Introduction and adaptive capacity of pittosporum tenuifolium gaertn. in conditions of protected soil

Authors

DOI:

https://doi.org/10.15587/2519-8025.2019.179207

Keywords:

Pittosporum tenuifolium, adaptation, leaf, sprout, rest, anatomical structure, pigments, stability

Abstract

The aim of the research – to study the complex of biological parameters and physiological specificity of plants of P. tenuifolium Gaertn variety as criteria of their adaptive possibilities under new conditions. Many researchers considered problems of adaptation under conditions of industrial interiors of separate varieties and groups of plants. Information, concerning the adaptive potential of varieties of Pittosporum genus is very limited. There are only brief reports about biological peculiarities of separate varieties of the genus under conditions of introduction (Tumak, Palamar 2007; Bojko, 2015, 2016, 2018; Larsen, 1979; Tranguillini, 1964).

As far as such studies for P. Tenuifolium variety are practically absent, problems of studying adaptive abilities of plants of this variety become especially urgent. In this connection plants of this variety were chosen as the object of the research. The phonological, comparative, morphological and anatomic research methods of were used in this work.

According to the results of phonological observations, plants of Pittosporum tenuifolium variety demonstrated adaptive changes, characterized by the period of forced rest and variation of terms and duration of this period, conditioned by keeping conditions.

The comparative analysis of morphometric parameters of a sprout and leaf of plants, growing in interiors with different microclimatic conditions, revealed morphological changes, manifested in rates of annual growth, number of young leaves and their sizes, internode length. The anatomic construction of a leaf demonstrated the thickness increase of the adaxial epidermis by 32,5 %; thickness decrease of a leaf by 8 %. There was established the unessential increase of palisade coefficient, accompanied by redistribution between spongy and columnar mesophyll to the latter side. Adaptation at the physiological-biochemical level was manifested by changes of the quantitative content of pigments and their ratios under conditions of industrial interior.

Conclusions. The assessment of ecological-biological, morphological-anatomical and physiological peculiarities of plants of Pittosporum tenuifolium variety revealed adaptive changes, characterized by forced rest, variation of occurrence terms and duration of this period; morphological-anatomical changes in the sprout and leaf construction; change of the quantitative content of pigments and their ratios. The established changes favored the resistance increase of Pittosporum tenuifolium plants under changed keeping conditions

Author Biography

Lyudmyla Boyko, Krivoy Rog Botanical Garden of NAS of Ukraine Marshaka str., 50, Krivoy Rog, Ukraine, 50089

PhD, Senior Researcher, Head of Department

Department of Introduction andAcclimatization of Plant

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Published

2019-10-11

How to Cite

Boyko, L. (2019). Introduction and adaptive capacity of pittosporum tenuifolium gaertn. in conditions of protected soil. ScienceRise: Biological Science, (3 (18), 20–25. https://doi.org/10.15587/2519-8025.2019.179207

Issue

No. 3 (18) (2019)

Section

Biological Sciences

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Copyright (c) 2019 Lyudmyla Boyko

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