Underground stem

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Underground stems are modified plant parts that derive from stem tissue but exist under the soil surface. [1] They function as storage tissues for food and nutrients, facilitate the propagation of new clones, and aid in perennation (survival from one growing season to the next). [2] Types of underground stems include bulbs, corms, rhizomes, stolons, and tubers. [3] [4] [5] [6] [7]

Contents

Plants have two structures or axes of growth, which can be best seen from seed germination and growth. Seedlings develop two axes of growth: stems, which develop upward out of the soil, and roots, which develop downward. The roots are modified to have root hairs and branch indiscriminately with cells that take in water and nutrients, while the stems are modified to move water and nutrients to and from the leaves and flowers. [8] [9] [10] Stems have nodes with buds where leaves and flowers arise at specific locations, while roots do not. Plants use underground stems to multiply by asexual reproduction and to survive from one year to the next, usually through dormancy. [11] Some plants produce stems modified to store energy and preserve a location of potential growth to survive a cold or dry period which normally is a period of inactive growth, and when that period is over the plants resume new growth from the underground stems. [12] [13] [14] [15]

Being underground protects the stems from the elements during the dormancy period, such as freezing and thawing in winter, extreme heat and drought in summer, or other potentially harmful elements such as fire. They can also protect plants from heavy grazing pressure from animals, the plant might be eaten to the ground but new growth can occur from below ground stem that can not be reached by the herbivores. [16] [17] [18] [19] Several plants, including weedy species, [20] use underground stems to spread and colonize large areas, [21] since the stems do not have to be supported or strong, less energy and resources are needed to produce these stems and often these plants have more mass underground than above ground.

Types of underground stems

Different forms of underground stems include: [22]

A number of underground stems are consumed by people including; onion, potato, ginger, yam and taro. [24] [25] [26] [27] [28] [29] [30]

The below-ground stems of grasses have scales, while roots are smooth without scales. [31]

Geophyte

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. They can survive during adverse environmental conditions by going into a state of quiesce and later resume growth from their storage organs, which contain reserves of carbohydrates and water when the environmental conditions are favorable again. [32] [33] [34] [35] [36] [37]

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<span class="mw-page-title-main">Bulb</span> Short plant stem with fleshy leaves or leaf bases for food storage and water

In botany, a bulb is structurally a short stem with fleshy leaves or leaf bases that function as food storage organs during dormancy.

<i>Canna</i> (plant) Genus of flowering plants in the family Cannaceae

Canna or canna lily is the only genus of flowering plants in the family Cannaceae, consisting of 10 species. All of the genus's species are native to the American tropics and naturalized in Europe, India and Africa in the 1860s. Although they grow native to the tropics, most cultivars have been developed in temperate climates and are easy to grow in most countries of the world, as long as they receive at least 6–8 hours average sunlight during the summer, and are moved to a warm location for the winter. See the Canna cultivar gallery for photographs of Canna cultivars.

<span class="mw-page-title-main">Tuber</span> Storage organ in plants

Tubers are a type of enlarged structure used as storage organs for nutrients in some plants, usually stems, but some definitions refer to roots. Tubers help plants perennate, provide energy and nutrients, and are a means of asexual reproduction.

<span class="mw-page-title-main">Rhizome</span> Underground stem in which various plants asexually reproduce via budding

In botany and dendrology, a rhizome is a modified subterranean plant stem that sends out roots and shoots from its nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from axillary buds and grow horizontally. The rhizome also retains the ability to allow new shoots to grow upwards.

<span class="mw-page-title-main">Germination</span> Process by which an organism grows from a spore or seed

Germination is the process by which an organism grows from a seed or spore. The term is applied to the sprouting of a seedling from a seed of an angiosperm or gymnosperm, the growth of a sporeling from a spore, such as the spores of fungi, ferns, bacteria, and the growth of the pollen tube from the pollen grain of a seed plant.

