. Botany of the living plant. Botany; Plants. IRREGULAR NUTRITION 239 It has been established that the red colour which the central tissue of the nodule usually shows is due to haemoglobin. Root nodules are not entirely restricted to the family Leguminosae, but are also found for example on the Alder tree, Bog Myrtle, Sea Buckthorn, and a few other plants. The infecting organisms here are different from that in leguminous types, but they also possess the faculty of nitrogen fixation. Carnivorous Plants. The predatory methods of Carnivorous Plants have been considered from the point of view of
. Botany of the living plant. Botany; Plants. IRREGULAR NUTRITION 239 It has been established that the red colour which the central tissue of the nodule usually shows is due to haemoglobin. Root nodules are not entirely restricted to the family Leguminosae, but are also found for example on the Alder tree, Bog Myrtle, Sea Buckthorn, and a few other plants. The infecting organisms here are different from that in leguminous types, but they also possess the faculty of nitrogen fixation. Carnivorous Plants. The predatory methods of Carnivorous Plants have been considered from the point of view of the reception of stimulus, and the consequent movements, in Chapter IX. Another aspect of them is in respect of nutrition. The plants which show this peculiar habit grow under conditions where the supply of combined nitrogen is difficult, such as in peaty or humous soil, where the native Pinguicula and Drosera are B. Fig. 166. Leaves of Drosera rotundifolia : enlarged. A, in the receptive state before stimulation. B, after stimulation, viewed from above, with tentacles partly incurved. (After Darwin.) habitually found. Venus' Fly Trap and Sarracenia grow on boggy moors in America, while Nepenthes is an epiphyte. In such positions nitrates and other salts would naturally be deficient. On the other hand, all of these plants contain chlorophyll, and can thus construct carbohydrate for themselves. In point of fact the carnivorous habit is not essential to their existence, though experimentally it is found that a moderate supply of animal food is beneficial. Apart from the mere mechanism of capture, which is very various, the physiological treatment of the prize is fairly uniform. Its success depends upon secretion of digestive juices from certain localised,. 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,
Size: 2163px × 1155px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookpublis, booksubjectbotany, booksubjectplants
