Peculiarities of biochemical and morphological adaptation of siberian crabapple (Malus baccata L. Borkh) to the conditions of insufficient humidity on the boundary between forest zone and dry steppe
- 35 Downloads
The peculiarities of adaptation of Siberian crabapple to moisture shortage on the boundary between forests and the dry steppe are studied. A significant decrease in the growth rate that eventually leads to dwarfing is discovered. In the course of such adaptation, there is a reduction in the photosynthetic surface of leaves and increase in the stomatal density on the remaining leaves. Meanwhile, the size of stomata decreases, which helps optimize the loss of water during transpiration. The decrease in the growth rate of Siberian crabapple shoots is revealed to be accompanied by a threefold decrease in the content of endogenous indoleacetic acid (IAA) in tips of dwarf Siberian crabapple (116 ± 13 ng/g of dry weight for the dwarf forms vs. 350 ± 39 ng/g of dry weight for the tall-growing forms). There is no significant difference in the content of ABA in tips of both forms studied (210 ± 18 and 213 ± 21 ng/g of dry weight for tall-growing and dwarf plants, respectively).
KeywordsMalus baccata L. Borkh Siberian crabapple water availability adaptation dwarfing stomata IAA ABA
Unable to display preview. Download preview PDF.
- Arve, L.E., Torre, S., Olsen, J.E., and Tanino, K.K., Stomatal responses to drought stress and air humidity, in Abiotic Stress in Plants — Mechanisms and Adaptations, Shanker, A. and Venkateswarlu, B., Eds., In Tech Open, 2011.Google Scholar
- Atlas Zabaikal’ya (Atlas of Transbaikalia), Irkutsk: Akad. Nauk SSSR, 1967.Google Scholar
- Crawford, P.J. and Barrett, T.P., The reference librarian and the business professor: a strategic alliance that works, Ref. Libr., 1997, vol. 3, no. 58, pp. 75–85.Google Scholar
- Davydov, V.A., Simple method for receiving of epidermal imprints using organic glass and adhesive band, Fiz. Rast., 1991, vol. 38, no. 3, pp. 605–609.Google Scholar
- Ivanov, V.B., Plotnikova, I.V., Zhivukhina, E.A., et al., Praktikum po fiziologii rastenii (Practical Manual on Plant Physiology), Moscow: Akademiya, 2004.Google Scholar
- Lockard, R.G. and Schneider, G.W., Stock and scion relationships and the dwarfing mechanism in apple, Hortic. Rev., 1981, vol. 3, pp. 315–375.Google Scholar
- Permyakov, A.N., AreaS v. 2.1. http://www.ssaa.ru
- Rudikovskiy, A.V., Rudikovskaya, E.G., Dudareva, L.V., and Kuznetsova, E.V., Unique and rare forms of Siberian apple tree in Selenga district of Buryatia, Sib. Ekol. Zh., 2008, no. 2, pp. 327–333.Google Scholar
- Tworkoski, T. and Miller, S., Endogenous hormone concentrations and bud-break response to exogenous benzyl adenine in shoots of apple trees with two growth habits grown on three rootstocks, J. Hortic. Sci. Biotech., 2007, vol. 82, pp. 960–966.Google Scholar
- Vadyunina, A.F. and Korchagina, Z.A., Metody issledovaniya fizicheskikh svoistv pochv (Analysis Methods of Physical Properties of Soils), Moscow: Agropromizdat, 1986.Google Scholar