<span class="mw-page-title-main">Vegetative reproduction</span> Asexual method of reproduction in plants

Vegetative reproduction is any form of asexual reproduction occurring in plants in which a new plant grows from a fragment or cutting of the parent plant or specialized reproductive structures, which are sometimes called vegetative propagules.

<i>Phragmites</i> Genus of grasses commonly known as reeds

Phragmites is a genus of four species of large perennial reed grasses found in wetlands throughout temperate and tropical regions of the world.

<span class="mw-page-title-main">Perennial</span> Plant that lives for more than two years

A perennial plant or simply perennial is a plant that lives more than two years. The term is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also widely used to distinguish plants with little or no woody growth from trees and shrubs, which are also technically perennials.Notably, it is estimated that 94% of plant species fall under the category of perennials, underscoring the prevalence of plants with lifespans exceeding two years in the botanical world

<i>Nelumbo nucifera</i> Species of aquatic flowering plant

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A storage organ is a part of a plant specifically modified for storage of energy (generally in the form of carbohydrates) or water. Storage organs often grow underground, where they are better protected from attack by herbivores. Plants that have an underground storage organ are called geophytes in the Raunkiær plant life-form classification system. Storage organs often, but not always, act as perennating organs which enable plants to survive adverse conditions.

<span class="mw-page-title-main">Stolon</span> Horizontal connections between organisms

In biology, stolons, also known as runners, are horizontal connections between parts of an organism. They may be part of the organism, or of its skeleton. Typically, animal stolons are exoskeletons.

<i>Asclepias syriaca</i> Species of flowering plant

Asclepias syriaca, commonly called common milkweed, butterfly flower, silkweed, silky swallow-wort, and Virginia silkweed, is a species of flowering plant. It is native to southern Canada and much of the United States east of the Rocky Mountains, excluding the drier parts of the prairies. It is in the genus Asclepias, the milkweeds. It grows in sandy soils as well as other kinds of soils in sunny areas.

<i>Uniola paniculata</i> Species of flowering plant

Uniola paniculata, also known as sea oats, seaside oats, araña, and arroz de costa, is a tall subtropical grass that is an important component of coastal sand dune and beach plant communities in the southeastern United States, eastern Mexico and some Caribbean islands.

<span class="mw-page-title-main">Parasitic plant</span> Type of plant that derives some or all of its nutritional requirements from another living plant

A parasitic plant is a plant that derives some or all of its nutritional requirements from another living plant. They make up about 1% of angiosperms and are found in almost every biome. All parasitic plants develop a specialized organ called the haustorium, which penetrates the host plant, connecting them to the host vasculature – either the xylem, phloem, or both. For example, plants like Striga or Rhinanthus connect only to the xylem, via xylem bridges (xylem-feeding). Alternately, plants like Cuscuta and some members of Orobanche connect to both the xylem and phloem of the host. This provides them with the ability to extract resources from the host. These resources can include water, nitrogen, carbon and/or sugars. Parasitic plants are classified depending on the location where the parasitic plant latches onto the host, the amount of nutrients it requires, and their photosynthetic capability. Some parasitic plants can locate their host plants by detecting volatile chemicals in the air or soil given off by host shoots or roots, respectively. About 4,500 species of parasitic plants in approximately 20 families of flowering plants are known.

Plant reproduction is the production of new offspring in plants, which can be accomplished by sexual or asexual reproduction. Sexual reproduction produces offspring by the fusion of gametes, resulting in offspring genetically different from either parent. Asexual reproduction produces new individuals without the fusion of gametes, resulting in clonal plants that are genetically identical to the parent plant and each other, unless mutations occur.

<i>Osmundastrum</i> Species of fern

Osmundastrum is genus of leptosporangiate ferns in the family Osmundaceae with one living species, Osmundastrum cinnamomeum, the cinnamon fern. It is native to the Americas and eastern Asia, growing in swamps, bogs and moist woodlands.

