. Botany of the living plant. Botany; Plants. DIVISION I. ANGIOSPERMS OR HIGHER FLOWERING PLANTS CHAPTER I. SEED. GERMINATION. FORM OF THE ESTABLISHED PLANT. The Higher Plants are called Seed-Plants, because they bear Seeds. The Seed is a detachable part of the parent Plant, which contains the germ of a new individual. When mature, it is usually hard and dry. It can stand drying up without losing its vitality. In this state it may remain dormant for a considerable period, often for years, and may withstand conditions which would be unfavourable for active life, such as extremes of heat and col
. Botany of the living plant. Botany; Plants. DIVISION I. ANGIOSPERMS OR HIGHER FLOWERING PLANTS CHAPTER I. SEED. GERMINATION. FORM OF THE ESTABLISHED PLANT. The Higher Plants are called Seed-Plants, because they bear Seeds. The Seed is a detachable part of the parent Plant, which contains the germ of a new individual. When mature, it is usually hard and dry. It can stand drying up without losing its vitality. In this state it may remain dormant for a considerable period, often for years, and may withstand conditions which would be unfavourable for active life, such as extremes of heat and cold. But when the conditions are favourable, the active life of the germ, which has been in a state of suspense in the dry seed, may be resumed. The test of vitality of the seed is whether or not it will germinate when exposed to suitable conditions. If a dry seed of a Bean, such as may be bought in a seedsman's shop, be dissected, its parts may be easily recognised. But the dissection will be more readily carried out if it be soaked in water for twenty-four hours. The effect of the soaking will be that it will increase in bulk and in weight. The swelling is due to the imbibition of water, which is a property of dry vegetable tissues. A distinction must be drawn between such swelling and growth. Swelling by imbibition is reversible process, and is not a manifestation of life. A dead b< will swell equally with a living one. If either be dried again, it will shrink back to its original bulk. Growth, on the other hand, is a result of vital activity. It involves, as we shall see in Chapter IX., p. 139, a redistribution of organic material. This is an irreversible proc. 5. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bower, F. O. (Frederick Orpen), 1855-1948; Wardlaw, C. W. (Claude Wilson), 1901-. London, Mac
Size: 1581px × 1581px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookpublis, booksubjectbotany, booksubjectplants
