Oyama magnolia

Names and Synonyms

Common Names

• Oyama magnolia

Scientific Names

Accepted name

Synonyms

• Oyama sieboldii

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and the phylum Streptophyta, falling under the class Equisetopsida and subclass Magnoliidae. It is classified within the order Magnoliales and the family Magnoliaceae. Finally, it is categorized under the genus Magnolia.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a widespread presence across several key regions of East Asia. In China, its distribution spans from the South-Central areas to the North-Central provinces. It can also be found growing within the Manchuria region of the country. Furthermore, the species is located throughout China Southeast. Beyond mainland China, this medicinal plant is also native to Japan.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Life history

The life history of Magnolia sieboldii is characterized by its perennial growth habit and structural classification as a phanerophyte, as its regenerative buds are borne on elevated woody branches above the soil surface. This woody perennial establishes itself through a long-term developmental cycle that begins with the germination of seeds, typically following a period of dormancy. As it matures, it develops a robust woody architecture capable of supporting significant height, distinguishing it from lower-growing life forms such as chamaephytes or hemicryptophytes. Throughout its life cycle, the plant undergoes seasonal transitions, transitioning from a period of vegetative growth to a flowering stage where large, fragrant blossoms emerge before the full development of foliage. The energy reserves stored within its woody tissues allow it to endure seasonal environmental fluctuations, ensuring its persistence as a long-lived woody species within its natural habitat.

Life form :

nanophanerophyte

Life form :

phanerophyte

Morphology

The morphology of Magnolia sieboldii is characterized by its stature as a woody, self-supporting plant that exhibits a growth form ranging from a shrub to a tree. It is a terrestrial species that functions as an independent organism, lacking any parasitic tendencies. In terms of physical dimensions, the plant typically reaches a height of at least 5 meters, with a maximum potential height of up to 10 meters.

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

tree

Growth form :

shrub

Parasite :

independent

Plant height max:

10 m

Plant height min:

5 m

Woodiness :

woody

Physiology

The physiology of Magnolia sieboldii is characterized by a metabolic framework governed by the C3 photosynthetic pathway, a trait typical of most woody angiosperms inhabiting temperate forest environments. Within this pathway, the initial fixation of atmospheric carbon dioxide occurs via the enzyme Ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO), which reacts $\text{CO}_2$ with ribulose-1,5-bisphosphate to produce two molecules of 3-phosphoglycerate. This process occurs within the mesophyll cells, where the absence of specialized $\text{CO}_2$-concentrating mechanisms, such as those found in C4 or CAM plants, makes the plant's efficiency sensitive to photorespiration under high temperature or low $\text{CO}_2$ conditions. To support its structural development and seasonal growth cycles, the plant utilizes this carbon fixation to drive the synthesis of complex carbohydrates, which are subsequently translocated through the phloem to facilitate secondary growth and the production of specialized secondary metabolites.

Photosynthetic pathway :

C3

Reproduction

The reproduction of Magnolia sieboldii is characterized by the production of specialized seeds that exhibit a highly consistent physical profile. The developmental process culminates in seeds that maintain a uniform weight, with a recorded seed mass mean, maximum, and minimum all measured at 0.17 g. This lack of variance in seed mass suggests a highly stabilized reproductive strategy, ensuring that each individual seed carries a standardized amount of nutrient reserves to support early germination. This precise mass of 0.17 g plays a critical role in the plant's ability to establish itself within its ecological niche, providing a reliable energetic baseline for the developing embryo.

Seed mass mean:

0.17 g

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Magnolia sieboldii has 1 reported plant parts identified across 2 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include stem.

Stem

1. Planta medica
2. Journal of natural products

Chemicals

Magnolia sieboldii has 4 reported phytochemicals identified across 2 scientific publications and several other databases. The most consistently reported chemicals include Costunolide, ABA, auxin, syringin 4-O-beta-glucoside.

Costunolide

1. Planta medica
2. Journal of natural products

ABA

1. Bioengineered

auxin

1. Frontiers in plant science

syringin 4-O-beta-glucoside

1. Journal of natural products

Activities

Magnolia sieboldii has 1 reported activities identified across 2 scientific publications and several other databases. The most consistently reported activities include Nitric-Oxide-Synthase-Inhibitor.

Nitric-Oxide-Synthase-Inhibitor

1. Journal of natural products

Conditions

Magnolia sieboldii has 3 reported investigations on conditions identified across 2 scientific publications and several other databases. The most consistently reported conditions include colon, melanoma, ovary.

Colon

1. Planta medica

Melanoma

1. Planta medica

Ovary

1. Planta medica

Preparations

Magnolia sieboldii has 1 reported preparations identified across 2 scientific publications and several other databases. The most consistently reported preparations include stem bark.

Stem bark

1. Journal of natural products