<span class="mw-page-title-main">Succulent plant</span> Plants adapted to arid conditions

In botany, succulent plants, also known as succulents, are plants with parts that are thickened, fleshy, and engorged, usually to retain water in arid climates or soil conditions. The word succulent comes from the Latin word sucus, meaning "juice" or "sap".

<span class="mw-page-title-main">Ornamental bulbous plant</span> Herbaceous perennials with underground storage parts grown for ornamental purposes

Ornamental bulbous plants, often called ornamental bulbs or just bulbs in gardening and horticulture, are herbaceous perennials grown for ornamental purposes, which have underground or near ground storage organs. Botanists distinguish between true bulbs, corms, rhizomes, tubers and tuberous roots, any of which may be termed "bulbs" in horticulture. Bulb species usually lose their upper parts during adverse conditions such as summer drought and heat or winter cold. The bulb's storage organs contain moisture and nutrients that are used to survive these adverse conditions in a dormant state. When conditions become favourable the reserves sustain a new growth cycle. In addition, bulbs permit vegetative or asexual multiplication in these species. Ornamental bulbs are used in parks and gardens and as cut flowers.

<i>Nothia aphylla</i> Extinct species of spore-bearing plant

Nothia was a genus of Early Devonian vascular plants whose fossils were found in the Rhynie chert in Scotland. It had branching horizontal underground stems (rhizomes) and leafless aerial stems (axes) bearing lateral and terminal spore-forming organs (sporangia). Its aerial stems were covered with small 'bumps' (emergences), each bearing a stoma. It is one of the best described early land plants. Its classification remains uncertain, although it has been treated as a zosterophyll. There is one species, Nothia aphylla.

<span class="mw-page-title-main">Stratification (vegetation)</span> Vertical layering of a habitat

Stratification in the field of ecology refers to the vertical layering of a habitat; the arrangement of vegetation in layers. It classifies the layers of vegetation largely according to the different heights to which their plants grow. The individual layers are inhabited by different animal and plant communities (stratozones).

