Morus rubra

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Morus rubra
MorusRubra9.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Moraceae
Genus: Morus
Species:
M. rubra
Binomial name
Morus rubra
L. 1753
Morus rubra range.png
Native range

Morus rubra, commonly known as the red mulberry, is a species of mulberry native to eastern and central North America. It is found from Ontario, Minnesota, and Vermont south to southern Florida, and west as far as southeastern South Dakota, Nebraska, Kansas, and central Texas. There have been reports of isolated populations (very likely naturalized) in New Mexico, Idaho, and British Columbia. [2]

Contents

Common in the United States, it is listed as an endangered species in Canada, [3] [4] and is susceptible to hybridization with the invasive white mulberry (M. alba), introduced from Asia. [5]

Description

1809 illustration Morus rubra 250389.png
1809 illustration

Red mulberry is a small to medium-sized deciduous tree, growing to 10–15 metres (35–50 feet) tall, rarely 21 m (70 ft), with a trunk up to 50 centimetres (20 inches) in diameter. It can live for up to 125 years. [7]

The leaves are alternate, 7–18 cm (2+3⁄4–7 in) long (rarely to 36 cm or 14+1⁄4 in) and 8–12 cm (3+1⁄4–4+3⁄4 in) broad (about twice as big as the white mulberry's leaves), [3] simple, broadly cordate, with a shallow notch at the base, typically unlobed on mature trees although often with 2–3 lobes, particularly on young trees, and with a finely serrated margin. [3] Unlike the leaves of white mulberry ( M. alba ) which have a lustrous upper surface, the red mulberry leaf upper surface is noticeably rough, similar in texture to fine sandpaper, and the underside is densely covered with soft hairs. [8] [9] The leaf petiole exudes milky sap when severed. [10] The leaves turn yellow in autumn.

The flowers are relatively inconspicuous: small, yellowish green or reddish green and opening as leaves emerge. Male and female flowers are usually on separate trees although they may occur on the same tree.[ citation needed ]

The fruit is a compound cluster of several small achenes surrounded by a fleshy calyx, similar in appearance to a blackberry, 2–3 cm (3⁄4–1+1⁄4 in) long. It is initially pale green, ripening to red or dark purple. [3]

The red mulberry develops an extensive root system, containing lateral, horizontal roots that remain within the upper 24 inches of the soil and smaller, vertical roots that go off the lateral roots. This combination gives stability and allows the tree to uptake the nutrients from the soil surface where nutrients are most abundant. [11]

Red mulberry is hardy to subzero temperatures, relatively hardy to drought, pollution, and poor soil, though the white mulberry is hardier. [12]

The berries are widely sought after by birds in spring and early summer in North America; as many as 31 species of birds have been recorded visiting a fruiting tree in Arkansas. [13] The red mulberry is pollinated by the wind. [14]

Distribution

The red mulberry plant is native to the United States. M. rubra occurs from the Atlantic coast to the eastern edge of the Great Plains, south to southern Florida and north to southwestern Ontario in Canada. The native red mulberry can be mostly found in riparian areas, and is considered rare and threatened in many areas including northeastern United States and southeastern Canada.[ citation needed ]

The morphologically similar M. alba is potentially posing a threat to the existence of M. rubra because of the rapid range expansion, aggressive growth patterns, and reproductive advantages over M. rubra. The red mulberry is currently considered endangered in Canada, and in the USA, the states of Connecticut and Massachusetts as well as threatened in Michigan and Vermont. [8]

Uses

Young tree Morus rubra Nana kz1.jpg
Young tree

The berries are edible and sweet. [15] The first English colonists to explore eastern Virginia in 1607 mentioned the abundance of both mulberry trees and their fruit, which was eaten (sometimes boiled) by the native Powhatan tribes. Today, mulberries are eaten raw, used in the fillings of pastries, and fermented into wine. They are also used for marmalades, liquors, natural dyes, and cosmetics. [16] The berries are not commercially sold because they have very short "shelf lives" and pack/ship very poorly. [17]

The wood may be dried and used for smoking meats with a flavour that is mild and sweet. It is also used for fenceposts because the heartwood is relatively durable. Other uses of the wood include farm implements, cooperage, furniture, interior finish, and caskets. [18]

History

Some Native American tribes used an infusion of the bark as a laxative or purgative. Infusions of the root were used to treat weakness and urinary ailments. The sap was applied to the skin to treat ringworm. [3] Choctaw people wove clothing from the inner bark of young M. rubra and similar shoots. [19]

Documentations of the use of red mulberry go back to 1500 by the De Soto expedition, which recorded the consumption of dried fruits by the indigenous Muskogee peoples. There were diverse uses of mulberry in different indigenous cultures. Among them, the Cherokee mixed cornmeal and sugar to the berries, to make sweet dumplings. Later on, European settlers also used the mulberry fruits to make pies or preserves. The trees were also important as a source of livestock feed and wood for furniture or boats. [20]

