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Transport of photoassimilates in plants under unfavourable environmental conditions

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Abstract

Transport of photoassimilates linking functionally plant, as a whole system, is discussed as a target for different environmental stresses. Anatomical, physiological and biochemical aspects of phloem transport, phloem loading and unloading are taken into consideration. In the light of modern theoríes of assimilate transport some historical hypotheses are also shown, due to their input into the progress of transport science.

The role of phloem unloading in plant acclimation to environment stress is not clear, however changes in source/sink ratio was often observed as the effect of stress. The blockage of sieve tubes found as the result of given stress may be of secondary importance. On the other hand, phloem loading process seems to be an important target for different environmental stresses.

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  1. Department of Plant Biochemistry and Physiology, Plant Breeding and Acclimatization Institute, P.O.B. 1019, 00-950, Warszawa

    Paweł Sowiński

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Sowiński, P. Transport of photoassimilates in plants under unfavourable environmental conditions. Acta Physiol Plant 21, 75–85 (1999). https://doi.org/10.1007/s11738-999-0030-z

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