References

  1. ↑ QA International Collectif (2007). The Visual Guide to Understanding Plants & the Vegetable Kingdom - Plants & the Vegetable Kingdom. Québec Amerique. pp. 35–. ISBN   978-2-7644-0894-0.
  2. ↑ V. B. Rastogi (1 January 1997). Modern Biology. Pitambar Publishing. pp. 22–. ISBN   978-81-209-0442-2.
  3. ↑ "3: Nasal Olfactory Organs andOlfactory Bulbs in Blennies", The Biology of Blennies, CRC Press, pp. 199–226, 2009-01-05, doi:10.1201/b10301-14, ISBN   9780429063527 , retrieved 2023-09-27
  4. ↑ Nursery stock, BSI British Standards, doi:10.3403/00174760 , retrieved 2023-09-27
  5. ↑ Rosenberg, Noah (2016). "From Trees to Rhizomes". Perspectives in Biology and Medicine. 59 (2): 246–252. doi:10.1353/pbm.2017.0009. ISSN   1529-8795. PMID   37765717. S2CID   78995989.
  6. ↑ Emschermann, Peter (1987-01-28). "Creeping propagation stolons - an effective propagation system of the freshwater entoproct Urnatella gracilis LEIDY [Barentsiidae)". Archiv für Hydrobiologie. 108 (3): 439–448. doi:10.1127/archiv-hydrobiol/108/1987/439. ISSN   0003-9136. S2CID   89189547.
  7. ↑ Figure 3 in Chapagain, Deep J.; Meilby, Henrik; Ghimire, Suresh K. (2019). "Plant density and life history traits of Aconitum spicatum in North-central Nepal: Effects of elevation and anthropogenic disturbances". PeerJ. 7: e7574. doi: 10.7717/peerj.7574 . PMC   6743441 . PMID   31565560.
  8. ↑ Lew, Roger R. (2000), "Electrobiology of Root Hairs", Root Hairs, Tokyo: Springer Japan, pp. 115–139, doi:10.1007/978-4-431-68370-4_8, ISBN   978-4-431-68372-8 , retrieved 2023-09-27
  9. ↑ Ungar, Irwin A. (2017-11-01), "Seed Germination and Seed-Bank Ecology in Halophytes", Seed Development and Germination, Routledge, pp. 599–628, doi:10.1201/9780203740071-23, ISBN   978-0-203-74007-1 , retrieved 2023-09-27
  10. ↑ Table 1 in Yang, Lijuan; Yang, Kejun (2020). "Biological function of Klebsiella variicola and its effect on the rhizosphere soil of maize seedlings". PeerJ. 8: e9894. doi: 10.7717/peerj.9894 . PMC   7501803 . PMID   32995084.
  11. ↑ Ralph Persad (1 May 1994). Agricultural Science for the Caribbean. Nelson Thornes. pp. 26–. ISBN   978-0-17-566394-1.
  12. ↑ Linda Berg (23 March 2007). Introductory Botany: Plants, People, and the Environment, Media Edition. Cengage Learning. pp. 146–. ISBN   978-0-534-46669-5.
  13. ↑ Nickell, Louis G. (1982), "Axillary Buds", Plant Growth Regulators, Berlin, Heidelberg: Springer Berlin Heidelberg, pp. 45–46, doi:10.1007/978-3-642-68204-9_9, ISBN   978-3-642-68206-3 , retrieved 2023-09-27
  14. ↑ "Vochysia assua: Fernandez, E., Arguello, L., Jordão, L., Martinelli, G., Shimizu, G. & Gonçalves, D." 2020-05-22. doi: 10.2305/iucn.uk.2020-3.rlts.t180255381a180255383.pt . S2CID   243376638.{{cite journal}}: Cite journal requires |journal= (help)
  15. ↑ Specification for percussive rock-drilling bits, rods and stems. Integral stems, BSI British Standards, doi:10.3403/30309158u , retrieved 2023-09-27
  16. ↑ Seed Dormancy. 2020. doi: 10.3390/books978-3-03943-654-5 . ISBN   978-3-03943-654-5.
  17. ↑ Scerri, Eric (2013-07-18), "From Missing Elements to Synthetic Elements", A Tale of Seven Elements, Oxford University Press, doi:10.1093/oso/9780195391312.003.0015, ISBN   978-0-19-539131-2 , retrieved 2023-09-27
  18. ↑ Figure 6 in Liu, Wenting; Wang, Tianle; Zhang, Shuang; Ding, Lijun; Wei, Zhijun (2018). "Grazing influences Stipa breviflora seed germination in desert grasslands of the Inner Mongolia Plateau". PeerJ. 6: e4447. doi: 10.7717/peerj.4447 . PMC   5835349 . PMID   29507838.
  19. ↑ "Acknowledgment to Reviewers of Animals in 2020". Animals. 11 (2): 313. 2021-01-27. doi: 10.3390/ani11020313 . ISSN   2076-2615. PMC   7911586 .