The Choctaw Indians used to prepare a kind of cloth out of the bark of Morus and would produce a yellow dye from the root of the same plant. [21]

Cultivation

Fruit MorusRubra2.jpg
Fruit

In an early stage, pruning is necessary to make the red mulberry tree develop a sturdy framework. Afterwards, the pruning requirements of the red mulberry involve mainly removing dead or overcrowded wood. To keep the tree in a tidy form, it is suggested to choose a few main branches and cut the laterals to six leaves in July. This allows the spurs to develop near the main branches. However, the red mulberry tree tends to bleed after pruning, so pruning should be reduced to a minimum and should be conducted when the tree is dormant, as the bleeding is less severe then. Removing branches of more than 2 diameters should be absolutely avoided. [14] When tilling the soil, it must be paid attention not to damage the horizontal roots. Cutting them would impair nutrient uptake. [22]

In the first year of a red mulberry's lifetime, a sufficient water supply is critical for the development of the root system. Young mulberry trees should be watered thoroughly twice a week if growing on light soils and once a week if growing on clay soils. Later, the red mulberry is drought tolerant, although under water scarcity it may drop its fruits too early which results in berry yield losses. Thus, for berry production, irrigation is recommended under dry conditions. [14]

Mulching helps to retain moisture in the soil and to reduce the competition with grass and weeds. Thus, it is recommended to apply mulch under mulberry trees. The mulch should not touch the stem as this may lead to rotting. [23] Mulberry trees thrive with little to no fertilizer. Fertilizing more than twice a year should be avoided and fertilizing later than July may lead to freeze damage. [ citation needed ] An NPK value of 10-10-10 is targeted and depending on the available nutrients in the soil, other nutrients like iron should be added. [24]

Usually, the red mulberry is free from pests and diseases but in some areas the "popcorn disease" may occur. In that case, infected fruits should be collected and burned, to prevent the pathogens population to reproduce and survive for the next season. [14] If cultivated for fruits, male and female plants must be grown, if a monoecious variety is chosen. However, there are also dioecious varieties. To harvest the fruit, branches are usually shaken and the fruit collected manually. [25]

Climatic and soil requirements

Mulberry grows in various climatic conditions and can be found in climates between temperate and tropical. [26] Red mulberry plants require a total annual rainfall of 1,000–2,000 mm (39–79 in) [27] and are adapted to altitudes of up to 800 msl. The native environment of red mulberry most often consists of moist forests, thickets on the floodplains, moist hillsides and river valleys.[ citation needed ]

It can tolerate short periods of flooding and can tolerate temperatures as low as −36 °C (−33 °F). Optimal growing temperatures are between 24 and 28 °C (75 and 82 °F). At least 140 frost free days a year are required. [28] Normally, the tree grows in full sun, but growth is also possible in partial shading. Red mulberry is also drought tolerant. [27]

In its native habitat red mulberry grows in mesic hardwood forests in moist soils, [20] although they can be found in many different moist soils. Such soils include inceptisols, alfisols, spodosols and ultisols. [29] The plants prefer deep, well drained soils that range from loamy to clayey and have a high moisture-holding capacity. [26] A soil pH of 5-7 is optimal. [27]

Yield

Mulberries yield wood for timber, with an average 10–15 m height and diameter of 50 cm. The timber volume is 0.962 m³ to 1.435 m³. [30] Mulberry wood has the same quality as oak, which can be sold for 90-150 euro per m3. Nevertheless, to achieve a quantity of 1m3, we should have to take down the whole tree, which can be counterproductive in the case of fruit production. [31]

Nevertheless, the wood from the trimming can still be used as firewood and the biggest parts for furniture or turned objects. An additional yield of 8–12 tons/acre/year (20–30 tons/hectare/year) can be achieved with the littler parts and the leaves which serve as forage. Only 2 to 3 years after whip cultivar plantation, the tree should already start to fruit. The yields of fruits should reach 3 to 5 kg (per tree per year) on the first years until 300 kg for a mature tree. [32]

Economic aspects

In 2015, almost 3.4 million pounds of frozen mulberries were imported to the US – a market value of 2.6 million US-Dollars. The demand for the fruit is still rising and the prices are high. This constitutes a great opportunity for mulberry producers. [25] It takes ten years from the seedling stage, until a mulberry tree bears fruit. [25] Thus, for the decision of building up a mulberry orchard, one needs to estimate not the current demand but the market potential of ten years later. This involves more risk and long-term planning. However, there are grafted varieties that produce fruit earlier [25] and reduce this problem.

