D factor
| C4 plant | <plant biology> Plants found principally in hot climates whose initial fixation of carbon dioxide in photosynthesis is by the HSK pathway. The enzyme responsible is PEP carboxylase, whose products contain four carbon atoms. Subsequently the carbon dioxide is released and re fixed by the Calvin Benson cycle. The presence of the HSK pathway permits efficient photosynthesis at high light intensities and low carbon dioxide concentrations. most species of this type have little or no photorespiration. (21 Mar 1998) |
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| vascular plant | A plant which possesses a well-developed system of conducting tissue to transport water, mineral salts and sugars. (09 Oct 1997) |
| gene expression regulation, plant | Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in plants. (12 Dec 1998) |
| genes, plant | The hereditary material of plants. (12 Dec 1998) |
| genes, structural, plant | DNA sequences that code for RNA and for the proteins required for the enzymatic and structural function of plant cells. (12 Dec 1998) |
| genome, plant | The complete gene complement contained in a set of chromosomes in a plant. (12 Dec 1998) |
| RNA, plant | Ribonucleic acid in plants having regulatory and catalytic roles as well as involvement in protein synthesis. (12 Dec 1998) |
| photosynthetic reaction centre, plant | A system consisting of proteins and cofactors which facilitates light energy and electron transfer in plants. (12 Dec 1998) |
| water plant | A plant that grows in water; an aquatic plant. Source: Websters Dictionary (01 Mar 1998) |
| pioneer plant | Plants that colonise disturbed sites or raw mineral soils and make them easier for succeeding plants species to grow in. (09 Oct 1997) |
| combined-cycle power plant | The combination of a gas turbine and a steam turbine in an electric generation plant. The waste heat from the gas turbine provides the heat energy for the steam turbine. (05 Dec 1998) |
| plant | 1. To put in the ground and cover, as seed for growth; as, to plant maize. 2. To set in the ground for growth, as a young tree, or a vegetable with roots. "Thou shalt not plant thee a grove of any trees." (Deut. Xvi. 21) 3. To furnish, or fit out, with plants; as, to plant a garden, an orchard, or a forest. 4. To engender; to generate; to set the germ of. "It engenders choler, planteth anger." (Shak) 5. To furnish with a fixed and organised population; to settle; to establish; as, to plant a colony. "Planting of countries like planting of woods." (Bacon) 6. To introduce and establish the principles or seeds of; as, to plant Christianity among the heathen. 7. To set firmly; to fix; to set and direct, or point; as, to plant cannon against a fort; to plant a standard in any place; to plant one's feet on solid ground; to plant one's fist in another's face. 8. To set up; to install; to instate. "We will plant some other in the throne." (Shak) Origin: AS. Plantian, L. Plantare. See Plant. To perform the act of planting. "I have planted; Apollos watered." (1 Cor. Iii. 6) 1. A vegetable; an organised living being, generally without feeling and voluntary motion, and having, when complete, a root, stem, and leaves, though consisting sometimes only of a single leafy expansion, or a series of cellules, or even a single cellule. Plants are divided by their structure and methods of reproduction into two series, phaenogamous or flowering plants, which have true flowers and seeds, and cryptogamous or flowerless plants, which have no flowers, and reproduce by minute one-celled spores. In both series are minute and simple forms and others of great size and complexity. As to their mode of nutrition, plants may be considered as self-supporting and dependent. Self-supporting plants always contain chlorophyll, and subsist on air and moisture and the matter dissolved in moisture, and as a general rule they excrete oxygen, and use the carbonic acid to combine with water and form the material for their tissues. Dependent plants comprise all fungi and many flowering plants of a parasitic or saprophytic nature. As a rule, they have no chlorophyll, and subsist mainly or wholly on matter already organised, thus utilizing carbon compounds already existing, and not excreting oxygen. But there are plants which are partly dependent and partly self-supporting. The movements of climbing plants, of some insectivorous plants, of leaves, stamens, or pistils in certain plants, and the ciliary motion of zoospores, etc, may be considered a kind of voluntary motion. 2. A bush, or young tree; a sapling; hence, a stick or staff. "A plant of stubborn oak." 3. The sole of the foot. "Knotty legs and plants of clay." 4. The whole machinery and apparatus employed in carrying on a trade or mechanical business; also, sometimes including real estate, and whatever represents investment of capital in the means of carrying on a business, but not including material worked upon or finished products; as, the plant of a foundry, a mill, or a railroad. 5. A plan; an artifice; a swindle; a trick. "It was n't a bad plant, that of mine, on Fikey." (Dickens) 6. <zoology> An oyster which has been bedded, in distinction from one of natural growth. A young oyster suitable for transplanting. Plant bug, any small hemipterous insect which infests plants, especially those of the families Aphidae and Psyllidae; an aphid. Origin: AS. Plante, L. Planta. Source: Websters Dictionary (01 Mar 1998) |
| plant antitoxin | Antitoxin specific for a phytotoxin. (05 Mar 2000) |
| plant association | A grouping of plant species, or a plant community, that recurs across the landscape. Plant associations are used as indicators of environmental conditions such as temperature, moisture, light, etc. (05 Dec 1998) |
| plant-cane | A stalk or shoot of sugar cane of the first growth from the cutting. The growth of the second and following years is of inferior quality, and is called rattoon. Source: Websters Dictionary (01 Mar 1998) |