The effect of soil temperature on the net photosynthetic rate was studied by the method of multifactor analysis at early growth stages of narrow-leaved lupine (Lupinus angustifolius L.), white cabbage (Brassica capitata Lisg.), spring wheat (Triticum aestivum L.), cucumber (Cucumis sativus L.), tomato (Lycopersicon esculentum Mill.), and cotton (Gossypium hirsutum L.) plant species and cultivars contrasting in their heat demand. The optimum level of the net photosynthetic rate was observed in a wide range of soil and air temperatures, from cold- to heat-hardening temperatures, irrespective of the sign of the temperature gradient, whereas the magnitude and sign of the temperature gradient favorable for the highest potential net photosynthetic rate were species- and cultivar-specific and were not related to the cold tolerance of a species or cultivar.
Russian Journal of Plant Physiology – Springer Journals
Published: Oct 17, 2004
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