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These propagate corm-forming plants. A number of species replace corms every year by growing a new corm. This process starts after the shoot develops fully expanded leaves. The new corm forms at the shoot base just above the old corm. As the new corm grows, short stolons appear that end with the newly growing small cormels. As the plants grow ...
Corms are solid enlarged underground stems that store nutrients in their fleshy and solid stem tissue and are surrounded by papery leaves. Corms differ from bulbs in that their centers consists of solid tissue while bulbs consist of layered leaves. [24] Examples of plants that use corms are gladiolus and taro.
Cormus (PL: cormi) (from ancient Greek: κορμός, kormόs, 'stem') is the appearance of a plant that belong to Cormophyte (Pteridophyte and Spermatophyte). [1] [2] In cormus, the vegetative apparatus is no longer a thallus, such as algae, that cannot be distinctly differentiated. [1]
A geophyte (earth+plant) is a plant with an underground storage organ including true bulbs, corms, tubers, tuberous roots, enlarged hypocotyls, and rhizomes. Most plants with underground stems are geophytes but not all plants that are geophytes have underground stems. Geophytes are often physiologically active even when they lack leaves.
It is the most widely cultivated species of several plants in the family Araceae that are used as vegetables for their corms, leaves, stems and petioles. Taro corms are a food staple in African, Oceanic, East Asian, Southeast Asian and South Asian cultures (similar to yams). Taro is believed to be one of the earliest cultivated plants.
Chinese water chestnut is usually not very prone to pests; [8] nevertheless, some animals and fungi may attack the plant: Water fowl may damage the stems and corms, especially when plants are young. [7] Similarly, rodents and grazing animals pose a threat to the Chinese water chestnut, which may be discouraged by keeping the paddy inundated. [7]
Both sexual and asexual means are used to increase the number of plants; seeds and multiplication of corms are the most common means of production, but tissue culture can be used, [114] most commonly for saffron crocus. New corms are formed on top of the older corm which withers away, and cormels are produced from axillary buds. [112]
The corm produces lateral buds that give rise to side-corms (cormels, suckers) or stolons (long runners, creeping rhizomes) depending on the species and variety. Cocoyams commonly reach in excess of one metre (three feet) in height and although they are perennials, they are often grown as annuals, harvested after one season.