Female Reproductive Structure of Scots Pine Under the Influence of Degradation Forest Pathology Factors in the Plantations of the Bryansk Region

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UDС

UDC 630*174.754:630*416:630*443.3

DOI:

10.17238/issn0536-1036.2016.4.89

Abstract

The modern scientific literature gives little attention to the assessment of the female repro-ductive structure of Scots pine under the influence of degradation forest pathology factors. Morphological parameters, a fertile tier and a safety of Scots pine maсro strobili ovules at the program stage of reproduction under the action of the combination of forest pathology factors by the example of 7 sample plots with the average categories of sanitary state equal to 1.7…2.7 in the pine plantations of the Bryansk region are investigated. The most im-portant reason of degradation of pine forests is root fungus. Since 2011 the fox-coloured sawfly centers have been extended on the territory of the Bryansk region. The intensity of tree crown browsing on the sample plots in spring of 2012 was 25…100 % excepting of control. By the example of trees of the second and third categories of sanitary state the low-ered rates of female reproduction in the degraded plantations of Scots pine being in the state of uncritical degradation are stated. The volume of a maсro strobili fertile tier in the sample plots varied in the range from 29.9…45.3 pcs, and the total safety of ovules – from 36.8…61.3 %. A positive correlation of the safety of ovules in the first and second growing seasons was observed. The lowest reproduction parameters were marked in the current root fungus center combined with partial (up to 50 %) defoliation of tree crowns. Damage of the growing maсro strobili by the fox-coloured sawfly was on the insignificant level (1…2 %). The indicator of plantation sanitary state was used to assess the quality of female reproduc-tion of Scots pine as the processes of maсro strobili and ovules formation weaken in case of strong defoliation of model trees crowns, allocated by the features of weakening. Only the weak tendencies of feedback between the categories of sanitary state and reproduction of model trees in the sample plots were stated. Despite the decline in the safety of ovules, for-est pathology factors in the studied variants of combination and intensity have not affected appreciably on the processes occurring in the female reproductive structure of Scots pine. The necessary prerequisites for the further development of the reproductive process are re-tained in the weakened plantations of Scots pine.

Authors

G.A. Kisternyy, Сandidate of Agricultural Sciences, Associate Professor

Affiliation

Bryansk State Engineering Technological Academy, Stanke Dimitrov ave., 3, Bryansk, 241037, Russian Federation; е-mail: kisterniy@mail.ru

Keywords

Scots Pine, plantation, forest pathology factor, female reproduction, fertility tier, safety of ovules, variability.

References

1. Bazhina E.V., Amiev P.I. Morfologiya pobegov i osobennosti semennoy produk-tivnosti makrostrobilov derev'ev sosny obyknovennoy (Pinus sylvestris L.), porazhennykh biatorellovym rakom [The Morphology of Shoots and Peculiarities of Seed Productivity of Scots Pine (Pinus sylvestris L.) Trees Maсro Strobili, Affected by Biatorella Cancer]. Khvoynye boreal'noy zony [Conifers of the Boreal Area], 2006, no. 2, pp. 196–202.
2. Kisternyy G.A., Panicheva D.M. O chastichnoy zhenskoy steril'nosti sosny obyknovennoy v rayone rasprostraneniya ftoristykh promyshlennykh vybrosov [On the Partial Female Sterility of Scots Pine in the Area of Fluoride Industrial Emissions]. Lesa Evrazii – Severnyy Kavkaz: materialy VIII Mezhdunar. konf. molodykh uchenykh [Forests of Eurasia – North Caucasus: Proc. VIII Int. Conf. Young Scientists]. Moscow, 2008, pp. 150–151.
3. Mamaev S.A. O zakonomernostyakh vnutrividovoy izmenchivosti drevesnykh ras-teniy [On the Patterns of the Intraspecific Variability of Woody Plants]. Teoreticheskie os-novy vnutrividovoy izmenchivosti i struktury populyatsiy khvoynykh porod [Theoretical Ba-ses of Intraspecific Variability and the Structure of Softwood Populations]. Sverdlovsk, 1974, pp. 3–12. 4. Mozolevskaya E.G., Kataev O.A., Sokolova E.S. Metody lesopatologicheskogo obsledovaniya ochagov stvolovykh vrediteley i bolezney lesa [Methods of Forest Pathology Examinations of the Secondary Insects Centers and Forest Diseases]. Moscow, 1984. 152 p.
5. Obzor sanitarnogo i lesopatologicheskogo sostoyaniya lesov za 2012 g. i prognoz lesopatologicheskoy situatsii na 2013 g. [Review of the Sanitary and Forests Pathology Condi-tion in 2012 and the Forecast of the Forest Pathology Situation for 2013]. Ed. by the Depart-ment of Forest Protection and Forest Pathology Monitoring of the Branch of “Russian Forest Protection Center”, “Forest Protection Center of Kaluga Region”. Bryansk, 2012. 165 p.
6. Romanovskiy M.G. Gametofitnaya smertnost' semyapochek sosny obyknovennoy [Gametophyte Mortality of Scots Pine Ovules]. Genetika [Russian Journal of Genetics], 1989, vol. 25, no. 1, pp. 99–107.
7. Trenin V.I. Osobennosti reproduktsii vidov semeystva Pinaceae v usloviyakh severo-zapada taezhnoy zony Rossii (na primere Karelii): avtoref. dis. … d-ra biol. nauk [Peculiarities of Reproduction of Pinaceae Family Species in the Conditions of the North-West Taiga Zone of Russia (the Case of Karelia): Dr. Biol. Sci. Diss. Abs.]. Petrozavodsk, 2010. 31 p.
8. Fedorkov A.L. Izmenchivost' adaptivnykh priznakov khvoynykh v usloviyakh stressa na severe Evropy: avtoref. dis. … d-ra biol. nauk [Variability of the Adaptive Traits of Conifers Under Stress Conditions in the North of Europe: Dr. Biol. Sci. Diss. Abs.]. Moscow, 2011. 32 p.
9. Chung M.S. Flowering Characteristics of Pinus Sylvestris L. with Special Empha-sis on the Reproductive Adaptation to Local Temperature Factor. Acta Forestalia Fennica, 1981, no. 169. 69 p.
10. Fedorkov A. Climatic Adaptation of Seed Maturity in Scots Pine and Norway Spruce Populations. Silva Fennica, 2001, vol. 35, no 1, pp. 119–123.
11. Harju A.M., Karkkainen K., Routsalainen S. Phenotypic and Genetic Variation in the Seed Maturity of Scots Pine. Silvae Genet., 1996, vol. 45, pp. 205–211.
12. Sahlen K. Effects of Artificial Conditions on Anatomical and Physiological Ripening of Pinus sylvestris L. Seeds. New Forests, 1995, no. 9 pp. 205–224.
13. Sarvas R. Investigations on the Flowering and Seed Crop of Pinus sylvestris. Common. Inst. For. Fenn., 1962, vol. 53, no. 4. pp. 1–198.
14. Sarvas R. The Annual Period of Development of Forest Trees. Proc. Finn. Acad. of Sci. and Letters., 1967, pp. 211–231.
15. Smith D.L., Krikorian A.D. Low External pH Replaces 2,4-D in Maintaining and Multiplying 2,4-D-Initiated Embryogenic Cells of Carrot. Physiol. Plant., 1990, no. 80, pp. 329–336.
Received on June 16, 2015