Page 30 - Volume 1, Issue 2, July 2008

Troyanos & Hipps 82
priate (Table 2) to explain the increase over
time in the leaf, stem, new shoot (shoots pro-
duced during the course of the experiment)
and root dry weight (mg), new shoot length
(cm), stem diameter (mm) and LA (cm2). There
was a significant (P<0.001) increase in the
growthof all the plant organswith increasing
external supply of Mg. The diameter of the
stem and new shoot extension growth also
increased significantly (P<0.05) with increas-
ing external supply of Mg. The root ÷ shoot
dry weight ratio (shoot = stems + leaves +
new shoots) increased with increasing exter-
nal supply of Mg (Figure 1). However, the dif-
ferences between 150 and 1500 μmol Mg l-1
were significant (P<0.05) on day 92. Further-
more, the root ÷ shoot dry weight ratio was
increased at all treatments (P<0.05).
Mineral nutrients contents
Magnesium
The [Mg] in leaves, stems, new shoots
Figure 1. The effect of Mg external supply on the root ÷ shoot
dry weight ratio of “Colt”. - 0, - 150 and - 1500
μmol Mg l-1. The vertical bars are the SEDs.
Figure 2. The effect of Mg external supplies on the [Mg] in leaves, stems, new shoots and roots of “Colt”. - 0,
- 150 and - 1500 μmol Mg l-1. The vertical bars are the SEDs.