. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 1326 PHYSIOLOGY PHYSIOLOGY concerned in the conduction o£ t!ic ilif;tsted or leaf- formed foods to other parts. Seed Production.âSo far as we linow, the ultimate function of a plant in nature is to produce seeds or to reproduce its kind. It matters not how far the horti- culturist may have diverted this natura
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 1326 PHYSIOLOGY PHYSIOLOGY concerned in the conduction o£ t!ic ilif;tsted or leaf- formed foods to other parts. Seed Production.âSo far as we linow, the ultimate function of a plant in nature is to produce seeds or to reproduce its kind. It matters not how far the horti- culturist may have diverted this natural function in particular instances, in general the sum of the physi- ological activities is directed to seed-production. Much energy is directed to the development of form and color in the flower, also of fragrance and odor, and there are deep-seated physiological processes connected with pol- len and ovule production, with pollination, fertilization (see p. 579), and the subsequent development of the seed. Seeds are, as a rule, richer in nitrogenous matter than other parts of the plant. Likewise, in phosphorus and magnesium salts there is a marked increase m the seed. Of these last-named substances, there is a migra- tion, as it were, from the older parts to the region of seed formation, and finally to the seed On the other hand, the salts of lime gradually increase in quantit\ in the older tissues, particularlj in the old assimildtorj The Living Protoplasm the Seat of Vital Action.â Physiological activities cannot be thoroughh studu il by the use of the plant as a whole or bj the use iit the organs as particular parts of a complex whiik The final seat of all the plant activities resides m the living protoplasm of the cells composing the plant. Excejit as serving purely mechanical purposes, the old heart wood and bark of trees are inactive, and they contain no liv- ing substance. They are made niereh of the walls of cells which once constitutf d In in.,' puts The
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