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Differences between the effects of partial and whole plant chilling on carbon translocation of a C 4 grass
Author(s) -
POTVIN C.
Publication year - 1988
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/j.1365-3040.1988.tb01777.x
Subject(s) - chromosomal translocation , echinochloa , photosynthesis , sucrose , echinochloa crus galli , chemistry , horticulture , botany , biology , agronomy , food science , weed , biochemistry , gene
Experiments were conducted with Echinochloa crus‐galli to partition the effects of chilling the leaf vs. chilling the whole plant on subsequent 11 C translocation. The results clearly demonstrated that whole plant chilling was very detrimental whereas chilling only the leaf had no effect on subsequent translocation nor on 11 C uptake. The inhibition of translocation was due to a reduced rate and percentage of export while 11 C fixation rate was not significantly altered. When the leaf of a chilled plant was maintained at 22 °C, there was no impairment of the transport system nor of photosynthesis. The decrease in export with whole plant chilling may have been due to carbon movement into storage carbohydrates, resulting in a low sucrose gradient.