In future, the economic viability of mulberry production may increase even more as its drought resistance constitutes an opportunity for agriculture under climate change and as the fruit contains many micronutrients and vitamins, while people pay more and more attention to healthy nutrition.[ citation needed ]

As mulberry production is not yet mechanized well, a lot of labor is required, especially to harvest the fruit. However, there is potential for mechanizing the shaking of the branches, similar as in tart cherry harvesting. A difficulty in the commercial use of mulberries is the fragility of the berries which constitutes a challenge in storage and transport. [25] The leading producers of mulberry fruit are Turkey and Iran. They are the main mulberry suppliers to Europe. However, they mainly produce white and black mulberry - thus, the production of red mulberry is still less widespread.[ citation needed ]

Agroforestry constitutes an opportunity to further improve the viability of red mulberry cultivation. Short-duration legume crops as intercrops improves the soil, controls weeds, and creates additional revenue. [33]

Nutritional aspects

Fresh mulberries are mainly water. Per 100g, they provide 1.2g protein and 0.85g fat. [34] Dried mulberries, which is the most consumed form, contain 70g carbs, 14g fibers, 12g proteins and 3g fats per 100g.

Mulberries are rich in vitamin C, calcium, iron and potassium. [35]

Limitations and drawbacks

Despite all mentioned opportunities and benefits, there are a few drawbacks and limitations to the cultivation of the red mulberry:

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<span class="mw-page-title-main">Breadfruit</span> Edible fruit-bearing tree in the family Moraceae

Breadfruit is a species of flowering tree in the mulberry and jackfruit family (Moraceae) believed to be a domesticated descendant of Artocarpus camansi originating in New Guinea, the Maluku Islands, and the Philippines. It was initially spread to Oceania via the Austronesian expansion. It was further spread to other tropical regions of the world during the Colonial Era. British and French navigators introduced a few Polynesian seedless varieties to Caribbean islands during the late 18th century. Today it is grown in some 90 countries throughout South and Southeast Asia, the Pacific Ocean, the Caribbean, Central America and Africa. Its name is derived from the texture of the moderately ripe fruit when cooked, similar to freshly baked bread and having a potato-like flavor.

<span class="mw-page-title-main">Fruit tree</span> Tree which bears fruit

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<i>Morus</i> (plant) Genus of plants

