The after-effects of temperature and irradiance during early growth of winter oilseed rape [Brassica napus L.var.oleifera, cv.Gorczanski] seedlings on the progress of their cold acclimation

• Autorzy: Rapacz M
• Języki publikacji: EN

Abstrakty

EN

Experiments performed under controlled conditions showed that level of PPFD (photosynthetic photon flux density) during early seedlings growth (preceding cold acclimation at +2 °C) was not the key factor for the development of frost resistance. It did not modify the beneficial effects of prehardening (Rapacz 1997, in this issue) at moderately low (+12 °C) day temperature. Now I have shown that the increase of PPFD may replace to some extent prehardening in the development of frost resistance. It was particularly seen in non-prehardened plants, which had been grown under warm-day (+20 °C) conditions. Prehardening performed under controlled conditions, as well as seedlings growth under natural autumn conditions in the field, allowed to maintain a high net-photosynthesis rate at chilling temperatures. A net-photosynthesis rate during cold acclimation at +2 °C corresponded well with higher frost resistance. As a result, seedlings non subjected to prehardening and grown before cold acclimation under low PPFD acclimated better, if the cold treatment was applied only at nights (+20/2 °C day/night). Only under such conditions the photosynthetic rate was sufficiently high to allow plants to reach a higher level of frost resistance. All other plants acclimated better when they were exposed to the hardening temperature continuously during days and nights (+2/2 °C day/night).

Słowa kluczowe

EN

oil seed; oilseed rape; frost resistance; Brassica napus var.oleifera; temperature; cold acclimation; growth; photosynthesis; irradiance

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 1998
• Tom: 20
• Numer: 1
• Opis fizyczny: p.73-78

Twórcy

autor

Rapacz M

• Cracow Agricultural University, Podluzna 3, 30-239 Cracow, Poland

Bibliografia

• Dörffling K., Schulenburg S., Lesselich G., Dörffling H., 1990. Abscisic acid and proline levels in cold hardened winter wheat leaves in relation to variety-specific differences in freezing resistance. J. Agron. & Crop Sci. 165: 230–239.
• Gray G.R., Chauvin L.-P., Sarhan F., Huner N.P.A., 1997. Cold acclimation and freezing tolerance. A complex interaction of light and temperature. Plant Physiol. 114: 467–474.
• Huner N.P.A., Öquist G., Hurry V.M., Krol M., Falk S., Griffith M., 1993. Photosynthesis, photoinhibition and low temperature acclimation in cold tolerant plants. Photosynthesis Research, 37(1): 19–39.
• Huner N.P.A., Maxwell D.P., Gray G.R., Savitch L.V., Krol M., Ivanov A.G., Falk S., 1996. Sensing environmental temperature change through imbalances between energy supply and energy consumption: Redox state of photosystem II. Physiol. Plant. 98: 358–364.
• Hurry V.M., Malmberg G., Gardestrom P., Öquist G., 1994. Effects of a short-term shift to low temperature and of long-term cold hardening on photosynthesis and ribulose-1,5-bisphosphate carboxylase/oxygenase and sucrose phosphate synthase activity in leaves of winter rye (Secale cereale L). Plant Physiol., 106(3): 983–990.
• Hurry V.M., Keerberg O., Parnik T., Gardestrom P., Öquist G., 1995a. Cold-hardening results in increased activity of enzymes involved in carbon metabolism in leaves of winter rye (Secale cereale L). Planta, 195(4): 554–562.
• Hurry V.M., Strand A., Tobiaeson M., Gardestrom P., Öquist G., 1995b. Cold hardening of spring and winter wheat and rape results in differential effects on growth, carbon metabolism, and carbohydrate content. Plant Physiol. 109(2): 697–706.
• Kacperska A., 1993. Water potential alterations — a prerequisite or a triggering stimulus for the development of freezing tolerance in overwintering herbaceous plants. In: Li P.H., Christersson L. (eds.), Advances in plant cold hardiness, CRC Press, Boca Raton Fl, USA, pp. 73–91.
• Kulesza L., Pukacki P., Kacperska A., 1986. Ice formation and frost killing temperatures as related to cold acclimation of winter rape plants. Acta Physiol. Plant. 8(3): 185–193.
• Levitt J., 1980. Responses of plants to environmental stresses, Second edition, Academic Press, New York.
• Öquist G., Hurry V.M., Huner N.P.A., 1993. Low-temperature effect on photosynthesis and correlation with freezing tolerance in spring and winter cultivars of wheat and rye. Plant Physiol., 101: 245–250.
• Rapacz M., 1998. The effects of day and night temperatures during early growth of winter rape seedlings on their morphology and cold acclimation responses. Acta Physiol. Plant., in this issue.
• Rybka Z., 1993. Changes in carbohydrate pool and osmolality in crowns and leaves of winter wheat seedlings during hardening to frost. Acta Physiol. Plant., 15(1): 47–55.
• Tantau, H. and Dörffling K., 1991. In vitro-selection of hydroxyproline-resistant cell lines of wheat (Triticum aestivum) — accumulation of proline, decrease in osmotic potential, and increase in frost tolerance. Physiol. Plant. 82: 243–248.
• Thomas H. and James A.R., 1993. Freezing tolerance and solute changes in contrasting genotypes of Lolium perenne L. acclimated to cold and drought. Annals of Botany 72(3): 246–254.