Physiological Botany |
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Common terms and phrases
absorbed absorption alcohol amount appears assimilation atmosphere bark become Botanische Zeitung calcic cambium carbonic acid cell-wall cellulose cent changes chemical chlorophyll chlorophyll granules color coloring-matter containing cork cortex cotyledons crystals cutinized Darwin dicotyledons dilute dissolved ducts elements embryo endodermis epidermis evaporation examined experiments fascicles fibres fibro-vascular bundles flower germination given glass glycerin grains green growth hairs hydrochloric acid inches instance iodine layer leaf leaves light liquid mass matters membrane micella microscope minute moisture monocotyledons movement nearly nitric acid nitrogen nucleus observed organs ovule oxygen parenchyma petiole Pfeffer plants pollen pollen-grains pollen-tube portion potassic hydrate produced protein protoplasm radial radicle rays reagents roots Sachs seedlings seeds sér shown side soil soluble solution sometimes species specimen starch stem stoma stomata Strasburger structure substance sugar surface temperature thin threads tion tissues tracheids transpiration tube vegetable wall wood wood-cells woody yellow young
Popular passages
Page 223 - the statical condition. The colloid possesses cnergia. It may be looked upon as the probable primary source of the force appearing in the phenomena of vitality. To the gradual manner in which colloidal changes take place (for they always demand time as an element), may the characteristic protraction of
Page 223 - appears to take the form of cementation in such colloids as can exist at a high temperature. Hence a wide sensibility on the part of colloids to external agents. Another and eminently characteristic quality of colloids is their mutability. Their existence is a continued metastasis. A colloid may
Page 324 - affected it in the same manner ; and I own I had that expectation when I first put a sprig of mint into a glass jar standing inverted in a vessel of water : but when it had continued growing there for some months I found that the air would neither extinguish a candle nor was it
Page 424 - Finally, it is impossible not to be struck with the resemblance between the foregoing movements of plants and many of the actions performed unconsciously by the lower animals. With plants an astonishingly small stimulus suffices ; and even with allied plants one maybe highly sensitive to the slightest
Page 324 - state of the plant ; for though I kept a great number of the fresh leaves of mint in a small quantity of air in which candles had burned out, and changed them frequently, for a long space of time, 1 could perceive no melioration in the state of the air.
Page 416 - he will feel any stone or other obstacle, as well aS any difference in the hardness of the soil, and he will turn from that side ; if the earth is damper on one than on the other side, he will turn thitherward as a better hunting-ground. Nevertheless, after each interruption,
Page 454 - 1172. White flowers are more generally fragrant than those of any other color. ''The fact of a larger proportion of white flowers smelling sweetly may depend in part on those which are fertilized by moths, requiring the double aid of conspicuousness in the dusk and of odor.
Page 424 - moves. Yet plants do not of course possess nerves or a central nervous system ; and we may infer that with animals such structures serve only for the more perfect transmission of impressions, and- for the more complete
Page 27 - of protoplasm, the following remarks by Mohl, who first gave it the name in 1846, are of interest. " If a tissue composed of young cells be left some time in alcohol, or treated with nitric or muriatic acid, a very thin, finely granular membrane becomes detached from the inside of the wall of the
Page 344 - several leaves caught successively three insects each, but most of them were not able to digest the third fly, but died in the attempt. Five leaves, however, digested each three flies and closed over the fourth, but died soon after the fourth capture. Many leaves did not digest even one large insect.