A method of evaluating pigment complex wood plants as an indicator of adaptation to dry conditions
DOI:
https://doi.org/10.25726/NM.2018.1.1.006Keywords:
pigment complex, stress factors, adaptation, trees, shrubs, biodiversity, dendroflora enrichment, selection criteria, protective forest plantations.Abstract
The relevance of the research topic is related to the selection of adapted gene pool of trees and shrubs for the enrichment of forest reclamation complexes of degraded landscapes under the influence of stress factors. The experience of introduction in the arid zone of Russia showed that of several thousand taxa of tested trees and shrubs can successfully grow a little more than three hundred. To solve the problem of scientifically based selection of the range for the enrichment of dendroflora, taking into account the limiting stress factors of plant growth and development in various environmental conditions, it is necessary to conduct special experiments with a deep generalization and analysis of the results. The results of the experiment directly depend on the efficiency of the methods used.
The aim of the research is to compare and establish differences in the state of the pigment complex under the influence of stress factors using modern portable flavonide and CHLOROPHYLL dualex SCIENTIFIC+.
The article considers the possibility of determining the resistance of plant organisms to stress factors on the pigment complex. On the basis of comparative evaluation of quantitative measurements of chlorophyll a and b, carotenoids, leaf anthocyanins in the field using modern portable flavonide and chlorophyll meter DUALEX SCIENTIFIC+ the regularities of changes in the content of the pigment complex, reflecting the adaptive capacity of plants.
Objects of research were representatives of the species, molded and varietal diversity of trees and shrubs collection Fund FNTS Agroecology Russian Academy of Sciences, a Cluster growing in the arboretum Park VNIALMI(34:34:060061:10; Federal state unitary enterprise "Volgograd", 34:34:000000:122).
The paper presents an analysis of the field method of evaluation of pigment complex (chlorophyll a and b, carotenoids, anthocyanins) on the basis of optical wavelength spectra in healthy plants acceptable for quantitative data in spatial and temporal scales. The obtained materials are consistent with foreign studies and note the variation in the content of the pigment complex under the influence of environmental factors during the growing season. The range of chlorophyll a+b content in tree species was established from 11.50 to 46.95 mg/cm2. Differences in the effect of stress factors (air temperature-34,42-35,48 ° C, air humidity-15,5 – 16,0 %) in the content of flavonoids (in trees from 0,41 to 2,19 mg/cm2, shrubs-from 0.82 to 2.08 mg/cm2and anthocyanins (from 0.08 to 0.29 mg/cm2). The analysis of the pigment complex dynamics made it possible to identify promising groups of plants (species, forms, varieties) according to their adaptability to various adverse environmental effects.
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