  20. ↑ "Weedy species, relics, and ghosts", The End of the Wild, The MIT Press, 2006, doi:10.7551/mitpress/2733.003.0003, ISBN   9780262300049 , retrieved 2023-09-27
  21. ↑ Spilsbury, Richard; Spilsbury, Louise (2008). Plant Habitats. Heinemann-Raintree Library. ISBN   978-1-4329-1502-5.
  22. ↑ Ray F. Evert; Susan E. Eichhorn; William A. Russin (22 April 2005). Laboratory Topics in Botany. W. H. Freeman. pp. 23–. ISBN   978-0-7167-6205-8.
  23. ↑ Marques, Isabel; Nieto Feliner, Gonzalo; Martins-Loução, Maria Amélia; Fuertes Aguilar, Javier (2011-11-01). "Fitness in Narcissus hybrids: low fertility is overcome by early hybrid vigour, absence of exogenous selection and high bulb propagation". Journal of Ecology. 99 (6): 1508–1519. Bibcode:2011JEcol..99.1508M. doi: 10.1111/j.1365-2745.2011.01876.x . ISSN   1365-2745.
  24. ↑ The New Encyclopaedia Britannica. Encyclopaedia Britannica. 1974. pp. 726–. ISBN   978-0-85229-290-7.
  25. ↑ Persad, Ralph (November 2014). Agricultural Science for the Caribbean 1. Nelson Thornes. ISBN   978-0-17-566394-1.
  26. ↑ Red Onion. Oxford Music Online. Oxford University Press. 2003. doi:10.1093/gmo/9781561592630.article.j372700.
  27. ↑ Takamine, Kazunori (2019), "Sweet potato fermentation food (sweet potato shochu)", Sweet Potato, Elsevier, pp. 325–347, doi:10.1016/b978-0-12-813637-9.00012-0, ISBN   9780128136379, S2CID   182865693 , retrieved 2023-09-27
  28. ↑ "Ginger & Rosa". Ginger & Rosa. 2012. doi:10.5040/9781350922648.
  29. ↑ Figure 3 in Zhang, Erjin; Shen, Wenyuan; Jiang, Weijie; Li, Wenlong; Wan, Xiaping; Yu, Xurun; Xiong, Fei (2023). "Research progress on the bulb expansion and starch enrichment in taro (Colocasia esculenta (L). Schott)". PeerJ. 11: e15400. doi: 10.7717/peerj.15400 . PMC   10257899 . PMID   37309370.
  30. ↑ Asfaw, Asrat; Agre, Paterne; Nwachukwu, Chidinma; Olasanmi, Bunmi; Obidiegwu, Jude; Nwachukwu, Emmanuel; Adebola, Patrick; De Koeyer, David (2020). "Sample Preservation and Plant Sex Prediction in White Guinea Yam (Dioscorea rotundata Poir.) Seedlings". Preprints. doi: 10.20944/preprints202002.0187.v1 .
  31. ↑ Bessey, Charles Edwin; Webber, Herbert John (1890). Report of the Botanist on the Grasses and Forage Plants, and the Catalogue of Plants [of Nebraska]. State journal Company.
  32. ↑ "geophyte, n.", Oxford English Dictionary, Oxford University Press, 2023-03-02, doi:10.1093/oed/1063681943 , retrieved 2023-09-27
  33. ↑ Figure 3 in Wang, Hongfei; Shang, Qingmao (2020). "The combined effects of light intensity, temperature, and water potential on wall deposition in regulating hypocotyl elongation of Brassica rapa". PeerJ. 8: e9106. doi: 10.7717/peerj.9106 . PMC   7258941 . PMID   32518720.
  34. ↑ Classification of environmental conditions. Environmental conditions appearing in nature, BSI British Standards, doi:10.3403/bs7527 , retrieved 2023-09-27
  35. ↑ Brimacombe, J. S., ed. (1973), "Plant and algal polysaccharides", Carbohydrate Chemistry, vol. 6, Cambridge: Royal Society of Chemistry, pp. 197–227, doi:10.1039/9781847552839-00197, ISBN   978-0-85186-052-7 , retrieved 2023-09-27
  36. ↑ Figure 3 in López-González, Cristal; Juárez-Colunga, Sheila; Morales-Elías, Norma Cecilia; Tiessen, Axel (2019). "Exploring regulatory networks in plants: Transcription factors of starch metabolism". PeerJ. 7: e6841. doi: 10.7717/peerj.6841 . PMC   6625501 . PMID   31328026.
  37. ↑ Finney, John (2015-08-27), "1. Water, water everywhere …", Water: A Very Short Introduction, Oxford University Press, pp. 1–13, doi:10.1093/actrade/9780198708728.003.0001, ISBN   978-0-19-870872-8 , retrieved 2023-09-27
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