Actinidia polygama

Names and Synonyms

Scientific Names

Accepted name

Distribution

This plant exhibits a broad geographical distribution spanning across several distinct regions of East Asia. In the Russian Far East, its range extends to the Kuril Islands and the Primorye region. Within China, it can be found throughout the South-Central territories. The species also inhabits the northern stretches of China, specifically within Inner Mongolia. Additionally, its presence is noted throughout the Manchuria region.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Actinidia polygama is characterized by its adaptability to diverse terrain and specific altitudinal gradients. This species typically thrives within habitats consisting of forests, cut-over forests, and stony places, suggesting a preference for environments that may offer varying degrees of light penetration and rocky substrates. Its distribution spans a significant vertical range, beginning at low elevations of approximately 100 m AMSL and extending up to a maximum of 1900 m AMSL. On average, the plant is found at a mean elevation of 1200 m AMSL, indicating that it occupies a broad ecological niche across different montane and sub-montane zones.

Elevational range max:

1900 m AMSL

Elevational range mean:

1200 m AMSL

Elevational range min:

100 m AMSL

Habitat :

cut-over forest, forest, stony places

Life history

The life history of Actinidia polygama is characterized by its status as a perennial species, allowing it to persist and thrive through multiple growing seasons. As a deciduous plant, it undergoes a seasonal cycle where it sheds its foliage annually, typically in response to decreasing temperatures or changes in photoperiod, entering a period of dormancy before emerging again in the spring. This rhythmic pattern of growth and senescence is central to its survival strategy within its natural habitat.

Deciduousness :

deciduous

Lifecycle :

perennial

Morphology

The morphology of Actinidia polygama is characterized by its growth as a woody, climbing vine, functioning as an obligatory climber. This liana-like plant is terrestrial in its ecological habit and remains an independent organism rather than a parasite or epiphyte. It exhibits a shrub-like growth form in terms of its structural complexity, reaching a substantial plant height that typically ranges from a minimum of 4 meters to a maximum of 6 meters.

Aquatic :

terrestrial

Climber :

vine

Climber :

obligatory

Epiphyte :

terrestrial

Growth form :

shrub

Parasite :

independent

Plant height max:

6 m

Plant height min:

4 m

Woodiness :

woody

Physiology

The physiology of Actinidia polygama is fundamentally characterized by its reliance on the C3 photosynthetic pathway, a mechanism common to most woody climbing vines that involves the direct fixation of atmospheric carbon dioxide via the enzyme RuBisCO within the mesophyll cells. This metabolic process dictates the plant's resource requirements, as it necessitates consistent access to moisture and moderate temperatures to minimize photorespiration, which occurs when oxygen competes with carbon dioxide at the enzyme's active site. Consequently, the physiological efficiency of its carbon assimilation is highly dependent on environmental humidity and light interception through its expansive foliage. Beyond carbon fixation, its physiological processes include complex vascular transport systems designed to move water and nutrients upward through its climbing stems to support rapid vegetative growth, alongside specialized cellular respiration to maintain metabolic homeostasis throughout its seasonal life cycle.

Photosynthetic pathway :

C3

Reproduction

The reproduction of Actinidia polygama is characterized by a specific seasonal flowering period and the development of specialized fruit and seeds. The flowering process typically commences in June and concludes in July. Following pollination, the plant produces fleshy fruits that serve as the primary vessel for seed dispersal. These fruits exhibit a size range with a minimum length of 2.5 cm, a mean length of 2.75 cm, and a maximum length reaching up to 3 cm. Contained within these fleshy fruits are seeds that vary in volume; individual seed volumes range from a minimum of 0.9 mm³ to a maximum of 2.2 mm³, with an average seed volume of approximately 1.575 mm³.

Flowering time :

Jun

Flowering time :

Jul

Fruit dryness :

fleshy

Fruit length max:

3 cm

Fruit length mean:

2.75 cm

Fruit length min:

2.5 cm

Seed volume max:

2.2 mm³

Seed volume mean:

1.575 mm³

Seed volume min:

0.9 mm³

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Actinidia polygama has 12 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include (+)-Neomatatabiol, Actinidine, Actinidiolide, Actinidol, DIHYDROACTINIDIOLIDE.

(+)-Neomatatabiol

1. Dr. Duke

Actinidine

1. Dr. Duke

Actinidiolide

1. Dr. Duke

Actinidol

1. Dr. Duke

DIHYDROACTINIDIOLIDE

1. Dr. Duke

Dihydronepetalactone

1. Dr. Duke

Iridomyrmecin

1. Dr. Duke

Isodihydronepetalactone

1. Dr. Duke

Isoiridomyrmecin

1. Dr. Duke

Matatabiether

1. Dr. Duke

Activities

Actinidia polygama has 9 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Anticholinesterase, Antiseptic, CNS-Paralytic, Feline-attractant, Fungicide.

Anticholinesterase

1. Dr. Duke

Antiseptic

1. Dr. Duke

CNS-Paralytic

1. Dr. Duke

Feline-attractant

1. Dr. Duke

Fungicide

1. Dr. Duke

Insecticide

1. Dr. Duke

Insectiphile

1. Dr. Duke

Pesticide

1. Dr. Duke

Proteolytic

1. Dr. Duke