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In botany, drought tolerance is the ability by which a plant maintains its biomass production during arid or drought conditions. [ 1 ] [ 2 ] [ 3 ] Some plants are naturally adapted to dry conditions , surviving with protection mechanisms such as desiccation tolerance , detoxification , or repair of xylem embolism. [ 3 ]
Mesophytes do not have any specific morphological adaptations. They usually have broad, flat and green leaves; an extensive fibrous root system to absorb water; and the ability to develop perennating organs such as corms, rhizomes and bulbs to store food and water for use during drought. [citation needed]
Heat tolerance may be displayed alongside cold-hardiness, such as in the American Horticultural Society's "Heat Zones". See Thermoregulation § In plants and Breeding for heat stress tolerance . For drought tolerance , see Drought § Impact on crops and Breeding for drought stress tolerance .
Another physical option for control is through fires. Some species of mesquite are fire-sensitive, while others are fire-tolerant. For those that are fire-sensitive, this method can be highly effective, but those that are fire-tolerant require hot and intense fires to be effective. In Australia, scientists are trying biological control methods.
This high sunlight is too severe for most species and restricts growth. Few understory plants are found in these communities and are usually restricted to drought-tolerant acacia species and the native cherry (Exocarpus cupressiformis). There are often many grasses (and bracken) in these forests and a sparse hard-leafed shrub layer. Groundcover ...
It has a moderate drought tolerance. [13] It is ideally grown in areas with an annual rainfall ranging from 1000–2000 mm and a temperature of 15-31 degrees Celsius. [13] This plant does not require a large amount of nutrients. [18] As a weed it spreads rapidly, which allows its use as a forage crop in grazing or cut-and-carry systems. [19]
His pupil, Theophrastus, in Historia Plantarum (c. 350 BC), was the first who formally recognized plant habits: trees, shrubs and herbs. [ 3 ] Some earlier authors (e.g., Humboldt , 1806) did classify species according to physiognomy, [ 4 ] [ 5 ] [ 6 ] but were explicit about the entities being merely practical classes without any relation to ...
Plants absorb water from the soil, which then evaporates from their shoots and leaves; this process is known as transpiration.If placed in a dry environment, a typical mesophytic plant would evaporate water faster than the rate of water uptake from the soil, leading to wilting and even death.