Lectures On the Physiology of Plants
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In our eReader you can find the full English version of the book. Read Lectures On the Physiology of Plants Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Lectures On the Physiology of Plants
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That roots as well as shoot-buds appear at the basal end of a cut-off" leaf is explained, according to this view of the matter, simply by supposing that during the assimilatory activity of the leaf, and in accordance with its normal function, shoot-forming as well as root-forming substances are continually passing from the leaf through the petiole into the shoot-axis. If then the petiole is cut off, this customary movement proceeds no further, being, as in the case of cut-off pieces in general,... to a certain extent checked at the section, and buds as well as roots will grow out from the petiole near the section. These considerations then show that effective causes are given in the organisation and vital activity of the plant itself by which the places of origin of new roots and shoots are determined.
A second cause, however, has already become known to us in the examples quoted above ; this is the influence of gravitation, which, so far as we are as yet informed, affects different plants in very different degrees, in that new shoot-buds arise more easily in cut-off portions on the ends directed upwards, new roots on those directed downwards.
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You can find similar books in the "Read Also" column, or choose other free books by Sachs, Julius, 1832-1897 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
That roots as well as shoot-buds appear at the basal end of a cut-off" leaf is explained, according to this view of the matter, simply by supposing that during the assimilatory activity of the leaf, and in accordance with its normal function, shoot-forming as well as root-forming substances are continually passing from the leaf through the petiole into the shoot-axis. If then the petiole is cut off, this customary movement proceeds no further, being, as in the case of cut-off pieces in general,... to a certain extent checked at the section, and buds as well as roots will grow out from the petiole near the section. These considerations then show that effective causes are given in the organisation and vital activity of the plant itself by which the places of origin of new roots and shoots are determined.
A second cause, however, has already become known to us in the examples quoted above ; this is the influence of gravitation, which, so far as we are as yet informed, affects different plants in very different degrees, in that new shoot-buds arise more easily in cut-off portions on the ends directed upwards, new roots on those directed downwards.
What to read after Lectures On the Physiology of Plants?
You can find similar books in the "Read Also" column, or choose other free books by Sachs, Julius, 1832-1897 to read onlineMoreLess
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