Recommended
More Related Content
What's hot
What's hot (20)
Similar to Ginkgo biloba
Similar to Ginkgo biloba (20)
Recently uploaded
Recently uploaded (20)
Ginkgo biloba
- 1. Ginkgo biloba "The living fossil" SATHISHA . R 1ST M.Sc (BOTANY) GOVERNMENT SCIENCE COLLEGE
- 2. CLASSIFICATION • Class – Ginkgopsida • Order – Ginkgoales • Family – Ginkgoaceae • Genus – Ginkgo • Species – biloba
- 3. INTRODUCTION OF Ginkgo biloba • The class Ginkgopsida includes a single order Ginkgoales. • It is now represented by a single monotypic extant plant ,Ginkgo biloba. • The members of this group first appeared in the Permian period. • They were well-represented all over the world during the Jurassic period and gradually started declining from Cretaceous onwards.
- 4. INTRODUCTION OF Ginkgo biloba • The extant plant, Ginkgo biloba, has its fossil record as far back as Triassic. • The leaf impressions of Ginkgo biloba has been identified from the carboniferous rocks. • Ginkgo biloba has escaped extinction and still exists today being the oldest living seed plant. • Ginkgo biloba has existed for about 150 million years and has been rightly called the “living fossil”.
- 5. SAILIENT FEATURES OF Ginkgo biloba • Ginkgo biloba is a only living plant of the class Ginkgopsida. • It has retained certain primitive characters of its ancestors such as Dichotomous venation, the ovule with 3-layered integument, pollen chamber etc. • Its advanced features are an Ectophloic siphonostele, a small pith, a thick vascular cylinder, a thin cortex & absence of mesarch xylem as in Coniferales.
- 6. SAILIENT FEATURES OF Ginkgo biloba • It shows certain characters in common with Cordaitales such as the branching habit, thick vascular cylinder, venation of the leaves, structure of the stamens etc. • Its distinctive features, however, are the form of the leaves and the structures of the male & female strobili.
- 7. DISTRIBUTION 1. Geological distribution:- Triassic to present day. 2. Geographical distribution:- • Ginkgo biloba is commonly called Maiden hair tree. • Ginkgo biloba is successfully cultivated as an ornamental plant in gardens of North America and Europe. • This plants are found growing near the Buddhist temples in China, japan, thailand, etc.
- 8. • It has been reported that G.biloba still exists today in south-eastern china in the wild state. • In India, very few Ginkgo biloba trees are found in the botanic gardens of Darjeeling, Dehradoon, Musoorie, Shibpur, etc.
- 9. CHARACTERISTICS OF Ginkgo biloba • The Ginkgo biloba is a tall deciduous tree(up to 30m height) giving rise to a very irregular pattern of branching. • The branches are dimorphic, bearing two types of shoot : long shoots and dwarf shoots. • The leaves also shows dimorphism, those present on the long shoot are deeply lobed, while those on the dwarf shoots are either not so deeply lobed or may be entire. • It has a tap root system which posseses strong lateral roots that penetrate deep into the soil.
- 10. REPRODUCTION • Ginkgo biloba reproduces sexually. • It is dioecious. • Morphologically , the male and female plants are indistinguishable before the formation of reproductive organs. • However, the male and female trees can be distinguished cytologically at an early stage.
- 11. LIFE CYCLE
- 12. PHOTO GALLERY • Ginkgo biloba
- 13. REFERENCES [1] Bhattacharya, Hait, Ghosh, “The text book of BOTANY”, vol 2, New central book agency Pvt Ltd,2015. pp 47-57. [2] S.N.Pandey, S.P Misra, P.S Tried, “A text book of Botany”, Volume 2, 13th ed. Vikas publishing house PVT LTD, 2016. Pp 133 [3] www.googlephotos.com
- 15. THANKYOU