K. Dimassitheriou et Am. Bosabalidis, EFFECTS OF LIGHT, MAGNESIUM AND SUCROSE ON LEAF ANATOMY, PHOTOSYNTHESIS, STARCH AND TOTAL SUGAR ACCUMULATION, IN KIWIFRUIT CULTURED IN-VITRO, Plant cell, tissue and organ culture, 47(2), 1996, pp. 127-134
Shootlets of kiwifruit plants (Actinidia deliciosa) were cultured in v
itro. Combinations of light intensity, Mg and sucrose in the cultures
showed that an increase of light intensity resulted in a corresponding
increase of the relative size of the leaf mesophyll cells and in a de
crease of the numbers of chloroplasts and contained starch grains. The
addition of sucrose to the substrate media negatively affected the si
ze of the mesophyll cells under normal Mg concentration (35 mg l(-1)),
and positively under high Mg concentration (105 mg l(-1)). Sucrose fu
rther resulted in an increase in the numbers of chloroplasts and conta
ined starch grains. The photosynthetic capacity of leaves greatly incr
eased when Mg concentration was enhanced and sucrose was excluded from
the nutrient substrate. Total sugar accumulation in all treatments wa
s favoured by normal light intensity and addition of sucrose.