Introduction Of Pittosporum Banks Ex S
Abstract
INTRODUCTION OF PITTOSPORUM BANKS EX SOL. SPECIES IN A FRAME AREA: HISTORY AND PROSPECTS
In article are provided the data on history of opening of Pittosporum species. The results of introduction and relevant research of this genus in frame area are presented. Some 9 introduced taxa are considered: Pittosporum heterophyllum Franch, P. tobira Ait., P. tobira var. variegatum Hort., P. undulatum Vent., Ð . tenuifolium Gaertn, P. crassifolium Soland. ex Putterl., P. eugenioides A. Cunn, P. viridiflorum Sims, P. sahnianum Gowda. We analyzed the botanical-geographical origin and ecological-morphological features of plants. The results are presented of introduction success that testified a high rate of success of introduction for all the studied species. Researches were conducted by standard methods of plant introduction. By results of phenological supervision it was proved that considered species are the ecological cosmopolitans. Despite sharply changed intensity of ecological parameters of the maintenance (in greenhouse and interiors) the plants are capable to pass cyclically all phenological phases, changing the terms and duration of main phenological phases. These changes are especially typical for duration of dormant period. The period of active growth of sprouts was registered for I-III and VI-VIII months. The terms of this period were changed annually from 78 to 106 days. Considerably longer period of sprouts growth was characteristic for species: P. crassifolium, P. tenuifolium, and P. heterophyllum. The results of experimental studies allows to separate some species within the genus that are more dependent upon the level of illumination – P eugenioides, P. tenuifolium, P. crassifolium, P. undulatum.
<