apex: these are held by the root-hairs which attach themselves closely to the particles of soil. (b) With the above compare seedlings of Ricinus in various stages of germination: in the main features the results are the same, but note especially that the endosperm remains for a long period in close connection with the cotyledons, and that as the seedling grows that tissue loses its firmness and density, owing to the abstraction of the nutritive substances stored in it, and their transfer through the cotyledons to the seedling. (c) It.will be found useful to compare the germination of other seeds also, e.g. the Broad Bean, Kidney Bean, Cucumber or Gourd...
Title:Practical Botany For BeginnersFormat:PaperbackDimensions:80 pages, 9.69 × 7.44 × 0.17 inPublished:May 18, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217532322

ISBN - 13:9780217532327