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References

  1. ↑ Stritch, L. (2018). "Morus rubra". IUCN Red List of Threatened Species . 2018: e.T61890109A61890113. doi: 10.2305/IUCN.UK.2018-1.RLTS.T61890109A61890113.en . Retrieved 2 October 2022.
  2. ↑ "Morus rubra". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  3. 1 2 3 4 5 Wunderlin, Richard P. (1997). "Morus rubra". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 3. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  4. ↑ Ambrose, J. D., & Kirk, D. (2004). National Recovery Strategy for Red Mulberry (Morus rubra L.). Ontario Ministry of Natural Resources, Guelph, Ontario, Canada
  5. ↑ Burgess, K. S.; Morgan, M.; Deverno, L.; Husband, B. C. (2005). "Asymmetrical introgression between two Morus species (M. alba, M. rubra) that differ in abundance" (PDF). Molecular Ecology. 14 (17). University of Toronto, Barrett Lab: 3471–3483. Bibcode:2005MolEc..14.3471B. doi:10.1111/j.1365-294X.2005.02670.x. PMID   16156816. S2CID   31129733. Archived from the original (PDF) on 2008-02-21.
  6. ↑ Duhamel du Monceau, H.L., Traité des arbres et arbustes, Nouvelle édition [Nouveau Duhamel], vol. 4: t. 23 (1809) [P.J. Redouté] drawing: P.J. Redouté lithograph Tassaert family: Moraceae subfamily: Moroideae tribe: Moreae 202746 ruber, rubra, rubrum 202746 ruber, rubra, rubrum Illustration contributed by: Real Jardín Botánico, Madrid, Spain
  7. ↑ "Red Mulberry – Morus rubra L." (PDF). nrcs.usda.gov. Retrieved 2023-10-19.
  8. 1 2 M. P. Nepal; D. J. Wichern (2013). "Taxonomic Status Of Red Mulberry (Morus Rubra, Moraceae) At Its Northwestern Boundary" (PDF). Proceedings of the South Dakota Academy of Science. 92: 19. Retrieved 2019-07-01.
  9. ↑ Farrar, J.L. (1995). Trees in Canada. Fitzhenry and Whiteside/Canadian Forest Service, Markham, Ontario.
  10. ↑ "Red Mulberry". 6 July 2018. Archived from the original on 6 July 2018. Retrieved 12 March 2022.
  11. ↑ Rodriguez (11 January 2013). "Root structure of a mulberry tree". Homeguides. Retrieved 4 December 2022.
  12. ↑ "Mulberry Fruit Facts". 15 June 2006. Archived from the original on 15 June 2006. Retrieved 12 March 2022.
  13. ↑ Jackson, J. L.; Kannan, R. (2018). "Avian frugivory in a fruiting mulberry tree (Morus rubra) in Arkansas". Journal of the Arkansas Academy of Science. 72: 38–46. doi: 10.54119/jaas.2018.7219 . S2CID   143429173.
  14. 1 2 3 4 5 "Red Mulberry". Growables.
  15. ↑ "Morus rubra Red Mulberry, Common Mulberry, White Mulberry PFAF Plant Database". Plants for a Future . Retrieved 2022-05-15.
  16. ↑ Ercisli, S.; Orhan, E. (2007). "Chemical composition of white (Morus alba), red (Morus rubra) and black (Morus nigra) mulberry fruits". Food Chemistry. 103 (4): 1380–1384. doi:10.1016/J.FOODCHEM.2006.10.054 . Retrieved 2 December 2022.
  17. ↑ North Carolina Extension Gardener Plant Toolb ox. "Morus rubra (Common Mulberry, Mulberry, Red Mulberry)". North Carolina Extension Gardener Plant Toolbox. Retrieved 2 December 2022.
  18. ↑ Lamson, N. "Morus rubra L." USDA. Retrieved 2 December 2022.
  19. ↑ Little, Elbert L. (1994) [1980]. The Audubon Society Field Guide to North American Trees: Western Region (Chanticleer Press ed.). Knopf. p. 426. ISBN   0394507614.
  20. 1 2 Andreu, Michael G.; Friedman, Melissa H.; McKenzie, Mary; Quintana, Heather V. "Morus rubra, Red Mulberry". IFAS Extension. EDIS. Retrieved 13 November 2022.
  21. ↑ Romans, B. (1775). A Concise Natural History of East and West Florida. New York: Printed for the author. p.  85. OCLC   745317190.. Later, he wrote, "The Choctaws put its inner bark in hot water along with a quantity of ashes and obtain filaments, with which they weave a kind of cloth not unlike a coarse hempen cloth." (ibid., p. 142). Romans, not knowing the species in question, conjectured that it may have been Morus papyrifera, a plant now largely recognized as being native to Asia.
  22. ↑ Rodriguez (11 January 2013). "Root structure of a mulberry tree" . Retrieved 4 December 2022.
  23. ↑ "Managing your Mulberry". Moruslondinium. Retrieved 13 November 2022.
  24. ↑ "How to care for a Mulberry tree". wikiHow.
  25. 1 2 3 4 5 6 "Mulberries". AgMRC. Retrieved 13 November 2022.
  26. 1 2 Sharma, S.K.; Zote, K.K (2010). "Mulberry – A multi purpose tree species for varied climate". Range Management and Agroforestry. 31: 97–101.
  27. 1 2 3 Lim, Tong Kwee (2021). Edible Medicinal and Non Medicinal Plants: Volume 3, Fruits. Springer Netherlands. ISBN   978-94-007-2534-8.
  28. ↑ CPL, A. (2021). Nutrient-Rich Berries: Growing Practices and Food Uses. Agrihortico.
  29. ↑ United States Department of Agriculture (1990). Silvics of North America (Volume 654, nr.2 ed.). U.S. Government Printing Office.
  30. ↑ "Volume de l'arbre sur pied".
  31. ↑ "Les prix du chêne et du hêtre s'envolent, au grand dam des scieries wallonnes". rtbf.be.
  32. ↑ Alfrey, Paul (29 September 2021). "Mo' Mulberry — A guide to probably everything you need to know about growing Mulberry".
  33. ↑ "Mulberry Cultivation: Know the Soil Requirement, Varieties, Propagation and Harvesting". Agripedia. Retrieved 13 November 2022.
  34. ↑ "Mulberry as a Valuable Resource for Food and Pharmaceutical Industries: A Review". ResearchGate.
  35. ↑ "Health Benefits of Mulberries". WebMD. Retrieved 12 April 2024.
  36. ↑ "Manual of Instructions for Raising Mulberry Trees and Silk Worms". NZETC. Retrieved 13 November 2022.
  37. 1 2 "Morus Rubra". Practical Plants.
  38. ↑ "The advantages of the Red Mulberry Tree". Homeguides. 16 September 2012. Retrieved 13 November 2022.
  39. ↑ "Mulberry breeding, cultivation and utilization in Japan". FAO. Retrieved 13 November 2022.
  40. ↑ "Mulberry". Texas Plant Disease Handbook. Retrieved 13 November 2022.
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